This file contains information about GCC releases which has been generated
automatically from the online release notes.  It covers releases of GCC
(and the former EGCS project) since EGCS 1.0, on the line of development
that led to GCC 3. For information on GCC 2.8.1 and older releases of GCC 2,
see ONEWS.

======================================================================
http://gcc.gnu.org/gcc-4.2/index.html

                           GCC 4.2 Release Series

   July 18, 2007

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 4.2.1.

   This release is a bug-fix release, containing fixes for regressions in GCC
   4.2.0 relative to previous releases of GCC.

   May 13, 2007

   The  [2]GNU project and the GCC developers are pleased to announce the
   release of GCC 4.2.0.

   This release is a major release, containing new features (as well as many
   other improvements) relative to GCC 4.1.x.

Release History

   GCC 4.2.1
          July 18, 2007 ([3]changes)

   GCC 4.2.0
          May 13, 2007 ([4]changes)

References and Acknowledgements

   GCC used to stand for the GNU C Compiler, but since the compiler supports
   several other languages aside from C, it now stands for the GNU Compiler
   Collection.

   A  list  of [5]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed new features, improvements, bug fixes, and other changes as well
   as test results to GCC. This [6]amazing group of volunteers is what makes
   GCC successful.

   For additional information about GCC please refer to the [7]GCC project web
   site or contact the [8]GCC development mailing list.

   To obtain GCC please use [9]our mirror sites, one of the [10]GNU mirror
   sites, or [11]our SVN server.

   Please send FSF & GNU inquiries & questions to [12]gnu@gnu.org. There are
   also [13]other ways to contact the FSF.

   These pages are maintained by [14]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [15]GCC manuals. If that fails, the [16]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [17]gcc@gnu.org or [18]gcc@gcc.gnu.org. All of
    our lists have [19]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2007-07-19 [20]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://www.gnu.org/
   3. http://gcc.gnu.org/gcc-4.2/changes.html
   4. http://gcc.gnu.org/gcc-4.2/changes.html
   5. http://gcc.gnu.org/gcc-4.2/buildstat.html
   6. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   7. http://gcc.gnu.org/index.html
   8. mailto:gcc@gcc.gnu.org
   9. http://gcc.gnu.org/mirrors.html
  10. http://www.gnu.org/order/ftp.html
  11. http://gcc.gnu.org/svn.html
  12. mailto:gnu@gnu.org
  13. http://www.gnu.org/home.html#ContactInfo
  14. http://gcc.gnu.org/about.html
  15. http://gcc.gnu.org/onlinedocs/
  16. mailto:gcc-help@gcc.gnu.org
  17. mailto:gcc@gnu.org
  18. mailto:gcc@gcc.gnu.org
  19. http://gcc.gnu.org/lists.html
  20. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-4.2/changes.html

                           GCC 4.2 Release Series
                      Changes, New Features, and Fixes

Caveats

     * GCC no longer accepts the -fshared-data option. This option has had no
       effect in any GCC 4 release; the targets to which the option used to
       apply had been removed before GCC 4.0.

General Optimizer Improvements

     * New  command-line options specify the possible relationships among
       parameters  and  between  parameters and global data. For example,
       -fargument-noalias-anything specifies that arguments do not alias any
       other storage.
       Each language will automatically use whatever option is required by the
       language standard. You should not need to use these options yourself.

New Languages and Language specific improvements

     * [1]OpenMP is now supported for the C, C++ and Fortran compilers.
     * New command line options -fstrict-overflow and -Wstrict-overflow have
       been added. -fstrict-overflow tells the compiler that it may assume that
       the program follows the strict signed overflow semantics permitted for
       the language: for C and C++ this means that the compiler may assume that
       signed overflow does not occur. For example, a loop like
      for (i = 1; i > 0; i *= 2)

       is presumably intended to continue looping until i overflows. With
       -fstrict-overflow, the compiler may assume that signed overflow will not
       occur, and transform this into an infinite loop. -fstrict-overflow is
       turned   on   by   default   at  -O2,  and  may  be  disabled  via
       -fno-strict-overflow. The -Wstrict-overflow option may be used to warn
       about cases where the compiler assumes that signed overflow will not
       occur. It takes five different levels: -Wstrict-overflow=1 to 5. See the
       [2]documentation for details. -Wstrict-overflow=1 is enabled by -Wall.
     * The new command line option -fno-toplevel-reorder directs GCC to emit
       top-level functions, variables, and asm statements in the same order
       that they appear in the input file. This is intended to support existing
       code which relies on a particular ordering (for example, code which uses
       top-level  asm statements to switch sections). For new code, it is
       generally  better  to  use  function  and variable attributes. The
       -fno-toplevel-reorder option may be used for most cases which currently
       use -fno-unit-at-a-time. The -fno-unit-at-a-time option will be removed
       in some future version of GCC. If you know of a case which requires
       -fno-unit-at-a-time which is not fixed by -fno-toplevel-reorder, please
       [3]open a bug report.

  C family

     * The  pragma  redefine_extname will now macro expand its tokens for
       compatibility with SunPRO.
     * In the next release of GCC, 4.3, -std=c99 or -std=gnu99 will direct GCC
       to  handle  inline  functions as specified in the C99 standard. In
       preparation for this, GCC 4.2 will warn about any use of non-static
       inline functions in gnu99 or c99 mode. This new warning may be disabled
       with the new gnu_inline function attribute or the new -fgnu89-inline
       command line option. Also, GCC 4.2 and later will define one of the
       preprocessor macros __GNUC_GNU_INLINE__ or __GNUC_STDC_INLINE__ to
       indicate the semantics of inline functions in the current compilation.
     * A  new  command line option -Waddress has been added to warn about
       suspicious uses of memory addresses as, for example, using the address
       of a function in a conditional expression, and comparisons against the
       memory address of a string literal. This warning is enabled by -Wall.

  C++

     * C++ visibility handling has been overhauled.
       Restricted  visiblity  is propagated from classes to members, from
       functions to local statics, and from templates and template arguments to
       instantiations, unless the latter has explicitly declared visibility.
       The visibility attribute for a class must come between the class-key and
       the name, not after the closing brace.
       Attributes are now allowed for enums and elaborated-type-specifiers that
       only declare a type.
       Members  of  the anonymous namespace are now local to a particular
       translation unit, along with any other declarations which use them,
       though they are still treated as having external linkage for language
       semantics.
     * The (undocumented) extension which permitted templates with default
       arguments  to  be bound to template template parameters with fewer
       parameters has been removed. For example:
        template <template <typename> class C>
        void f(C<double>) {}

        template <typename T, typename U = int>
        struct S {};

        template void f(S<double>);

       is no longer accepted by G++. The reason this code is not accepted is
       that S is a template with two parameters; therefore, it cannot be bound
       to C which has only one parameter.
     * The <?, >?, <?=, and >?= operators, deprecated in previous GCC releases,
       have been removed.
     * The command line option -fconst-strings, deprecated in previous GCC
       releases, has been removed.
     * The configure variable enable-__cxa_atexit is now enabled by default for
       more targets. Enabling this variable is necessary in order for static
       destructors to be executed in the correct order, but it depends upon the
       presence of a non-standard C library in the target library in order to
       work. The variable is now enabled for more targets which are known to
       have suitable C libraries.
     * -Wextra will produce warnings for if statements with a semicolon as the
       only body, to catch code like:
         if (a);
            return 1;
         return 0;

       To suppress the warning in valid cases, use { } instead.
     * The  C++  frontend now also produces strict aliasing warnings when
       -fstrict-aliasing -Wstrict-aliasing is in effect.

    Runtime Library (libstdc++)

     * Added support for TR1 <random>, <complex>, and C compatibility headers.
       In addition, a lock-free version of shared_ptr was contributed as part
       of  Phillip  Jordan's  Google  Summer of Code project on lock-free
       containers.  The  implementation  status for TR1 can be tracked in
       [4]tr1.html
     * In association with the Summer of Code work on lock-free containers, the
       interface  for  atomic  builtins  was  adjusted,  creating simpler
       alternatives for non-threaded code paths. Also, usage was consolidated
       and all elements were moved from namespace std to namespace__gnu_cxx.
       Affected interfaces are the functions __exchange_and_add, __atomic_add,
       and the objects __mutex, __recursive_mutex, and __scoped_lock.
     * Support for versioning weak symbol names via namespace association was
       added. However, as this changes the names of exported symbols, this is
       turned off by default in the current ABI. Intrepid users can enable this
       feature  by  using --enable-symvers=gnu-versioned-namespace during
       configuration.
     * Revised, simplified, and expanded policy-based associative containers,
       including data types for tree and trie forms (basic_tree, tree, trie),
       lists (list_update), and both collision-chaining and probing hash-based
       containers  (basic_hash_table, cc_hash_table, gp_hash_table). More
       details per the [5]documentation.
     * The implementation of the debug mode was modified, whereby the debug
       namespaces were nested inside of namespace std and namespace __gnu_cxx
       in order to resolve some long standing corner cases involving name
       lookup. Debug functionality from the policy-based data structures was
       consolidated and enabled with the single macro, _GLIBCXX_DEBUG. See PR
       26142 for more information.
     * Added extensions for type traits: __conditional_type, __numeric_traits,
       __add_unsigned, __removed_unsigned, __enable_if.
     * Added a typelist implementation for compile-time meta-programming.
       Elements for typelist construction and operation can be found within
       namespace __gnu_cxx::typelist.
     * Added  a  new  allocator,  __gnu_cxx::throw_allocator, for testing
       exception-safety.
     * Enabled library-wide visibility control, allowing -fvisibility to be
       used.
     * Consolidated all nested namespaces and the conversion of __gnu_internal
       implementation-private  details  to  anonymous namespaces whenever
       possible.
     * Implemented LWG resolutions DR 431 and DR 538.

  Fortran

     * Support for allocatable components has been added (TR 15581 and Fortran
       2003).
     * Support for the Fortran 2003 streaming IO extension has been added.
     * The GNU Fortran compiler now uses 4-byte record markers by default for
       unformatted files to be compatible with g77 and most other compilers.
       The  implementation  allows  for  records greater than 2 GB and is
       compatible with several other compilers. Older versions of gfortran used
       8-byte record markers by default (on most systems). In order to change
       the length of the record markers, e.g. to read unformatted files created
       by older gfortran versions, the [6]-frecord-marker=8 option can be used.

  Java (GCJ)

     * A new command line option -static-libgcj has been added for targets that
       use a linker compatible with GNU Binutils. As its name implies, this
       causes libgcj to be linked statically. In some cases this causes the
       resulting executable to start faster and use less memory than if the
       shared version of libgcj were used. However caution should be used as it
       can also cause essential parts of the library to be omitted. Some of
       these issues are discussed in:
       [7]http://gcc.gnu.org/wiki/Statically%20linking%20libgcj 
     * fastjar is no longer bundled with GCC. To build libgcj, you will need
       either InfoZIP (both zip and unzip) or an external jar program. In the
       former case, the GCC build will install a jar shell script that is based
       on InfoZIP and provides the same functionality as fastjar.

New Targets and Target Specific Improvements

  IA-32/x86-64

     * -mtune=generic can now be used to generate code running well on common
       x86 chips. This includes AMD Athlon, AMD Opteron, Intel Pentium-M, Intel
       Pentium 4 and Intel Core 2.
     * -mtune=native and -march=native will produce code optimized for the host
       architecture as detected using the cpuid instruction.
     * Added a new command line option -fstackrealign and and __attribute__
       ((force_align_arg_pointer)) to realign the stack at runtime. This allows
       functions compiled with a vector-aligned stack to be invoked from legacy
       objects that keep only word-alignment.

  SPARC

     * The default CPU setting has been changed from V7 to V9 in 32-bit mode on
       Solaris 7 and above. This is already the case in 64-bit mode. It can be
       overridden by specifying --with-cpu at configure time.
     * Back-end support of built-in functions for atomic memory access has been
       implemented.
     * Support for the Sun UltraSPARC T1 (Niagara) processor has been added.

  M32C

     * Various bug fixes have made some functions (notably, functions returning
       structures)  incompatible  with previous releases. Recompiling all
       libraries  is recommended. Note that code quality has considerably
       improved since 4.1, making a recompile even more beneficial.

  MIPS

     * Added support for the Broadcom SB-1A core.

  IA-64

     * Added  support  for IA-64 data and control speculation. By default
       speculation is enabled only during second scheduler pass. A number of
       machine flags was introduced to control the usage of speculation for
       both scheduler passes.

  HPPA

     * Added Java language support (libffi and libjava) for 32-bit HP-UX 11
       target.

Obsolete Systems

Documentation improvements

  PDF Documentation

     * A make pdf target has been added to the top-level makefile, enabling
       automated production of PDF documentation files. (Front-ends external to
       GCC should modify their Make-lang.in file to add a lang.pdf: target.)

Other significant improvements

  Build system improvements

     * All the components of the compiler are now bootstrapped by default. This
       improves  the  resilience to bugs in the system compiler or binary
       compatibility problems, as well as providing better testing of GCC 4.2
       itself. In addition, if you build the compiler from a combined tree, the
       assembler, linker, etc. will also be bootstrapped (i.e. built with
       themselves).
       You can disable this behavior, and go back to the pre-GCC 4.2 set up, by
       configuring GCC with --disable-bootstrap.
     * The rules that configure follows to find target tools resemble more
       closely the locations that the built compiler will search. In addition,
       you can use the new configure option --with-target-tools to specify
       where to find the target tools used during the build, without affecting
       what the built compiler will use.
       This  can  be especially useful when building packages of GCC. For
       example,  you may want to build GCC with GNU as or ld, even if the
       resulting compiler to work with the native assembler and linker. To do
       so, you can use --with-target-tools to point to the native tools.

  Incompatible changes to the build system

     * Front-ends external to GCC should modify their Make-lang.in file to
       replace  double-colon  rules  (e.g. dvi::) with normal rules (like
       lang.dvi:). Front-end makefile hooks do not use double-colon rules
       anymore.
     * Up to GCC 4.1, a popular way to specify the target tools used during the
       build was to create directories named gas, binutils, etc. in the build
       tree, and create links to the tools from there. This does not work any
       more  when  the compiler is bootstrapped. The new configure option
       --with-target-tools provides a better way to achieve the same effect,
       and works for all native and cross settings.

   Please send FSF & GNU inquiries & questions to [8]gnu@gnu.org. There are
   also [9]other ways to contact the FSF.

   These pages are maintained by [10]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [11]GCC manuals. If that fails, the [12]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [13]gcc@gnu.org or [14]gcc@gcc.gnu.org. All of
    our lists have [15]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2007-05-12 [16]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/projects/gomp/
   2. http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
   3. http://gcc.gnu.org/bugs.html
   4. http://gcc.gnu.org/onlinedocs/libstdc++/ext/tr1.html
   5. http://gcc.gnu.org/onlinedocs/libstdc++/ext/pb_ds/index.html
   6. http://gcc.gnu.org/onlinedocs/gfortran/Runtime-Options.html
   7. http://gcc.gnu.org/wiki/Statically%20linking%20libgcj
   8. mailto:gnu@gnu.org
   9. http://www.gnu.org/home.html#ContactInfo
  10. http://gcc.gnu.org/about.html
  11. http://gcc.gnu.org/onlinedocs/
  12. mailto:gcc-help@gcc.gnu.org
  13. mailto:gcc@gnu.org
  14. mailto:gcc@gcc.gnu.org
  15. http://gcc.gnu.org/lists.html
  16. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-4.1/index.html

                           GCC 4.1 Release Series

   February 13, 2007

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 4.1.2.

   This release is a bug-fix release, containing fixes for regressions in GCC
   4.1.1 relative to previous releases of GCC.

Release History

   GCC 4.1.2
          February 13, 2007 ([2]changes)

   GCC 4.1.1
          May 24, 2006 ([3]changes)

   GCC 4.1.0
          February 28, 2006 ([4]changes)

References and Acknowledgements

   GCC used to stand for the GNU C Compiler, but since the compiler supports
   several other languages aside from C, it now stands for the GNU Compiler
   Collection.

   A  list  of [5]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed new features, improvements, bug fixes, and other changes as well
   as test results to GCC. This [6]amazing group of volunteers is what makes
   GCC successful.

   For additional information about GCC please refer to the [7]GCC project web
   site or contact the [8]GCC development mailing list.

   To obtain GCC please use [9]our mirror sites, one of the [10]GNU mirror
   sites, or [11]our SVN server.

   Please send FSF & GNU inquiries & questions to [12]gnu@gnu.org. There are
   also [13]other ways to contact the FSF.

   These pages are maintained by [14]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [15]GCC manuals. If that fails, the [16]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [17]gcc@gnu.org or [18]gcc@gcc.gnu.org. All of
    our lists have [19]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2007-02-14 [20]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://gcc.gnu.org/gcc-4.1/changes.html#4.1.2
   3. http://gcc.gnu.org/gcc-4.1/changes.html
   4. http://gcc.gnu.org/gcc-4.1/changes.html
   5. http://gcc.gnu.org/gcc-4.1/buildstat.html
   6. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   7. http://gcc.gnu.org/index.html
   8. mailto:gcc@gcc.gnu.org
   9. http://gcc.gnu.org/mirrors.html
  10. http://www.gnu.org/order/ftp.html
  11. http://gcc.gnu.org/svn.html
  12. mailto:gnu@gnu.org
  13. http://www.gnu.org/home.html#ContactInfo
  14. http://gcc.gnu.org/about.html
  15. http://gcc.gnu.org/onlinedocs/
  16. mailto:gcc-help@gcc.gnu.org
  17. mailto:gcc@gnu.org
  18. mailto:gcc@gcc.gnu.org
  19. http://gcc.gnu.org/lists.html
  20. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-4.1/changes.html

                           GCC 4.1 Release Series
                      Changes, New Features, and Fixes

   The latest release in the 4.1 release series is [1]GCC 4.1.2.

Caveats

General Optimizer Improvements

     * GCC now has infrastructure for inter-procedural optimizations and the
       following inter-procedural optimizations are implemented:
          + Profile  guided  inlining. When doing profile feedback guided
            optimization, GCC can now use the profile to make better informed
            decisions on whether inlining of a function is profitable or not.
            This means that GCC will no longer inline functions at call sites
            that are not executed very often, and that functions at hot call
            sites are more likely to be inlined.
            A  new parameter min-inline-recursive-probability is also now
            available to throttle recursive inlining of functions with small
            average recursive depths.
          + Discovery of pure and const functions, a form of side-effects
            analysis. While older GCC releases could also discover such special
            functions, the new IPA-based pass runs earlier so that the results
            are available to more optimizers. The pass is also simply more
            powerful than the old one.
          + Analysis  of  references  to static variables and type escape
            analysis, also forms of side-effects analysis. The results of these
            passes  allow  the  compiler  to  be  less conservative about
            call-clobbered variables and references. This results in more
            redundant loads being eliminated and in making static variables
            candidates for register promotion.
          + Improvement of RTL-based alias analysis. The results of type escape
            analysis are fed to the RTL type-based alias analyzer, allowing it
            to disambiguate more memory references.
          + Interprocedural constant propagation and function versioning. This
            pass looks for functions that are always called with the same
            constant value for one or more of the function arguments, and
            propagates those constants into those functions.
          + GCC will now eliminate static variables whose usage was optimized
            out.
          + -fwhole-program --combine can now be used to make all functions in
            program  static  allowing  whole  program optimization. As an
            exception, the main function and all functions marked with the new
            externally_visible attribute are kept global so that programs can
            link with runtime libraries.
     * GCC can now do a form of partial dead code elimination (PDCE) that
       allows code motion of expressions to the paths where the result of the
       expression is actually needed. This is not always a win, so the pass has
       been limited to only consider profitable cases. Here is an example:
    int foo (int *, int *);
    int
    bar (int d)
    {
      int a, b, c;
      b = d + 1;
      c = d + 2;
      a = b + c;
      if (d)
        {
          foo (&b, &c);
          a = b + c;
        }
      printf ("%d\n", a);
    }
               The  a  =  b  +  c  can be sunk to right before the printf. Normal
       code sinking will not do this, it will sink the first one above into the
       else-branch of the conditional jump, which still gives you two copies of
       the code.
     * GCC now has a value range propagation pass. This allows the compiler to
       eliminate bounds checks and branches. The results of the pass can also
       be used to accurately compute branch probabilities.
     * The  pass  to  convert  PHI nodes to straight-line code (a form of
       if-conversion for GIMPLE) has been improved significantly. The two most
       significant improvements are an improved algorithm to determine the
       order in which the PHI nodes are considered, and an improvement that
       allow the pass to consider if-conversions of basic blocks with more than
       two predecessors.
     * Alias analysis improvements. GCC can now differentiate between different
       fields of structures in Tree-SSA's virtual operands form. This lets
       stores/loads from non-overlapping structure fields not conflict. A new
       algorithm to compute points-to sets was contributed that can allows GCC
       to see now that p->a and p->b, where p is a pointer to a structure, can
       never point to the same field.
     * Various enhancements to auto-vectorization:
          + Incrementally preserve SSA form when vectorizing.
          + Incrementally preserve loop-closed form when vectorizing.
          + Improvements to peeling for alignment: generate better code when
            the misalignment of an access is known at compile time, or when
            different accesses are known to have the same misalignment, even if
            the misalignment amount itself is unknown.
          + Consider dependence distance in the vectorizer.
          + Externalize generic parts of data reference analysis to make this
            analysis available to other passes.
          + Vectorization of conditional code.
          + Reduction support.
     * GCC can now partition functions in sections of hot and cold code. This
       can significantly improve performance due to better instruction cache
       locality. This feature works best together with profile feedback driven
       optimization.
     * A new pass to avoid saving of unneeded arguments to the stack in vararg
       functions if the compiler can prove that they will not be needed.
     * Transition of basic block profiling to tree level implementation has
       been completed. The new implementation should be considerably more
       reliable  (hopefully  avoiding  profile mismatch errors when using
       -fprofile-use or -fbranch-probabilities) and can be used to drive higher
       level optimizations, such as inlining.
       The  -ftree-based-profiling  command  line  option was removed and
       -fprofile-use  now  implies disabling old RTL level loop optimizer
       (-fno-loop-optimize). Speculative prefetching optimization (originally
       enabled by -fspeculative-prefetching) was removed.

New Languages and Language specific improvements

  C and Objective-C

     * The old Bison-based C and Objective-C parser has been replaced by a new,
       faster hand-written recursive-descent parser.

  Ada

     * The build infrastructure for the Ada runtime library and tools has been
       changed  to  be  better  integrated  with  the  rest  of the build
       infrastructure of GCC. This should make doing cross builds of Ada a bit
       easier.

  C++

     * ARM-style  name-injection  of friend declarations is no longer the
       default. For example:
          struct S {
            friend void f();
          };

          void g() { f(); }
       will not be accepted; instead a declaration of f will need to be present
       outside of the scope of S. The new -ffriend-injection option will enable
       the old behavior.
     * The (undocumented) extension which permitted templates with default
       arguments  to  be bound to template template parameters with fewer
       parameters has been deprecated, and will be removed in the next major
       release of G++. For example:
       template <template <typename> class C>
       void f(C<double>) {}

       template <typename T, typename U = int>
       struct S {};

       template void f(S<double>);

       makes use of the deprecated extension. The reason this code is not valid
       ISO C++ is that S is a template with two parameters; therefore, it
       cannot be bound to C which has only one parameter.

    Runtime Library (libstdc++)

     * Optimization work:
          + A  new  implementation  of  std::search_n is provided, better
            performing in case of random access iterators.
          + Added further efficient specializations of istream functions, i.e.,
            character array and string extractors.
          + Other smaller improvements throughout.
     * Policy-based associative containers, designed for high-performance,
       flexibility and semantic safety are delivered in ext/pb_assoc.
     * A  versatile  string  class,  __gnu_cxx::__versa_string, providing
       facilities conforming to the standard requirements for basic_string, is
       delivered in <ext/vstring.h>. In particular:
          + Two base classes are provided: the default one avoids reference
            counting and is optimized for short strings; the alternate one,
            still uses it while improving in a few low level areas (e.g.,
            alignment). See vstring_fwd.h for some useful typedefs.
          + Various algorithms have been rewritten (e.g., replace), the code
            streamlined and simple optimizations added.
          + Option 3 of DR 431 is implemented for both available bases, thus
            improving the support for stateful allocators.
     * As  usual,  many  bugs  have  been  fixed  (e.g., libstdc++/13583,
       libstdc++/23953) and LWG resolutions put into effect for the first time
       (e.g., DR 280, DR 464, N1780 recommendations for DR 233, TR1 Issue
       6.19). The implementation status of TR1 is now tracked in the docs in
       tr1.html.

  Objective-C++

     * A new language front end for Objective-C++ has been added. This language
       allows users to mix the object oriented features of Objective-C with
       those of C++.

  Java (GCJ)

     * Core  library  (libgcj) updates based on GNU Classpath 0.15 - 0.19
       features (plus some 0.20 bug-fixes)
          + Networking
               o The  java.net.HttpURLConnection implementation no longer
                 buffers the entire response body in memory. This means that
                 response  bodies larger than available memory can now be
                 handled.
          + (N)IO
               o NIO   FileChannel.map   implementation,  fast  bulk  put
                 implementation for DirectByteBuffer (speeds up this method
                 10x).
               o FileChannel.lock() and FileChannel.force() implemented.
          + XML
               o gnu.xml fix for nodes created outside a namespace context.
               o Add support for output indenting and cdata-section-elements
                 output instruction in xml.transform.
               o xml.xpath corrections for cases where elements/attributes
                 might  have  been  created  in non-namespace-aware mode.
                 Corrections to handling of XSL variables and minor conformance
                 updates.
          + AWT
               o GNU JAWT implementation, the AWT Native Interface, which
                 allows direct access to native screen resources from within a
                 Canvas's paint method. GNU Classpath Examples comes with a
                 Demo, see libjava/classpath/examples/README.
               o awt.datatransfer updated to 1.5 with support for FlavorEvents.
                 The gtk+ awt peers now allow copy/paste of text, images,
                 URIs/files and serialized objects with other applications and
                 tracking clipboard change events with gtk+ 2.6 (for gtk+ 2.4
                 only  text  and serialized objects are supported). A GNU
                 Classpath Examples datatransfer Demo was added to show the new
                 functionality.
               o Split gtk+ awt peers event handling in two threads and improve
                 gdk lock handling (solves several awt lock ups).
               o Speed up awt Image loading.
               o Better gtk+ scrollbar peer implementation when using gtk+ >=
                 2.6.
               o Handle  image loading errors correctly for gdkpixbuf and
                 MediaTracker.
               o Better  handle  GDK lock. Properly prefix gtkpeer native
                 functions (cp_gtk).
               o GdkGraphics2D has been updated to use Cairo 0.5.x or higher.
               o BufferedImage  and  GtkImage rewrites. All image drawing
                 operations should now work correctly (flipping requires gtk+
                 >= 2.6)
               o Future Graphics2D, image and text work is documented at:
                 [2]http://developer.classpath.org/mediation/ClasspathGraphicsI
                 magesText 
               o When gtk+ 2.6 or higher is installed the default log handler
                 will produce stack traces whenever a WARNING, CRITICAL or
                 ERROR message is produced.
          + Free Swing
               o The  RepaintManager has been reworked for more efficient
                 painting, especially for large GUIs.
               o The layout manager OverlayLayout has been implemented, the
                 BoxLayout   has  been  rewritten  to  make  use  of  the
                 SizeRequirements utility class and caching for more efficient
                 layout.
               o Improved accessibility support.
               o Significant progress has been made in the implementation of
                 the javax.swing.plaf.metal package, with most UI delegates in
                 a  working  state  now.  Please  test this with your own
                 applications and provide feedback that will help us to improve
                 this package.
               o The GUI demo (gnu.classpath.examples.swing.Demo) has been
                 extended to highlight various features in our Free Swing
                 implementation. And it includes a look and feel switcher for
                 Metal (default), Ocean and GNU themes.
               o The javax.swing.plaf.multi package is now implemented.
               o Editing and several key actions for JTree and JTable were
                 implemented.
               o Lots of icons and look and feel improvements for Free Swing
                 basic  and  metal themes were added. Try running the GNU
                 Classpath Swing Demo in examples
                 (gnu.classpath.examples.swing.Demo)                with:
                 -Dswing.defaultlaf=javax.swing.plaf.basic.BasicLookAndFeelor
                 -Dswing.defaultlaf=javax.swing.plaf.metal.MetalLookAndFeel
               o Start of styled text capabilites for java.swing.text.
               o DefaultMutableTreeNode pre-order, post-order, depth-first and
                 breadth-first traversal enumerations implemented.
               o JInternalFrame colors and titlebar draw properly.
               o JTree is working up to par (icons, selection and keyboard
                 traversal).
               o JMenus were made more compatible in visual and programmatic
                 behavior.
               o JTable changeSelection and multiple selections implemented.
               o JButton and JToggleButton change states work properly now.
               o JFileChooser fixes.
               o revalidate() and repaint() fixes which make Free Swing much
                 more responsive.
               o MetalIconFactory implemented.
               o Free Swing Top-Level Compatibility. JFrame, JDialog, JApplet,
                 JInternalFrame, and JWindow are now 1.5 compatible in the
                 sense that you can call add() and setLayout() directly on
                 them,  which  will  have  the  same  effect  as  calling
                 getContentPane().add() and getContentPane().setLayout().
               o The JTree interface has been completed. JTrees now recognizes
                 mouse clicks and selections work.
               o BoxLayout works properly now.
               o Fixed GrayFilter to actually work.
               o Metal SplitPane implemented.
               o Lots of Free Swing text and editor stuff work now.
          + Free RMI and Corba
               o Andrew Watson, Vice President and Technical Director of the
                 Object Management Group, has officially assigned us 20 bit
                 Vendor Minor Code Id: 0x47430 ("GC") that will mark remote
                 classpath-specific system exceptions. Obtaining the VMCID
                 means that GNU Classpath now is a recogniseable type of node
                 in a highly interoperable CORBA world.
               o GNU Classpath now includes the first working draft to support
                 the RMI over IIOP protocol. The current implementation is
                 capable  of  remote  invocations,  transferring  various
                 Serializables and Externalizables via RMI-IIOP protocol. It
                 can flatten graphs and, at least for the simple cases, is
                 interoperable with 1.5 JDKs.
               o org.omg.PortableInterceptor and related functionality in other
                 packages is now implemented:
                    # The sever and client interceptors work as required since
                      1.4.
                    # The IOR interceptor works as needed for 1.5.
               o The org.omg.DynamicAny package is completed and passes the
                 prepared tests.
               o The Portable Object Adapter should now support the output of
                 the recent IDL to java compilers. These compilers now generate
                 servants and not CORBA objects as before, making the output
                 depend on the existing POA implementation. Completing POA
                 means that such code can already be tried to run on Classpath.
                 Our POA is tested for the following usager scenarios:
                    # POA converts servant to the CORBA object.
                    # Servant provides to the CORBA object.
                    # POA activates new CORBA object with the given Object Id
                      (byte array) that is later accessible for the servant.
                    # During the first call, the ServantActivator provides
                      servant for this and all subsequent calls on the current
                      object.
                    # During each call, the ServantLocator provides servant for
                      this call only.
                    # ServantLocator or ServantActivator forwards call to
                      another server.
                    # POA has a single servant, responsible for all objects.
                    # POA  has  a  default  servant, but some objects are
                      explicitly connected to they specific servants.
                 The POA is verified using tests from the former cost.omg.org.
               o The CORBA implementation is now a working prototype that
                 should support features up to 1.3 inclusive. We invite groups
                 writing  CORBA  dependent  applications to try Classpath
                 implementation,  reporting  any possible bugs. The CORBA
                 prototype is interoperable with Sun's implementation v 1.4,
                 transferring object references, primitive types, narrow and
                 wide strings, arrays, structures, trees, abstract interfaces
                 and value types (feature of CORBA 2.3) between these two
                 platforms. Remote exceptions are transferred and handled
                 correctly. The stringified object references (IORs) from
                 various sources are parsed as required. The transient (for
                 current session) and permanent (till jre restart) redirections
                 work.  Both  Little  and Big Endian encoded messages are
                 accepted. The implementation is verified using tests from the
                 former cost.omg.org. The current release includes working
                 examples (see the examples directory), demonstrating the
                 client-server communication, using either CORBA Request or
                 IDL-based stub (usually generated by a IDL to java compiler).
                 These examples also show how to use the Classpath CORBA naming
                 service. The IDL to java compiler is not yet written, but as
                 our library must be compatible, it naturally accepts the
                 output of other idlj implementations.
          + Misc
               o Updated TimeZone data against Olson tzdata2005l.
               o Make zip and jar packages UTF-8 clean.
               o "native" code builds and compiles (warning free) on Darwin and
                 Solaris.
               o java.util.logging.FileHandler now rotates files.
               o Start of a generic JDWP framework in gnu/classpath/jdwp. This
                 is  unfinished, but feedback (at classpath@gnu.org) from
                 runtime hackers is greatly appreciated. Although most of the
                 work is currently being done around gcj/gij we want this
                 framework to be as VM neutral as possible. Early design is
                 described in:
                 [3]http://gcc.gnu.org/ml/java/2005-05/msg00260.html
               o QT4 AWT peers, enable by giving configure --enable-qt-peer.
                 Included,  but  not  ready  for production yet. They are
                 explicitly disabled and not supported. But if you want to help
                 with the development of these new features we are interested
                 in feedback. You will have to explicitly enable them to try
                 them out (and they will most likely contain bugs).
               o Documentation    fixes   all   over   the   place.   See
                 [4]http://developer.classpath.org/doc/

New Targets and Target Specific Improvements

  IA-32/x86-64

     * The x86-64 medium model (that allows building applications whose data
       segment exceeds 4GB) was redesigned to match latest ABI draft. New
       implementation  split  large  datastructures into separate segment
       improving performance of accesses to small datastructures and also
       allows linking of small model libraries into medium model programs as
       long  as  the libraries are not accessing the large datastructures
       directly. Medium model is also supported in position independent code
       now.
       The ABI change results in partial incompatibility among medium model
       objects. Linking medium model libraries (or objects) compiled with new
       compiler into medium model program compiled with older will likely
       result in exceeding ranges of relocations.
       Binutils 2.16.91 or newer are required for compiling medium model now.

  RS6000 (POWER/PowerPC)

     * The AltiVec vector primitives in <altivec.h> are now implemented in a
       way that puts a smaller burden on the preprocessor, instead processing
       the "overloading" in the front ends. This should benefit compilation
       speed on AltiVec vector code.
     * AltiVec initializers now are generated more efficiently.
     * The popcountb instruction available on POWER5 now is generated.
     * The floating point round to integer instructions available on POWER5+
       now is generated.
     * Floating point divides can be synthesized using the floating point
       reciprocal estimate instructions.
     * Double precision floating point constants are initialized as single
       precision values if they can be represented exactly.

  S/390, zSeries and System z9

     * Support for the IBM System z9 109 processor has been added. When using
       the -march=z9-109 option, the compiler will generate code making use of
       instructions provided by the extended immediate facility.
     * Support for 128-bit IEEE floating point has been added. When using the
       -mlong-double-128 option, the compiler will map the long double data
       type to 128-bit IEEE floating point. Using this option constitutes an
       ABI change, and requires glibc support.
     * Various changes to improve performance of generated code have been
       implemented, including:
          + In functions that do not require a literal pool, register %r13
            (which is traditionally reserved as literal pool pointer), can now
            be freely used for other purposes by the compiler.
          + More  precise tracking of register use allows the compiler to
            generate more efficient function prolog and epilog code in certain
            cases.
          + The  SEARCH  STRING,  COMPARE LOGICAL STRING, and MOVE STRING
            instructions are now used to implement C string functions.
          + The MOVE CHARACTER instruction with single byte overlap is now used
            to implement the memset function with non-zero fill byte.
          + The LOAD ZERO instructions are now used where appropriate.
          + The INSERT CHARACTERS UNDER MASK, STORE CHARACTERS UNDER MASK, and
            INSERT IMMEDIATE instructions are now used more frequently to
            optimize bitfield operations.
          + The BRANCH ON COUNT instruction is now used more frequently. In
            particular, the fact that a loop contains a subroutine call no
            longer prevents the compiler from using this instruction.
          + The compiler is now aware that all shift and rotate instructions
            implicitly truncate the shift count to six bits.
     * Back-end  support  for  the  following  generic  features has been
       implemented:
          + The full set of [5]built-in functions for atomic memory access.
          + The -fstack-protector feature.
          + The optimization pass avoiding unnecessary stores of incoming
            argument registers in functions with variable argument list.

  SPARC

     * The  default  code  model  in  64-bit  mode  has been changed from
       Medium/Anywhere to Medium/Middle on Solaris.
     * TLS support is disabled by default on Solaris prior to release 10. It
       can be enabled on TLS-capable Solaris 9 versions (4/04 release and
       later) by specifying --enable-tls at configure time.

  MorphoSys

     * Support has been added for this new architecture.

Obsolete Systems

Documentation improvements

Other significant improvements

     * GCC can now emit code for protecting applications from stack-smashing
       attacks. The protection is realized by buffer overflow detection and
       reordering of stack variables to avoid pointer corruption.
     * Some built-in functions have been fortified to protect them against
       various buffer overflow (and format string) vulnerabilities. Compared to
       the mudflap bounds checking feature, the safe builtins have far smaller
       overhead. This means that programs built using safe builtins should not
       experience any measurable slowdown.

GCC 4.1.2

   This is the [6]list of problem reports (PRs) from GCC's bug tracking system
   that are known to be fixed in the 4.1.2 release. This list might not be
   complete (that is, it is possible that some PRs that have been fixed are not
   listed here).

   When generating code for a shared library, GCC now recognizes that global
   functions may be replaced when the program runs. Therefore, it is now more
   conservative in deducing information from the bodies of functions. For
   example, in this example:
    void f() {}
    void g() {
     try { f(); }
     catch (...) {
       cout << "Exception";
     }
    }


   G++ would previously have optimized away the catch clause, since it would
   have concluded that f cannot throw exceptions. Because users may replace f
   with another function in the main body of the program, this optimization is
   unsafe, and is no longer performed. If you wish G++ to continue to optimize
   as before, you must add a throw() clause to the declaration of f to make
   clear that it does not throw exceptions.

   Please send FSF & GNU inquiries & questions to [7]gnu@gnu.org. There are
   also [8]other ways to contact the FSF.

   These pages are maintained by [9]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [10]GCC manuals. If that fails, the [11]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [12]gcc@gnu.org or [13]gcc@gcc.gnu.org. All of
    our lists have [14]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2007-02-14 [15]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/gcc-4.1/changes.html#4.1.2
   2. http://developer.classpath.org/mediation/ClasspathGraphicsImagesText
   3. http://gcc.gnu.org/ml/java/2005-05/msg00260.html
   4. http://developer.classpath.org/doc/
   5. http://gcc.gnu.org/onlinedocs/gcc-4.1.0/gcc/Atomic-Builtins.html
   6. http://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=4.1.2
   7. mailto:gnu@gnu.org
   8. http://www.gnu.org/home.html#ContactInfo
   9. http://gcc.gnu.org/about.html
  10. http://gcc.gnu.org/onlinedocs/
  11. mailto:gcc-help@gcc.gnu.org
  12. mailto:gcc@gnu.org
  13. mailto:gcc@gcc.gnu.org
  14. http://gcc.gnu.org/lists.html
  15. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-4.0/index.html

                           GCC 4.0 Release Series

   January 31, 2007

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 4.0.4.

   This release is a bug-fix release, containing fixes for regressions in GCC
   4.0.3 relative to previous releases of GCC.

Release History

   GCC 4.0.4
          January 31, 2007 ([2]changes)

   GCC 4.0.3
          March 10, 2006 ([3]changes)

   GCC 4.0.2
          September 28, 2005 ([4]changes)

   GCC 4.0.1
          July 7, 2005 ([5]changes)

   GCC 4.0.0
          April 20, 2005 ([6]changes)

References and Acknowledgements

   GCC used to stand for the GNU C Compiler, but since the compiler supports
   several other languages aside from C, it now stands for the GNU Compiler
   Collection.

   A  list  of [7]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed new features, improvements, bug fixes, and other changes as well
   as test results to GCC. This [8]amazing group of volunteers is what makes
   GCC successful.

   For additional information about GCC please refer to the [9]GCC project web
   site or contact the [10]GCC development mailing list.

   To obtain GCC please use [11]our mirror sites, one of the [12]GNU mirror
   sites, or [13]our SVN server.

   Please send FSF & GNU inquiries & questions to [14]gnu@gnu.org. There are
   also [15]other ways to contact the FSF.

   These pages are maintained by [16]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [17]GCC manuals. If that fails, the [18]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [19]gcc@gnu.org or [20]gcc@gcc.gnu.org. All of
    our lists have [21]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2007-02-03 [22]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://gcc.gnu.org/gcc-4.0/changes.html#4.0.4
   3. http://gcc.gnu.org/gcc-4.0/changes.html#4.0.3
   4. http://gcc.gnu.org/gcc-4.0/changes.html#4.0.2
   5. http://gcc.gnu.org/gcc-4.0/changes.html#4.0.1
   6. http://gcc.gnu.org/gcc-4.0/changes.html
   7. http://gcc.gnu.org/gcc-4.0/buildstat.html
   8. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   9. http://gcc.gnu.org/index.html
  10. mailto:gcc@gcc.gnu.org
  11. http://gcc.gnu.org/mirrors.html
  12. http://www.gnu.org/order/ftp.html
  13. http://gcc.gnu.org/svn.html
  14. mailto:gnu@gnu.org
  15. http://www.gnu.org/home.html#ContactInfo
  16. http://gcc.gnu.org/about.html
  17. http://gcc.gnu.org/onlinedocs/
  18. mailto:gcc-help@gcc.gnu.org
  19. mailto:gcc@gnu.org
  20. mailto:gcc@gcc.gnu.org
  21. http://gcc.gnu.org/lists.html
  22. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-4.0/changes.html

                           GCC 4.0 Release Series
                      Changes, New Features, and Fixes

   The latest release in the 4.0 release series is [1]GCC 4.0.4.

Caveats

     * GCC now generates location lists by default when compiling with debug
       info and optimization.
          + GDB 6.0 and older crashes when it sees location lists. GDB 6.1 or
            later is needed to debug binaries containing location lists.
          + When you are trying to view a value of a variable in a part of a
            function where it has no location (for example when the variable is
            no longer used and thus its location was used for something else)
            GDB will say that it is not available.
       You can disable generating location lists by -fno-var-tracking.
     * GCC no longer accepts the -fwritable-strings option. Use named character
       arrays when you need a writable string.
     * The  options  -freduce-all-givs  and -fmove-all-movables have been
       discontinued.  They  were  used to circumvent a shortcoming in the
       heuristics of the old loop optimization code with respect to common
       Fortran constructs. The new (tree) loop optimizer works differently and
       doesn't need those work-arounds.
     * The graph-coloring register allocator, formerly enabled by the option
       -fnew-ra, has been discontinued.
     * -I- has been deprecated. -iquote is meant to replace the need for this
       option.
     * The MIPS -membedded-pic and -mrnames options have been removed.
     * All MIPS targets now require the GNU assembler. In particular, IRIX
       configurations can no longer use the MIPSpro assemblers, although they
       do still support the MIPSpro linkers.
     * The SPARC option -mflat has been removed.
     * English-language diagnostic messages will now use Unicode quotation
       marks in UTF-8 locales. (Non-English messages already used the quotes
       appropriate for the language in previous releases.) If your terminal
       does not support UTF-8 but you are using a UTF-8 locale (such locales
       are  the  default  on  many GNU/Linux systems) then you should set
       LC_CTYPE=C in the environment to disable that locale. Programs that
       parse diagnostics and expect plain ASCII English-language messages
       should  set  LC_ALL=C. See [2]Markus Kuhn's explanation of Unicode
       quotation marks for more information.
     * The specs file is no longer installed on most platforms. Most users will
       be totally unaffected. However, if you are accustomed to editing the
       specs file yourself, you will now have to use the -dumpspecs option to
       generate the specs file, and then edit the resulting file.

General Optimizer Improvements

     * The [3]tree ssa branch has been merged. This merge has brought in a
       completely  new  optimization  framework  based  on a higher level
       intermediate  representation than the existing RTL representation.
       Numerous  new  code transformations based on the new framework are
       available in GCC 4.0, including:
          + Scalar replacement of aggregates
          + Constant propagation
          + Value range propagation
          + Partial redundancy elimination
          + Load and store motion
          + Strength reduction
          + Dead store elimination
          + Dead and unreachable code elimination
          + [4]Autovectorization
          + Loop interchange
          + Tail recursion by accumulation
       Many of these passes outperform their counterparts from previous GCC
       releases.
     * [5]Swing Modulo Scheduling (SMS). An RTL level instruction scheduling
       optimization intended for loops that perform heavy computations.

New Languages and Language specific improvements

  C family

     * The sentinel attribute has been added to GCC. This function attribute
       allows GCC to warn when variadic functions such as execl are not NULL
       terminated.  See  the GCC manual for a complete description of its
       behavior.
     * Given __attribute__((alias("target"))) it is now an error if target is
       not a symbol, defined in the same translation unit. This also applies to
       aliases created by #pragma weak alias=target. This is because it's
       meaningless to define an alias to an undefined symbol. On Solaris, the
       native assembler would have caught this error, but GNU as does not.

  C and Objective-C

     * The -Wstrict-aliasing=2 option has been added. This warning catches all
       unsafe cases, but it may also give a warning for some cases that are
       safe.
     * The     cast-as-lvalue,    conditional-expression-as-lvalue    and
       compound-expression-as-lvalue extensions, which were deprecated in 3.3.4
       and 3.4, have been removed.
     * The -fwritable-strings option, which was deprecated in 3.4, has been
       removed.
     * #pragma pack() semantics have been brought closer to those used by other
       compilers. This also applies to C++.
     * Taking the address of a variable with register storage is invalid in C.
       GCC now issues an error instead of a warning.
     * Arrays of incomplete element type are invalid in C. GCC now issues an
       error for such arrays. Declarations such as extern struct s x[]; (where
       struct s has not been defined) can be moved after the definition of
       struct s. Function parameters declared as arrays of incomplete type can
       instead be declared as pointers.

  C++

     * When compiling without optimizations (-O0), the C++ frontend is much
       faster than in any previous versions of GCC. Independent testers have
       measured speed-ups up to 25% in real-world production code, compared to
       the  3.4  family  (which was already the fastest version to date).
       Upgrading from older versions might show even bigger improvements.
     * ELF visibility attributes can now be applied to a class type, so that it
       affects every member function of a class at once, without having to
       specify each individually:
class __attribute__ ((visibility("hidden"))) Foo
{
   int foo1();
   void foo2();
};
       The syntax is deliberately similar to the __declspec() system used by
       Microsoft Windows based compilers, allowing cross-platform projects to
       easily  reuse their existing macro system for denoting exports and
       imports. By explicitly marking internal classes never used outside a
       binary as hidden, one can completely avoid PLT indirection overheads
       during their usage by the compiler. You can find out more about the
       advantages of this at [6]http://people.redhat.com/drepper/dsohowto.pdf
     * The -fvisibility-inlines-hidden option has been added which marks all
       inlineable functions as having hidden ELF visibility, thus removing
       their symbol and typeinfo from the exported symbol table of the output
       ELF binary. Using this option can reduce the exported symbol count of
       template-heavy  code by up to 40% with no code change at all, thus
       notably  improving link and load times for the binary as well as a
       reduction in size of up to 10%. Also, check the new [7]-fvisibility
       option.
     * The compiler now uses the library interface specified by the [8]C++ ABI
       for thread-safe initialization of function-scope static variables. Most
       users should leave this alone, but embedded programmers may want to
       disable this by specifying -fno-threadsafe-statics for a small savings
       in code size.
     * Taking  the  address of an explicit register variable is no longer
       supported. Note that C++ allows taking the address of variables with
       register storage so this will continue to compile with a warning. For
       example, assuming that r0 is a machine register:
register int foo asm ("r0");
register int bar;
&foo; // error, no longer accepted
&bar; // OK, with a warning
     * G++ has an undocumented extension to virtual function covariancy rules
       that  allowed  the  overrider to return a type that was implicitly
       convertable to the overridden function's return type. For instance a
       function returning void * could be overridden by a function returning T
       *. This is now deprecated and will be removed in a future release.
     * The G++ minimum and maximum operators (<? and >?) and their compound
       forms (<?=) and >?=) have been deprecated and will be removed in a
       future version. Code using these operators should be modified to use
       std::min and std::max instead.
     * Declaration  of  nested  classes of class templates as friends are
       supported:
template <typename T> struct A {
  class B {};
};
class C {
  template <typename T> friend class A<T>::B;
};
       This complements the feature member functions of class templates as
       friends introduced in GCC 3.4.0.
     * When declaring a friend class using an unqualified name, classes outside
       the innermost non-class scope are not searched:
class A;
namespace N {
  class B {
    friend class A;   // Refer to N::A which has not been declared yet
                      // because name outside namespace N are not searched
    friend class ::A; // Refer to ::A
  };
}
       Hiding the friend name until declaration is still not implemented.
     * Friends  of  classes defined outside their namespace are correctly
       handled:
namespace N {
  class A;
}
class N::A {
  friend class B; // Refer to N::B in GCC 4.0.0
                  // but ::B in earlier versions of GCC
};

    Runtime Library (libstdc++)

     * Optimization work:
          + Added efficient specializations of istream functions for char and
            wchar_t.
          + Further  performance  tuning  of  strings,  in particular wrt
            single-char append and getline.
          + iter_swap - and therefore most of the mutating algorithms - now
            makes an unqualified call to swap when the value_type of the two
            iterators is the same.
     * A large subset of the features in Technical Report 1 (TR1 for short) is
       experimentally delivered (i.e., no guarantees about the implementation
       are provided. In particular it is not promised that the library will
       remain link-compatible when code using TR1 is used):
          + General utilities such as reference_wrapper and shared_ptr.
          + Function objects, i.e., result_of, mem_fn, bind, function.
          + Support for metaprogramming.
          + New containers such as tuple, array, unordered_set, unordered_map,
            unordered_multiset, unordered_multimap.
     * As usual, many bugs have been fixed and LWG resolutions implemented for
       the first time (e.g., DR 409).

  Java

     * In order to prevent naming conflicts with other implementations of these
       tools, some GCJ binaries have been renamed:
          + rmic is now grmic,
          + rmiregistry is now grmiregistry, and
          + jar is now fastjar.
       In  particular,  these names were problematic for the jpackage.org
       packaging conventions which install symlinks in /usr/bin that point to
       the preferred versions of these tools.
     * The -findirect-dispatch argument to the compiler now works and generates
       code following a new "binary compatibility" ABI. Code compiled this way
       follows  the  binary  compatibility  rules  of  the  Java Language
       Specification.
     * libgcj now has support for using GCJ as a JIT, using the gnu.gcj.jit
       family of system properties.
     * libgcj can now find a shared library corresponding to the bytecode
       representation of a class. See the documentation for the new gcj-dbtool
       program, and the new gnu.gcj.precompiled.db.path system property.
     * There have been many improvements to the class library. Here are some
       highlights:
          + Much more of AWT and Swing exist.
          + Many   new   packages   and  classes  were  added,  including
            java.util.regex,          java.net.URI,         javax.crypto,
            javax.crypto.interfaces,     javax.crypto.spec,    javax.net,
            javax.net.ssl,javax.security.auth,javax.security.auth.callback,
            javax.security.auth.login,          javax.security.auth.x500,
            javax.security.sasl,       org.ietf.jgss,      javax.imageio,
            javax.imageio.event,      javax.imageio.spi,     javax.print,
            javax.print.attribute,        javax.print.attribute.standard,
            javax.print.event, and javax.xml
          + Updated SAX and DOM, and imported GNU JAXP

  Fortran

     * A new [9]Fortran front end has replaced the aging GNU Fortran 77 front
       end. The new front end supports Fortran 90 and Fortran 95. It may not
       yet be as stable as the old Fortran front end.

  Ada

     * Ada (with tasking and Zero Cost Exceptions) is now available on many
       more targets, including but not limited to: alpha-linux, hppa-hpux,
       hppa-linux, powerpc-darwin, powerpc-linux, s390-linux, s390x-linux,
       sparc-linux.
     * Some  of  the  new  Ada  2005  features  are  now implemented like
       Wide_Wide_Character and Ada.Containers.
     * Many bugs have been fixed, tools and documentation improved.
     * To compile Ada from the sources, install an older working Ada compiler
       and then use --enable-languages=ada at configuration time, since the Ada
       frontend is not currently activated by default. See the [10]Installing
       GCC for details.

New Targets and Target Specific Improvements

  H8/300

     * The frame layout has changed. In the new layout, the prologue of a
       function first saves registers and then allocate space for locals,
       resulting in an 1% improvement on code size.

  IA-32/x86-64 (AMD64)

     * The acos, asin, drem, exp10, exp2, expm1, fmod, ilogb, log10, log1p,
       log2, logb and tan mathematical builtins (and their float and long
       double variants) are now implemented as inline x87 intrinsics when using
       -ffast-math.
     * The ceil, floor, nearbyint, rint and trunc mathematical builtins (and
       their float and long double variants) are now implemented as inline x87
       intrinsics when using -ffast-math.
     * The x87's fsincos instruction is now used automatically with -ffast-math
       when calculating both the sin and cos of the same argument.
     * Instruction selection for multiplication and division by constants has
       been improved.

  IA-64

     * Floating point division, integer division and sqrt are now inlined,
       resulting in significant performance improvements on some codes.

  MIPS

     * Division  by  zero  checks now use conditional traps if the target
       processor  supports them. This decreases code size by one word per
       division operation. The old behavior (branch and break) can be obtained
       either at configure time by passing --with-divide=breaks to configure or
       at runtime by passing -mdivide-breaks to GCC.
     * Support for MIPS64 paired-single instructions has been added. It is
       enabled  by  -mpaired-single  and  can  be accessed using both the
       target-independent vector extensions and new MIPS-specific built-in
       functions.
     * Support for the MIPS-3D ASE has been added. It is enabled by -mips3d and
       provides new MIPS-3D-specific built-in functions.
     * The -mexplicit-relocs option now supports static n64 code (as is used,
       for example, in 64-bit linux kernels). -mexplicit-relocs should now be
       feature-complete and is enabled by default when GCC is configured to use
       a compatible assembler.
     * Support for the NEC VR4130 series has been added. This support includes
       the use of VR-specific instructions and a new VR4130 scheduler. Full
       VR4130 support can be selected with -march=vr4130 while code for any ISA
       can be tuned for the VR4130 using -mtune=vr4130. There is also a new
       -mvr4130-align option that produces better schedules at the cost of
       increased code size.
     * Support for the Broadcom SB-1 has been extended. There is now an SB-1
       scheduler  as  well as support for the SB-1-specific paired-single
       instructions. Full SB-1 support can be selected with -march=sb1 while
       code for any ISA can be optimized for the SB-1 using -mtune=sb1.
     * The compiler can now work around errata in R4000, R4400, VR4120 and
       VR4130  processors.  These workarounds are enabled by -mfix-r4000,
       -mfix-r4400, -mfix-vr4120 and -mfix-vr4130 respectively. The VR4120 and
       VR4130 workarounds need binutils 2.16 or above.
     * IRIX  shared libraries are now installed into the standard library
       directories: o32 libraries go into lib/, n32 libraries go into lib32/
       and n64 libraries go into lib64/.
     * The compiler supports a new -msym32 option. It can be used to optimize
       n64 code in which all symbols are known to have 32-bit values.

  S/390 and zSeries

     * New command line options help to generate code intended to run in an
       environment where stack space is restricted, e.g. Linux kernel code:
          + -mwarn-framesize and -mwarn-dynamicstack trigger compile-time
            warnings for single functions that require large or dynamic stack
            frames.
          + -mstack-size and -mstack-guard generate code that checks for stack
            overflow at run time.
          + -mpacked-stack generates code that reduces the stack frame size of
            many functions by reusing unneeded parts of the stack bias area.
     * The -msoft-float option now ensures that generated code never accesses
       floating point registers.
     * The s390x-ibm-tpf target now fully supports C++, including exceptions
       and threads.
     * Various changes to improve performance of the generated code have been
       implemented, including:
          + GCC now uses sibling calls where possible.
          + Condition code handling has been optimized, allowing GCC to omit
            redundant comparisons in certain cases.
          + The cost function guiding many optimizations has been refined to
            more accurately represent the z900 and z990 processors.
          + The  ADD  LOGICAL WITH CARRY and SUBTRACT LOGICAL WITH BORROW
            instructions are now used to avoid conditional branches in certain
            cases.
          + The back end now uses the LEGITIMIZE_RELOAD_ADDRESS feature to
            optimize address arithmetic required to access large stack frames.
          + GCC  now  makes  more  efficient use of memory-to-memory type
            instructions (MVC, CLC, ...).
          + More  precise  tracking of special register use allows better
            instruction scheduling, in particular of the function prologue and
            epilogue sequences.
          + The Java front end now generates inline code to implement integer
            division, instead of calling library routines.

  SPARC

     * The options -mv8, -msparclite, -mcypress, -msupersparc, -mf930 and
       -mf934 have been removed. They have been replaced with -mcpu=xxx.
     * The  internal  model  used  to  estimate the relative cost of each
       instruction has been updated. It is expected to give better results on
       recent UltraSPARC processors.
     * Code generation for function prologues and epilogues has been improved,
       resulting in better scheduling and allowing multiple exit points in
       functions.
     * Support for Sun's Visual Instruction Set (VIS) has been enhanced. It is
       enabled  by  -mvis  and  provides  new  built-in functions for VIS
       instructions on UltraSPARC processors.
     * The option -mapp-regs has been turned on by default on Solaris too.

  NetWare

     * Novell NetWare (on ix86, no other hardware platform was ever really
       supported by this OS) has been re-enabled and the ABI supported by GCC
       has been brought into sync with that of MetroWerks CodeWarrior (the ABI
       previously supported was that of some Unix systems, which NetWare never
       tried to support).

Obsolete Systems

   Support for a number of older systems has been declared obsolete in GCC 4.0.
   Unless there is activity to revive them, the next release of GCC will have
   their sources permanently removed.

   All GCC ports for the following processor architectures have been declared
   obsolete:
     * Intel i860
     * Ubicom IP2022
     * National Semiconductor NS32K
     * Texas Instruments TMS320C[34]x

   Also, those for some individual systems have been obsoleted:
     * SPARC family
          + SPARClite-based  systems  (sparclite-*-coff, sparclite-*-elf,
            sparc86x-*-elf)
          + OpenBSD 32-bit (sparc-*-openbsd*)

Documentation improvements

Other significant improvements

     * Location lists are now generated by default when compiling with debug
       info and optimization. Location lists provide more accurate debug info
       about locations of variables and they allow debugging code compiled with
       -fomit-frame-pointer.
     * The -fvisibility option has been added which allows the default ELF
       visibility of all symbols to be set per compilation and the new #pragma
       GCC visibility preprocessor command allows the setting of default ELF
       visibility for a region of code. Using -fvisibility=hidden especially in
       combination  with  the  new  -fvisibility-inlines-hidden can yield
       substantial improvements in output binary quality including avoiding PLT
       indirection overheads, reduction of the exported symbol count by up to
       60% (with resultant improvements to link and load times), better scope
       for the optimizer to improve code and up to a 20% reduction in binary
       size. Using these options correctly yields a binary with a similar
       symbol count to a Windows DLL.
       Perhaps more importantly, this new feature finally allows (with careful
       planning) complete avoidance of symbol clashes when manually loading
       shared objects with RTLD_GLOBAL, thus finally solving problems many
       projects such as python were forced to use RTLD_LOCAL for (with its
       resulting issues for C++ correctness). You can find more information
       about using these options at [11]http://gcc.gnu.org/wiki/Visibility.
     _________________________________________________________________

GCC 4.0.1

   This is the [12]list of problem reports (PRs) from GCC's bug tracking system
   that are known to be fixed in the 4.0.1 release. This list might not be
   complete (that is, it is possible that some PRs that have been fixed are not
   listed here).

GCC 4.0.2

   This is the [13]list of problem reports (PRs) from GCC's bug tracking system
   that are known to be fixed in the 4.0.2 release. This list might not be
   complete (that is, it is possible that some PRs that have been fixed are not
   listed here).

   Unfortunately, due to a release engineering failure, this release has a
   regression on Solaris that will affect some C++ programs. We suggest that
   Solaris users apply a [14]patch that corrects the problem. Users who do not
   wish  to  apply the patch should explicitly link C++ programs with the
   -pthreads option, even if they do not use threads. This problem has been
   corrected in the current 4.0 branch sources and will not be present in GCC
   4.0.3.

GCC 4.0.3

   Starting with this release, the function getcontext is recognized by the
   compiler as having the same semantics as the setjmp function. In particular,
   the compiler will ensure that all registers are dead before calling such a
   function and will emit a warning about the variables that may be clobbered
   after the second return from the function.

GCC 4.0.4

   This is the [15]list of problem reports (PRs) from GCC's bug tracking system
   that are known to be fixed in the 4.0.4 release. This list might not be
   complete (that is, it is possible that some PRs that have been fixed are not
   listed here).

   The 4.0.4 release is provided for those that require a high degree of binary
   compatibility with previous 4.0.x releases. For most users, the GCC team
   recommends that version 4.1.1 or later be used instead."

   Please send FSF & GNU inquiries & questions to [16]gnu@gnu.org. There are
   also [17]other ways to contact the FSF.

   These pages are maintained by [18]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [19]GCC manuals. If that fails, the [20]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [21]gcc@gnu.org or [22]gcc@gcc.gnu.org. All of
    our lists have [23]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2007-02-03 [24]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/gcc-4.0/changes.html#4.0.4
   2. http://www.cl.cam.ac.uk/~mgk25/ucs/quotes.html
   3. http://gcc.gnu.org/projects/tree-ssa/
   4. http://gcc.gnu.org/projects/tree-ssa/vectorization.html
   5. http://gcc.gnu.org/news/sms.html
   6. http://people.redhat.com/drepper/dsohowto.pdf
   7. http://gcc.gnu.org/gcc-4.0/changes.html#visibility
   8. http://www.codesourcery.com/cxx-abi/
   9. http://gcc.gnu.org/fortran/
  10. http://gcc.gnu.org/install/
  11. http://gcc.gnu.org/wiki/Visibility
  12. http://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=4.0.1
  13. http://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=4.0.2
  14. http://gcc.gnu.org/ml/gcc-cvs/2005-09/msg00984.html
  15. http://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=4.0.4
  16. mailto:gnu@gnu.org
  17. http://www.gnu.org/home.html#ContactInfo
  18. http://gcc.gnu.org/about.html
  19. http://gcc.gnu.org/onlinedocs/
  20. mailto:gcc-help@gcc.gnu.org
  21. mailto:gcc@gnu.org
  22. mailto:gcc@gcc.gnu.org
  23. http://gcc.gnu.org/lists.html
  24. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.4/index.html

                           GCC 3.4 Release Series

   May 26, 2006

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.4.6.

   This release is a bug-fix release, containing fixes for regressions in GCC
   3.4.4 relative to previous releases of GCC. This is the last of the 3.4.x
   series.

   The GCC 3.4 release series includes numerous [2]new features, improvements,
   bug fixes, and other changes, thanks to an [3]amazing group of volunteers.

Release History

   GCC 3.4.6
          March 6, 2006 ([4]changes)

   GCC 3.4.5
          November 30, 2005 ([5]changes)

   GCC 3.4.4
          May 18, 2005 ([6]changes)

   GCC 3.4.3
          November 4, 2004 ([7]changes)

   GCC 3.4.2
          September 6, 2004 ([8]changes)

   GCC 3.4.1
          July 1, 2004 ([9]changes)

   GCC 3.4.0
          April 18, 2004 ([10]changes)

References and Acknowledgements

   GCC used to stand for the GNU C Compiler, but since the compiler supports
   several other languages aside from C, it now stands for the GNU Compiler
   Collection.

   A  list of [11]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed new features, improvements, bug fixes, and other changes as well
   as test results to GCC. This [12]amazing group of volunteers is what makes
   GCC successful.

   For additional information about GCC please refer to the [13]GCC project web
   site or contact the [14]GCC development mailing list.

   To obtain GCC please use [15]our mirror sites, one of the [16]GNU mirror
   sites, or [17]our SVN server.

   Please send FSF & GNU inquiries & questions to [18]gnu@gnu.org. There are
   also [19]other ways to contact the FSF.

   These pages are maintained by [20]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [21]GCC manuals. If that fails, the [22]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [23]gcc@gnu.org or [24]gcc@gcc.gnu.org. All of
    our lists have [25]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [26]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://gcc.gnu.org/gcc-3.4/changes.html
   3. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   4. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.6
   5. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.5
   6. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.4
   7. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.3
   8. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.2
   9. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.1
  10. http://gcc.gnu.org/gcc-3.4/changes.html
  11. http://gcc.gnu.org/gcc-3.4/buildstat.html
  12. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
  13. http://gcc.gnu.org/index.html
  14. mailto:gcc@gcc.gnu.org
  15. http://gcc.gnu.org/mirrors.html
  16. http://www.gnu.org/order/ftp.html
  17. http://gcc.gnu.org/svn.html
  18. mailto:gnu@gnu.org
  19. http://www.gnu.org/home.html#ContactInfo
  20. http://gcc.gnu.org/about.html
  21. http://gcc.gnu.org/onlinedocs/
  22. mailto:gcc-help@gcc.gnu.org
  23. mailto:gcc@gnu.org
  24. mailto:gcc@gcc.gnu.org
  25. http://gcc.gnu.org/lists.html
  26. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.4/changes.html

                           GCC 3.4 Release Series
                      Changes, New Features, and Fixes

   The final release in the 3.4 release series is [1]GCC 3.4.6. The series is
   now closed.

   GCC 3.4 has [2]many improvements in the C++ frontend. Before reporting a
   bug, please make sure it's really GCC, and not your code, that is broken.

Caveats

     * GNU Make is now required to build GCC.
     * With -nostdinc the preprocessor used to ignore both standard include
       paths and include paths contained in environment variables. It was
       neither documented nor intended that environment variable paths be
       ignored, so this has been corrected.
     * GCC no longer accepts the options -fvolatile, -fvolatile-global and
       -fvolatile-static. It is unlikely that they worked correctly in any 3.x
       release.
     * GCC no longer ships <varargs.h>. Use <stdarg.h> instead.
     * Support for all the systems [3]obsoleted in GCC 3.3 has been removed
       from GCC 3.4. See below for a [4]list of systems which are obsoleted in
       this release.
     * GCC  now requires an ISO C90 (ANSI C89) C compiler to build. K&R C
       compilers will not work.
     * The implementation of the [5]MIPS ABIs has changed. As a result, the
       code generated for certain MIPS targets will not be binary compatible
       with earlier releases.
     * In previous releases, the MIPS port had a fake "hilo" register with the
       user-visible name accum. This register has been removed.
     * The implementation of the [6]SPARC ABIs has changed. As a result, the
       code generated will not be binary compatible with earlier releases in
       certain cases.
     * The configure option --enable-threads=pthreads has been removed; use
       --enable-threads=posix instead, which should have the same effect.
     * Code size estimates used by inlining heuristics for C, Objective-C, C++
       and Java have been redesigned significantly. As a result the parameters
       of  -finline-insns,  --param  max-inline-insns-single  and --param
       max-inline-insns-auto need to be reconsidered.
     * --param max-inline-slope and --param min-inline-insns have been removed;
       they are not needed for the new bottom-up inlining heuristics.
     * The new unit-at-a-time compilation scheme has several compatibility
       issues:
          + The  order  in  which functions, variables, and top-level asm
            statements are emitted may have changed. Code relying on some
            particular ordering needs to be updated. The majority of such
            top-level asm statements can be replaced by section attributes.
          + Unreferenced static variables and functions are removed. This may
            result in undefined references when an asm statement refers to the
            variable/function   directly.   In   that   case  either  the
            variable/function shall be listed in asm statement operand or in
            the case of top-level asm statements the attribute used shall be
            used to force function/variable to be always output and considered
            as a possibly used by unknown code.
            For variables the attribute is accepted only by GCC 3.4 and newer,
            while  for earlier versions it is sufficient to use unused to
            silence warnings about the variables not being referenced. To keep
            code  portable  across  different  GCC  versions, you can use
            appropriate preprocessor conditionals.
          + Static functions now can use non-standard passing conventions that
            may break asm statements calling functions directly. Again the
            attribute used shall be used to prevent this behavior.
       As a temporary workaround, -fno-unit-at-a-time can be used, but this
       scheme may not be supported by future releases of GCC.
     * GCC 3.4 automatically places zero-initialized variables in the .bss
       section on some operating systems. Versions of GNU Emacs up to (and
       including) 21.3 will not work correctly when using this optimization;
       you can use -fno-zero-initialized-in-bss to disable it.
     * If GCC 3.4 is configured with --enable-threads=posix (the default on
       most targets that support pthreads) then _REENTRANT will be defined
       unconditionally by some libstdc++ headers. C++ code which relies on that
       macro to detect whether multi-threaded code is being compiled might
       change  in  meaning,  possibly  resulting  in  linker  errors  for
       single-threaded programs. Affected users of [7]Boost should compile
       single-threaded code with -DBOOST_DISABLE_THREADS. See Bugzilla for
       [8]more information.

General Optimizer Improvements

     * Usability  of  the  profile feedback and coverage testing has been
       improved.
          + Performance  of profiled programs has been improved by faster
            profile merging code.
          + Better use of the profile feedback for optimization (loop unrolling
            and loop peeling).
          + File locking support allowing fork() calls and parallel runs of
            profiled programs.
          + Coverage file format has been redesigned.
          + gcov coverage tool has been improved.
          + make profiledbootstrap available to build a faster compiler.
            Experiments made on i386 hardware showed an 11% speedup on -O0 and
            a 7.5% speedup on -O2 compilation of a [9]large C++ testcase.
          + New value profiling pass enabled via -fprofile-values
          + New value profile transformations pass enabled via -fvpt aims to
            optimize some code sequences by exploiting knowledge about value
            ranges  or  other properties of the operands. At the moment a
            conversion of expensive divisions into cheaper operations has been
            implemented.
          + New -fprofile-generate and -fprofile-use command line options to
            simplify the use of profile feedback.
     * A new unit-at-a-time compilation scheme for C, Objective-C, C++ and Java
       which is enabled via -funit-at-a-time (and implied by -O2). In this
       scheme a whole file is parsed first and optimized later. The following
       basic inter-procedural optimizations are implemented:
          + Removal of unreachable functions and variables
          + Discovery of local functions (functions with static linkage whose
            address is never taken)
          + On i386, these local functions use register parameter passing
            conventions.
          + Reordering of functions in topological order of the call graph to
            enable better propagation of optimizing hints (such as the stack
            alignments needed by functions) in the back end.
          + Call graph based out-of-order inlining heuristics which allows to
            limit overall compilation unit growth (--param inline-unit-growth).
       Overall, the unit-at-a-time scheme produces a 1.3% improvement for the
       SPECint2000 benchmark on the i386 architecture (AMD Athlon CPU).
     * More realistic code size estimates used by inlining for C, Objective-C,
       C++ and Java. The growth of large functions can now be limited via
       --param large-function-insns and --param large-function-growth.
     * A new cfg-level loop optimizer pass replaces the old loop unrolling pass
       and  adds  two other loop transformations -- loop peeling and loop
       unswitching -- and also uses the profile feedback to limit code growth.
       (The three optimizations are enabled by -funroll-loops, -fpeel-loops and
       -funswitch-loops flags, respectively).
       The old loop unroller still can be enabled by -fold-unroll-loops and may
       produce  better  code  in  some cases, especially when the webizer
       optimization pass is not run.
     * A new web construction pass enabled via -fweb (and implied by -O3)
       improves the quality of register allocation, CSE, first scheduling pass
       and  some  other  optimization passes by avoiding re-use of pseudo
       registers with non-overlapping live ranges. The pass almost always
       improves code quality but does make debugging difficult and thus is not
       enabled by default by -O2
       The pass is especially effective as cleanup after code duplication
       passes, such as the loop unroller or the tracer.
     * Experimental implementations of superblock or trace scheduling in the
       second scheduling pass can be enabled via -fsched2-use-superblocks and
       -fsched2-use-traces, respectively.

New Languages and Language specific improvements

  Ada

     * The Ada front end has been updated to include numerous bug fixes and
       enhancements. These include:
          + Improved project file support
          + Additional set of warnings about potential wrong code
          + Improved error messages
          + Improved code generation
          + Improved cross reference information
          + Improved inlining
          + Better run-time check elimination
          + Better error recovery
          + More efficient implementation of unbounded strings
          + Added features in GNAT.Sockets, GNAT.OS_Lib, GNAT.Debug_Pools, ...
          + New GNAT.xxxx packages (e.g. GNAT.Strings, GNAT.Exception_Action)
          + New pragmas
          + New -gnatS switch replacing gnatpsta
          + Implementation of new Ada features (in particular limited with,
            limited aggregates)

  C/Objective-C/C++

     * Precompiled  headers  are  now  supported. Precompiled headers can
       dramatically speed up compilation of some projects. There are some known
       defects in the current precompiled header implementation that will
       result in compiler crashes in relatively rare situations. Therefore,
       precompiled headers should be considered a "technology preview" in this
       release.  Read the manual for details about how to use precompiled
       headers.
     * File handling in the preprocessor has been rewritten. GCC no longer gets
       confused by symlinks and hardlinks, and now has a correct implementation
       of #import and #pragma once. These two directives have therefore been
       un-deprecated.
     * The undocumented extension that allowed C programs to have a label at
       the end of a compound statement, which has been deprecated since GCC
       3.0, has been removed.
     * The cast-as-lvalue extension has been removed for C++ and deprecated for
       C and Objective-C. In particular, code like this:
        int i;
        (char) i = 5;

       or this:
        char *p;
        ((int *) p)++;

       is  no  longer accepted for C++ and will not be accepted for C and
       Objective-C in a future version.
     * The conditional-expression-as-lvalue extension has been deprecated for C
       and Objective-C. In particular, code like this:
        int a, b, c;
        (a ? b : c) = 2;

       will not be accepted for C and Objective-C in a future version.
     * The compound-expression-as-lvalue extension has been deprecated for C
       and Objective-C. In particular, code like this:
        int a, b;
        (a, b) = 2;

       will  not be accepted for C and Objective-C in a future version. A
       possible non-intrusive workaround is the following:
        (*(a, &b)) = 2;

     * Several [10]built-in functions such as __builtin_popcount for counting
       bits, finding the highest and lowest bit in a word, and parity have been
       added.
     * The -fwritable-strings option has been deprecated and will be removed.
     * Many  C math library functions are now recognized as built-ins and
       optimized.
     * The  C, C++, and Objective-C compilers can now handle source files
       written in any character encoding supported by the host C library. The
       default input character set is taken from the current locale, and may be
       overridden with the -finput-charset command line option. In the future
       we will add support for inline encoding markers.

  C++

     * G++ is now much closer to full conformance to the ISO/ANSI C++ standard.
       This means, among other things, that a lot of invalid constructs which
       used to be accepted in previous versions will now be rejected. It is
       very likely that existing C++ code will need to be fixed. This document
       lists some of the most common issues.
     * A  hand-written  recursive-descent  C++  parser  has  replaced the
       YACC-derived C++ parser from previous GCC releases. The new parser
       contains much improved infrastructure needed for better parsing of C++
       source  codes, handling of extensions, and clean separation (where
       possible) between proper semantics analysis and parsing. The new parser
       fixes many bugs that were found in the old parser.
     * You must now use the typename and template keywords to disambiguate
       dependent names, as required by the C++ standard.
        struct K {
          typedef int mytype_t;
        };

        template <class T1> struct A {
          template <class T2> struct B {
              void callme(void);
            };

          template <int N> void bar(void)
          {
            // Use 'typename' to tell the parser that T1::mytype_t names
            //  a type. This is needed because the name is dependent (in
            //  this case, on template parameter T1).
            typename T1::mytype_t x;
            x = 0;
          }
        };

        template <class T> void template_func(void)
        {
          // Use 'template' to prefix member templates within
          //  dependent types (a has type A<T>, which depends on
          //  the template parameter T).
          A<T> a;
          a.template bar<0>();

          // Use 'template' to tell the parser that B is a nested
          //  template class (dependent on template parameter T), and
          //  'typename' because the whole A<T>::B<int> is
          //  the name of a type (again, dependent).
          typename A<T>::template B<int> b;
          b.callme();
        }

        void non_template_func(void)
        {
          // Outside of any template class or function, no names can be
          //  dependent, so the use of the keyword 'typename' and 'template'
          //  is not needed (and actually forbidden).
          A<K> a;
          a.bar<0>();
          A<K>::B<float> b;
          b.callme();
        }
     * In a template definition, unqualified names will no longer find members
       of a dependent base (as specified by [temp.dep]/3 in the C++ standard).
       For example,
        template <typename T> struct B {
          int m;
          int n;
          int f ();
          int g ();
        };
        int n;
        int g ();
        template <typename T> struct C : B<T> {
          void h ()
          {
            m = 0; // error
            f ();  // error
            n = 0; // ::n is modified
            g ();  // ::g is called
          }
        };
       You must make the names dependent, e.g. by prefixing them with this->.
       Here is the corrected definition of C<T>::h,
        template <typename T> void C<T>::h ()
        {
          this->m = 0;
          this->f ();
          this->n = 0
          this->g ();
        }
       As an alternative solution (unfortunately not backwards compatible with
       GCC 3.3), you may use using declarations instead of this->:
        template <typename T> struct C : B<T> {
          using B<T>::m;
          using B<T>::f;
          using B<T>::n;
          using B<T>::g;
          void h ()
          {
            m = 0;
            f ();
            n = 0;
            g ();
          }
        };
     * In templates, all non-dependent names are now looked up and bound at
       definition time (while parsing the code), instead of later when the
       template is instantiated. For instance:
        void foo(int);

        template <int> struct A {
          static void bar(void){
            foo('a');
          }
        };

        void foo(char);

        int main()
        {
          A<0>::bar();    // Calls foo(int), used to call foo(char).
        }
             * In  an  explicit  instantiation  of a class template, you must use
       class or struct before the template-id:
        template <int N>
        class A {};

        template A<0>;         // error, not accepted anymore
        template class A<0>;   // OK
     * The "named return value" and "implicit typename" extensions have been
       removed.
     * Default arguments in function types have been deprecated and will be
       removed.
     * ARM-style name-injection of friend declarations has been deprecated and
       will be removed. For example: struct S { friend void f(); }; void g() {
       f();  }  will not be accepted by future versions of G++; instead a
       declaration of "f" will need to be present outside of the scope of "S".
     * Covariant returns are implemented for all but varadic functions that
       require an adjustment.
     * When -pedantic is used, G++ now issues errors about spurious semicolons.
       For example,
        namespace N {}; // Invalid semicolon.
        void f() {}; // Invalid semicolon.
     * G++ no longer accepts attributes for a declarator after the initializer
       associated with that declarator. For example,
        X x(1) __attribute__((...));
       is no longer accepted. Instead, use:
        X x __attribute__((...)) (1);
     * Inside the scope of a template class, the name of the class itself can
       be treated as either a class or a template. So GCC used to accept the
       class  name  as  argument  of type template, and template template
       parameter. However this is not C++ standard compliant. Now the name is
       not treated as a valid template template argument unless you qualify the
       name by its scope. For example, the code below no longer compiles.
        template <template <class> class TT> class X {};
        template <class T> class Y {
          X<Y> x; // Invalid, Y is always a type template parameter.
        };
       The valid code for the above example is
          X< ::Y> x; // Valid.
       (Notice the space between < and : to prevent GCC to interpret this as a
       digraph for [.)
     * Friend declarations that refer to template specializations are rejected
       if the template has not already been declared. For example,
        template <typename T>
        class C {
          friend void f<> (C&);
        };
       is rejected. You must first declare f as a template,
        template <typename T>
        void f(T);
     * In  case  of  friend  declarations,  every name used in the friend
       declaration  must  be accessible at the point of that declaration.
       Previous versions of G++ used to be less strict about this and allowed
       friend declarations for private class members, for example. See the ISO
       C++ Standard Committee's [11]defect report #209 for details.
     * Declaration  of member functions of class templates as friends are
       supported. For example,
        template <typename T> struct A {
          void f();
        };
        class C {
          template <typename T> friend void A<T>::f();
        };
     * You must use template <> to introduce template specializations, as
       required by the standard. For example,
        template <typename T>
        struct S;

        struct S<int> { };
       is rejected. You must write,
        template <> struct S<int> {};
     * G++ used to accept code like this,
        struct S {
          int h();
          void f(int i = g());
          int g(int i = h());
        };
       This behavior is not mandated by the standard. Now G++ issues an error
       about this code. To avoid the error, you must move the declaration of g
       before the declaration of f. The default arguments for g must be visible
       at the point where it is called.
     * The C++ ABI Section 3.3.3 specifications for the array construction
       routines __cxa_vec_new2 and __cxa_vec_new3 were changed to return NULL
       when the allocator argument returns NULL. These changes are incorporated
       into the libstdc++ runtime library.
     * Using a name introduced by a typedef in a friend declaration or in an
       explicit instantiation is now rejected, as specified by the ISO C++
       standard.
        class A;
        typedef A B;
        class C {
          friend class B;      // error, no typedef name here
          friend B;            // error, friend always needs class/struct/enum
          friend class A;      // OK
        };

        template <int> class Q {};
        typedef Q<0> R;
        template class R;      // error, no typedef name here
        template class Q<0>;   // OK
     * When  allocating an array with a new expression, GCC used to allow
       parentheses around the type name. This is actually ill-formed and it is
       now rejected:
        int* a = new (int)[10];    // error, not accepted anymore
        int* a = new int[10];      // OK
     * When  binding  an  rvalue  of  class type to a reference, the copy
       constructor of the class must be accessible. For instance, consider the
       following code:
        class A
        {
        public:
          A();

        private:
          A(const A&);   // private copy ctor
        };

        A makeA(void);
        void foo(const A&);

        void bar(void)
        {
          foo(A());       // error, copy ctor is not accessible
          foo(makeA());   // error, copy ctor is not accessible

          A a1;
          foo(a1);        // OK, a1 is a lvalue
        }
       This might be surprising at first sight, especially since most popular
       compilers do not correctly implement this rule ([12]further details).
     * When forming a pointer to member or a pointer to member function, access
       checks  for  class visibility (public, protected, private) are now
       performed using the qualifying scope of the name itself. This is better
       explained with an example:
        class A
        {
        public:
          void pub_func();
        protected:
          void prot_func();
        private:
          void priv_func();
        };

        class B : public A
        {
        public:
          void foo()
          {
            &A::pub_func;   // OK, pub_func is accessible through A
            &A::prot_func;  // error, cannot access prot_func through A
            &A::priv_func;  // error, cannot access priv_func through A

            &B::pub_func;   // OK, pub_func is accessible through B
            &B::prot_func;  // OK, can access prot_func through B (within B)
            &B::priv_func;  // error, cannot access priv_func through B
          }
        };

    Runtime Library (libstdc++)

     * Optimization work:
          + Streamlined streambuf, filebuf, separate synched with C Standard
            I/O streambuf.
          + All formatted I/O now uses cached locale information.
          + STL optimizations (memory/speed for list, red-black trees as used
            by sets and maps).
          + More use of GCC builtins.
          + String      optimizations      (avoid      contention      on
            increment/decrement-and-test  of  the  reference count in the
            empty-string object, constructor from input_iterators speedup).
     * Static linkage size reductions.
     * Large File Support (files larger than 2 GB on 32-bit systems).
     * Wide character and variable encoding filebuf work (UTF-8, Unicode).
     * Generic character traits.
     * Also support wchar_t specializations on Mac OS 10.3.x, FreeBSD 5.x,
       Solaris 2.7 and above, AIX 5.x, Irix 6.5.
     * The allocator class is now standard-conformant, and two additional
       extension allocators have been added, mt_alloc and bitmap_allocator.
     * PCH support: -include bits/stdc++.h (2x compile speedup).
     * Rewrote __cxa_demangle with support for C++ style allocators.
     * New debug modes for STL containers and iterators.
     * Testsuite  rewrite:  five  times  as many tests, plus increasingly
       sophisticated tests, including I/O, MT, multi-locale, wide and narrow
       characters.
     * Use current versions of GNU "autotools" for build/configuration.

  Objective-C

     * The Objective-C front end has been updated to include the numerous bug
       fixes and enhancements previously available only in Apple's version of
       GCC. These include:
          + Structured exception (@try... @catch... @finally, @throw) and
            synchronization (@synchronized) support. These are accessible via
            the -fobjc-exceptions switch; as of this writing, they may only be
            used in conjunction with -fnext-runtime on Mac OS X 10.3 and later.
            See  [13]Options  Controlling  Objective-C  Dialect  for more
            information.
          + An overhaul of @encode logic. The C99 _Bool and C++ bool type may
            now  be  encoded  as  'B'.  In addition, the back-end/codegen
            dependencies have been removed.
          + An overhaul of message dispatch construction, ensuring that the
            various receiver types (and casts thereof) are handled properly,
            and that correct diagnostics are issued.
          + Support  for "Zero-Link" (-fzero-link) and "Fix-and-Continue"
            (-freplace-objc-classes) debugging modes, currently available on
            Mac OS X 10.3 and later. See [14]Options Controlling Objective-C
            Dialect for more information.
          + Access to optimized runtime entry points (-fno-nil-receivers ) on
            the  assumption that message receivers are never nil. This is
            currently available on Mac OS X 10.3 and later. See [15]Options
            Controlling Objective-C Dialect for more information.

  Java

     * Compiling  a  .jar  file  will  now cause non-.class entries to be
       automatically compiled as resources.
     * libgcj has been ported to Darwin.
     * Jeff Sturm has adapted Jan Hubicka's call graph optimization code to
       gcj.
     * libgcj has a new gcjlib URL type; this lets URLClassLoader load code
       from shared libraries.
     * libgcj has been much more completely merged with [16]GNU Classpath.
     * Class loading is now much more correct; in particular the caller's class
       loader is now used when that is required.
     * [17]Eclipse 2.x will run out of the box using gij.
     * Parts of java.nio have been implemented. Direct and indirect buffers
       work, as do fundamental file and socket operations.
     * java.awt has been improved, though it is still not ready for general
       use.
     * The HTTP protocol handler now uses HTTP/1.1 and can handle the POST
       method.
     * The MinGW port has matured. Enhancements include socket timeout support,
       thread interruption, improved Runtime.exec() handling and support for
       accented characters in filenames.

  Fortran

     * Fortran improvements are listed in the [18]Fortran documentation.

New Targets and Target Specific Improvements

  Alpha

     * Several   [19]built-in   functions   have   been   added  such  as
       __builtin_alpha_zap to allow utilizing the more obscure instructions of
       the CPU.
     * Parameter passing of complex arguments has changed to match the [20]ABI.
       This change is incompatible with previous GCC versions, but does fix
       compatibility with the Tru64 compiler and several corner cases where GCC
       was incompatible with itself.

  ARM

     * Nicolas Pitre has contributed his hand-coded floating-point support code
       for ARM. It is both significantly smaller and faster than the existing
       C-based implementation, even when building applications for Thumb. The
       arm-elf configuration has been converted to use the new code.
     * Support for the Intel's iWMMXt architecture, a second generation XScale
       processor, has been added. Enabled at run time with the -mcpu=iwmmxt
       command line switch.
     * A new ARM target has been added: arm-wince-pe. This is similar to the
       arm-pe target, but it defaults to using the APCS32 ABI.
     * The existing ARM pipeline description has been converted to the use the
       [21]DFA processor pipeline model. There is not much change in code
       performance, but the description is now [22]easier to understand.
     * Support for the Cirrus EP9312 Maverick floating point co-processor
       added. Enabled at run time with the -mcpu=ep9312 command line switch.
       Note however that the multilibs to support this chip are currently
       disabled in gcc/config/arm/t-arm-elf, so if you want to enable their
       production you will have to uncomment the entries in that file.

  H8/300

     * Support for long long has been added.
     * Support for saveall attribute has been added.
     * Pavel Pisa contributed hand-written 32-bit-by-32-bit division code for
       H8/300H and H8S, which is much faster than the previous implementation.
     * A lot of small performance improvements.

  IA-32/AMD64 (x86-64)

     * Tuning for K8 (AMD Opteron/Athlon64) core is available via -march=k8 and
       -mcpu=k8.
     * Scalar SSE code generation carefully avoids reformatting penalties,
       hidden dependencies and minimizes the number of uops generated on both
       Intel and AMD CPUs.
     * Vector MMX and SSE operands are now passed in registers to improve
       performance and match the argument passing convention used by the Intel
       C++ Compiler. As a result it is not possible to call functions accepting
       vector arguments compiled by older GCC version.
     * Conditional jump elimination is now more aggressive on modern CPUs.
     * The Athlon ports has been converted to use the DFA processor pipeline
       description.
     * Optimization of indirect tail calls is now possible in a similar fashion
       as direct sibcall optimization.
     * Further small performance improvements.
     * -m128bit-long-double is now less buggy.
     * __float128 support in 64-bit compilation.
     * Support for data structures exceeding 2GB in 64-bit mode.
     * -mcpu has been renamed to -mtune.

  IA-64

     * Tuning code for the Itanium 2 processor has been added. The generation
       of code tuned for Itanium 2 (option -mtune=itanium2) is enabled by
       default  now.  To  generate  code  tuned  for Itanium 1 the option
       -mtune=itanium1 should be used.
     * [23]DFA processor pipeline descriptions for the IA-64 processors have
       been added. This resulted in about 3% improvement on the SPECInt2000
       benchmark for Itanium 2.
     * Instruction bundling for the IA-64 processors has been rewritten using
       the DFA pipeline hazard recognizer. It resulted in about 60% compiler
       speedup on the SPECInt2000 C programs.

  M32R

     * Support for the M32R/2 processor has been added by Renesas.
     * Support for an M32R Linux target and PIC code generation has been added
       by Renesas.

  M68000

     * Bernardo Innocenti (Develer S.r.l.) has contributed the m68k-uclinux
       target, based on former work done by Paul Dale (SnapGear Inc.). Code
       generation for the ColdFire processors family has been enhanced and
       extended to support the MCF 53xx and MCF 54xx cores, integrating former
       work done by Peter Barada (Motorola).

  MIPS

    Processor-specific changes

     * Support for the RM7000 and RM9000 processors has been added. It can be
       selected using the -march compiler option and should work with any MIPS
       I (mips-*) or MIPS III (mips64-*) configuration.
     * Support for revision 2 of the MIPS32 ISA has been added. It can be
       selected with the command-line option -march=mips32r2.
     * There is a new option, -mfix-sb1, to work around certain SB-1 errata.

    Configuration

     * It is possible to customize GCC using the following configure-time
       options:
          + --with-arch,  which specifies the default value of the -march
            option.
          + --with-tune,  which specifies the default value of the -mtune
            option.
          + --with-abi, which specifies the default ABI.
          + --with-float=soft, which tells GCC to use software floating point
            by default.
          + --with-float=hard, which tells GCC to use hardware floating point
            by default.
     * A 64-bit GNU/Linux port has been added. The associated configurations
       are mips64-linux-gnu and mips64el-linux-gnu.
     * The 32-bit GNU/Linux port now supports Java.
     * The IRIX 6 configuration now supports the o32 ABI and will build o32
       multilibs by default. This support is compatible with both binutils and
       the SGI tools, but note that several features, including debugging
       information and DWARF2 exception handling, are only available when using
       the GNU assembler. Use of the GNU assembler and linker (version 2.15 or
       above) is strongly recommended.
     * The IRIX 6 configuration now supports 128-bit long doubles.
     * There  are  two  new RTEMS-specific configurations, mips-rtems and
       mipsel-rtems.
     * There  are  two  new  *-elf  configurations,  mipsisa32r2-elf  and
       mipsisa32r2el-elf.

    General

     * Several [24]ABI bugs have been fixed. Unfortunately, these changes will
       break binary compatibility with earlier releases.
     * GCC can now use explicit relocation operators when generating -mabicalls
       code. This behavior is controlled by -mexplicit-relocs and can have
       several performance benefits. For example:
          + It allows for more optimization of GOT accesses, including better
            scheduling and redundancy elimination.
          + It allows sibling calls to be implemented as jumps.
          + n32 and n64 leaf functions can use a call-clobbered global pointer
            instead of $28.
          + The code to set up $gp can be removed from functions that don't
            need it.
     * A new option, -mxgot, allows the GOT to be bigger than 64k. This option
       is equivalent to the assembler's -xgot option and should be used instead
       of -Wa,-xgot.
     * Frame pointer elimination is now supported when generating 64-bit MIPS16
       code.
     * Inline block moves have been optimized to take more account of alignment
       information.
     * Many internal changes have been made to the MIPS port, mostly aimed at
       reducing the reliance on assembler macros.

  PowerPC

     * GCC  3.4 releases have a number of fixes for PowerPC and PowerPC64
       [25]ABI incompatibilities regarding the way parameters are passed during
       functions calls. These changes may result in incompatibility between
       code compiled with GCC 3.3 and GCC 3.4.

    PowerPC Darwin

     * Support for shared/dylib gcc libraries has been added. It is enabled by
       default on powerpc-apple-darwin7.0.0 and up.
     * Libgcj   is   enabled   by   default.   On   systems   older  than
       powerpc-apple-darwin7.0.0 you need to install [26]dlcompat.
     * 128-bit IBM extended precision format support added for long double.

    PowerPC64 GNU/Linux

     * By default, PowerPC64 GNU/Linux now uses natural alignment of structure
       elements. The old four byte alignment for double, with special rules for
       a struct starting with a double, can be chosen with -malign-power. This
       change may result in incompatibility between code compiled with GCC 3.3
       and GCC 3.4.
     * -mabi=altivec is now the default rather than -mabi=no-altivec.
     * 128-bit IBM extended precision format support added for long double.

  S/390 and zSeries

     * New  command-line  options allow to specify the intended execution
       environment for generated code:
          + -mesa/-mzarch allows to specify whether to generate code running in
            ESA/390 mode or in z/Architecture mode (this is applicable to
            31-bit code only).
          + -march allows to specify a minimum processor architecture level
            (g5, g6, z900, or z990).
          + -mtune allows to specify which processor to tune for.
     * It is possible to customize GCC using the following configure-time
       options:
          + --with-mode, which specifies whether to default to assuming ESA/390
            or z/Architecture mode.
          + --with-arch,  which specifies the default value of the -march
            option.
          + --with-tune,  which specifies the default value of the -mtune
            option.
     * Support for the z990 processor has been added, and can be selected using
       -march=z990 or -mtune=z990. This includes instruction scheduling tuned
       for the superscalar instruction pipeline of the z990 processor as well
       as support for all new instructions provided by the long-displacement
       facility.
     * Support  to  generate 31-bit code optimized for zSeries processors
       (running in ESA/390 or in z/Architecture mode) has been added. This can
       be selected using -march=z900 and -mzarch respectively.
     * Instruction scheduling for the z900 and z990 processors now uses the DFA
       pipeline hazard recognizer.
     * GCC no longer generates code to maintain a stack backchain, previously
       used to generate stack backtraces for debugging purposes. As replacement
       that does not incur runtime overhead, DWARF-2 call frame information is
       provided by GCC; this is supported by GDB 6.1. The old behavior can be
       restored using the -mbackchain option.
     * The stack frame size of functions may now exceed 2 GB in 64-bit code.
     * A port for the 64-bit IBM TPF operating system has been added; the
       configuration is s390x-ibm-tpf. This configuration is supported as
       cross-compilation target only.
     * Various changes to improve the generated code have been implemented,
       including:
          + GCC  now  uses the MULTIPLY AND ADD and MULTIPLY AND SUBTRACT
            instructions  to  significantly  speed up many floating-point
            applications.
          + GCC now uses the ADD LOGICAL WITH CARRY and SUBTRACT LOGICAL WITH
            BORROW instructions to speed up long long arithmetic.
          + GCC now uses the SEARCH STRING instruction to implement strlen().
          + In many cases, function call overhead for 31-bit code has been
            reduced by placing the literal pool after the function code instead
            of after the function prolog.
          + Register 14 is no longer reserved in 64-bit code.
          + Handling of global register variables has been improved.

  SPARC

     * The option -mflat is deprecated.
     * Support for large (> 2GB) frames has been added to the 64-bit port.
     * Several [27]ABI bugs have been fixed. Unfortunately, these changes will
       break binary compatibility with earlier releases.
     * The default debugging format has been switched from STABS to DWARF-2 for
       32-bit code on Solaris 7 and later. DWARF-2 is already the default
       debugging format for 64-bit code on Solaris.

  SuperH

     * Support for the SH2E processor has been added. Enabled at run time with
       the -m2e command line switch, or at configure time by specifying sh2e as
       the machine part of the target triple.

  V850

     * Support for the Mitsubishi V850E1 processor has been added. This is a
       variant  of  the  V850E  processor  with some additional debugging
       instructions.

  Xtensa

     * Several ABI bugs have been fixed. Unfortunately, these changes break
       binary compatibility with earlier releases.
          + For big-endian processors, the padding of aggregate return values
            larger than a word has changed. If the size of an aggregate return
            value  is not a multiple of 32 bits, previous versions of GCC
            inserted padding in the most-significant bytes of the first return
            value register. Aggregates larger than a word are now padded in the
            least-significant bytes of the last return value register used.
            Aggregates  smaller  than  a  word  are  still  padded in the
            most-significant bytes. The return value padding has not changed
            for little-endian processors.
          + Function arguments with 16-byte alignment are now properly aligned.
          + The implementation of the va_list type has changed. A va_list value
            created by va_start from a previous release cannot be used with
            va_arg from this release, or vice versa.
     * More  processor  configuration  options  for Xtensa processors are
       supported:
          + the ABS instruction is now optional;
          + the ADDX* and SUBX* instructions are now optional;
          + an experimental CONST16 instruction can be used to synthesize
            constants instead of loading them from constant pools.
       These and other Xtensa processor configuration options can no longer be
       enabled or disabled by command-line options; the processor configuration
       must be specified by the xtensa-config.h header file when building GCC.
       Additionally, the -mno-serialize-volatile option is no longer supported.

Obsolete Systems

   Support for a number of older systems has been declared obsolete in GCC 3.4.
   Unless there is activity to revive them, the next release of GCC will have
   their sources permanently removed.

   All  configurations of the following processor architectures have been
   declared obsolete:
     * Mitsubishi D30V, d30v-*
     * AT&T DSP1600 and DSP1610, dsp16xx-*
     * Intel 80960, i960

   Also, some individual systems have been obsoleted:
     * ARM Family
          + Support  for  generating  code  for operation in APCS/26 mode
            (-mapcs-26).
     * IBM ESA/390
          + "Bigfoot"  port, i370-*. (The other port, s390-*, is actively
            maintained and supported.)
     * Intel 386 family
          + MOSS, i?86-moss-msdos and i?86-*-moss*
          + NCR 3000 running System V r.4, i?86-ncr-sysv4*
          + FreeBSD  with  a.out  object format, i?86-*-freebsd*aout* and
            i?86-*-freebsd2*
          + Linux with a.out object format, i?86-linux*aout*
          + Linux with libc5, a.k.a. glibc1, i?86-linux*libc1*
          + Interix versions before Interix 3, i?86-*-interix
          + Mach microkernel, i?86-mach*
          + SCO UnixWare with UDK, i?86-*-udk*
          + Generic System V releases 1, 2, and 3, i?86-*-sysv[123]*
          + VSTa microkernel, i386-*-vsta
     * Motorola M68000 family
          + HPUX, m68k-hp-hpux* and m68000-hp-hpux*
          + NetBSD   with   a.out  object  format  (before  NetBSD  1.4),
            m68k-*-*-netbsd* except m68k-*-*-netbsdelf*
          + Generic System V r.4, m68k-*-sysv4*
     * VAX
          + Generic  VAX,  vax-*-* (This is generic VAX only; we have not
            obsoleted any VAX triples for specific operating systems.)

Documentation improvements

Other significant improvements

     * The  build  system  has  undergone  several  significant cleanups.
       Subdirectories will only be configured if they are being built, and all
       subdirectory configures are run from the make command. The top level has
       been autoconfiscated.
     * Building GCC no longer writes to its source directory. This should help
       those wishing to share a read-only source directory over NFS or build
       from a CD. The exceptions to this feature are if you configure with
       either --enable-maintainer-mode or --enable-generated-files-in-srcdir.
     * The -W warning option has been renamed to -Wextra, which is more easily
       understood.  The  older  spelling  will  be retained for backwards
       compatibility.
     * Substantial improvements in compile time have been made, particularly
       for non-optimizing compilations.
     _________________________________________________________________

GCC 3.4.0

  Bug Fixes

   A  vast number of bugs have been fixed in 3.4.0, too many to publish a
   complete list here. [28]Follow this link to query the Bugzilla database for
   the list of over 900 bugs fixed in 3.4.0. This is the list of all bugs
   marked  as  resolved  and  fixed  in 3.4.0 that are not flagged as 3.4
   regressions.
     _________________________________________________________________

GCC 3.4.1

  Bug Fixes

   This section lists the problem reports (PRs) from GCC's bug tracking system
   that are known to be fixed in the 3.4.1 release. This list might not be
   complete (that is, it is possible that some PRs that have been fixed are not
   listed here).

    Bootstrap failures

     * [29]10129 Ada bootstrap fails on PPC-Darwin - invalid assembler emitted
       - PIC related
     * [30]14576 [ARM] ICE in libiberty when building gcc-3.4 for arm-elf
     * [31]14760 A bug in configure.in prevents using both --program-suffix and
       --program-prefix
     * [32]14671 [hppa64] bootstrap fails: ICE in save_call_clobbered_regs, in
       caller_save.c
     * [33]15093 [alpha][Java] make bootstrap fails to configure libffi on
       Alpha
     * [34]15178 Solaris 9/x86 fails linking after stage 3

    Multi-platform internal compiler errors (ICEs)

     * [35]12753 (preprocessor) Memory corruption in preprocessor on bad input
     * [36]13985 ICE in gcc.c-torture/compile/930621-1.c
     * [37]14810  (c++)  tree  check failures with invalid code involving
       templates
     * [38]14883  (c++) ICE on invalid code, in cp_parser_lookup_name, in
       cp/parser.c
     * [39]15044 (c++) ICE on syntax error, template header
     * [40]15057 (c++) Compiling of conditional value throw constructs cause a
       segmentation violation
     * [41]15064 (c++) typeid of template parameter gives ICE
     * [42]15142 (c++) ICE when passing a string where a char* is expected in a
       throw statement
     * [43]15159 ICE in rtl_verify_flow_info_1
     * [44]15165 (c++) ICE in instantiate_template
     * [45]15193 Unary minus using pointer to V4SF vector causes -fforce-mem to
       exhaust all memory
     * [46]15209 (c++) Runs out of memory with packed structs
     * [47]15227 (c++) Trouble with invalid function definition
     * [48]15285 (c++) instantiate_type ICE when forming pointer to template
       function
     * [49]15299 (c++) ICE in resolve_overloaded_unification
     * [50]15329 (c++) ICE on constructor of member template
     * [51]15550 ICE in extract_insn, in recog.c
     * [52]15554 (c++) ICE in tsubst_copy, in cp/pt.c
     * [53]15640 (c++) ICE on invalid code in arg_assoc, in cp/name-lookup.c
     * [54]15666 [unit-at-a-time] Gcc abort on valid code
     * [55]15696 (c++) ICE with bad pointer-to-member code
     * [56]15701 (c++) ICE with friends and template template parameter
     * [57]15761 ICE in do_SUBST, in combine.c
     * [58]15829 (c++) ICE on Botan-1.3.13 due to -funroll-loops

    Ada

     * [59]14538 All RTEMS targets broken for gnat

    C front end

     * [60]12391 missing warning about assigning to an incomplete type
     * [61]14649 atan(1.0) should not be a constant expression
     * [62]15004 [unit-at-a-time] no warning for unused paramater in static
       function
     * [63]15749 --pedantic-errors behaves differently from --pedantic with
       C-compiler on GNU/Linux

    C++ compiler and library

     * [64]10646 non-const reference is incorrectly matched in a "const T"
       partial specialization
     * [65]12077 wcin.rdbuf()->in_avail() return value too high
     * [66]13598 enc_filebuf doesn't work
     * [67]14211 const_cast returns lvalue but should be rvalue
     * [68]14220 num_put::do_put() undesired float/double behavior
     * [69]14245 problem with user-defined allocators in std::basic_string
     * [70]14340  libstdc++  Debug  mode:  failure to convert iterator to
       const_iterator
     * [71]14600 __gnu_cxx::stdio_sync_filebuf should expose internal FILE*
     * [72]14668 no warning anymore for reevaluation of declaration
     * [73]14775 LFS (large file support) tests missing
     * [74]14821 Duplicate namespace alias declaration should not conflict
     * [75]14930 Friend declaration ignored
     * [76]14932 cannot use offsetof to get offsets of array elements in g++
       3.4.0
     * [77]14950 [non unit-at-a-time] always_inline does not mix with templates
       and -O0
     * [78]14962 g++ ignores #pragma redefine_extname
     * [79]14975 Segfault on low-level write error during imbue
     * [80]15002 Linewise stream input is unusably slow (std::string slow)
     * [81]15025 compiler accepts redeclaration of template as non-template
     * [82]15046 [arm] Math functions misdetected by cross configuration
     * [83]15069 a bit test on a variable of enum type is miscompiled
     * [84]15074 g++ -lsupc++ still links against libstdc++
     * [85]15083 spurious "statement has no effect" warning
     * [86]15096 parse error with templates and pointer to const member
     * [87]15287 combination of operator[] and operator .* fails in templates
     * [88]15317 __attribute__ unused in first parameter of constructor gives
       error
     * [89]15337 sizeof on incomplete type diagnostic
     * [90]15361 bitset<>::_Find_next fails
     * [91]15412  _GLIBCXX_ symbols symbols defined and used in different
       namespaces
     * [92]15427 valid code results in incomplete type error
     * [93]15471 Incorrect member pointer offsets in anonymous structs/unions
     * [94]15503 nested template problem
     * [95]15507 compiler hangs while laying out union
     * [96]15542 operator & and template definitions
     * [97]15565 SLES9: leading + sign for unsigned int with showpos
     * [98]15625 friend defined inside a template fails to find static function
     * [99]15629 Function templates, overloads, and friend name injection
     * [100]15742 'noreturn' attribute ignored in method of template functions.
     * [101]15775 Allocator::pointer consistently ignored
     * [102]15821 Duplicate namespace alias within namespace rejected
     * [103]15862 'enum yn' fails (confict with undeclared builtin)
     * [104]15875 rejects pointer to member in template
     * [105]15877 valid code using templates and anonymous enums is rejected
     * [106]15947 Puzzling error message for wrong destructor declaration in
       template class
     * [107]16020 cannot copy __gnu_debug::bitset
     * [108]16154 input iterator concept too restrictive
     * [109]16174 deducing top-level consts

    Java

     * [110]14315 Java compiler is not parallel make safe

    Fortran

     * [111]15151 [g77] incorrect logical i/o in 64-bit mode

    Objective-C

     * [112]7993 private variables cannot be shadowed in subclasses

    Optimization bugs

     * [113]15228 useless copies of floating point operands
     * [114]15345 [non-unit-at-a-time] unreferenced nested inline functions not
       optimized away
     * [115]15945 Incorrect floating point optimization
     * [116]15526 ftrapv aborts on 0 * (-1)
     * [117]14690 Miscompiled POOMA tests
     * [118]15112 GCC generates code to write to unchanging memory

    Preprocessor

     * [119]15067 Minor glitch in the source of cpp

    Main driver program bugs

     * [120]1963    collect2   interprets   -oldstyle_liblookup   as   -o
       ldstyle_liblookup

    x86-specific (Intel/AMD)

     * [121]15717 Error: can't resolve `L0' {*ABS* section} - `xx' {*UND*
       section}

    HPPA-specific

     * [122]14782 GCC produces an unaligned data access at -O2
     * [123]14828 FAIL: gcc.c-torture/execute/20030408-1.c execution, -O2
     * [124]15202 ICE in reload_cse_simplify_operands, in postreload.c

    IA64-specific

     * [125]14610 __float80 constants incorrectly emitted
     * [126]14813 init_array sections are initialized in the wrong order
     * [127]14857 GCC segfault on duplicated asm statement
     * [128]15598 Gcc 3.4 ICE on valid code
     * [129]15653 Gcc 3.4 ICE on valid code

    MIPS-specific

     * [130]15189  wrong  filling  of  delay  slot  with -march=mips1 -G0
       -mno-split-addresses -mno-explicit-relocs
     * [131]15331 Assembler error building gnatlib on IRIX 6.5 with GNU as
       2.14.91
     * [132]16144 Bogus reference to __divdf3 when -O1
     * [133]16176 Miscompilation of unaligned data in MIPS backend

    PowerPC-specific

     * [134]11591 ICE in gcc.dg/altivec-5.c
     * [135]12028 powerpc-eabispe produces bad sCOND operation
     * [136]14478 rs6000 geu/ltu patterns generate incorrect code
     * [137]14567 long double and va_arg complex args
     * [138]14715 Altivec stack layout may overlap gpr save with stack temps
     * [139]14902 (libstdc++) Stream checking functions fail when -pthread
       option is used.
     * [140]14924 Compiler ICE on valid code
     * [141]14960 -maltivec affects vector return with -mabi=no-altivec
     * [142]15106 vector varargs failure passing from altivec to non-altivec
       code for -m32
     * [143]16026 ICE in function.c:4804, assign_parms, when -mpowerpc64 &
       half-word operation
     * [144]15191 -maltivec -mabi=no-altivec results in mis-aligned lvx and
       stvx
     * [145]15662 Segmentation fault when an exception is thrown - even if try
       and catch are specified

    s390-specific

     * [146]15054 Bad code due to overlapping stack temporaries

    SPARC-specific

     * [147]15783 ICE with union assignment in 64-bit mode
     * [148]15626 GCC 3.4 emits "ld: warning: relocation error: R_SPARC_UA32"

    x86-64-specific

     * [149]14326 boehm-gc hardcodes to 3DNow! prefetch for x86_64
     * [150]14723 Backported -march=nocona from mainline
     * [151]15290 __float128 failed to pass to function properly

    Cygwin/Mingw32-specific

     * [152]15250 Option -mms-bitfields support on GCC 3.4 is not conformant to
       MS layout
     * [153]15551 -mtune=pentium4 -O2 with sjlj EH breaks stack probe worker on
       windows32 targets

    Bugs specific to embedded processors

     * [154]8309 [m68k] -m5200 produces erroneous SImode set of short varaible
       on stack
     * [155]13250 [SH] Gcc code for rotation clobbers the register, but gcc
       continues to use the register as if it was not clobbered
     * [156]13803 [coldfire] movqi operand constraints too restrictivefor
       TARGET_COLDFIRE
     * [157]14093 [SH] ICE for code when using -mhitachi option in SH
     * [158]14457 [m6811hc] ICE with simple c++ source
     * [159]14542 [m6811hc] ICE on simple source
     * [160]15100 [SH] cc1plus got hang-up on
       libstdc++-v3/testsuite/abi_check.cc
     * [161]15296 [CRIS] Delayed branch scheduling causing invalid code on
       cris-*
     * [162]15396 [SH] ICE with -O2 -fPIC
     * [163]15782 [coldfire] m68k_output_mi_thunk emits wrong code for ColdFire

    Testsuite problems (compiler not affected)

     * [164]11610 libstdc++ testcases 27_io/* don't work properly remotely
     * [165]15488  (libstdc++) possibly insufficient file permissions for
       executing test suite
     * [166]15489 (libstdc++) testsuite_files determined incorrectly

    Documentation bugs

     * [167]13928 (libstdc++) no whatis info in some man pages generated by
       doxygen
     * [168]14150 Ada documentation out of date
     * [169]14949 (c++) Need to document method visibility changes
     * [170]15123 libstdc++-doc: Allocators.3 manpage is empty
     _________________________________________________________________

GCC 3.4.2

  Bug Fixes

   This section lists the problem reports (PRs) from GCC's bug tracking system
   that are known to be fixed in the 3.4.2 release. This list might not be
   complete (that is, it is possible that some PRs that have been fixed are not
   listed here).

    Bootstrap failures and issues

     * [171]16469 [mips-sgi-irix5.3] bootstrap fails in libstdc++-v3/testsuite
     * [172]16344 [hppa-linux-gnu] libstdc++'s PCH built by profiledbootstrap
       does not work with the built compiler
     * [173]16842 [Solaris/x86] mkheaders can not find mkheaders.conf

    Multi-platform internal compiler errors (ICEs)

     * [174]12608 (c++) ICE: expected class 't', have 'x' (error_mark) in
       cp_parser_class_specifier, in cp/parser.c
     * [175]14492 ICE in loc_descriptor_from_tree, in dwarf2out.c
     * [176]15461 (c++) ICE due to NRV and inlining
     * [177]15890 (c++) ICE in c_expand_expr, in c-common.c
     * [178]16180 ICE: segmentation fault in RTL optimization
     * [179]16224 (c++) ICE in write_unscoped_name (template/namespace)
     * [180]16408 ICE: in delete_insn, in cfgrtl.c
     * [181]16529 (c++) ICE for: namespace-alias shall not be declared as the
       name of any other entity
     * [182]16698 (c++) ICE with exceptions and declaration of __cxa_throw
     * [183]16706 (c++) ICE in finish_member_declaration, in cp/semantics.c
     * [184]16810  (c++)  Legal  C++  program  with  cast  gives  ICE  in
       build_ptrmemfunc
     * [185]16851 (c++) ICE when throwing a comma expression
     * [186]16870 (c++) Boost.Spirit causes ICE in tsubst, in cp/pt.c
     * [187]16904 (c++) ICE in finish_class_member_access_expr, in cp/typeck.c
     * [188]16905 (c++) ICE (segfault) with exceptions
     * [189]16964 (c++) ICE in cp_parser_class_specifier due to redefinition
     * [190]17068  (c++)  ICE:  tree  check: expected class 'd', have 'x'
       (identifier_node) in dependent_template_p, in cp/pt.c

    Preprocessor bugs

     * [191]16366 Preprocessor option -remap causes memory corruption

    Optimization

     * [192]15345 unreferenced nested inline functions not optimized away
     * [193]16590 Incorrect execution when compiling with -O2
     * [194]16693 Bitwise AND is lost when used within a cast to an enum of the
       same precision
     * [195]17078 Jump into if(0) substatement fails

    Problems in generated debug information

     * [196]13956 incorrect stabs for nested local variables

    C front end bugs

     * [197]16684  GCC  should not warn about redundant redeclarations of
       built-ins

    C++ compiler and library

     * [198]12658   Thread   safety   problems  in  locale::global()  and
       locale::locale()
     * [199]13092 g++ accepts invalid pointer-to-member conversion
     * [200]15320 Excessive memory consumption
     * [201]16246 Incorrect template argument deduction
     * [202]16273  Memory exhausted when using nested classes and virtual
       functions
     * [203]16401 ostringstream in gcc 3.4.x very slow for big data
     * [204]16411 undefined reference to __gnu_cxx::stdio_sync_filebuf<char,
       std::char_traits<char> >::file()
     * [205]16489 G++ incorrectly rejects use of a null constant integral
       expression as a null constant pointer
     * [206]16618 offsetof fails with constant member
     * [207]16637 syntax error reported for valid input code
     * [208]16717 __attribute__((constructor)) broken in C++
     * [209]16813  compiler  error  in  DEBUG  version of range insertion
       std::map::insert
     * [210]16853  pointer-to-member initialization from incompatible one
       accepted
     * [211]16889 ambiguity is not detected
     * [212]16959 Segmentation fault in ios_base::sync_with_stdio

    Java compiler and library

     * [213]7587 direct threaded interpreter not thread-safe
     * [214]16473 ServerSocket accept() leaks file descriptors
     * [215]16478 Hash synchronization deadlock with finalizers

    Alpha-specific

     * [216]10695 ICE in dwarf2out_frame_debug_expr, in dwarf2out.c
     * [217]16974 could not split insn (ice in final_scan_insn, in final.c)

    x86-specific

     * [218]16298 ICE in output_operand
     * [219]17113 ICE with SSE2 intrinsics

    x86-64 specific

     * [220]14697 libstdc++ couldn't find 32bit libgcc_s

    MIPS-specific

     * [221]15869 [mips64] No NOP after LW (with -mips1 -O0)
     * [222]16325 [mips64] value profiling clobbers gp on mips
     * [223]16357 [mipsisa64-elf] ICE copying 7 bytes between extern char[]s
     * [224]16380 [mips64] Use of uninitialised register after dbra conversion
     * [225]16407 [mips64] Unaligned access to local variables
     * [226]16643 [mips64] verify_local_live_at_start ICE after crossjumping &
       cfgcleanup

    ARM-specific

     * [227]15927 THUMB -O2: strength-reduced iteration variable ends up off by
       1
     * [228]15948 THUMB: ICE with non-commutative cbranch
     * [229]17019   THUMB:   bad   switch   statement   in  md  code  for
       addsi3_cbranch_scratch

    IA64-specific

     * [230]16130  ICE  on valid code: in bundling, in config/ia64/ia64.c
       (-mtune=merced)
     * [231]16142  ICE  on valid code: in bundling, in config/ia64/ia64.c
       (-mtune=itanium)
     * [232]16278 Gcc failed to build Linux kernel with -mtune=merced
     * [233]16414 ICE on valid code: typo in comparison of asm_noperands result
     * [234]16445 ICE on valid code: don't count ignored insns
     * [235]16490 ICE (segfault) while compiling with -fprofile-use
     * [236]16683 ia64 does not honor SUBTARGET_EXTRA_SPECS

    PowerPC-specific

     * [237]16195 (ppc64): Miscompilation of GCC 3.3.x by 3.4.x
     * [238]16239 ICE on ppc64 (mozilla 1.7 compile, -O1 -fno-exceptions issue)

    SPARC-specific

     * [239]16199 ICE while compiling apache 2.0.49
     * [240]16416 -m64 doesn't imply -mcpu=v9 anymore
     * [241]16430 ICE when returning non-C aggregates larger than 16 bytes

    Bugs specific to embedded processors

     * [242]16379 [m32r] can't output large model function call of memcpy
     * [243]17093 [m32r] ICE with -msdata=use -O0
     * [244]17119 [m32r] ICE at switch case 0x8000

    DJGPP-specific

     * [245]15928 libstdc++ in 3.4.x doesn't cross-compile for djgpp

    Alpha Tru64-specific

     * [246]16210 libstdc++ gratuitously omits "long long" I/O

    Testsuite, documentation issues (compiler is not affected):

     * [247]15488  (libstdc++) possibly insufficient file permissions for
       executing test suite
     * [248]16250 ada/doctools runs makeinfo even in release tarball
     _________________________________________________________________

GCC 3.4.3

   This is the [249]list of problem reports (PRs) from GCC's bug tracking
   system that are known to be fixed in the 3.4.3 release. This list might not
   be complete (that is, it is possible that some PRs that have been fixed are
   not listed here).

    Bootstrap failures

     * [250]17369 [ia64] Bootstrap failure with binutils-2.15.90.0.1.1
     * [251]17850 [arm-elf] bootstrap failure - libstdc++ uses strtold when
       undeclared

    Internal compiler errors (ICEs) affecting multiple platforms

     * [252]13948 (java) GCJ segmentation fault while compiling GL4Java .class
       files
     * [253]14492 ICE in loc_descriptor_from_tree, in dwarf2out.c
     * [254]16301 (c++) ICE when "strong" attribute is attached to a using
       directive
     * [255]16566 ICE with flexible arrays
     * [256]17023 ICE with nested functions in parameter declaration
     * [257]17027 ICE with noreturn function in loop at -O2
     * [258]17524 ICE in grokdeclarator, in cp/decl.c
     * [259]17826 (c++) ICE in cp_tree_equal

    C and optimization bugs

     * [260]15526 -ftrapv aborts on 0 * (-1)
     * [261]16999 #ident stopped working
     * [262]17503 quadratic behaviour in invalid_mode_change_p
     * [263]17581 Long long arithmetic fails inside a switch/case statement
       when compiled with -O2
     * [264]18129 -fwritable-strings doesn't work

    C++ compiler and library bugs

     * [265]10975 incorrect initial ostringstream::tellp()
     * [266]11722 Unbuffered filebuf::sgetn is slow
     * [267]14534 Unrecognizing static function as a template parameter when
       its return value is also templated
     * [268]15172 Copy constructor optimization in aggregate initialization
     * [269]15786 Bad error message for frequently occuring error.
     * [270]16162 Rejects valid member-template-definition
     * [271]16612 empty basic_strings can't live in shared memory
     * [272]16715 std::basic_iostream is instantiated when used, even though
       instantiations are already contained in libstdc++
     * [273]16848 code in /ext/demangle.h appears broken
     * [274]17132 GCC fails to eliminate function template specialization when
       argument deduction fails
     * [275]17259 One more _S_leaf incorrectly qualified with _RopeRep:: in
       ropeimpl.h
     * [276]17327 use of `enumeral_type' in template type unification
     * [277]17393 "unused variable '._0'" warning with -Wall
     * [278]17501 Confusion with member templates
     * [279]17537 g++ not passing -lstdc++ to linker when all command line
       arguments are libraries
     * [280]17585 usage of unqualified name of static member from within class
       not allowed
     * [281]17821 Poor diagnostic for using "." instead of "->"
     * [282]17829 wrong error: call of overloaded function is ambiguous
     * [283]17851 Misleading diagnostic for invalid function declarations with
       undeclared types
     * [284]17976 Destructor is called twice
     * [285]18020 rejects valid definition of enum value in template
     * [286]18093 bogus conflict in namespace aliasing
     * [287]18140 C++ parser bug when using >> in templates

    Fortran

     * [288]17541 data statements with double precision constants fail

    x86-specific

     * [289]17853 -O2 ICE for MMX testcase

    SPARC-specific

     * [290]17245 ICE compiling gsl-1.5 statistics/lag1.c

    Darwin-specific

     * [291]17167 FATAL:Symbol L_foo$stub already defined.

    AIX-specific

     * [292]17277 could not catch an exception when specified -maix64

    Solaris-specific

     * [293]17505 <cmath> calls acosf(), ceilf(), and other functions missing
       from system libraries

    HP/UX specific:

     * [294]17684 /usr/ccs/bin/ld: Can't create libgcc_s.sl

    ARM-specific

     * [295]17384 ICE with mode attribute on structures

    MIPS-specific

     * [296]17770 No NOP after LWL with -mips1

    Other embedded target specific

     * [297]11476 [arc-elf] gcc ICE on newlib's vfprintf.c
     * [298]14064 [avr-elf] -fdata-sections triggers ICE
     * [299]14678 [m68hc11-elf] gcc ICE
     * [300]15583 [powerpc-rtems] powerpc-rtems lacks __USE_INIT_FINI__
     * [301]15790 [i686-coff] Alignment error building gcc with i686-coff
       target
     * [302]15886 [SH] Miscompilation with -O2 -fPIC
     * [303]16884 [avr-elf] [fweb related] bug while initializing variables

    Bugs relating to debugger support

     * [304]13841 missing debug info for _Complex function arguments
     * [305]15860 [big-endian targets] No DW_AT_location debug info is emitted
       for formal arguments to a function that uses "register" qualifiers

    Testsuite issues (compiler not affected)

     * [306]17465 Testsuite in libffi overrides LD_LIBRARY_PATH
     * [307]17469 Testsuite in libstdc++ overrides LD_LIBRARY_PATH
     * [308]18138  [mips-sgi-irix6.5]  libgcc_s.so.1  not found by 64-bit
       testsuite

    Documentation

     * [309]15498 typo in gcc manual: non-existing locale example en_UK, should
       be en_GB
     * [310]15747 [mips-sgi-irix5.3] /bin/sh hangs during bootstrap: document
       broken shell
     * [311]16406 USE_LD_AS_NEEDED undocumented
     _________________________________________________________________

GCC 3.4.4

   This is the [312]list of problem reports (PRs) from GCC's bug tracking
   system that are known to be fixed in the 3.4.4 release. This list might not
   be complete (that is, it is possible that some PRs that have been fixed are
   not listed here).
     _________________________________________________________________

GCC 3.4.5

   This is the [313]list of problem reports (PRs) from GCC's bug tracking
   system that are known to be fixed in the 3.4.5 release. This list might not
   be complete (that is, it is possible that some PRs that have been fixed are
   not listed here).

    Bootstrap issues

     * [314]24688 sco_math fixincl breaks math.h

    C compiler bugs

     * [315]17188 struct Foo { } redefinition
     * [316]20187   wrong   code   for   ((unsigned  char)(unsigned  long
       long)((a?a:1)&(a*b)))?0:1)
     * [317]21873 infinite warning loop on bad array initializer
     * [318]21899 enum definition accepts values to be overriden
     * [319]22061 ICE in find_function_data, in function.c
     * [320]22308 Failure to diagnose violation of constraint 6.516p2
     * [321]22458 ICE on missing brace
     * [322]22589 ICE casting to long long
     * [323]24101 Segfault with preprocessed source

    C++ compiler and library bugs

     * [324]10611 operations on vector mode not recognized in C++
     * [325]13377 unexpected behavior of namespace usage directive
     * [326]16002 Strange error message with new parser
     * [327]17413 local classes as template argument
     * [328]17609 spurious error message after using keyword
     * [329]17618 ICE in cp_convert_to_pointer, in cp/cvt.c
     * [330]18124 ICE with invalid template template parameter
     * [331]18155 typedef in template declaration not rejected
     * [332]18177 ICE with const_cast for undeclared variable
     * [333]18368 C++ error message regression
     * [334]16378 ICE when returning a copy of a packed member
     * [335]18466 int ::i; accepted
     * [336]18512 ICE on invalid usage of template base class
     * [337]18454 ICE when returning undefined type
     * [338]18738 typename not allowed with non-dependent qualified name
     * [339]18803 rejects access to operator() in template
     * [340]19004 ICE in uses_template_parms, in cp/pt.c
     * [341]19208 Spurious error about variably modified type
     * [342]18253 bad error message / ICE for invalid template parameter
     * [343]19608 ICE after friend function definition in local class
     * [344]19884 ICE on explicit instantiation of a non-template constructor
     * [345]20153 ICE when C++ template function contains anonymous union
     * [346]20563 Infinite loop in diagnostic (and ice after error message)
     * [347]20789 ICE with incomplete type in template
     * [348]21336 Internal compiler error when using custom new operators
     * [349]21768 ICE in error message due to violation of coding conventions
     * [350]21853 constness of pointer to data member ignored
     * [351]21903 Default argument of template function causes a compile-time
       error
     * [352]21983 multiple diagnostics
     * [353]21987 New testsuite failure g++.dg/warn/conversion-function-1.C
     * [354]22153 ICE on invalid template specialization
     * [355]22172 Internal compiler error, seg fault.
     * [356]21286 filebuf::xsgetn vs pipes
     * [357]22233 ICE with wrong number of template parameters
     * [358]22508 ICE after invalid operator new
     * [359]22545 ICE with pointer to class member & user defined conversion
       operator
     * [360]23528 Wrong default allocator in ext/hash_map
     * [361]23550 char_traits requirements/1.cc test bad math
     * [362]23586 Bad diagnostic for invalid namespace-name
     * [363]23624 ICE in invert_truthvalue, in fold-const.c
     * [364]23639 Bad error message: not a member of '<declaration error>'
     * [365]23797 ICE on typename outside template
     * [366]23965  Bogus  error message: no matching function for call to
       'foo(<type error>)'
     * [367]24052 &#`label_decl' not supported by dump_expr#<expression error>
     * [368]24580 virtual base class cause exception not to be caught

    Problems in generated debug information

     * [369]24267 Bad DWARF for altivec vectors

    Optimizations issues

     * [370]17810 ICE in verify_local_live_at_start
     * [371]17860 Wrong generated code for loop with varying bound
     * [372]21709 ICE on compile-time complex NaN
     * [373]21964 broken tail call at -O2 or more
     * [374]22167 Strange optimization bug when using -Os
     * [375]22619 Compilation failure for real_const_1.f and real_const_2.f90
     * [376]23241 Invalid code generated for comparison of uchar to 255
     * [377]23478 Miscompilation due to reloading of a var that is also used in
       EH pad
     * [378]24470 segmentation fault in cc1plus when compiling with -O
     * [379]24950 ICE in operand_subword_force

    Precompiled headers problems

     * [380]14400 Cannot compile qt-x11-free-3.3.0
     * [381]14940 PCH largefile test fails on various platforms

    Preprocessor bugs

     * [382]20239 ICE on empty preprocessed input
     * [383]15220 "gcc -E -MM -MG" reports missing system headers in source
       directory

    Testsuite issues

     * [384]19275   gcc.dg/20020919-1.c   fails   with   -fpic/-fPIC   on
       i686-pc-linux-gnu

    Alpha specific

     * [385]21888 bootstrap failure with linker relaxation enabled

    ARM specific

     * [386]15342 [arm-linux]: ICE in verify_local_live_at_start
     * [387]23985 Memory aliasing information incorrect in inlined memcpy

    ColdFile specific

     * [388]16719 Illegal move of byte into address register causes compiler to
       ICE

    HPPA specific

     * [389]21723 ICE while building libgfortran
     * [390]21841 -mhp-ld/-mgnu-ld documentation

    IA-64 specific

     * [391]23644 IA-64 hardware models and configuration options documentation
       error
     * [392]24718 Shared libgcc not used for linking by default

    M68000 specific

     * [393]18421 ICE in reload_cse_simplify_operands, in postreload.c

    MIPS specific

     * [394]20621 ICE in change_address_1, in emit-rtl.c

    PowerPC and PowerPC64 specific

     * [395]18583 error on valid code: const __attribute__((altivec(vector__)))
       doesn't work in arrays
     * [396]20191 ICE in reload_cse_simplify_operands
     * [397]22083 AIX: TARGET_C99_FUNCTIONS is wrongly defined
     * [398]23070 CALL_V4_CLEAR_FP_ARGS flag not properly set
     * [399]23404 gij trashes args of functions with more than 8 fp args
     * [400]23539 C & C++ compiler generating misaligned references regardless
       of compiler flags
     * [401]24102 floatdisf2_internal2 broken
     * [402]24465 -mminimal-toc miscompilation of __thread vars

    Solaris specific

     * [403]19933 Problem with define of HUGE_VAL in math_c99
     * [404]21889 Native Solaris assembler cannot grok DTP-relative debug
       symbols

    SPARC specific

     * [405]19300 PCH failures on sparc-linux
     * [406]20301 Assembler labels have a leading "-"
     * [407]20673 C PCH testsuite assembly comparison failure

    x86 and x86_64 specific

     * [408]18582 ICE with arrays of type V2DF
     * [409]19340   Compilation   SEGFAULTs  with  -O1  -fschedule-insns2
       -fsched2-use-traces
     * [410]21716 ICE in reg-stack.c's swap_rtx_condition
     * [411]24315 amd64 fails -fpeephole2
     _________________________________________________________________

GCC 3.4.6

   This is the [412]list of problem reports (PRs) from GCC's bug tracking
   system that are known to be fixed in the 3.4.6 release. This list might not
   be complete (that is, it is possible that some PRs that have been fixed are
   not listed here).

   Please send FSF & GNU inquiries & questions to [413]gnu@gnu.org. There are
   also [414]other ways to contact the FSF.

   These pages are maintained by [415]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [416]GCC manuals. If that fails, the [417]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [418]gcc@gnu.org or [419]gcc@gcc.gnu.org. All of
    our lists have [420]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [421]Valid XHTML 1.0 

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 223. http://gcc.gnu.org/PR16357
 224. http://gcc.gnu.org/PR16380
 225. http://gcc.gnu.org/PR16407
 226. http://gcc.gnu.org/PR16643
 227. http://gcc.gnu.org/PR15927
 228. http://gcc.gnu.org/PR15948
 229. http://gcc.gnu.org/PR17019
 230. http://gcc.gnu.org/PR16130
 231. http://gcc.gnu.org/PR16142
 232. http://gcc.gnu.org/PR16278
 233. http://gcc.gnu.org/PR16414
 234. http://gcc.gnu.org/PR16445
 235. http://gcc.gnu.org/PR16490
 236. http://gcc.gnu.org/PR16683
 237. http://gcc.gnu.org/PR16195
 238. http://gcc.gnu.org/PR16239
 239. http://gcc.gnu.org/PR16199
 240. http://gcc.gnu.org/PR16416
 241. http://gcc.gnu.org/PR16430
 242. http://gcc.gnu.org/PR16379
 243. http://gcc.gnu.org/PR17093
 244. http://gcc.gnu.org/PR17119
 245. http://gcc.gnu.org/PR15928
 246. http://gcc.gnu.org/PR16210
 247. http://gcc.gnu.org/PR15488
 248. http://gcc.gnu.org/PR16250
 249. http://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=3.4.3
 250. http://gcc.gnu.org/PR17369
 251. http://gcc.gnu.org/PR17850
 252. http://gcc.gnu.org/PR13948
 253. http://gcc.gnu.org/PR14492
 254. http://gcc.gnu.org/PR16301
 255. http://gcc.gnu.org/PR16566
 256. http://gcc.gnu.org/PR17023
 257. http://gcc.gnu.org/PR17027
 258. http://gcc.gnu.org/PR17524
 259. http://gcc.gnu.org/PR17826
 260. http://gcc.gnu.org/PR15526
 261. http://gcc.gnu.org/PR16999
 262. http://gcc.gnu.org/PR17503
 263. http://gcc.gnu.org/PR17581
 264. http://gcc.gnu.org/PR18129
 265. http://gcc.gnu.org/PR10975
 266. http://gcc.gnu.org/PR11722
 267. http://gcc.gnu.org/PR14534
 268. http://gcc.gnu.org/PR15172
 269. http://gcc.gnu.org/PR15786
 270. http://gcc.gnu.org/PR16162
 271. http://gcc.gnu.org/PR16612
 272. http://gcc.gnu.org/PR16715
 273. http://gcc.gnu.org/PR16848
 274. http://gcc.gnu.org/PR17132
 275. http://gcc.gnu.org/PR17259
 276. http://gcc.gnu.org/PR17327
 277. http://gcc.gnu.org/PR17393
 278. http://gcc.gnu.org/PR17501
 279. http://gcc.gnu.org/PR17537
 280. http://gcc.gnu.org/PR17585
 281. http://gcc.gnu.org/PR17821
 282. http://gcc.gnu.org/PR17829
 283. http://gcc.gnu.org/PR17851
 284. http://gcc.gnu.org/PR17976
 285. http://gcc.gnu.org/PR18020
 286. http://gcc.gnu.org/PR18093
 287. http://gcc.gnu.org/PR18140
 288. http://gcc.gnu.org/PR17541
 289. http://gcc.gnu.org/PR17853
 290. http://gcc.gnu.org/PR17245
 291. http://gcc.gnu.org/PR17167
 292. http://gcc.gnu.org/PR17277
 293. http://gcc.gnu.org/PR17505
 294. http://gcc.gnu.org/PR17684
 295. http://gcc.gnu.org/PR17384
 296. http://gcc.gnu.org/PR17770
 297. http://gcc.gnu.org/PR11476
 298. http://gcc.gnu.org/PR14064
 299. http://gcc.gnu.org/PR14678
 300. http://gcc.gnu.org/PR15583
 301. http://gcc.gnu.org/PR15790
 302. http://gcc.gnu.org/PR15886
 303. http://gcc.gnu.org/PR16884
 304. http://gcc.gnu.org/PR13841
 305. http://gcc.gnu.org/PR15860
 306. http://gcc.gnu.org/PR17465
 307. http://gcc.gnu.org/PR17469
 308. http://gcc.gnu.org/PR18138
 309. http://gcc.gnu.org/PR15498
 310. http://gcc.gnu.org/PR15747
 311. http://gcc.gnu.org/PR16406
 312. http://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=3.4.4
 313. http://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=3.4.5
 314. http://gcc.gnu.org/PR24688
 315. http://gcc.gnu.org/PR17188
 316. http://gcc.gnu.org/PR20187
 317. http://gcc.gnu.org/PR21873
 318. http://gcc.gnu.org/PR21899
 319. http://gcc.gnu.org/PR22061
 320. http://gcc.gnu.org/PR22208
 321. http://gcc.gnu.org/PR22458
 322. http://gcc.gnu.org/PR22589
 323. http://gcc.gnu.org/PR24101
 324. http://gcc.gnu.org/PR10611
 325. http://gcc.gnu.org/PR13377
 326. http://gcc.gnu.org/PR16002
 327. http://gcc.gnu.org/PR17413
 328. http://gcc.gnu.org/PR17609
 329. http://gcc.gnu.org/PR17618
 330. http://gcc.gnu.org/PR18124
 331. http://gcc.gnu.org/PR18155
 332. http://gcc.gnu.org/PR18177
 333. http://gcc.gnu.org/PR18368
 334. http://gcc.gnu.org/PR18378
 335. http://gcc.gnu.org/PR18466
 336. http://gcc.gnu.org/PR18512
 337. http://gcc.gnu.org/PR18545
 338. http://gcc.gnu.org/PR18738
 339. http://gcc.gnu.org/PR18803
 340. http://gcc.gnu.org/PR19004
 341. http://gcc.gnu.org/PR19208
 342. http://gcc.gnu.org/PR19253
 343. http://gcc.gnu.org/PR19608
 344. http://gcc.gnu.org/PR19884
 345. http://gcc.gnu.org/PR20153
 346. http://gcc.gnu.org/PR20563
 347. http://gcc.gnu.org/PR20789
 348. http://gcc.gnu.org/PR21336
 349. http://gcc.gnu.org/PR21768
 350. http://gcc.gnu.org/PR21853
 351. http://gcc.gnu.org/PR21903
 352. http://gcc.gnu.org/PR21983
 353. http://gcc.gnu.org/PR21987
 354. http://gcc.gnu.org/PR22153
 355. http://gcc.gnu.org/PR22172
 356. http://gcc.gnu.org/PR21286
 357. http://gcc.gnu.org/PR22233
 358. http://gcc.gnu.org/PR22508
 359. http://gcc.gnu.org/PR22545
 360. http://gcc.gnu.org/PR23528
 361. http://gcc.gnu.org/PR23550
 362. http://gcc.gnu.org/PR23586
 363. http://gcc.gnu.org/PR23624
 364. http://gcc.gnu.org/PR23639
 365. http://gcc.gnu.org/PR23797
 366. http://gcc.gnu.org/PR23965
 367. http://gcc.gnu.org/PR24052
 368. http://gcc.gnu.org/PR24580
 369. http://gcc.gnu.org/PR24267
 370. http://gcc.gnu.org/PR17810
 371. http://gcc.gnu.org/PR17860
 372. http://gcc/gnu.org/PR21709
 373. http://gcc.gnu.org/PR21964
 374. http://gcc.gnu.org/PR22167
 375. http://gcc.gnu.org/PR22619
 376. http://gcc.gnu.org/PR23241
 377. http://gcc.gnu.org/PR23478
 378. http://gcc.gnu.org/PR24470
 379. http://gcc.gnu.org/PR24950
 380. http://gcc.gnu.org/PR14400
 381. http://gcc.gnu.org/PR14940
 382. http://gcc.gnu.org/PR20239
 383. http://gcc.gnu.org/PR15220
 384. http://gcc.gnu.org/PR19275
 385. http://gcc.gnu.org/PR21888
 386. http://gcc.gnu.org/PR15342
 387. http://gcc.gnu.org/PR23985
 388. http://gcc.gnu.org/PR16719
 389. http://gcc.gnu.org/PR21723
 390. http://gcc.gnu.org/PR21841
 391. http://gcc.gnu.org/PR23644
 392. http://gcc.gnu.org/PR24718
 393. http://gcc.gnu.org/PR18421
 394. http://gcc.gnu.org/PR20621
 395. http://gcc.gnu.org/PR18583
 396. http://gcc.gnu.org/PR20191
 397. http://gcc.gnu.org/PR22083
 398. http://gcc.gnu.org/PR23070
 399. http://gcc.gnu.org/PR23404
 400. http://gcc.gnu.org/PR23539
 401. http://gcc.gnu.org/PR24102
 402. http://gcc.gnu.org/PR24465
 403. http://gcc.gnu.org/PR19933
 404. http://gcc.gnu.org/PR21889
 405. http://gcc.gnu.org/PR19300
 406. http://gcc.gnu.org/PR20301
 407. http://gcc.gnu.org/PR20673
 408. http://gcc.gnu.org/PR18582
 409. http://gcc.gnu.org/PR19340
 410. http://gcc.gnu.org/PR21716
 411. http://gcc.gnu.org/PR24315
 412. http://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=3.4.6
 413. mailto:gnu@gnu.org
 414. http://www.gnu.org/home.html#ContactInfo
 415. http://gcc.gnu.org/about.html
 416. http://gcc.gnu.org/onlinedocs/
 417. mailto:gcc-help@gcc.gnu.org
 418. mailto:gcc@gnu.org
 419. mailto:gcc@gcc.gnu.org
 420. http://gcc.gnu.org/lists.html
 421. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.3/index.html

                           GCC 3.3 Release Series

   May 03, 2005

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.3.6.

   This release is a bug-fix release, containing fixes for regressions in GCC
   3.3.5 relative to previous releases of GCC.

   This release is the last of the series 3.3.x.

   The GCC 3.3 release series includes numerous [2]new features, improvements,
   bug fixes, and other changes, thanks to an [3]amazing group of volunteers.

Release History

   GCC 3.3.6
          May 3, 2005 ([4]changes)

   GCC 3.3.5
          September 30, 2004 ([5]changes)

   GCC 3.3.4
          May 31, 2004 ([6]changes)

   GCC 3.3.3
          February 14, 2004 ([7]changes)

   GCC 3.3.2
          October 16, 2003 ([8]changes)

   GCC 3.3.1
          August 8, 2003 ([9]changes)

   GCC 3.3
          May 14, 2003 ([10]changes)

References and Acknowledgements

   GCC used to stand for the GNU C Compiler, but since the compiler supports
   several other languages aside from C, it now stands for the GNU Compiler
   Collection.

   A  list of [11]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed new features, improvements, bug fixes, and other changes as well
   as test results to GCC. This [12]amazing group of volunteers is what makes
   GCC successful.

   For additional information about GCC please refer to the [13]GCC project web
   site or contact the [14]GCC development mailing list.

   To obtain GCC please use [15]our mirror sites, one of the [16]GNU mirror
   sites, or our CVS server.

   Please send FSF & GNU inquiries & questions to [17]gnu@gnu.org. There are
   also [18]other ways to contact the FSF.

   These pages are maintained by [19]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [20]GCC manuals. If that fails, the [21]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [22]gcc@gnu.org or [23]gcc@gcc.gnu.org. All of
    our lists have [24]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [25]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://gcc.gnu.org/gcc-3.3/changes.html
   3. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   4. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.6
   5. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.5
   6. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.4
   7. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.3
   8. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.2
   9. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.1
  10. http://gcc.gnu.org/gcc-3.3/changes.html
  11. http://gcc.gnu.org/gcc-3.3/buildstat.html
  12. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
  13. http://gcc.gnu.org/index.html
  14. mailto:gcc@gcc.gnu.org
  15. http://gcc.gnu.org/mirrors.html
  16. http://www.gnu.org/order/ftp.html
  17. mailto:gnu@gnu.org
  18. http://www.gnu.org/home.html#ContactInfo
  19. http://gcc.gnu.org/about.html
  20. http://gcc.gnu.org/onlinedocs/
  21. mailto:gcc-help@gcc.gnu.org
  22. mailto:gcc@gnu.org
  23. mailto:gcc@gcc.gnu.org
  24. http://gcc.gnu.org/lists.html
  25. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.3/changes.html

                           GCC 3.3 Release Series
                      Changes, New Features, and Fixes

   The latest release in the 3.3 release series is [1]GCC 3.3.6.

Caveats

     * The preprocessor no longer accepts multi-line string literals. They were
       deprecated in 3.0, 3.1, and 3.2.
     * The preprocessor no longer supports the -A- switch when appearing alone.
       -A- followed by an assertion is still supported.
     * Support for all the systems [2]obsoleted in GCC 3.1 has been removed
       from GCC 3.3. See below for a [3]list of systems which are obsoleted in
       this release.
     * Checking for null format arguments has been decoupled from the rest of
       the format checking mechanism. Programs which use the format attribute
       may regain this functionality by using the new [4]nonnull function
       attribute. Note that all functions for which GCC has a built-in format
       attribute, an appropriate built-in nonnull attribute is also applied.
     * The DWARF (version 1) debugging format has been deprecated and will be
       removed in a future version of GCC. Version 2 of the DWARF debugging
       format will continue to be supported for the foreseeable future.
     * The C and Objective-C compilers no longer accept the "Naming Types"
       extension (typedef foo = bar); it was already unavailable in C++. Code
       which uses it will need to be changed to use the "typeof" extension
       instead:  typedef typeof(bar) foo. (We have removed this extension
       without a period of deprecation because it has caused the compiler to
       crash since version 3.0 and no one noticed until very recently. Thus we
       conclude it is not in widespread use.)
     * The -traditional C compiler option has been removed. It was deprecated
       in 3.1 and 3.2. (Traditional preprocessing remains available.) The
       <varargs.h> header, used for writing variadic functions in traditional
       C, still exists but will produce an error message if used.
     * GCC 3.3.1 automatically places zero-initialized variables in the .bss
       section on some operating systems. Versions of GNU Emacs up to (and
       including) 21.3 will not work correctly when using this optimization;
       you can use -fno-zero-initialized-in-bss to disable it.

General Optimizer Improvements

     * A new scheme for accurately describing processor pipelines, the [5]DFA
       scheduler, has been added.
     * Pavel Nejedly, Charles University Prague, has contributed new file
       format used by the edge coverage profiler (-fprofile-arcs).
       The new format is robust and diagnoses common mistakes where profiles
       from different versions (or compilations) of the program are combined
       resulting in nonsensical profiles and slow code to produced with profile
       feedback. Additionally this format allows extra data to be gathered.
       Currently,  overall  statistics are produced helping optimizers to
       identify  hot  spots  of  a  program  globally  replacing  the old
       intra-procedural scheme and resulting in better code. Note that the gcov
       tool from older GCC versions will not be able to parse the profiles
       generated by GCC 3.3 and vice versa.
     * Jan Hubicka, SuSE Labs, has contributed a new superblock formation pass
       enabled  using  -ftracer. This pass simplifies the control flow of
       functions allowing other optimizations to do better job.
       He also contributed the function reordering pass (-freorder-functions)
       to optimize function placement using profile feedback.

New Languages and Language specific improvements

  C/ObjC/C++

     * The preprocessor now accepts directives within macro arguments. It
       processes them just as if they had not been within macro arguments.
     * The separate ISO and traditional preprocessors have been completely
       removed. The front end handles either type of preprocessed output if
       necessary.
     * In C99 mode preprocessor arithmetic is done in the precision of the
       target's intmax_t, as required by that standard.
     * The preprocessor can now copy comments inside macros to the output file
       when the macro is expanded. This feature, enabled using the -CC option,
       is intended for use by applications which place metadata or directives
       inside comments, such as lint.
     * The method of constructing the list of directories to be searched for
       header files has been revised. If a directory named by a -I option is a
       standard system include directory, the option is ignored to ensure that
       the  default  search  order for system directories and the special
       treatment of system header files are not defeated.
     * A few more [6]ISO C99 features now work correctly.
     * A new function attribute, nonnull, has been added which allows pointer
       arguments to functions to be specified as requiring a non-null value.
       The compiler currently uses this information to issue a warning when it
       detects a null value passed in such an argument slot.
     * A new type attribute, may_alias, has been added. Accesses to objects
       with types with this attribute are not subjected to type-based alias
       analysis, but are instead assumed to be able to alias any other type of
       objects, just like the char type.

  C++

     * Type based alias analysis has been implemented for C++ aggregate types.

  Objective-C

     * Generate an error if Objective-C objects are passed by value in function
       and method calls.
     * When -Wselector is used, check the whole list of selectors at the end of
       compilation, and emit a warning if a @selector() is not known.
     * Define __NEXT_RUNTIME__ when compiling for the NeXT runtime.
     * No longer need to include objc/objc-class.h to compile self calls in
       class methods (NeXT runtime only).
     * New -Wundeclared-selector option.
     * Removed selector bloating which was causing object files to be 10%
       bigger on average (GNU runtime only).
     * Using  at  run  time @protocol() objects has been fixed in certain
       situations (GNU runtime only).
     * Type checking has been fixed and improved in many situations involving
       protocols.

  Java

     * The java.sql and javax.sql packages now implement the JDBC 3.0 (JDK 1.4)
       API.
     * The JDK 1.4 assert facility has been implemented.
     * The bytecode interpreter is now direct threaded and thus faster.

  Fortran

     * Fortran improvements are listed in [7]the Fortran documentation.

  Ada

     * Ada tasking now works with glibc 2.3.x threading libraries.

New Targets and Target Specific Improvements

     * The following changes have been made to the HP-PA port:
          + The  port now defaults to scheduling for the PA8000 series of
            processors.
          + Scheduling support for the PA7300 processor has been added.
          + The 32-bit port now supports weak symbols under HP-UX 11.
          + The handling of initializers and finalizers has been improved under
            HP-UX 11. The 64-bit port no longer uses collect2.
          + Dwarf2 EH support has been added to the 32-bit linux port.
          + ABI fixes to correct the passing of small structures by value.
     * The SPARC, HP-PA, SH4, and x86/pentium ports have been converted to use
       the DFA processor pipeline description.
     * The following NetBSD configurations for the SuperH processor family have
       been added:
          + SH3, big-endian, sh-*-netbsdelf*
          + SH3, little-endian, shle-*-netbsdelf*
          + SH5, SHmedia, big-endian, 32-bit default, sh5-*-netbsd*
          + SH5, SHmedia, little-endian, 32-bit default, sh5le-*-netbsd*
          + SH5, SHmedia, big-endian, 64-bit default, sh64-*-netbsd*
          + SH5, SHmedia, little-endian, 64-bit default, sh64le-*-netbsd*
     * The following changes have been made to the IA-32/x86-64 port:
          + SSE2 and 3dNOW! intrinsics are now supported.
          + Support for thread local storage has been added to the IA-32 and
            x86-64 ports.
          + The x86-64 port has been significantly improved.
     * The following changes have been made to the MIPS port:
          + All configurations now accept the -mabi switch. Note that you will
            need appropriate multilibs for this option to work properly.
          + ELF configurations will always pass an ABI flag to the assembler,
            except when the MIPS EABI is selected.
          + -mabi=64 no longer selects MIPS IV code.
          + The -mcpu option, which was deprecated in 3.1 and 3.2, has been
            removed from this release.
          + -march now changes the core ISA level. In previous releases, it
            would change the use of processor-specific extensions, but would
            leave the core ISA unchanged. For example, mips64-elf -march=r8000
            will now generate MIPS IV code.
          + Under most configurations, -mipsN now acts as a synonym for -march.
          + There are some new preprocessor macros to describe the -march and
            -mtune  settings.  See the documentation of those options for
            details.
          + Support for the NEC VR-Series processors has been added. This
            includes the 54xx, 5500, and 41xx series.
          + Support for the Sandcraft sr71k processor has been added.
     * The following changes have been made to the S/390 port:
          + Support to build the Java runtime libraries has been added. Java is
            now enabled by default on s390-*-linux* and s390x-*-linux* targets.
          + Multilib support for the s390x-*-linux* target has been added; this
            allows to build 31-bit binaries using the -m31 option.
          + Support for thread local storage has been added.
          + Inline assembler code may now use the 'Q' constraint to specify
            memory operands without index register.
          + Various  platform-specific performance improvements have been
            implemented; in particular, the compiler now uses the BRANCH ON
            COUNT family of instructions and makes more frequent use of the
            TEST UNDER MASK family of instructions.
     * The following changes have been made to the PowerPC port:
          + Support for IBM Power4 processor added.
          + Support for Motorola e500 SPE added.
          + Support for AIX 5.2 added.
          + Function and Data sections now supported on AIX.
          + Sibcall optimizations added.
     * The support for H8 Tiny is added to the H8/300 port with -mn.

Obsolete Systems

   Support for a number of older systems has been declared obsolete in GCC 3.3.
   Unless there is activity to revive them, the next release of GCC will have
   their sources permanently removed.

   All  configurations of the following processor architectures have been
   declared obsolete:
     * Matsushita MN10200, mn10200-*-*
     * Motorola 88000, m88k-*-*
     * IBM ROMP, romp-*-*

   Also, some individual systems have been obsoleted:
     * Alpha
          + Interix, alpha*-*-interix*
          + Linux libc1, alpha*-*-linux*libc1*
          + Linux ECOFF, alpha*-*-linux*ecoff*
     * ARM
          + Generic a.out, arm*-*-aout*
          + Conix, arm*-*-conix*
          + "Old ABI," arm*-*-oabi
          + StrongARM/COFF, strongarm-*-coff*
     * HPPA (PA-RISC)
          + Generic OSF, hppa1.0-*-osf*
          + Generic BSD, hppa1.0-*-bsd*
          + HP/UX versions 7, 8, and 9, hppa1.[01]-*-hpux[789]*
          + HiUX, hppa*-*-hiux*
          + Mach Lites, hppa*-*-lites*
     * Intel 386 family
          + Windows NT 3.x, i?86-*-win32
     * MC68000 family
          + HP systems, m68000-hp-bsd* and m68k-hp-bsd*
          + Sun systems, m68000-sun-sunos*, m68k-sun-sunos*, and m68k-sun-mach*
          + AT&T systems, m68000-att-sysv*
          + Atari systems, m68k-atari-sysv*
          + Motorola systems, m68k-motorola-sysv*
          + NCR systems, m68k-ncr-sysv*
          + Plexus systems, m68k-plexus-sysv*
          + Commodore systems, m68k-cbm-sysv*
          + Citicorp TTI, m68k-tti-*
          + Unos, m68k-crds-unos*
          + Concurrent RTU, m68k-ccur-rtu*
          + Linux a.out, m68k-*-linux*aout*
          + Linux libc1, m68k-*-linux*libc1*
          + pSOS, m68k-*-psos*
     * MIPS
          + Generic ECOFF, mips*-*-ecoff*
          + SINIX, mips-sni-sysv4
          + Orion RTEMS, mips64orion-*-rtems*
     * National Semiconductor 32000
          + OpenBSD, ns32k-*-openbsd*
     * POWER (aka RS/6000) and PowerPC
          + AIX versions 1, 2, and 3, rs6000-ibm-aix[123]*
          + Bull BOSX, rs6000-bull-bosx
          + Generic Mach, rs6000-*-mach*
          + Generic SysV, powerpc*-*-sysv*
          + Linux libc1, powerpc*-*-linux*libc1*
     * Sun SPARC
          + Generic a.out, sparc-*-aout*, sparclet-*-aout*, sparclite-*-aout*,
            and sparc86x-*-aout*
          + NetBSD a.out, sparc-*-netbsd*aout*
          + Generic BSD, sparc-*-bsd*
          + ChorusOS, sparc-*-chorusos*
          + Linux a.out, sparc-*-linux*aout*
          + Linux libc1, sparc-*-linux*libc1*
          + LynxOS, sparc-*-lynxos*
          + Solaris on HAL hardware, sparc-hal-solaris2*
          + SunOS versions 3 and 4, sparc-*-sunos[34]*
     * NEC V850
          + RTEMS, v850-*-rtems*
     * VAX
          + VMS, vax-*-vms*

Documentation improvements

Other significant improvements

     * Almost all front-end dependencies in the compiler have been separated
       out into a set of language hooks. This should make adding a new front
       end clearer and easier.
     * One effect of removing the separate preprocessor is a small increase in
       the robustness of the compiler in general, and the maintainability of
       target descriptions. Previously target-specific built-in macros and
       others, such as __FAST_MATH__, had to be handled with so-called specs
       that were hard to maintain. Often they would fail to behave properly
       when conflicting options were supplied on the command line, and define
       macros in the user's namespace even when strict ISO compliance was
       requested. Integrating the preprocessor has cleanly solved these issues.
     * The Makefile suite now supports redirection of make install by means of
       the variable DESTDIR.
     _________________________________________________________________

GCC 3.3

   Detailed release notes for the GCC 3.3 release follow.

  Bug Fixes

    bootstrap failures

     * [8]10140  cross  compiler  build failures: missing __mempcpy (DUP:
       [9]10198,[10]10338)

    Internal compiler errors (multi-platform)

     * [11]3581 large string causes segmentation fault in cc1
     * [12]4382 __builtin_{set,long}jmp with -O3 can crash the compiler
     * [13]5533 (c++) ICE when processing std::accumulate(begin, end, init,
       invalid_op)
     * [14]6387 -fpic -gdwarf-2 -g1 combination gives ICE in dwarf2out
     * [15]6412 (c++) ICE in retrieve_specialization
     * [16]6620  (c++)  partial  template  specialization  causes  an ICE
       (segmentation fault)
     * [17]6663 (c++) ICE with attribute aligned
     * [18]7068 ICE with incomplete types
     * [19]7083 (c++) ICE using -gstabs with dodgy class derivation
     * [20]7647 (c++) ICE when data member has the name of the enclosing class
     * [21]7675 ICE in fixup_var_refs_1
     * [22]7718 'complex' template instantiation causes ICE
     * [23]8116 (c++) ICE in member template function
     * [24]8358 (ada) Ada compiler accesses freed memory, crashes
     * [25]8511 (c++) ICE: (hopefully) reproducible cc1plus segmentation fault
     * [26]8564 (c++) ICE in find_function_data, in function.c
     * [27]8660 (c++) template overloading ICE in tsubst_expr, in cp/pt.c
     * [28]8766  (c++) ICE after failed initialization of static template
       variable
     * [29]8803 ICE in instantiate_virtual_regs_1, in function.c
     * [30]8846 (c++) ICE after diagnostic if fr_FR@euro locale is set
     * [31]8906  (c++) ICE (Segmentation fault) when parsing nested-class
       definition
     * [32]9216 (c++) ICE on missing template parameter
     * [33]9261 (c++) ICE in arg_assoc, in cp/decl2.c
     * [34]9263 (fortran) ICE caused by invalid PARAMETER in implied DO loop
     * [35]9429  (c++) ICE in template instantiation with a pointered new
       operator
     * [36]9516 Internal error when using a big array
     * [37]9600 (c++) ICE with typedefs in template class
     * [38]9629 (c++) virtual inheritance segfault
     * [39]9672 (c++) ICE: Error reporting routines re-entered
     * [40]9749 (c++) ICE in write_expression on invalid function prototype
     * [41]9794 (fortran) ICE: floating point exception during constant folding
     * [42]9829 (c++) Missing colon in nested namespace usage causes ICE
     * [43]9916 (c++) ICE with noreturn function in ?: statement
     * [44]9936 ICE with local function and variable-length 2d array
     * [45]10262 (c++) cc1plus crashes with large generated code
     * [46]10278 (c++) ICE in parser for invalid code
     * [47]10446 (c++) ICE on definition of nonexistent member function of
       nested class in a class template
     * [48]10451 (c++) ICE in grokdeclarator on spurious mutable declaration
     * [49]10506    (c++)    ICE   in   build_new   at   cp/init.c   with
       -fkeep-inline-functions and multiple inheritance
     * [50]10549 (c++) ICE in store_bit_field on bitfields that exceed the
       precision of the declared type

    Optimization bugs

     * [51]2001 Inordinately long compile times in reload CSE regs
     * [52]2391 Exponential compilation time explosion in combine
     * [53]2960 Duplicate loop conditions even with -Os
     * [54]4046 redundant conditional branch
     * [55]6405 Loop-unrolling related performance regressions
     * [56]6798 very long compile time with large case-statement
     * [57]6871 const objects shouldn't be moved to .bss
     * [58]6909 problem w/ -Os on modified loop-2c.c test case
     * [59]7189 gcc -O2 -Wall does not print ``control reaches end of non-void
       function'' warning
     * [60]7642 optimization problem with signbit()
     * [61]8634 incorrect code for inlining of memcpy under -O2
     * [62]8750 Cygwin prolog generation erroneously emitting __alloca as
       regular function call

    C front end

     * [63]2161 long if-else cascade overflows parser stack
     * [64]4319 short accepted on typedef'd char
     * [65]8602 incorrect line numbers in warning messages when using inline
       functions
     * [66]9177 -fdump-translation-unit: C front end deletes function_decl AST
       nodes and breaks debugging dumps
     * [67]9853 miscompilation of non-constant structure initializer

    c++ compiler and library

     * [68]45 legal template specialization code is rejected (DUP: [69]3784)
     * [70]764 lookup failure: friend operator and dereferencing a pointer and
       templates (DUP: [71]5116)
     * [72]2862 gcc accepts invalid explicit instantiation syntax (DUP: 2863)
     * [73]3663 G++ doesn't check access control during template instantiation
     * [74]3797 gcc fails to emit explicit specialization of a template member
     * [75]3948 Two destructors are called when no copy destructor is defined
       (ABI change)
     * [76]4137 Conversion operator within template is not accepted
     * [77]4361 bogus ambiguity taking the address of a member template
     * [78]4802 g++ accepts illegal template code (access to private member;
       DUP: [79]5837)
     * [80]4803 inline function is used but never defined, and g++ does not
       object
     * [81]5094 Partial specialization cannot be friend?
     * [82]5730 complex<double>::norm() -- huge slowdown from egcs-2.91.66
     * [83]6713 Regression wrt 3.0.4: g++ -O2 leads to seg fault at run time
     * [84]7015 certain __asm__ constructs rejected
     * [85]7086 compile time regression (quadratic behavior in fixup_var_refs)
     * [86]7099  G++  doesn't set the noreturn attribute on std::exit and
       std::abort
     * [87]7247  copy  constructor missing when inlining enabled (invalid
       optimization?)
     * [88]7441 string array initialization compilation time regression from
       seconds to minutes
     * [89]7768 __PRETTY_FUNCTION__ for template destructor is wrong
     * [90]7804 bad printing of floating point constant in warning message
     * [91]8099 Friend classes and template specializations
     * [92]8117 member function pointers and multiple inheritance
     * [93]8205 using declaration and multiple inheritance
     * [94]8645 unnecessary non-zero checks in stl_tree.h
     * [95]8724 explicit destructor call for incomplete class allowed
     * [96]8805 compile time regression with many member variables
     * [97]8691 -O3 and -fno-implicit-templates are incompatible
     * [98]8700 unhelpful error message for binding temp to reference
     * [99]8724 explicit destructor call for incomplete class allowed
     * [100]8949 numeric_limits<>::denorm_min() and is_iec559 problems
     * [101]9016 Failure to consistently constant fold "constant" C++ objects
     * [102]9053 g++ confused about ambiguity of overloaded function templates
     * [103]9152 undefined virtual thunks
     * [104]9182 basic_filebuf<> does not report errors in codecvt<>::out
     * [105]9297 data corruption due to codegen bug (when copying.)
     * [106]9318 i/ostream::operator>>/<<(streambuf*) broken
     * [107]9320 Incorrect usage of traits_type::int_type in stdio_filebuf
     * [108]9400 bogus -Wshadow warning: shadowed declaration of this in local
       classes
     * [109]9424 i/ostream::operator>>/<<(streambuf*) drops characters
     * [110]9425 filebuf::pbackfail broken (DUP: [111]9439)
     * [112]9474 GCC freezes in compiling a weird code mixing <iostream> and
       <iostream.h>
     * [113]9548 Incorrect results from setf(ios::fixed) and precision(-1)
       [114][DR 231]
     * [115]9555 ostream inserters fail to set badbit on exception
     * [116]9561 ostream inserters rethrow exception of wrong type
     * [117]9563 ostream::sentry returns true after a failed preparation
     * [118]9582 one-definition rule violation in std::allocator
     * [119]9622 __PRETTY_FUNCTION__ incorrect in template destructors
     * [120]9683 bug in initialization chains for static const variables from
       template classes
     * [121]9791 -Woverloaded-virtual reports hiding of destructor
     * [122]9817 collate::compare doesn't handle nul characters
     * [123]9825 filebuf::sputbackc breaks sbumpc
     * [124]9826 operator>>(basic_istream, basic_string) fails to compile with
       custom traits
     * [125]9924 Multiple using statements for builtin functions not allowed
     * [126]9946 destructor is not called for temporary object
     * [127]9964 filebuf::close() sometimes fails to close file
     * [128]9988 filebuf::overflow writes EOF to file
     * [129]10033 optimization breaks polymorphic references w/ typeid operator
     * [130]10097 filebuf::underflow drops characters
     * [131]10132 filebuf destructor can throw exceptions
     * [132]10180 gcc fails to warn about non-inlined function
     * [133]10199 method parametrized by template does not work everywhere
     * [134]10300 use of array-new (nothrow) in segfaults on NULL return
     * [135]10427 Stack corruption with variable-length automatic arrays and
       virtual destructors
     * [136]10503 Compilation never stops in fixed_type_or_null

    Objective-C

     * [137]5956 selectors aren't matched properly when added to the selector
       table

    Fortran compiler and library

     * [138]1832 list directed i/o overflow hangs, -fbounds-check doesn't
       detect
     * [139]3924 g77 generates code that is rejected by GAS if COFF debug info
       requested
     * [140]5634 doc: explain that configure --prefix=~/... does not work
     * [141]6367 multiple repeat counts confuse namelist read into array
     * [142]6491 Logical operations error on logicals when using -fugly-logint
     * [143]6742 Generation of C++ Prototype for FORTRAN and extern "C"
     * [144]7113 Failure of g77.f-torture/execute/f90-intrinsic-bit.f -Os on
       irix6.5
     * [145]7236 OPEN(...,RECL=nnn,...) without ACCESS='DIRECT' should assume a
       direct access file
     * [146]7278 g77 "bug"; the executable misbehaves (with -O2 -fno-automatic)
     * [147]7384 DATE_AND_TIME milliseconds field inactive on Windows
     * [148]7388 Incorrect output with 0-based array of characters
     * [149]8587 Double complex zero ** double precision number -> NaN instead
       of zero
     * [150]9038 -ffixed-line-length-none -x f77-cpp-input gives: Warning:
       unknown register name line-length-none
     * [151]10197 Direct access files not unformatted by default

    Java compiler and library

     * [152]6005 gcj fails to build rhug on alpha
     * [153]6389    System.getProperty("")   should   always   throw   an
       IllegalArgumentException
     * [154]6576 java.util.ResourceBundle.getResource ignores locale
     * [155]6652 new java.io.File("").getCanonicalFile() throws exception
     * [156]7060 getMethod() doesn't search super interface
     * [157]7073  bytecode  interpreter  gives wrong answer for interface
       getSuperclass()
     * [158]7180 possible bug in javax.naming.spi.NamingManager.getPlusPath()
     * [159]7416 java.security startup refs "GNU libgcj.security"
     * [160]7570 Runtime.exec with null envp: child doesn't inherit parent env
       (DUP: [161]7578)
     * [162]7611 Internal error while compiling libjava with -O
     * [163]7709 NullPointerException in _Jv_ResolvePoolEntry
     * [164]7766  ZipInputStream.available  returns  0  immediately after
       construction
     * [165]7785 Calendar.getTimeInMillis/setTimeInMillis should be public
     * [166]7786 TimeZone.getDSTSavings() from JDK1.4 not implemented
     * [167]8142 '$' in class names vs. dlopen 'dynamic string tokens'
     * [168]8234 ZipInputStream chokes when InputStream.read() returns small
       chunks
     * [169]8415 reflection bug: exception info for Method
     * [170]8481 java.Random.nextInt(int) may return negative
     * [171]8593 Error reading GZIPped files with BufferedReader
     * [172]8759   java.beans.Introspector   has   no   flushCaches()  or
       flushFromCaches() methods
     * [173]8997 spin() calls Thread.sleep
     * [174]9253 on win32, java.io.File.listFiles("C:\\") returns pwd instead
       of the root content of C:
     * [175]9254 java::lang::Object::wait(), threads-win32.cc returns wrong
       return codes
     * [176]9271 Severe bias in java.security.SecureRandom

    Ada compiler and library

     * [177]6767 make gnatlib-shared fails on -laddr2line
     * [178]9911   gnatmake  fails  to  link  when  GCC  configured  with
       --with-sjlj-exceptions=yes
     * [179]10020 Can't bootstrap gcc on AIX with Ada enabled
     * [180]10546 Ada tasking not working on Red Hat 9

    preprocessor

     * [181]7029 preprocessor should ignore #warning with -M

    ARM-specific

     * [182]2903 [arm] Optimization bug with long long arithmetic
     * [183]7873 arm-linux-gcc fails when assigning address to a bit field

    FreeBSD-specific

     * [184]7680  float  functions undefined in math.h/cmath with #define
       _XOPEN_SOURCE

    HP-UX or HP-PA-specific

     * [185]8705 [HP-PA] ICE in emit_move_insn_1, in expr.c
     * [186]9986  [HP-UX]  Incorrect  transformation of fputs_unlocked to
       fputc_unlocked
     * [187]10056 [HP-PA] ICE at -O2 when building c++ code from doxygen

    m68hc11-specific

     * [188]6744 Bad assembler code generated: reference to pseudo register z
     * [189]7361 Internal compiler error in reload_cse_simplify_operands, in
       reload1.c

    MIPS-specific

     * [190]9496 [mips-linux] bug in optimizer?

    PowerPC-specific

     * [191]7067 -Os with -mcpu=powerpc optimizes for speed (?) instead of
       space
     * [192]8480 reload ICEs for LAPACK code on powerpc64-linux
     * [193]8784 [AIX] Internal compiler error in simplify_gen_subreg
     * [194]10315 [powerpc] ICE: in extract_insn, in recog.c

    SPARC-specific

     * [195]10267 (documentation) Wrong build instructions for *-*-solaris2*

    x86-specific (Intel/AMD)

     * [196]7916 ICE in instantiate_virtual_register_1
     * [197]7926 (c++) i486 instructions in header files make c++ programs
       crash on i386
     * [198]8555 ICE in gen_split_1231
     * [199]8994 ICE with -O -march=pentium4
     * [200]9426 ICE with -fssa -funroll-loops -fprofile-arcs
     * [201]9806 ICE in inline assembly with -fPIC flag
     * [202]10077 gcc -msse2 generates movd to move dwords between xmm regs
     * [203]10233 64-bit comparison only comparing bottom 32-bits
     * [204]10286 type-punning doesn't work with __m64 and -O
     * [205]10308 [x86] ICE with -O -fgcse or -O2
     _________________________________________________________________

GCC 3.3.1

  Bug Fixes

   This section lists the problem reports (PRs) from GCC's bug tracking system
   that are known to be fixed in the 3.3.1 release. This list might not be
   complete (that is, it is possible that some PRs that have been fixed are not
   listed here).

    Bootstrap failures

     * [206]11272 [Solaris] make bootstrap fails while building libstdc++

    Internal compiler errors (multi-platform)

     * [207]5754 ICE on invalid nested template class
     * [208]6597 ICE in set_mem_alias_set compiling Qt with -O2 on ia64 and
       --enable-checking
     * [209]6949 (c++) ICE in tsubst_decl, in cp/pt.c
     * [210]7053 (c++) ICE when declaring a function already defined as a
       friend method of a template class
     * [211]8164 (c++) ICE when using different const expressions as template
       parameter
     * [212]8384 (c++) ICE in is_base_type, in dwarf2out.c
     * [213]9559 (c++) ICE with invalid initialization of a static const
     * [214]9649 (c++) ICE in finish_member_declaration, in cp/semantics.c when
       redeclaring a static member variable
     * [215]9864 (fortran) ICE in add_abstract_origin_attribute, in dwarfout.c
       with -g -O -finline-functions
     * [216]10432 (c++) ICE in poplevel, in cp/decl.c
     * [217]10475 ICE in subreg_highpart_offset for code with long long
     * [218]10635 (c++) ICE when dereferencing an incomplete type casted from a
       void pointer
     * [219]10661 (c++) ICE in instantiate_decl, in cp/pt.c while instantiating
       static member variables
     * [220]10700 ICE in copy_to_mode_reg on 64-bit targets
     * [221]10712 (c++) ICE in constructor_name_full, in cp/decl2.c
     * [222]10796 (c++) ICE when defining an enum with two values: -1 and
       MAX_INT_64BIT
     * [223]10890 ICE in merge_assigned_reloads building Linux 2.4.2x sched.c
     * [224]10939 (c++) ICE with template code
     * [225]10956 (c++) ICE when specializing a template member function of a
       template class, in tsubst, in cp/pt.c
     * [226]11041 (c++) ICE: const myclass &x = *x; (when operator*() defined)
     * [227]11059 (c++) ICE with empty union
     * [228]11083 (c++) ICE in commit_one_edge_insertion, in cfgrtl.c with -O2
       -fnon-call-exceptions
     * [229]11105 (c++) ICE in mangle_conv_op_name_for_type
     * [230]11149 (c++) ICE on error when instantiation with call function of a
       base type
     * [231]11228 (c++) ICE on new-expression using array operator new and
       default-initialization
     * [232]11282 (c++) Infinite memory usage after syntax error
     * [233]11301 (fortran) ICE with -fno-globals
     * [234]11308 (c++) ICE when using an enum type name as if it were a class
       or namespace
     * [235]11473 (c++) ICE with -gstabs when empty struct inherits from an
       empty struct
     * [236]11503 (c++) ICE when instantiating template with ADDR_EXPR
     * [237]11513 (c++) ICE in push_template_decl_real, in cp/pt.c: template
       member functions

    Optimization bugs

     * [238]11198  -O2  -frename-registers generates wrong code (aliasing
       problem)
     * [239]11304 Wrong code production with -fomit-frame-pointer
     * [240]11381 volatile memory access optimized away
     * [241]11536 [strength-reduce] -O2 optimization produces wrong code
     * [242]11557 constant folding bug generates wrong code

    C front end

     * [243]5897 No warning for statement after return
     * [244]11279 DWARF-2 output mishandles large enums

    Preprocessor bugs

     * [245]11022 no warning for non-compatible macro redefinition

    C++ compiler and library

     * [246]2330 static_cast<>() to a private base is allowed
     * [247]5388 Incorrect message "operands to ?: have different types"
     * [248]5390 Libiberty fails to demangle multi-digit template parameters
     * [249]7877 Incorrect parameter passing to specializations of member
       function templates
     * [250]9393 Anonymous namespaces and compiling the same file twice
     * [251]10032 -pedantic converts some errors to warnings
     * [252]10468 const typeof(x) is non-const, but only in templates
     * [253]10527 confused error message with "new int()" parameter initializer
     * [254]10679 parameter MIN_INLINE_INSNS is not honored
     * [255]10682 gcc chokes on a typedef for an enum inside a class template
     * [256]10689 pow(std::complex(0),1/3) returns (nan, nan) instead of 0.
     * [257]10845 template member function (with nested template as parameter)
       cannot be called anymore if another unrelated template member function
       is defined
     * [258]10849 Cannot define an out-of-class specialization of a private
       nested template class
     * [259]10888 Suppress -Winline warnings for system headers
     * [260]10929 -Winline warns about functions for which no definition is
       visible
     * [261]10931    valid    conversion    static_cast<const    unsigned
       int&>(lvalue-of-type-int) is rejected
     * [262]10940 Bad code with explicit specialization
     * [263]10968  If  member  function implicitly instantiated, explicit
       instantiation of class fails to instantiate it
     * [264]10990 Cannot convert with dynamic_cast<> to a private base class
       from within a member function
     * [265]11039 Bad interaction between implicit typename deprecation and
       friendship
     * [266]11062 (libstdc++) avoid __attribute__ ((unused)); say "__unused__"
       instead
     * [267]11095 C++ iostream manipulator causes segfault when called with
       negative argument
     * [268]11098 g++ doesn't emit complete debugging information for local
       variables in destructors
     * [269]11137 Linux shared library constructors not called unless there's
       one global object
     * [270]11154 spurious ambiguity report for template class specialization
     * [271]11329 Compiler cannot find user defined implicit typecast
     * [272]11332 Spurious error with casts in ?: expression
     * [273]11431 static_cast behavior with subclasses when default constructor
       available
     * [274]11528 money_get facet does not accept "$.00" as valid
     * [275]11546 Type lookup problems in out-of-line definition of a class
       doubly nested from a template class
     * [276]11567 C++ code containing templated member function with same name
       as pure virtual member function results in linking failure
     * [277]11645 Failure to deal with using and private inheritance

    Java compiler and library

     * [278]5179 Qualified static field access doesn't initialize its class
     * [279]8204 gcj -O2 to native reorders certain instructions improperly
     * [280]10838 java.io.ObjectInputStream syntax error
     * [281]10886 The RMI registry that comes with GCJ does not work correctly
     * [282]11349 JNDI URL context factories not located correctly

    x86-specific (Intel/AMD)

     * [283]4823 ICE on inline assembly code
     * [284]8878 miscompilation with -O and SSE
     * [285]9815  (c++  library)  atomicity.h - fails to compile with -O3
       -masm=intel
     * [286]10402 (inline assembly) [x86] ICE in merge_assigned_reloads, in
       reload1.c
     * [287]10504 ICE with SSE2 code and -O3 -mcpu=pentium4 -msse2
     * [288]10673 ICE for x86-64 on freebsd libc vfprintf.c source
     * [289]11044 [x86] out of range loop instructions for FP code on K6
     * [290]11089  ICE:  instantiate_virtual_regs_lossage while using SSE
       built-ins
     * [291]11420 [x86_64] gcc generates invalid asm code when "-O -fPIC" is
       used

    SPARC- or Solaris- specific

     * [292]9362 solaris 'as' dies when fed .s and "-gstabs"
     * [293]10142 [SPARC64] gcc produces wrong code when passing structures by
       value
     * [294]10663 New configure check aborts with Sun tools.
     * [295]10835 combinatorial explosion in scheduler on HyperSPARC
     * [296]10876 ICE in calculate_giv_inc when building KDE
     * [297]10955  wrong code at -O3 for structure argument in context of
       structure return
     * [298]11018 -mcpu=ultrasparc busts tar-1.13.25
     * [299]11556 [sparc64] ICE in gen_reg_rtx() while compiling 2.6.x Linux
       kernel

    ia64 specific

     * [300]10907 gcc violates the ia64 ABI (GP must be preserved)
     * [301]11320 scheduler bug (in machine depended reorganization pass)
     * [302]11599 bug with conditional and __builtin_prefetch

    PowerPC specific

     * [303]9745 [powerpc] gcc mis-compiles libmcrypt (alias problem during
       loop)
     * [304]10871 error in rs6000_stack_info save_size computation
     * [305]11440 gcc mis-compiles c++ code (libkhtml) with -O2, -fno-gcse
       cures it

    m68k-specific

     * [306]7594 [m68k] ICE on legal code associated with simplify-rtx
     * [307]10557 [m68k] ICE in subreg_offset_representable_p
     * [308]11054 [m68k] ICE in reg_overlap_mentioned_p

    ARM-specific

     * [309]10834 [arm] GCC 3.3 still generates incorrect instructions for
       functions with __attribute__ ((interrupt ("IRQ")))
     * [310]10842 [arm] Clobbered link register is copied to pc under certain
       circumstances
     * [311]11052 [arm] noce_process_if_block() can lose REG_INC notes
     * [312]11183 [arm] ICE in change_address_1 (3.3) / subreg_hard_regno (3.4)

    MIPS-specific

     * [313]11084 ICE in propagate_one_insn, in flow.c

    SH-specific

     * [314]10331 can't compile c++ part of gcc cross compiler for sh-elf
     * [315]10413 [SH] ICE in reload_cse_simplify_operands, in reload1.c
     * [316]11096 i686-linux to sh-linux cross compiler fails to compile C++
       files

    GNU/Linux (or Hurd?) specific

     * [317]2873 Bogus fixinclude of stdio.h from glibc 2.2.3

    UnixWare specific

     * [318]3163 configure bug: gcc/aclocal.m4 mmap test fails on UnixWare
       7.1.1

    Cygwin (or mingw) specific

     * [319]5287 ICE with dllimport attribute
     * [320]10148 [MingW/CygWin] Compiler dumps core

    DJGPP specific

     * [321]8787 GCC fails to emit .intel_syntax when invoked with -masm=intel
       on DJGPP

    Darwin (and MacOS X) specific

     * [322]10900 trampolines crash

    Documentation

     * [323]1607 (c++) Format attributes on methods undocumented
     * [324]4252 Invalid option `-fdump-translation-unit'
     * [325]4490    Clarify    restrictions    on    -m96bit-long-double,
       -m128bit-long-double
     * [326]10355 document an issue with regparm attribute on some systems
       (e.g. Solaris)
     * [327]10726 (fortran) Documentation for function "IDate Intrinsic (Unix)"
       is wrong
     * [328]10805 document bug in old version of Sun assembler
     * [329]10815 warn against GNU binutils on AIX
     * [330]10877 document need for newer binutils on i?86-*-linux-gnu
     * [331]11280 Manual incorrect with respect to -freorder-blocks
     * [332]11466 Document -mlittle-endian and its restrictions for the sparc64
       port

    Testsuite bugs (compiler itself is not affected)

     * [333]10737 newer bison causes g++.dg/parse/crash2.C to incorrectly
       report failure
     * [334]10810 gcc-3.3 fails make check: buffer overrun in test_demangle.c
     _________________________________________________________________

GCC 3.3.2

  Bug Fixes

   This section lists the problem reports (PRs) from [335]GCC's bug tracking
   system that are known to be fixed in the 3.3.2 release. This list might not
   be complete (that is, it is possible that some PRs that have been fixed are
   not listed here).

    Bootstrap failures and problems

     * [336]8336 [SCO5] bootstrap config still tries to use COFF options
     * [337]9330  [alpha-osf]  Bootstrap  failure  on  Compaq  Tru64 with
       --enable-threads=posix
     * [338]9631 [hppa64-linux] gcc-3.3 fails to bootstrap
     * [339]9877 fixincludes makes a bad sys/byteorder.h on svr5 (UnixWare
       7.1.1)
     * [340]11687 xstormy16-elf build fails in libf2c
     * [341]12263   [SGI   IRIX]   bootstrap   fails  during  compile  of
       libf2c/libI77/backspace.c
     * [342]12490 buffer overflow in scan-decls.c (during Solaris 9 fix-header
       processing)

    Internal compiler errors (multi-platform)

     * [343]7277 Casting integers to vector types causes ICE
     * [344]7939 (c++) ICE on invalid function template specialization
     * [345]11063 (c++) ICE on parsing initialization list of const array
       member
     * [346]11207 ICE with negative index in array element designator
     * [347]11522 (fortran) g77 dwarf-2 ICE in add_abstract_origin_attribute
     * [348]11595 (c++) ICE on duplicate label definition
     * [349]11646    (c++)    ICE   in   commit_one_edge_insertion   with
       -fnon-call-exceptions -fgcse -O
     * [350]11665 ICE in struct initializer when taking address
     * [351]11852 (c++) ICE with bad struct initializer.
     * [352]11878 (c++) ICE in cp_expr_size
     * [353]11883 ICE with any -O on mercury-generated C code
     * [354]11991 (c++) ICE in cxx_incomplete_type_diagnostic, in cp/typeck2.c
       when applying typeid operator to template template parameter
     * [355]12146 ICE in lookup_template_function, in cp/pt.c
     * [356]12215 ICE in make_label_edge with -fnon-call-exceptions -fno-gcse
       -O2
     * [357]12369 (c++) ICE with templates and friends
     * [358]12446 ICE in emit_move_insn on complicated array reference
     * [359]12510 ICE in final_scan_insn
     * [360]12544 ICE with large parameters used in nested functions

    C and optimization bugs

     * [361]9862 spurious warnings with -W -finline-functions
     * [362]10962 lookup_field is a linear search on a linked list (can be slow
       if large struct)
     * [363]11370 -Wunreachable-code gives false complaints
     * [364]11637 invalid assembly with -fnon-call-exceptions
     * [365]11885 Problem with bitfields in packed structs
     * [366]12082 Inappropriate unreachable code warnings
     * [367]12180 Inline optimization fails for variadic function
     * [368]12340 loop unroller + gcse produces wrong code

    C++ compiler and library

     * [369]3907 nested template parameter collides with member name
     * [370]5293 confusing message when binding a temporary to a reference
     * [371]5296 [DR115] Pointers to functions and to template functions behave
       differently in deduction
     * [372]7939 ICE on function template specialization
     * [373]8656 Unable to assign function with __attribute__ and pointer
       return type to an appropriate variable
     * [374]10147  Confusing  error message for invalid template function
       argument
     * [375]11400 std::search_n() makes assumptions about Size parameter
     * [376]11409 issues with using declarations, overloading, and built-in
       functions
     * [377]11740 ctype<wchar_t>::do_is(mask, wchar_t) doesn't handle multiple
       bits in mask
     * [378]11786 operator() call on variable in other namespace not recognized
     * [379]11867 static_cast ignores ambiguity
     * [380]11928 bug with conversion operators that are typedefs
     * [381]12114 Uninitialized memory accessed in dtor
     * [382]12163 static_cast + explicit constructor regression
     * [383]12181 Wrong code with comma operator and c++
     * [384]12236 regparm and fastcall messes up parameters
     * [385]12266 incorrect instantiation of unneeded template during overload
       resolution
     * [386]12296 istream::peek() doesn't set eofbit
     * [387]12298 [sjlj exceptions] Stack unwind destroys not-yet-constructed
       object
     * [388]12369 ICE with templates and friends
     * [389]12337 apparently infinite loop in g++
     * [390]12344 stdcall attribute ignored if function returns a pointer
     * [391]12451 missing(late) class forward declaration in cxxabi.h
     * [392]12486 g++ accepts invalid use of a qualified name

    x86 specific (Intel/AMD)

     * [393]8869  [x86  MMX] ICE with const variable optimization and MMX
       builtins
     * [394]9786 ICE in fixup_abnormal_edges with -fnon-call-exceptions -O2
     * [395]11689 g++3.3 emits un-assembleable code for k6 architecture
     * [396]12116 [k6] Invalid assembly output values with X-MAME code
     * [397]12070  ICE  converting  between  double  and long double with
       -msoft-float

    ia64-specific

     * [398]11184 [ia64 hpux] ICE on __builtin_apply building libobjc
     * [399]11535 __builtin_return_address may not work on ia64
     * [400]11693 [ia64] ICE in gen_nop_type
     * [401]12224 [ia64] Thread-local storage doesn't work

    PowerPC-specific

     * [402]11087 [powerpc64-linux] GCC miscompiles raid1.c from linux kernel
     * [403]11319 loop miscompiled on ppc32
     * [404]11949 ICE Compiler segfault with ffmpeg -maltivec code

    SPARC-specific

     * [405]11662 wrong code for expr. with cast to long long and exclusive or
     * [406]11965 invalid assembler code for a shift < 32 operation
     * [407]12301 (c++) stack corruption when a returned expression throws an
       exception

    Alpha-specific

     * [408]11717 [alpha-linux] unrecognizable insn compiling for.c of kernel
       2.4.22-pre8

    HPUX-specific

     * [409]11313 problem with #pragma weak and static inline functions
     * [410]11712 __STDC_EXT__ not defined for C++ by default anymore?

    Solaris specific

     * [411]12166 Profiled programs crash if PROFDIR is set

    Solaris-x86 specific

     * [412]12101 i386 Solaris no longer works with GNU as?

    Miscellaneous embedded target-specific bugs

     * [413]10988 [m32r-elf] wrong blockmove code with -O3
     * [414]11805 [h8300-unknown-coff] [H8300] ICE for simple code with -O2
     * [415]11902 [sh4] spec file improperly inserts rpath even when none
       needed
     * [416]11903 [sh4] -pthread fails to link due to error in spec file on sh4
     _________________________________________________________________

GCC 3.3.3

  Minor features

   In addition to the bug fixes documented below, this release contains few
   minor features such as:
     * Support for --with-sysroot
     * Support for automatic detection of executable stacks
     * Support for SSE3 instructions
     * Support for thread local storage debugging under GDB on S390

  Bug Fixes

   This section lists the problem reports (PRs) from [417]GCC's bug tracking
   system that are known to be fixed in the 3.3.3 release. This list might not
   be complete (that is, it is possible that some PRs that have been fixed are
   not listed here).

    Bootstrap failures and issues

     * [418]11890 Building cross gcc-3.3.1 for sparc-sun-solaris2.6 fails
     * [419]12399 boehm-gc fails (when building a cross compiler): libtool
       unable to infer tagged configuration
     * [420]13068   mklibgcc.in   doesn't   handle  multi-level  multilib
       subdirectories properly

    Internal compiler errors (multi-platform)

     * [421]10060  ICE  (stack overflow) on huge file (300k lines) due to
       recursive behaviour of copy_rtx_if_shared, in emit_rtl.c
     * [422]10555 (c++) ICE on undefined template argument
     * [423]10706 (c++) ICE in mangle_class_name_for_template
     * [424]11496 (fortran) error in flow_loops_find when -funroll-loops active
     * [425]11741 ICE in pre_insert_copy_insn, in gcse.c
     * [426]12440 GCC crashes during compilation of quicktime4linux 2.0.0
     * [427]12632 (fortran) -fbounds-check ICE
     * [428]12712 (c++) ICE on short legit C++ code fragment with gcc 3.3.2
     * [429]12726 (c++) ICE (segfault) on trivial code
     * [430]12890 (c++) ICE on compilation of class with throwing method
     * [431]12900 (c++) ICE in rtl_verify_flow_info_1
     * [432]13060 (fortran) ICE in fixup_var_refs_1, in function.c on correct
       code with -O2 -fno-force-mem
     * [433]13289 (c++) ICE in regenerate_decl_from_template on recursive
       template
     * [434]13318 ICE: floating point exception in the loop optimizer
     * [435]13392 (c++) ICE in convert_from_eh_region_ranges_1, in except.c
     * [436]13574 (c++) invalid array default initializer in class lets gcc
       consume all memory and die
     * [437]13475 ICE on SIMD variables with partial value initialization
     * [438]13797 (c++) ICE on invalid template parameter
     * [439]13824 (java) gcj SEGV with simple .java program

    C and optimization bugs

     * [440]8776 loop invariants are not removed (most likely)
     * [441]10339 [sparc,ppc,ppc64] Invalid optimization: replacing strncmp by
       memcmp
     * [442]11350 undefined labels with -Os -fPIC
     * [443]12826 Optimizer removes reference through volatile pointer
     * [444]12500 stabs debug info: void no longer a predefined / builtin type
     * [445]12941 builtin-bitops-1.c miscompilation (latent bug)
     * [446]12953 tree inliner bug (in inline_forbidden_p) and fix
     * [447]13041 linux-2.6/sound/core/oss/rate.c miscompiled
     * [448]13507 spurious printf format warning
     * [449]13382  Type  information  for const pointer disappears during
       optimization.
     * [450]13394 noreturn attribute ignored on recursive invokation
     * [451]13400 Compiled code crashes storing to read-only location
     * [452]13521 Endless loop in calculate_global_regs_live

    C++ compiler and library

   Some of the bug fixes in this list were made to implement decisions that the
   ISO C++ standards committee has made concerning several defect reports
   (DRs). Links in the list below point to detailed discussion of the relevant
   defect report.
     * [453]2094  unimplemented:  use  of  `ptrmem_cst'  in template type
       unification
     * [454]2294 using declaration confusion
     * [455]5050 template instantiation depth exceeds limit: recursion problem?
     * [456]9371 Bad exception handling in i/ostream::operator>>/<<(streambuf*)
     * [457]9546 bad exception handling in ostream members
     * [458]10081 basic_ios::_M_cache_locale leaves NULL members in the face of
       unknown locales
     * [459]10093 [460][DR 61] Setting failbit in exceptions doesn't work
     * [461]10095 istream::operator>>(int&) sets ios::badbit when ios::failbit
       is set.
     * [462]11554 Warning about reordering of initializers doesn't mention
       location of constructor
     * [463]12297 istream::sentry::sentry() handles eof() incorrectly.
     * [464]12352 Exception safety problems in src/localename.cc
     * [465]12438 Memory leak in locale::combine()
     * [466]12540 Memory leak in locale::locale(const char*)
     * [467]12594 DRs [468]60 [TC] and [469]63 [TC] not implemented
     * [470]12657 Resolution of [471]DR 292 (WP) still unimplemented
     * [472]12696 memory eating infinite loop in diagnostics (error recovery
       problem)
     * [473]12815 Code compiled with optimization behaves unexpectedly
     * [474]12862  Conflicts  between typedefs/enums and namespace member
       declarations
     * [475]12926  Wrong  value after assignment in initialize list using
       bit-fields
     * [476]12967 Resolution of [477]DR 300 [WP] still unimplemented
     * [478]12971 Resolution of [479]DR 328 [WP] still unimplemented
     * [480]13007 basic_streambuf::pubimbue, imbue wrong
     * [481]13009 Implicitly-defined assignment operator writes to wrong memory
     * [482]13057 regparm attribute not applied to destructor
     * [483]13070 -Wformat option ignored in g++
     * [484]13081 forward template declarations in <complex> let inlining fail
     * [485]13239 Assertion does not seem to work correctly anymore
     * [486]13262 "xxx is private within this context" when initializing a
       self-contained template class
     * [487]13290 simple typo in concept checking for std::generate_n
     * [488]13323 Template code does not compile in presence of typedef
     * [489]13369 __verify_grouping (and __add_grouping?) not correct
     * [490]13371 infinite loop with packed struct and inlining
     * [491]13445 Template argument replacement "dereferences" a typedef
     * [492]13461 Fails to access protected-ctor from public constant
     * [493]13462 Non-standard-conforming type set::pointer
     * [494]13478 gcc uses wrong constructor to initialize a const reference
     * [495]13544 "conflicting types" for enums in different scopes
     * [496]13650 string::compare should not (always) use traits_type::length()
     * [497]13683 bogus warning about passing non-PODs through ellipsis
     * [498]13688 Derived class is denied access to protected base class member
       class
     * [499]13774 Member variable cleared in virtual multiple inheritance class
     * [500]13884 Protect sstream.tcc from extern template use

    Java compiler and library

     * [501]10746 [win32] garbage collection crash in GCJ

    Objective-C compiler and library

     * [502]11433  Crash  due to dereferencing null pointer when querying
       protocol

    Fortran compiler and library

     * [503]12633 logical expression gives incorrect result with -fugly-logint
       option
     * [504]13037 [gcse-lm] g77 generates incorrect code
     * [505]13213 Hex constant problem when compiling with -fugly-logint and
       -ftypeless-boz

    x86-specific (Intel/AMD)

     * [506]4490 ICE with -m128bit-long-double
     * [507]12292 [x86_64] ICE: RTL check: expected code `const_int', have
       `reg' in make_field_assignment, in combine.c
     * [508]12441 ICE: can't find a register to spill
     * [509]12943 array static-init failure under -fpic, -fPIC
     * [510]13608 Incorrect code with -O3 -ffast-math

    PowerPC-specific

     * [511]11598  testcase  gcc.dg/20020118-1.c  fails  runtime check of
       __attribute__((aligned(16)))
     * [512]11793 ICE in extract_insn, in recog.c (const_vector's)
     * [513]12467  vmsumubm  emitted  when  vmsummbm appropriate (typo in
       altivec.md)
     * [514]12537 g++ generates writeable text sections

    SPARC-specific

     * [515]12496 wrong result for __atomic_add(&value, -1) when using -O0 -m64
     * [516]12865 mprotect call to make trampoline executable may fail
     * [517]13354 ICE in sparc_emit_set_const32

    ARM-specific

     * [518]10467 [arm] ICE in pre_insert_copy_insn,

    ia64-specific

     * [519]11226 ICE passing struct arg with two floats
     * [520]11227 ICE for _Complex float, _Complex long double args
     * [521]12644 GCC 3.3.2 fails to compile glibc on ia64
     * [522]13149 build gcc-3.3.2 1305 error:unrecognizable insn
     * Various fixes for libunwind

    Alpha-specific

     * [523]12654 Incorrect comparison code generated for Alpha
     * [524]12965 SEGV+ICE in cc1plus on alpha-linux with -O2
     * [525]13031 ICE (unrecognizable insn) when building gnome-libs-1.4.2

    HPPA-specific

     * [526]11634 [hppa] ICE in verify_local_live_at_start, in flow.c
     * [527]12158 [hppa] compilation does not terminate at -O1

    S390-specific

     * [528]11992  Wrong built-in code for memcmp with length 1<<24: only
       (1<<24)-1 possible for CLCL-Instruction

    SH-specific

     * [529]9365 segfault in gen_far_branch (config/sh/sh.c)
     * [530]10392 optimizer generates faulty array indexing
     * [531]11322 SH profiler outputs multiple definitions of symbol
     * [532]13069 gcc/config/sh/rtems.h broken
     * [533]13302 Putting a va_list in a struct causes seg fault
     * [534]13585 Incorrect optimization of call to sfunc
     * Fix inappropriately exported libgcc functions from the shared library

    Other embedded target specific

     * [535]8916 [mcore] unsigned char assign gets hosed.
     * [536]11576 [h8300] ICE in change_address_1, in emit-rtl.c
     * [537]13122 [h8300] local variable gets corrupted by function call when
       -fomit-frame-pointer is given
     * [538]13256 [cris] strict_low_part mistreated in delay slots
     * [539]13373   [mcore]   optimization   with  -frerun-cse-after-loop
       -fexpensive-optimizations produces wrong code on mcore

    GNU HURD-specific

     * [540]12561 gcc/config/t-gnu needs updating to work with --with-sysroot

    Tru64 Unix specific

     * [541]6243  testsuite  fails  almost all tests due to no libintl in
       LD_LIBRARY_PATH during test.
     * [542]11397 weak aliases broken on Tru64 UNIX

    AIX-specific

     * [543]12505  build failure due to defines of uchar in cpphash.h and
       sys/types.h
     * [544]13150 WEAK symbols not exported by collect2

    IRIX-specific

     * [545]12666 fixincludes problem on IRIX 6.5.19m

    Solaris-specific

     * [546]12969 Including sys/byteorder.h breaks configure checks

    Testsuite problems (compiler is not affected)

     * [547]10819 testsuite creates CR+LF on compiler version lines in test
       summary files
     * [548]11612 abi_check not finding correct libgcc_s.so.1

    Miscellaneous

     * [549]13211 using -###, incorrect warnings about unused linker file are
       produced
     _________________________________________________________________

GCC 3.3.4

   This is the [550]list of problem reports (PRs) from GCC's bug tracking
   system that are known to be fixed in the 3.3.4 release. This list might not
   be complete (that is, it is possible that some PRs that have been fixed are
   not listed here).
     _________________________________________________________________

GCC 3.3.5

   This is the [551]list of problem reports (PRs) from GCC's bug tracking
   system that are known to be fixed in the 3.3.5 release. This list might not
   be complete (that is, it is possible that some PRs that have been fixed are
   not listed here).
     _________________________________________________________________

GCC 3.3.6

   This is the [552]list of problem reports (PRs) from GCC's bug tracking
   system that are known to be fixed in the 3.3.6 release. This list might not
   be complete (that is, it is possible that some PRs that have been fixed are
   not listed here).

   Please send FSF & GNU inquiries & questions to [553]gnu@gnu.org. There are
   also [554]other ways to contact the FSF.

   These pages are maintained by [555]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [556]GCC manuals. If that fails, the [557]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [558]gcc@gnu.org or [559]gcc@gcc.gnu.org. All of
    our lists have [560]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-11-12 [561]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.6
   2. http://gcc.gnu.org/gcc-3.1/changes.html#obsolete_systems
   3. http://gcc.gnu.org/gcc-3.3/changes.html#obsolete_systems
   4. http://gcc.gnu.org/gcc-3.3/changes.html#nonnull_attribute
   5. http://gcc.gnu.org/news/dfa.html
   6. http://gcc.gnu.org/gcc-3.3/c99status.html
   7. http://gcc.gnu.org/onlinedocs/gcc-3.3.6/g77/News.html
   8. http://gcc.gnu.org/PR10140
   9. http://gcc.gnu.org/PR10198
  10. http://gcc.gnu.org/PR10338
  11. http://gcc.gnu.org/PR3581
  12. http://gcc.gnu.org/PR4382
  13. http://gcc.gnu.org/PR5533
  14. http://gcc.gnu.org/PR6387
  15. http://gcc.gnu.org/PR6412
  16. http://gcc.gnu.org/PR6620
  17. http://gcc.gnu.org/PR6663
  18. http://gcc.gnu.org/PR7068
  19. http://gcc.gnu.org/PR7083
  20. http://gcc.gnu.org/PR7647
  21. http://gcc.gnu.org/PR7675
  22. http://gcc.gnu.org/PR7718
  23. http://gcc.gnu.org/PR8116
  24. http://gcc.gnu.org/PR8358
  25. http://gcc.gnu.org/PR8511
  26. http://gcc.gnu.org/PR8564
  27. http://gcc.gnu.org/PR8660
  28. http://gcc.gnu.org/PR8766
  29. http://gcc.gnu.org/PR8803
  30. http://gcc.gnu.org/PR8846
  31. http://gcc.gnu.org/PR8906
  32. http://gcc.gnu.org/PR9216
  33. http://gcc.gnu.org/PR9261
  34. http://gcc.gnu.org/PR9263
  35. http://gcc.gnu.org/PR9429
  36. http://gcc.gnu.org/PR9516
  37. http://gcc.gnu.org/PR9600
  38. http://gcc.gnu.org/PR9629
  39. http://gcc.gnu.org/PR9672
  40. http://gcc.gnu.org/PR9749
  41. http://gcc.gnu.org/PR9794
  42. http://gcc.gnu.org/PR9829
  43. http://gcc.gnu.org/PR9916
  44. http://gcc.gnu.org/PR9936
  45. http://gcc.gnu.org/PR10262
  46. http://gcc.gnu.org/PR10278
  47. http://gcc.gnu.org/PR10446
  48. http://gcc.gnu.org/PR10451
  49. http://gcc.gnu.org/PR10506
  50. http://gcc.gnu.org/PR10549
  51. http://gcc.gnu.org/PR2001
  52. http://gcc.gnu.org/PR2391
  53. http://gcc.gnu.org/PR2960
  54. http://gcc.gnu.org/PR4046
  55. http://gcc.gnu.org/PR6405
  56. http://gcc.gnu.org/PR6798
  57. http://gcc.gnu.org/PR6871
  58. http://gcc.gnu.org/PR6909
  59. http://gcc.gnu.org/PR7189
  60. http://gcc.gnu.org/PR7642
  61. http://gcc.gnu.org/PR8634
  62. http://gcc.gnu.org/PR8750
  63. http://gcc.gnu.org/PR2161
  64. http://gcc.gnu.org/PR4319
  65. http://gcc.gnu.org/PR8602
  66. http://gcc.gnu.org/PR9177
  67. http://gcc.gnu.org/PR9853
  68. http://gcc.gnu.org/PR45
  69. http://gcc.gnu.org/PR3784
  70. http://gcc.gnu.org/PR764
  71. http://gcc.gnu.org/PR5116
  72. http://gcc.gnu.org/PR2862
  73. http://gcc.gnu.org/PR3663
  74. http://gcc.gnu.org/PR3797
  75. http://gcc.gnu.org/PR3948
  76. http://gcc.gnu.org/PR4137
  77. http://gcc.gnu.org/PR4361
  78. http://gcc.gnu.org/PR4802
  79. http://gcc.gnu.org/PR5837
  80. http://gcc.gnu.org/PR4803
  81. http://gcc.gnu.org/PR5094
  82. http://gcc.gnu.org/PR5730
  83. http://gcc.gnu.org/PR6713
  84. http://gcc.gnu.org/PR7015
  85. http://gcc.gnu.org/PR7086
  86. http://gcc.gnu.org/PR7099
  87. http://gcc.gnu.org/PR7247
  88. http://gcc.gnu.org/PR7441
  89. http://gcc.gnu.org/PR7768
  90. http://gcc.gnu.org/PR7804
  91. http://gcc.gnu.org/PR8099
  92. http://gcc.gnu.org/PR8117
  93. http://gcc.gnu.org/PR8205
  94. http://gcc.gnu.org/PR8645
  95. http://gcc.gnu.org/PR8724
  96. http://gcc.gnu.org/PR8805
  97. http://gcc.gnu.org/PR8691
  98. http://gcc.gnu.org/PR8700
  99. http://gcc.gnu.org/PR8724
 100. http://gcc.gnu.org/PR8949
 101. http://gcc.gnu.org/PR9016
 102. http://gcc.gnu.org/PR9053
 103. http://gcc.gnu.org/PR9152
 104. http://gcc.gnu.org/PR9182
 105. http://gcc.gnu.org/PR9297
 106. http://gcc.gnu.org/PR9318
 107. http://gcc.gnu.org/PR9320
 108. http://gcc.gnu.org/PR9400
 109. http://gcc.gnu.org/PR9424
 110. http://gcc.gnu.org/PR9425
 111. http://gcc.gnu.org/PR9439
 112. http://gcc.gnu.org/PR9474
 113. http://gcc.gnu.org/PR9548
 114. http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#231
 115. http://gcc.gnu.org/PR9555
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 117. http://gcc.gnu.org/PR9563
 118. http://gcc.gnu.org/PR9582
 119. http://gcc.gnu.org/PR9622
 120. http://gcc.gnu.org/PR9683
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 123. http://gcc.gnu.org/PR9825
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 125. http://gcc.gnu.org/PR9924
 126. http://gcc.gnu.org/PR9946
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 561. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.2/index.html

                           GCC 3.2 Release Series

   April 25, 2003

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.2.3.

   The purpose of the GCC 3.2 release series is to provide a stable platform
   for OS distributors to use building their next releases. A primary objective
   was to stabilize the C++ ABI; we believe that the interface to the compiler
   and the C++ standard library are now relatively stable.

   Be  aware  that  C++  code compiled by GCC 3.2.x will (in general) not
   interoperate with code compiled by GCC 3.1.1 or earlier.

   Please refer to our [2]detailed list of news, caveats, and bug-fixes for
   further information.

Release History

   GCC 3.2.3
          April 25, 2003 ([3]changes)

   GCC 3.2.2
          February 5, 2003 ([4]changes)

   GCC 3.2.1
          November 19, 2002 ([5]changes)

   GCC 3.2
          August 14, 2002 ([6]changes)

References and Acknowledgements

   GCC used to stand for the GNU C Compiler, but since the compiler supports
   several other languages aside from C, it now stands for the GNU Compiler
   Collection.

   A  list  of [7]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed new features, improvements, bug fixes, and other changes as well
   as test results to GCC. This [8]amazing group of volunteers is what makes
   GCC successful.

   For additional information about GCC please refer to the [9]GCC project web
   site or contact the [10]GCC development mailing list.

   To obtain GCC please use [11]our mirror sites, one of the [12]GNU mirror
   sites, or our CVS server.

   Please send FSF & GNU inquiries & questions to [13]gnu@gnu.org. There are
   also [14]other ways to contact the FSF.

   These pages are maintained by [15]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [16]GCC manuals. If that fails, the [17]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [18]gcc@gnu.org or [19]gcc@gcc.gnu.org. All of
    our lists have [20]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [21]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://gcc.gnu.org/gcc-3.2/changes.html
   3. http://gcc.gnu.org/gcc-3.2/changes.html#3.2.3
   4. http://gcc.gnu.org/gcc-3.2/changes.html#3.2.2
   5. http://gcc.gnu.org/gcc-3.2/changes.html#3.2.1
   6. http://gcc.gnu.org/gcc-3.2/changes.html#3.2
   7. http://gcc.gnu.org/gcc-3.2/buildstat.html
   8. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   9. http://gcc.gnu.org/index.html
  10. mailto:gcc@gcc.gnu.org
  11. http://gcc.gnu.org/mirrors.html
  12. http://www.gnu.org/order/ftp.html
  13. mailto:gnu@gnu.org
  14. http://www.gnu.org/home.html#ContactInfo
  15. http://gcc.gnu.org/about.html
  16. http://gcc.gnu.org/onlinedocs/
  17. mailto:gcc-help@gcc.gnu.org
  18. mailto:gcc@gnu.org
  19. mailto:gcc@gcc.gnu.org
  20. http://gcc.gnu.org/lists.html
  21. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.2/changes.html

                           GCC 3.2 Release Series
                      Changes, New Features, and Fixes

   The latest release in the 3.2 release series is [1]GCC 3.2.3.

Caveats and New Features

  Caveats

     * The C++ compiler does not correctly zero-initialize pointers-to-data
       members. You must explicitly initialize them. For example: int S::*m(0);
       will work, but depending on default-initialization to zero will not
       work. This bug cannot be fixed in GCC 3.2 without inducing unacceptable
       risks. It will be fixed in GCC 3.3.
     * This GCC release is based on the GCC 3.1 sourcebase, and thus has all
       the [2]changes in the GCC 3.1 series. In addition, GCC 3.2 has a number
       of C++ ABI fixes which make its C++ compiler generate binary code which
       is incompatible with the C++ compilers found in earlier GCC releases,
       including GCC 3.1 and GCC 3.1.1.

  Frontend Enhancements

    C/C++/Objective-C

     * The method of constructing the list of directories to be searched for
       header files has been revised. If a directory named by a -I option is a
       standard system include directory, the option is ignored to ensure that
       the  default  search  order for system directories and the special
       treatment of system header files are not defeated.
     * The C and Objective-C compilers no longer accept the "Naming Types"
       extension (typedef foo = bar); it was already unavailable in C++. Code
       which uses it will need to be changed to use the "typeof" extension
       instead:  typedef typeof(bar) foo. (We have removed this extension
       without a period of deprecation because it has caused the compiler to
       crash since version 3.0 and no one noticed until very recently. Thus we
       conclude it is not in widespread use.)

    C++

     * GCC 3.2 fixed serveral differences between the C++ ABI implemented in
       GCC and the multi-vendor standard, but more have been found since the
       release. 3.2.1 adds a new warning, -Wabi, to warn about code which is
       affected by these bugs. We will fix these bugs in some future release,
       once we are confident that all have been found; until then, it is our
       intention to make changes to the ABI only if they are necessary for
       correct  compilation  of C++, as opposed to conformance to the ABI
       documents.
     * For details on how to build an ABI compliant compiler for GNU/Linux
       systems, check the [3]common C++ ABI page.

  New Targets and Target Specific Improvements

    IA-32

     * Fixed a number of bugs in SSE and MMX intrinsics.
     * Fixed common compiler crashes with SSE instruction set enabled (implied
       by -march=pentium3, pentium4, athlon-xp)
     * __m128 and __m128i is not 128bit aligned when used in structures.

    x86-64

     * A bug whereby the compiler could generate bad code for bzero has been
       fixed.
     * ABI fixes (implying ABI incompatibilities with previous version in some
       corner cases)
     * Fixed prefetch code generation
     _________________________________________________________________

GCC 3.2.3

   3.2.3 is a bug fix release only; there are no new features that were not
   present in GCC 3.2.2.

  Bug Fixes

   This section lists the problem reports (PRs) from GCC's bug tracking system
   that are known to be fixed in the 3.2.3 release. This list might not be
   complete (that is, it is possible that some PRs that have been fixed are not
   listed here), and some of the titles have been changed to make them more
   clear.

    Internal Compiler Errors (multi-platform)

     * [4]3782: (c++) -quiet -fstats produces a segmentation fault in cc1plus
     * [5]6440: (c++) template specializations cause ICE
     * [6]7050: (c++) ICE on: (i ? get_string() : throw)
     * [7]7741: ICE on conflicting types (make_decl_rtl in varasm.c)
     * [8]7982: (c++) ICE due to infinite recursion (using STL set)
     * [9]8068: exceedingly high (infinite) memory usage
     * [10]8178: ICE with __builtin_ffs
     * [11]8396: ICE in copy_to_mode_reg, in explow.c
     * [12]8674: (c++) ICE in cp_expr_size, in cp/cp-lang.c
     * [13]9768: ICE when optimizing inline code at -O2
     * [14]9798:     (c++)     Infinite     recursion    (segfault)    in
       cp/decl.c:push_using_directive with recursive using directives
     * [15]9799: mismatching structure initializer with nested flexible array
       member: ICE
     * [16]9928: ICE on duplicate enum declaration
     * [17]10114: ICE in mem_loc_descriptor, in dwarf2out.c (affects sparc,
       alpha)
     * [18]10352: ICE in find_reloads_toplev
     * [19]10336: ICE with -Wunreachable-code

    C/optimizer bugs:

     * [20]8224: Incorrect joining of signed and unsigned division
     * [21]8613: -O2 produces wrong code with builtin strlen and postincrements
     * [22]8828: gcc reports some code is unreachable when it is not
     * [23]9226: GCSE breaking argument passing
     * [24]9853: miscompilation of non-constant structure initializer
     * [25]9797: C99-style struct initializers are miscompiled
     * [26]9967: Some standard C function calls should not be replaced when
       optimizing for size
     * [27]10116:  ce2: invalid merge of join_bb in the context of switch
       statements
     * [28]10171: wrong code for inlined function
     * [29]10175: -Wunreachable-code doesn't work for single lines

    C++ compiler and library:

     * [30]8316:  Confusing  diagnostic  for code that misuses conversion
       operators
     * [31]9169: filebuf output fails if codecvt<>::out returns noconv
     * [32]9420: incomplete type incorrectly reported
     * [33]9459: typeof in return type specification of template not supported
     * [34]9507: filebuf::open handles ios_base::ate incorrectly
     * [35]9538: Out-of-bounds memory access in streambuf::sputbackc
     * [36]9602: Total confusion about template/friend/virtual/abstract
     * [37]9993: destructor not called for local object created within and
       returned from infinite loop
     * [38]10167: ieee_1003.1-2001 locale specialisations on a glibc-2.3.2
       system

    Java compiler and library:

     * [39]9652: libgcj build fails on irix6.5.1[78]
     * [40]10144: gas on solaris complains about bad .stabs lines for java,
       native as unaffected

    x86-specific (Intel/AMD):

     * [41]8746: gcc miscompiles Linux kernel ppa driver on x86
     * [42]9888: -mcpu=k6 -Os produces out of range loop instructions
     * [43]9638: Cross-build for target i386-elf and i586-pc-linux-gnu failed
     * [44]9954: Cross-build for target i586-pc-linux-gnu (--with-newlib)
       failed

    SPARC-specific:

     * [45]7784: [Sparc] ICE in extract_insn, in recog.c
     * [46]7796:  sparc  extra failure with -m64 on execute/930921-1.c in
       unroll.c
     * [47]8281: ICE when compiling with -O2 -fPIC for Ultrasparc
     * [48]8366:  [Sparc]  C  testsuite  failure  with  -m64  -fpic -O in
       execute/loop-2d.c
     * [49]8726: gcc -O2 miscompiles Samba 2.2.7 on 32-bit sparc
     * [50]9414: Scheduling bug on Ultrasparc
     * [51]10067: GCC-3.2.2 outputs invalid asm on sparc64

    m68k-specific:

     * [52]7248: broken "inclusive or" code
     * [53]8343: m68k-elf/rtems ICE at instantiate_virtual_regs_1

    PowerPC-specific:

     * [54]9732: Wrong code with -O2 -fPIC
     * [55]10073: ICE: powerpc cannot split insn

    Alpha-specific:

     * [56]7702: optimization problem on a DEC alpha under OSF1
     * [57]9671: gcc.3.2.2 does not build on a HP Tru64 Unix v5.1B system

    HP-specific:

     * [58]8694: <string> breaks <ctype.h> on HP-UX 10.20 (DUP: 9275)
     * [59]9953:  (ada)  gcc 3.2.x can't build 3.3-branch ada on HP-UX 10
       (missing symbol)
     * [60]10271: Floating point args don't get reloaded across function calls
       with -O2

    MIPS specific:

     * [61]6362:  mips-irix6  gcc-3.1  C testsuite failure with -mips4 in
       compile/920501-4.c

    CRIS specific:

     * [62]10377: gcc-3.2.2 creates bad assembler code for cris

    Miscellaneous and minor bugs:

     * [63]6955: collect2 says "core dumped" when there is no core
     _________________________________________________________________

GCC 3.2.2

   Beginning with 3.2.2, GCC's Makefile suite supports redirection of make
   install  by  means of the DESTDIR variable. Parts of the GCC tree have
   featured that support long before, but now it is available even from the top
   level.

   Other than that, GCC 3.2.2 is a bug fix release only; there are no new
   features that were not present in GCC 3.2.1.

  Bug Fixes

   On the following i386-based systems GCC 3.2.1 broke the C ABI wrt. functions
   returning structures: Cygwin, FreeBSD (GCC 3.2.1 as shipped with FreeBSD 5.0
   does not have this problem), Interix, a.out-based Linux and NetBSD, OpenBSD,
   and  Darwin.  GCC  3.2.2  reverts  this  ABI change, and thus restores
   ABI-compatibility  with  previous releases (except GCC 3.2.1) on these
   platforms.

   This section lists the problem reports (PRs) from GCC's bug tracking system
   that are known to be fixed in the 3.2.2 release. This list might not be
   complete (that is, it is possible that some PRs that have been fixed are not
   listed here) and some of the titles have been changed to make them more
   clear.

    Internal Compiler Errors (multi-platform)

     * [64]5919: (c++) ICE when passing variable array to template function
     * [65]7129: (c++) ICE with min/max assignment operators (<?= and >?=)
     * [66]7507: ICE with -O2 when address of called function is a complicated
       expression
     * [67]7622: ICE with nested inline functions if function's address is
       taken
     * [68]7681: (fortran) ICE in compensate_edge, in reg-stack.c (also PR
       [69]9258)
     * [70]8031: (c++) ICE in code comparing typeids and casting from virtual
       base
     * [71]8275: ICE in simplify_subreg
     * [72]8332: (c++) builtin strlen/template interaction causes ICE
     * [73]8372: (c++) ICE on explicit call of destructor
     * [74]8439: (c, not c++) empty struct causes ICE
     * [75]8442: (c++) ICE with nested template classes
     * [76]8518: ICE when compiling mplayer ("extern inline" issue)
     * [77]8615:  (c++) ICE with out-of-range character constant template
       argument
     * [78]8663: (c++) ICE in cp_expr_size, at cp-lang.c:307
     * [79]8799: (c++) ICE: error reporting routines re-entered
     * [80]9328: (c++) ICE with typeof(X) for overloaded X
     * [81]9465: (preprocessor) cpp -traditional ICE on null bytes

    C++ (compiler and library) bugs

     * [82]47: scoping in nested classes is broken
     * [83]6745: problems with iostream rdbuf() member function
     * [84]8214: conversion from const char* const to char* sometimes accepted
       illegally
     * [85]8493: builtin strlen and overload resolution (same bug as [86]8332)
     * [87]8503: strange behaviour of function types
     * [88]8727: compiler confused by inheritance from an anonymous struct
     * [89]7445: poor performance of std::locale::classic() in multi-threaded
       applications
     * [90]8230: mishandling of overflow in vector<T>::resize
     * [91]8399: sync_with_stdio(false) breaks unformatted input
     * [92]8662: illegal access of private member of unnamed class is accepted
     * [93]8707: "make distclean" fails in libstdc++-v3 directory
     * [94]8708: __USE_MALLOC doesn't work
     * [95]8790: Use of non-thread-safe strtok in src/localename.cc
     * [96]8887: Bug in date formats with --enable-clocale=generic
     * [97]9076: Call Frame Instructions are not handled correctly during
       unwind operation
     * [98]9151: std::setprecision limited to 16 digits when outputting a
       double to a stream
     * [99]9168: codecvt<char, char, mbstate_t> overwrites output buffers
     * [100]9269: libstdc++ headers: explicit specialization of function must
       precede its first use
     * [101]9322:  return  value of basic_streambuf<>::getloc affected by
       locale::global
     * [102]9433: segfault in runtime support for dynamic_cast

    C and optimizer bugs

     * [103]8032: GCC incorrectly initializes static structs that have flexible
       arrays
     * [104]8639: simple arithmetic expression broken
     * [105]8794: optimization improperly eliminates certain expressions
     * [106]8832: traditional "asm volatile" code is illegally optimized
     * [107]8988:  loop  optimizer  bug: with -O2, code is generated that
       segfaults (found on i386, bug present for all platforms)
     * [108]9492: structure copy clobbers subsequent stores to structure

    Objective-C bugs

     * [109]9267: Objective-C parser won't build with newer bison versions
       (e.g. 1.875)

    Ada bugs

     * [110]8344:  Ada build problem due to conflict between gcc/final.o,
       gcc/ada/final.o

    Preprocessor bugs

     * [111]8524: _Pragma within macros is improperly expanded
     * [112]8880: __WCHAR_TYPE__ macro incorrectly set to "long int" with
       -fshort-wchar

    ARM-specific

     * [113]9090: arm ICE with >= -O2; regression from gcc-2.95

    x86-specific (Intel/AMD)

     * [114]8588: ICE in extract_insn, at recog.c:NNNN (shift instruction)
     * [115]8599: loop unroll bug with -march=k6-3
     * [116]9506: ABI breakage in structure return (affects BSD and Cygwin, but
       not GNU/Linux)

    FreeBSD 5.0 specific

     * [117]9484: GCC 3.2.1 Bootstrap failure on FreeBSD 5.0

    RTEMS-specific

     * [118]9292: hppa1.1-rtems configurery problems
     * [119]9293: [m68k-elf/rtems] config/m68k/t-crtstuff bug
     * [120]9295: [mips-rtems] config/mips/rtems.h init/fini issue
     * [121]9296: gthr-rtems regression
     * [122]9316: powerpc-rtems: extending multilibs

    HP-PA specific

     * [123]9493: ICE with -O2 when building a simple function

    Documentation

     * [124]7341: hyperlink to gcov in GCC documentation doesn't work
     * [125]8947: Please add a warning about "-malign-double" in docs
     * [126]7448, [127]8882: typo cleanups
     _________________________________________________________________

GCC 3.2.1

   3.2.1 adds a new warning, -Wabi. This option warns when GNU C++ generates
   code that is known not to be binary-compatible with the vendor-neutral
   ia32/ia64 ABI. Please consult the GCC manual, included in the distribution,
   for details.

   This release also removes an old GCC extension, "naming types", and the
   documentation  now  directs  users  to  use a different GCC extension,
   __typeof__, instead. The feature had evidently been broken for a while.

   Otherwise, 3.2.1 is a bug fix release only; other than bug fixes and the new
   warning there are no new features that were not present in GCC 3.2.

   In  addition,  the  previous fix for [128]PR 7445 (poor performance of
   std::locale::classic()  in  multi-threaded  applications) was reverted
   ("unfixed"), because the "fix" was not thread-safe.

  Bug Fixes

   This section lists the problem reports (PRs) from GCC's bug tracking system
   that are known to be fixed in the 3.2.1 release. This list might not be
   complete (that is, it is possible that some PRs that have been fixed are not
   listed here). As you can see, the number of bug fixes is quite large, so it
   is strongly recommended that users of earlier GCC 3.x releases upgrade to
   GCC 3.2.1.

    Internal Compiler Errors (multi-platform)

     * [129]2521: (c++) ICE in build_ptrmemfunc, in cp/typeck.c
     * [130]5661: (c++) ICE instantiating template on array of unknown size
       (bad code)
     * [131]6419: (c++) ICE in make_decl_rtl for "longest" attribute on 64-bit
       platforms
     * [132]6994: (c++) ICE in find_function_data
     * [133]7150: preprocessor: GCC -dM -E gives an ICE
     * [134]7160: ICE when optimizing branches without a return value
     * [135]7228: (c++) ICE when using member template and template function
     * [136]7266: (c++) ICE with -pedantic on missing typename
     * [137]7353: ICE from use of "Naming Types" extension, see above
     * [138]7411: ICE in instantiate_virtual_regs_1, in function.c
     * [139]7478: (c++) ICE on static_cast inside template
     * [140]7526:  preprocessor  core  dump  when _Pragma implies #pragma
       dependency
     * [141]7721: (c++) ICE on simple (but incorrect) template ([142]7803 is a
       duplicate)
     * [143]7754: (c++) ICE on union with template parameter
     * [144]7788: (c++) redeclaring a definition as an incomplete class causes
       ICE
     * [145]8031: (c++) ICE in comptypes, in cp/typeck.c
     * [146]8055: preprocessor dies with SIG11 when building FreeBSD kernel
     * [147]8067: (c++) ICE due to mishandling of __FUNCTION__ and related
       variables
     * [148]8134: (c++) ICE in force_store_init_value on legal code
     * [149]8149: (c++) ICE on incomplete type
     * [150]8160:  (c++)  ICE in build_modify_expr, in cp/typeck.c: array
       initialization

    C++ (compiler and library) bugs

     * [151]5607: No pointer adjustment in covariant return types
     * [152]6579:  Infinite  loop  with  statement  expressions in member
       initialization
     * [153]6803: Default copy constructor bug in GCC 3.1
     * [154]7176: g++ confused by friend and static member with same name
     * [155]7188:  Segfault with template class and recursive (incorrect)
       initializer list
     * [156]7306:  Regression: GCC 3.x fails to compile code with virtual
       inheritance if a method has a variable number of arguments
     * [157]7461: ctype<char>::classic_table() returns offset array on Cygwin
     * [158]7524: f(const float arg[3]) fails
     * [159]7584: Erroneous ambiguous base error on using declaration
     * [160]7676: Member template overloading problem
     * [161]7679: infinite loop when a right parenthesis is missing
     * [162]7811: default locale not taken from environment
     * [163]7961: compare( char *) implemented incorrectly in basic_string<>
     * [164]8071:  basic_ostream::operator<<(streambuf*) loops forever if
       streambuf::underflow() leaves gptr() NULL (dups: [165]8127, [166]6745)
     * [167]8096:   deque::at()   throws   std::range_error   instead  of
       std::out_of_range
     * [168]8127: cout << cin.rdbuf() infinite loop
     * [169]8218: Excessively large memory consumed for classes with large
       array members
     * [170]8287: GCC 3.2: Destructor called for non-constructed local object
     * [171]8347: empty vector range used in string construction causes core
       dump
     * [172]8348: fail() flag is set in istringstream when eof() flag is set
     * [173]8391: regression: infinite loop in cp/decl2.c(finish_file)

    C and optimizer bugs

     * [174]6627:  -fno-align-functions  doesn't seem to disable function
       alignment
     * [175]6631: life_analysis misoptimizes code to initialize fields of a
       structure
     * [176]7102: unsigned char division results in floating exception
     * [177]7120: Run once loop should *always* be unrolled (pessimization)
     * [178]7209: Bug involving array referencing and ?: operator
     * [179]7515: invalid inlining of global function with -O3
     * [180]7814: incorrect scheduling for glibc-2.2.92 strcpy test
     * [181]8467: bug in sibling call optimization

    Preprocessor bugs

     * [182]4890: incorrect line markers from the traditional preprocessor
     * [183]7357: -M option omits system headers files (making it the same as
       -MM)
     * [184]7358: Changes to Sun's make Dependencies
     * [185]7602: C++ header files found in CPLUS_INCLUDE_PATH treated as C
       headers
     * [186]7862: Interrupting GCC -MD removes .d file but not .o
     * [187]8190: Failed compilation deletes -MD dependency file
     * [188]8524: _Pragma within macro is improperly expanded

    x86 specific (Intel/AMD)

     * [189]5351: (i686-only) function pass-by-value structure copy corrupts
       stack ([190]7591 is a duplicate)
     * [191]6845,    [192]7034,    [193]7124,   [194]7174:   ICE's   with
       -march=pentium3/pentium2/athlon (these are all the same underlying bug,
       in MMX register use)
     * [195]7134, [196]7375, [197]7390: ICE with -march=athlon (maybe same as
       above?)
     * [198]6890: xmmintrin.h, _MM_TRANSPOSE4_PS is broken
     * [199]6981: wrong code in 64-bit manipulation on x86
     * [200]7242: GCC -mcpu=pentium[23] doesn't define __tune_pentiumpro__
       macro
     * [201]7396:  ix86: cmpgt_ss, cmpge_ss, cmpngt_ss, and cmpnge_ss SSE
       intrinsics are broken
     * [202]7630:  GCC  3.2  breaks  on  Mozilla  1.0's  JS  sources with
       -march=pentium4
     * [203]7693: Typo in i386 mmintrin.h header
     * [204]7723: ICE - Pentium3 sse - GCC 3.2
     * [205]7951: ICE on -march=pentium4 -O2 -mfpmath=sse
     * [206]8146: (i686 only) gcc 3.2 miscompiles gcc 2.95.3

    PowerPC specific

     * [207]5967: GCC bug when profiling nested functions on powerpc
     * [208]6984: wrong code generated with -O2, -O3, -Os for do-while loop on
       PowerPC
     * [209]7114: PowerPC: ICE building strcoll.op from glibc-2.2.5
     * [210]7130:  miscompiled  code  for  GCC-3.1  in powerpc linux with
       -funroll-all-loops
     * [211]7133: PowerPC ICE: unrecognizable insn
     * [212]7380: ICE in extract_insn, at recog.c:2148
     * [213]8252: ICE on Altivec code with optimization turned on
     * [214]8451: Altivec ICE in GCC 3.2

    HP/PA specific

     * [215]7250: __ashrdi3 returns wrong value on 32 bit hppa

    SPARC specific

     * [216]6668: when using --disable-multilib, libgcc_s.so is installed in
       the wrong place on sparc-solaris
     * [217]7151: ICE when compiling for UltraSPARC
     * [218]7335: SPARC: ICE in verify_wide_reg (flow.c:557) with long double
       and -O1
     * [219]7842: [REGRESSION] SPARC code gen bug

    ARM specific

     * [220]7856: [arm] invalid offset in constant pool reference
     * [221]7967: optimization produces wrong code (ARM)

    Alpha specific

     * [222]7374: __builtin_fabsl broken on alpha

    IBM s390 specific

     * [223]7370: ICE in fixup_var_refs_1 on s390x
     * [224]7409: loop optimization bug on s390x-linux-gnu
     * [225]8232: s390x: ICE when using bcmp with int length argument

    SCO specific

     * [226]7623: SCO OpenServer build fails with machmode.def: undefined
       symbol: BITS_PER_UNIT

    m68k/Coldfire specific

     * [227]8314: crtbegin, crtend need to be multilib'ed for this platform

    Documentation

     * [228]761: Document some undocumented options
     * [229]5610:  Fix  documentation  about  invoking  SSE  instructions
       (-mfpmath=sse)
     * [230]7484: List -Wmissing-declarations as C-only option
     * [231]7531: -mcmodel not documented for x86-64
     * [232]8120: Update documentation of bad use of ##
     _________________________________________________________________

GCC 3.2

   3.2 is a small bug fix release, but there is a change to the application
   binary interface (ABI), hence the change to the second part of the version
   number.

   The main purpose of the 3.2 release is to correct a couple of problems in
   the  C++ ABI, with the intention of providing a stable interface going
   forward.  Accordingly, 3.2 is only a small change to 3.1.1.

  Bug Fixes

    C++

     * [233]7320: g++ 3.2 relocation problem
     * [234]7470: vtable: virtual function pointers not in declaration order

    libstdc++

     * [235]6410: Trouble with non-ASCII monetary symbols and wchar_t
     * [236]6503, [237]6642, [238]7186: Problems with comparing or subtracting
       various types of const and non-const iterators
     * [239]7216: ambiguity with basic_iostream::traits_type
     * [240]7220: problem with basic_istream::ignore(0,delimiter)
     * [241]7222: locale::operator==() doesn't work on std::locale("")
     * [242]7286: placement operator delete issue
     * [243]7442: cxxabi.h does not match the C++ ABI
     * [244]7445: poor performance of std::locale::classic() in multi-threaded
       applications

    x86-64 specific

     * [245]7291: off-by-one in generated inline bzero code for x86-64

   Please send FSF & GNU inquiries & questions to [246]gnu@gnu.org. There are
   also [247]other ways to contact the FSF.

   These pages are maintained by [248]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [249]GCC manuals. If that fails, the [250]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [251]gcc@gnu.org or [252]gcc@gcc.gnu.org. All of
    our lists have [253]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [254]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/gcc-3.2/changes.html#3.2.3
   2. http://gcc.gnu.org/gcc-3.1/changes.html
   3. http://gcc.gnu.org/gcc-3.2/c++-abi.html
   4. http://gcc.gnu.org/PR3782
   5. http://gcc.gnu.org/PR6440
   6. http://gcc.gnu.org/PR7050
   7. http://gcc.gnu.org/PR7741
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  55. http://gcc.gnu.org/PR10073
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  57. http://gcc.gnu.org/PR9671
  58. http://gcc.gnu.org/PR8694
  59. http://gcc.gnu.org/PR9953
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  64. http://gcc.gnu.org/PR5919
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 252. mailto:gcc@gcc.gnu.org
 253. http://gcc.gnu.org/lists.html
 254. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.1/index.html

                                  GCC 3.1

   July 27, 2002

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.1.1.

   The links below still apply to GCC 3.1.1.

   May 15, 2002

   The  [2]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.1.

   GCC used to stand for the GNU C Compiler, but since the compiler supports
   several other languages aside from C, it now stands for the GNU Compiler
   Collection.

   A  list  of [3]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed [4]new features, improvements, bug fixes, and other changes as
   well as test results to GCC. This [5]amazing group of volunteers is what
   makes GCC successful.

   For additional information about GCC please refer to the [6]GCC project web
   site or contact the [7]GCC development mailing list.

   To obtain GCC please use [8]our mirror sites, one of the [9]GNU mirror
   sites, or our CVS server.
     _________________________________________________________________

   Please send FSF & GNU inquiries & questions to [10]gnu@gnu.org. There are
   also [11]other ways to contact the FSF.

   These pages are maintained by [12]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [13]GCC manuals. If that fails, the [14]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [15]gcc@gnu.org or [16]gcc@gcc.gnu.org. All of
    our lists have [17]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [18]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://www.gnu.org/
   3. http://gcc.gnu.org/gcc-3.1/buildstat.html
   4. http://gcc.gnu.org/gcc-3.1/changes.html
   5. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   6. http://gcc.gnu.org/index.html
   7. mailto:gcc@gcc.gnu.org
   8. http://gcc.gnu.org/mirrors.html
   9. http://www.gnu.org/order/ftp.html
  10. mailto:gnu@gnu.org
  11. http://www.gnu.org/home.html#ContactInfo
  12. http://gcc.gnu.org/about.html
  13. http://gcc.gnu.org/onlinedocs/
  14. mailto:gcc-help@gcc.gnu.org
  15. mailto:gcc@gnu.org
  16. mailto:gcc@gcc.gnu.org
  17. http://gcc.gnu.org/lists.html
  18. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.1/changes.html

                           GCC 3.1 Release Series
                      Changes, New Features, and Fixes

Additional changes in GCC 3.1.1

     * A bug related to how structures and unions are returned has been fixed
       for powerpc-*-netbsd*.
     * An important bug in the implementation of -fprefetch-loop-arrays has
       been fixed. Previously the optimization prefetched random blocks of
       memory for most targets except for i386.
     * The Java compiler now compiles Java programs much faster and also works
       with parallel make.
     * Nested functions have been fixed for mips*-*-netbsd*.
     * Some  missing  floating point support routines have beed added for
       mips*-*-netbsd*.
     * This [1]message gives additional information about the bugs fixed in
       this release.

Caveats

     * The -traditional C compiler option has been deprecated and will be
       removed in GCC 3.3. (It remains possible to preprocess non-C code with
       the traditional preprocessor.)
     * The default debugging format for most ELF platforms (including GNU/Linux
       and FreeBSD; notable exception is Solaris) has changed from stabs to
       DWARF2. This requires GDB 5.1.1 or later.

General Optimizer Improvements

     * Jan Hubicka, SuSE Labs, together with Richard Henderson, Red Hat, and
       Andreas Jaeger, SuSE Labs, has contributed [2]infrastructure for profile
       driven optimizations.
       Options -fprofile-arcs and -fbranch-probabilities can now be used to
       improve speed of the generated code by profiling the actual program
       behaviour on typical runs. In the absence of profile info the compiler
       attempts to guess the profile statically.
     * [3]SPEC2000 and SPEC95 benchmark suites are now used daily to monitor
       performance of the generated code.
       According to the SPECInt2000 results on an AMD Athlon CPU, the code
       generated by GCC 3.1 is 6% faster on the average (8.2% faster with
       profile feedback) compared to GCC 3.0. The code produced by GCC 3.0 is
       about 2.1% faster compared to 2.95.3. Tests were done using the -O2
       -march=athlon command-line options.
     * Alexandre  Oliva,  of  Red  Hat, has generalized the tree inlining
       infrastructure developed by CodeSourcery, LLC for the C++ front end, so
       that it is now used in the C front end too. Inlining functions as trees
       exposes them earlier to the compiler, giving it more opportunities for
       optimization.
     * Support for data prefetching instructions has been added to the GCC back
       end and several targets. A new __builtin_prefetch intrinsic is available
       to explicitly insert prefetch instructions and experimental support for
       loop  array  prefetching has been added (see -fprefetch-loop-array
       documentation).
     * Support for emitting debugging information for macros has been added for
       DWARF2. It is activated using -g3.

New Languages and Language specific improvements

  C/C++

     * A few more [4]ISO C99 features.
     * The preprocessor is 10-50% faster than the preprocessor in GCC 3.0.
     * The preprocessor's symbol table has been merged with the symbol table of
       the C, C++ and Objective-C front ends.
     * The preprocessor consumes less memory than the preprocessor in GCC 3.0,
       often significantly so. On normal input files, it typically consumes
       less memory than pre-3.0 cccp-based GCC, too.

  C++

     * -fhonor-std and -fno-honor-std have been removed. -fno-honor-std was a
       workaround  to  allow  std compliant code to work with the non-std
       compliant libstdc++-v2. libstdc++-v3 is std compliant.
     * The C++ ABI has been fixed so that void (A::*)() const is mangled as
       "M1AKFvvE", rather than "MK1AFvvE" as before. This change only affects
       pointer to cv-qualified member function types.
     * The C++ ABI has been changed to correctly handle this code:
    struct A {
      void operator delete[] (void *, size_t);
    };

    struct B : public A {
    };

    new B[10];

       The amount of storage allocated for the array will be greater than it
       was in 3.0, in order to store the number of elements in the array, so
       that the correct size can be passed to operator delete[] when the array
       is  deleted. Previously, the value passed to operator delete[] was
       unpredictable.
       This change will only affect code that declares a two-argument operator
       delete[] with a second parameter of type size_t in a base class, and
       does not override that definition in a derived class.
     * The C++ ABI has been changed so that:
    struct A {
      void operator delete[] (void *, size_t);
      void operator delete[] (void *);
    };

       does not cause unnecessary storage to be allocated when an array of A
       objects is allocated.
       This change will only affect code that declares both of these forms of
       operator  delete[],  and declared the two-argument form before the
       one-argument form.
     * The C++ ABI has been changed so that when a parameter is passed by
       value, any cleanup for that parameter is performed in the caller, as
       specified  by the ia64 C++ ABI, rather than the called function as
       before. As a result, classes with a non-trivial destructor but a trivial
       copy constructor will be passed and returned by invisible reference,
       rather than by bitwise copy as before.
     * G++ now supports the "named return value optimization": for code like
    A f () {
      A a;
      ...
      return a;
    }

       G++ will allocate a in the return value slot, so that the return becomes
       a no-op. For this to work, all return statements in the function must
       return the same variable.
     * Improvements to the C++ library are listed in [5]the libstdc++-v3 FAQ.

  Objective-C

     * Annoying linker warnings (due to incorrect code being generated) have
       been fixed.
     * If a class method cannot be found, the compiler no longer issues a
       warning if a corresponding instance method exists in the root class.
     * Forward @protocol declarations have been fixed.
     * Loading of categories has been fixed in certain situations (GNU run time
       only).
     * The class lookup in the run-time library has been rewritten so that
       class method dispatch is more than twice as fast as it used to be (GNU
       run time only).

  Java

     * libgcj   now  includes  RMI,  java.lang.ref.*,  javax.naming,  and
       javax.transaction.
     * Property  files  and  other  system resources can be compiled into
       executables which use libgcj using the new gcj --resource feature.
     * libgcj has been ported to more platforms. In particular there is now a
       mostly-functional mingw32 (Windows) target port.
     * JNI and CNI invocation interfaces were implemented, so gcj-compiled Java
       code can now be called from a C/C++ application.
     * gcj  can  now use builtin functions for certain known methods, for
       instance Math.cos.
     * gcj can now automatically remove redundant array-store checks in some
       common cases.
     * The --no-store-checks optimization option was added. This can be used to
       omit  runtime  store  checks  for code which is known not to throw
       ArrayStoreException
     * The following third party interface standards were added to libgcj:
       org.w3c.dom and org.xml.sax.
     * java.security has been merged with GNU Classpath. The new package is now
       JDK 1.2 compliant, and much more complete.
     * A bytecode verifier was added to the libgcj interpreter.
     * java.lang.Character  was  rewritten to comply with the Unicode 3.0
       standard, and improve performance.
     * Partial support for many more locales was added to libgcj.
     * Socket timeouts have been implemented.
     * libgcj has been merged into a single shared library. There are no longer
       separate shared libraries for the garbage collector and zlib.
     * Several performance improvements were made to gcj and libgcj:
          + Hash synchronization (thin locks)
          + A special allocation path for finalizer-free objects
          + Thread-local allocation
          + Parallel GC, and other GC tweaks

  Fortran

   Fortran improvements are listed in [6]the Fortran documentation.

  Ada

   [7]Ada Core Technologies, Inc, has contributed its GNAT Ada 95 front end and
   associated tools. The GNAT compiler fully implements the Ada language as
   defined by the ISO/IEC 8652 standard.

   Please note that the integration of the Ada front end is still work in
   progress.

New Targets and Target Specific Improvements

     * Hans-Peter  Nilsson  has  contributed  a  port to [8]MMIX, the CPU
       architecture  used in new editions of Donald E. Knuth's The Art of
       Computer Programming.
     * [9]Axis  Communications  has  contributed its port to the CRIS CPU
       architecture, used in the ETRAX system-on-a-chip series. See [10]Axis'
       developer site for technical information.
     * Alexandre Oliva, of Red Hat, has contributed a port to the [11]SuperH
       SH5 64-bit RISC microprocessor architecture, extending the existing SH
       port.
     * UltraSPARC is fully supported in 64-bit mode. The option -m64 enables
       it.
     * For compatibility with the Sun compiler #pragma redefine_extname has
       been implemented on Solaris.
     * The x86 back end has had some noticeable work done to it.
          + SuSE Labs developers Jan Hubicka, Bo Thorsen and Andreas Jaeger
            have contributed a port to the AMD x86-64 architecture. For more
            information on x86-64 see [12]http://www.x86-64.org.
          + The compiler now supports MMX, 3DNow!, SSE, and SSE2 instructions.
            Options  -mmmx,  -m3dnow,  -msse,  and -msse2 will enable the
            respective instruction sets. Intel C++ compatible MMX/3DNow!/SSE
            intrinsics are implemented. SSE2 intrinsics will be added in next
            major release.
          + Following those improvements, targets for Pentium MMX, K6-2, K6-3,
            Pentium III, Pentium 4, and Athlon 4 Mobile/XP/MP were added. Refer
            to the documentation on -march= and -mcpu= options for details.
          + For those targets that support it, -mfpmath=sse will cause the
            compiler to generate SSE/SSE2 instructions for floating point math
            instead of x87 instructions. Usually, this will lead to quicker
            code — especially on the Pentium 4. Note that only scalar floating
            point instructions are used and GCC does not exploit SIMD features
            yet.
          + Prefetch support has been added to the Pentium III, Pentium 4,
            K6-2, K6-3, and Athlon series.
          + Code generated for floating point to integer conversions has been
            improved leading to better performance of many 3D applications.
     * The PowerPC back end has added 64-bit PowerPC GNU/Linux support.
     * C++ support for AIX has been improved.
     * Aldy Hernandez, of Red Hat, Inc, has contributed extensions to the
       PowerPC  port supporting the AltiVec programming model (SIMD). The
       support, though presently useful, is experimental and is expected to
       stabilize for 3.2. The support is written to conform to Motorola's
       AltiVec specs. See -maltivec.

Obsolete Systems

   Support for a number of older systems has been declared obsolete in GCC 3.1.
   Unless there is activity to revive them, the next release of GCC will have
   their sources permanently removed.

   All  configurations of the following processor architectures have been
   declared obsolete:
     * MIL-STD-1750A, 1750a-*-*
     * AMD A29k, a29k-*-*
     * Convex, c*-convex-*
     * Clipper, clipper-*-*
     * Elxsi, elxsi-*-*
     * Intel i860, i860-*-*
     * Sun picoJava, pj-*-* and pjl-*-*
     * Western Electric 32000, we32k-*-*

   Most configurations of the following processor architectures have been
   declared obsolete, but we are preserving a few systems which may have active
   developers. It is unlikely that the remaining systems will survive much
   longer unless we see definite signs of port activity.
     * Motorola 88000 except
          + Generic a.out, m88k-*-aout*
          + Generic SVR4, m88k-*-sysv4
          + OpenBSD, m88k-*-openbsd*
     * NS32k except
          + NetBSD, ns32k-*-netbsd*
          + OpenBSD, ns32k-*-openbsd*.
     * ROMP except
          + OpenBSD, romp-*-openbsd*.

   Finally, only some configurations of these processor architectures are being
   obsoleted.
     * Alpha:
          + OSF/1,  alpha*-*-osf[123]*. (Digital Unix and Tru64 Unix, aka
            alpha*-*-osf[45], are still supported.)
     * ARM:
          + RISCiX, arm-*-riscix*.
     * i386:
          + 386BSD, i?86-*-bsd*
          + Chorus, i?86-*-chorusos*
          + DG/UX, i?86-*-dgux*
          + FreeBSD 1.x, i?86-*-freebsd1.*
          + IBM AIX, i?86-*-aix*
          + ISC UNIX, i?86-*-isc*
          + Linux with pre-BFD linker, i?86-*-linux*oldld*
          + NEXTstep, i?86-next-*
          + OSF UNIX, i?86-*-osf1* and i?86-*-osfrose*
          + RTEMS/coff, i?86-*-rtemscoff*
          + RTEMS/go32, i?86-go32-rtems*
          + Sequent/BSD, i?86-sequent-bsd*
          + Sequent/ptx   before  version  3,  i?86-sequent-ptx[12]*  and
            i?86-sequent-sysv3*
          + SunOS, i?86-*-sunos*
     * Motorola 68000:
          + Altos, m68[k0]*-altos-*
          + Apollo, m68[k0]*-apollo-*
          + Apple A/UX, m68[k0]*-apple-*
          + Bull, m68[k0]*-bull-*
          + Convergent, m68[k0]*-convergent-*
          + Generic SVR3, m68[k0]*-*-sysv3*
          + ISI, m68[k0]*-isi-*
          + LynxOS, m68[k0]*-*-lynxos*
          + NEXT, m68[k0]*-next-*
          + RTEMS/coff, m68[k0]*-*-rtemscoff*
          + Sony, m68[k0]*-sony-*
     * MIPS:
          + DEC Ultrix, mips-*-ultrix* and mips-dec-*
          + Generic BSD, mips-*-bsd*
          + Generic System V, mips-*-sysv*
          + IRIX before version 5, mips-sgi-irix[1234]*
          + RiscOS, mips-*-riscos*
          + Sony, mips-sony-*
          + Tandem, mips-tandem-*
     * SPARC:
          + RTEMS/a.out, sparc-*-rtemsaout*.

Documentation improvements

     * The old manual ("Using and Porting the GNU Compiler Collection") has
       been replaced by a users manual ("Using the GNU Compiler Collection")
       and a separate internals reference manual ("GNU Compiler Collection
       Internals").
     * More complete and much improved documentation about GCC's internal
       representation used by the C and C++ front ends.
     * Many cleanups and improvements in general.

   Please send FSF & GNU inquiries & questions to [13]gnu@gnu.org. There are
   also [14]other ways to contact the FSF.

   These pages are maintained by [15]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [16]GCC manuals. If that fails, the [17]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [18]gcc@gnu.org or [19]gcc@gcc.gnu.org. All of
    our lists have [20]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2007-02-18 [21]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/ml/gcc/2002-07/msg01208.html
   2. http://gcc.gnu.org/news/profiledriven.html
   3. http://gcc.gnu.org/benchmarks/
   4. http://gcc.gnu.org/gcc-3.1/c99status.html
   5. http://gcc.gnu.org/onlinedocs/libstdc++/faq/index.html#4_1
   6. http://gcc.gnu.org/onlinedocs/gcc-3.1.1/g77/News.html
   7. http://www.adacore.com/home/
   8. http://www-cs-faculty.stanford.edu/~knuth/mmix.html
   9. http://www.axis.com/
  10. http://developer.axis.com/
  11. http://www.superh.com/
  12. http://www.x86-64.org/
  13. mailto:gnu@gnu.org
  14. http://www.gnu.org/home.html#ContactInfo
  15. http://gcc.gnu.org/about.html
  16. http://gcc.gnu.org/onlinedocs/
  17. mailto:gcc-help@gcc.gnu.org
  18. mailto:gcc@gnu.org
  19. mailto:gcc@gcc.gnu.org
  20. http://gcc.gnu.org/lists.html
  21. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.0/gcc-3.0.html

                                 GCC 3.0.4

   February 20, 2002

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.0.4, which is a bug-fix release for the GCC 3.0 series.

   GCC used to stand for the GNU C Compiler, but since the compiler supports
   several other languages aside from C, it now stands for the GNU Compiler
   Collection.

   GCC 3.0.x has several new optimizations, new targets, new languages and many
   other new features, relative to GCC 2.95.x. See the [2]new features page for
   a more complete list.

   A  list  of [3]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed  new  features,  test results, bug fixes, etc to GCC. This
   [4]amazing group of volunteers is what makes GCC successful.

   And finally, we can't in good conscience fail to mention some [5]caveats to
   using GCC 3.0.x.

   For additional information about GCC please refer to the [6]GCC project web
   site or contact the [7]GCC development mailing list.

   To obtain GCC please use [8]our mirror sites, one of the [9]GNU mirror
   sites, or our CVS server.
     _________________________________________________________________

Previous 3.0.x Releases

   December 20, 2001: GCC 3.0.3 has been released.
   October 25, 2001: GCC 3.0.2 has been released.
   August 20, 2001: GCC 3.0.1 has been released.
   June 18, 2001: GCC 3.0 has been released.

   Please send FSF & GNU inquiries & questions to [10]gnu@gnu.org. There are
   also [11]other ways to contact the FSF.

   These pages are maintained by [12]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [13]GCC manuals. If that fails, the [14]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [15]gcc@gnu.org or [16]gcc@gcc.gnu.org. All of
    our lists have [17]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2007-02-01 [18]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://gcc.gnu.org/gcc-3.0/features.html
   3. http://gcc.gnu.org/gcc-3.0/buildstat.html
   4. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   5. http://gcc.gnu.org/gcc-3.0/caveats.html
   6. http://gcc.gnu.org/index.html
   7. mailto:gcc@gcc.gnu.org
   8. http://gcc.gnu.org/mirrors.html
   9. http://www.gnu.org/order/ftp.html
  10. mailto:gnu@gnu.org
  11. http://www.gnu.org/home.html#ContactInfo
  12. http://gcc.gnu.org/about.html
  13. http://gcc.gnu.org/onlinedocs/
  14. mailto:gcc-help@gcc.gnu.org
  15. mailto:gcc@gnu.org
  16. mailto:gcc@gcc.gnu.org
  17. http://gcc.gnu.org/lists.html
  18. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.0/features.html

                            GCC 3.0 New Features

Additional changes in GCC 3.0.4

     * GCC 3.0 now supports newer versions of the [1]NetBSD operating system,
       which use the ELF object file format, on x86 processors.
     * Correct debugging information is generated from functions that have
       lines from multiple files (e.g. yacc output).
     * A fix for whitespace handling in the -traditional preprocessor, which
       can affect Fortran.
     * Fixes to the exception handling runtime.
     * More fixes for bad code generation in C++.
     * A fix for shared library generation under AIX 4.3.
     * Documentation updates.
     * Port of GCC to Tensilica's Xtensa processor contributed.
     * A fix for compiling the PPC Linux kernel (FAT fs wouldn't link).

Additional changes in GCC 3.0.3

     * A fix to correct an accidental change to the PowerPC ABI.
     * Fixes for bad code generation on a variety of architectures.
     * Improvements to the debugging information generated for C++ classes.
     * Fixes for bad code generation in C++.
     * A fix to avoid crashes in the C++ demangler.
     * A fix to the C++ standard library to avoid buffer overflows.
     * Miscellaneous improvements for a variety of architectures.

Additional changes in GCC 3.0.2

     * Fixes for bad code generation during loop unrolling.
     * Fixes for bad code generation by the sibling call optimization.
     * Minor improvements to x86 code generation.
     * Implementation of function descriptors in C++ vtables for IA64.
     * Numerous minor bug-fixes.

Additional changes in GCC 3.0.1

     * C++ fixes for incorrect code-generation.
     * Improved cross-compiling support for the C++ standard library.
     * Fixes for some embedded targets that worked in GCC 2.95.3, but not in
       GCC 3.0.
     * Fixes for various exception-handling bugs.
     * A port to the S/390 architecture.

General Optimizer Improvements

     * [2]Basic block reordering pass.
     * New  if-conversion  pass with support for conditional (predicated)
       execution.
     * New tail call and sibling call elimination optimizations.
     * New register renaming pass.
     * New (experimental) [3]static single assignment (SSA) representation
       support.
     * New dead-code elimination pass implemented using the SSA representation.
     * [4]Global null pointer test elimination.
     * [5]Global code hoisting/unification.
     * More  builtins and optimizations for stdio.h, string.h and old BSD
       functions, as well as for ISO C99 functions.
     * New builtin __builtin_expect for giving hints to the branch predictor.

New Languages and Language specific improvements

     * The GNU Compiler for the Java(TM) language (GCJ) is now integrated and
       supported, including the run-time library containing most common non-GUI
       Java classes, a bytecode interpreter, and the Boehm conservative garbage
       collector. Many bugs have been fixed. GCJ can compile Java source or
       Java bytecodes to either native code or Java class files, and supports
       native methods written in either the standard JNI or the more efficient
       and convenient CNI.
     * Here is a [6]partial list of C++ improvements, both new features and
       those no longer supported.
     * New C++ ABI. On the IA-64 platform GCC is capable of inter-operating
       with other IA-64 compilers.
     * The new ABI also significantly reduces the size of symbol and debug
       information.
     * New [7]C++ support library and many C++ bug fixes, vastly improving our
       conformance to the ISO C++ standard.
     * New [8]inliner for C++.
     * Rewritten C preprocessor, integrated into the C, C++ and Objective C
       compilers, with very many improvements including ISO C99 support and
       [9]improvements to dependency generation.
     * Support for more [10]ISO C99 features.
     * Many improvements to support for checking calls to format functions such
       as printf and scanf, including support for ISO C99 format features,
       extensions from the Single Unix Specification and GNU libc 2.2, checking
       of strfmon formats and features to assist in auditing for format string
       security bugs.
     * New warnings for C code that may have undefined semantics because of
       violations of sequence point rules in the C standard (such as a = a++;,
       a[n] = b[n++]; and a[i++] = i;), included in -Wall.
     * Additional warning option -Wfloat-equal.
     * Improvements to -Wtraditional.
     * Fortran improvements are listed in [11]the Fortran documentation.

New Targets and Target Specific Improvements

     * New x86 back-end, generating much improved code.
     * Support for a generic i386-elf target contributed.
     * New  option  to  emit  x86  assembly code using Intel style syntax
       (-mintel-syntax).
     * HPUX 11 support contributed.
     * Improved PowerPC code generation, including scheduled prologue and
       epilogue.
     * Port of GCC to Intel's IA-64 processor contributed.
     * Port of GCC to Motorola's MCore 210 and 340 contributed.
     * New unified back-end for Arm, Thumb and StrongArm contributed.
     * Port of GCC to Intel's XScale processor contributed.
     * Port of GCC to Atmel's AVR microcontrollers contributed.
     * Port of GCC to Mitsubishi's D30V processor contributed.
     * Port of GCC to Matsushita's AM33 processor (a member of the MN10300
       processor family) contributed.
     * Port of GCC to Fujitsu's FR30 processor contributed.
     * Port of GCC to Motorola's 68HC11 and 68HC12 processors contributed.
     * Port of GCC to Sun's picoJava processor core contributed.

Documentation improvements

     * Substantially rewritten and improved C preprocessor manual.
     * Many improvements to other documentation.
     * Manpages for gcc, cpp and gcov are now generated automatically from the
       master Texinfo manual, eliminating the problem of manpages being out of
       date. (The generated manpages are only extracts from the full manual,
       which is provided in Texinfo form, from which info, HTML, other formats
       and a printed manual can be generated.)
     * Generated info files are included in the release tarballs alongside
       their Texinfo sources, avoiding problems on some platforms with building
       makeinfo as part of the GCC distribution.

Other significant improvements

     * Garbage collection used internally by the compiler for most memory
       allocation instead of obstacks.
     * Lengauer and Tarjan algorithm used for computing dominators in the CFG.
       This algorithm can be significantly faster and more space efficient than
       our older algorithm.
     * gccbug script provided to assist in submitting bug reports to our bug
       tracking system. (Bug reports previously submitted directly to our
       mailing lists, for which you received no bug tracking number, should be
       submitted again using gccbug if you can reproduce the problem with GCC
       3.0.)
     * The internal libgcc library is [12]built as a shared library on systems
       that support it.
     * Extensive testsuite included with GCC, with many new tests. In addition
       to tests for GCC bugs that have been fixed, many tests have been added
       for language features, compiler warnings and builtin functions.
     * Additional language-independent warning options -Wpacked, -Wpadded,
       -Wunreachable-code and -Wdisabled-optimization.
     * Target-independent  options  -falign-functions,  -falign-loops and
       -falign-jumps.

   Plus a great many bug fixes and almost all the [13]features found in GCC
   2.95.

   Please send FSF & GNU inquiries & questions to [14]gnu@gnu.org. There are
   also [15]other ways to contact the FSF.

   These pages are maintained by [16]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [17]GCC manuals. If that fails, the [18]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [19]gcc@gnu.org or [20]gcc@gcc.gnu.org. All of
    our lists have [21]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2007-02-24 [22]Valid XHTML 1.0 

References

   1. http://www.netbsd.org/
   2. http://gcc.gnu.org/news/reorder.html
   3. http://gcc.gnu.org/news/ssa.html
   4. http://gcc.gnu.org/news/null.html
   5. http://gcc.gnu.org/news/unify.html
   6. http://gcc.gnu.org/gcc-3.0/c++features.html
   7. http://gcc.gnu.org/libstdc++/
   8. http://gcc.gnu.org/news/inlining.html
   9. http://gcc.gnu.org/news/dependencies.html
  10. http://gcc.gnu.org/gcc-3.0/c99status.html
  11. http://gcc.gnu.org/onlinedocs/gcc-3.4.6/g77/News.html
  12. http://gcc.gnu.org/gcc-3.0/libgcc.html
  13. http://gcc.gnu.org/gcc-2.95/features.html
  14. mailto:gnu@gnu.org
  15. http://www.gnu.org/home.html#ContactInfo
  16. http://gcc.gnu.org/about.html
  17. http://gcc.gnu.org/onlinedocs/
  18. mailto:gcc-help@gcc.gnu.org
  19. mailto:gcc@gnu.org
  20. mailto:gcc@gcc.gnu.org
  21. http://gcc.gnu.org/lists.html
  22. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.0/caveats.html

                              GCC 3.0 Caveats

     * -fstrict-aliasing is now part of -O2 and higher optimization levels.
       This  allows  the  compiler to assume the strictest aliasing rules
       applicable to the language being compiled. For C and C++, this activates
       optimizations based on the type of expressions. This optimization may
       thus break old, non-compliant code.
     * Enumerations are now properly promoted to int in function parameters and
       function returns. Normally this change is not visible, but when using
       -fshort-enums this is an ABI change.
     * The undocumented extension that allowed C programs to have a label at
       the end of a compound statement has been deprecated and may be removed
       in a future version. Programs that now generate a warning about this may
       be fixed by adding a null statement (a single semicolon) after the
       label.
     * The poorly documented extension that allowed string constants in C, C++
       and Objective C to contain unescaped newlines has been deprecated and
       may be removed in a future version. Programs using this extension may be
       fixed  in several ways: the bare newline may be replaced by \n, or
       preceded by \n\, or string concatenation may be used with the bare
       newline preceded by \n" and " placed at the start of the next line.
     * The Chill compiler is not included in GCC 3.0, because of the lack of a
       volunteer to convert it to use garbage collection.
     * Certain non-standard iostream methods from earlier versions of libstdc++
       are not included in libstdc++ v3, i.e. filebuf::attach, ostream::form,
       and istream::gets. Here are workaround hints for: [1]ostream::form,
       [2]filebuf::attach.
     * The new C++ ABI is not yet fully supported by current (as of 2001-07-01)
       releases and development versions of GDB, or any earlier versions. There
       is a problem setting breakpoints by line number, and other related
       issues that have been fixed in GCC 3.0 but not yet handled in GDB:
       [3]http://gcc.gnu.org/ml/gcc-bugs/2001-06/msg00421.html

   Please send FSF & GNU inquiries & questions to [4]gnu@gnu.org. There are
   also [5]other ways to contact the FSF.

   These pages are maintained by [6]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [7]GCC manuals. If that fails, the [8]gcc-help@gcc.gnu.org mailing list
    might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [9]gcc@gnu.org or [10]gcc@gcc.gnu.org. All of our
    lists have [11]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [12]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/onlinedocs/libstdc++/21_strings/howto.html
   2. http://gcc.gnu.org/onlinedocs/libstdc++/ext/howto.html
   3. http://gcc.gnu.org/ml/gcc-bugs/2001-06/msg00421.html
   4. mailto:gnu@gnu.org
   5. http://www.gnu.org/home.html#ContactInfo
   6. http://gcc.gnu.org/about.html
   7. http://gcc.gnu.org/onlinedocs/
   8. mailto:gcc-help@gcc.gnu.org
   9. mailto:gcc@gnu.org
  10. mailto:gcc@gcc.gnu.org
  11. http://gcc.gnu.org/lists.html
  12. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-2.95/index.html

                                  GCC 2.95

   March  16, 2001: The GNU project and the GCC developers are pleased to
   announce the release of GCC version 2.95.3.

Release History

   GCC 2.95.3
          March 16, 2001

   GCC 2.95.2
          October 27, 1999

   GCC 2.95.1
          August 19, 1999

   GCC 2.95
          July 31, 1999. This is the first release of GCC since the April 1999
          GCC/EGCS reunification and includes nearly a year's worth of new
          development and bugfixes.

References and Acknowledgements

   GCC used to stand for the GNU C Compiler, but since the compiler supports
   several other languages aside from C, it now stands for the GNU Compiler
   Collection.

   The whole suite has been extensively [1]regression tested and [2]package
   tested. It should be reliable and suitable for widespread use.

   The compiler has several new optimizations, new targets, new languages and
   other new features. See the [3]new features page for a more complete list of
   new features found in the GCC 2.95 releases.

   The sources include installation instructions in both HTML and plaintext
   forms in the install directory in the distribution. However, the most up to
   date [4]installation instructions and [5]build/test status are on the web
   pages. We will update those pages as new information becomes available.

   The  GCC  developers would like to thank the numerous people that have
   contributed  new  features,  test  results, bugfixes, etc to GCC. This
   [6]amazing group of volunteers is what makes GCC successful.

   And finally, we can't in good conscience fail to mention some [7]caveats to
   using GCC 2.95.

   Download GCC 2.95 from the [8]GNU FTP server (ftp://ftp.gnu.org)
   [9]Find a GNU mirror site
   [10]Find a GCC mirror site

   For additional information about GCC please see the [11]GCC project web
   server or contact the [12]GCC development mailing list.

   Please send FSF & GNU inquiries & questions to [13]gnu@gnu.org. There are
   also [14]other ways to contact the FSF.

   These pages are maintained by [15]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [16]GCC manuals. If that fails, the [17]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [18]gcc@gnu.org or [19]gcc@gcc.gnu.org. All of
    our lists have [20]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [21]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/gcc-2.95/regress.html
   2. http://gcc.gnu.org/gcc-2.95/othertest.html
   3. http://gcc.gnu.org/gcc-2.95/features.html
   4. http://gcc.gnu.org/install/
   5. http://gcc.gnu.org/gcc-2.95/buildstat.html
   6. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   7. http://gcc.gnu.org/gcc-2.95/caveats.html
   8. ftp://ftp.gnu.org/pub/gnu/gcc/
   9. http://www.gnu.org/order/ftp.html
  10. http://gcc.gnu.org/mirrors.html
  11. http://gcc.gnu.org/index.html
  12. mailto:gcc@gcc.gnu.org
  13. mailto:gnu@gnu.org
  14. http://www.gnu.org/home.html#ContactInfo
  15. http://gcc.gnu.org/about.html
  16. http://gcc.gnu.org/onlinedocs/
  17. mailto:gcc-help@gcc.gnu.org
  18. mailto:gcc@gnu.org
  19. mailto:gcc@gcc.gnu.org
  20. http://gcc.gnu.org/lists.html
  21. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-2.95/features.html

                           GCC 2.95 New Features

     * General Optimizer Improvements:
          + [1]Localized register spilling to improve speed and code density
            especially on small register class machines.
          + [2]Global CSE using lazy code motion algorithms.
          + [3]Improved global constant/copy propagation.
          + [4]Improved control flow graph analysis and manipulation.
          + [5]Local dead store elimination.
          + [6]Memory Load hoisting/store sinking in loops.
          + [7]Type based alias analysis is enabled by default. Note this
            feature will expose bugs in the Linux kernel. Please refer to the
            FAQ (as shipped with GCC 2.95) for additional information on this
            issue.
          + Major revamp of GIV detection, combination and simplification to
            improve loop performance.
          + Major improvements to register allocation and reloading.
     * New Languages and Language specific improvements
          + [8]Many C++ improvements.
          + [9]Many Fortran improvements.
          + [10]Java front-end has been integrated. [11]runtime library is
            available separately.
          + [12]ISO C99 support
          + [13]Chill front-end and runtime has been integrated.
          + Boehm garbage collector support in libobjc.
          + More support for various pragmas which appear in vendor include
            files
     * New Targets and Target Specific Improvements
          + [14]SPARC backend rewrite.
          + -mschedule=8000 will optimize code for PA8000 class processors;
            -mpa-risc-2-0 will generate code for PA2.0 processors
          + Various micro-optimizations for the ia32 port. K6 optimizations
          + Compiler will attempt to align doubles in the stack on the ia32
            port
          + Alpha EV6 support
          + PowerPC 750
          + RS6000/PowerPC: -mcpu=401 was added as an alias for -mcpu=403.
            -mcpu=e603e was added to do -mcpu=603e and -msoft-float.
          + c3x, c4x
          + HyperSPARC
          + SparcLite86x
          + sh4
          + Support  for  new  systems  (OpenBSD, FreeBSD, UWIN, Interix,
            arm-linux)
          + vxWorks targets include support for vxWorks threads
          + StrongARM 110 and ARM9 support added. ARM Scheduling parameters
            rewritten.
          + Various changes to the MIPS port to avoid assembler macros, which
            in turn improves performance
          + Various performance improvements to the i960 port.
          + Major rewrite of ns32k port
     * Other significant improvements
          + [15]Ability to dump cfg information and display it using vcg.
          + The new faster scheme for fixing vendor header files is enabled by
            default.
          + Experimental internationalization support.
          + multibyte character support
          + Some compile-time speedups for pathological problems
          + Better support for complex types
     * Plus the usual mountain of bugfixes
     * Core compiler is based on the gcc2 development tree from Sept 30, 1998,
       so we have all of the [16]features found in GCC 2.8.

Additional Changes in GCC 2.95.1

     * Generic bugfixes and improvements
          + Various documentation fixes related to the GCC/EGCS merger.
          + Fix memory management bug which could lead to spurious aborts, core
            dumps or random parsing errors in the compiler.
          + Fix a couple bugs in the dwarf1 and dwarf2 debug record support.
          + Fix infinite loop in the CSE optimizer.
          + Avoid undefined behavior in compiler FP emulation code
          + Fix install problem when prefix is overridden on the make install
            command.
          + Fix problem with unwanted installation of assert.h on some systems.
          + Fix problem with finding the wrong assembler in a single tree
            build.
          + Avoid increasing the known alignment of a register that is already
            known to be a pointer.
     * Platform specific bugfixes and improvements
          + Codegen bugfix for prologue/epilogue for cpu32 target.
          + Fix long long code generation bug for the Coldfire target.
          + Fix various aborts in the SH compiler.
          + Fix bugs in libgcc support library for the SH.
          + Fix alpha ev6 code generation bug.
          + Fix problems with EXIT_SUCCESS/EXIT_FAILURE redefinitions on AIX
            platforms.
          + Fix -fpic code generation bug for rs6000/ppc svr4 targets.
          + Fix varargs/stdarg code generation bug for rs6000/ppc svr4 targets.
          + Fix weak symbol handling for rs6000/ppc svr4 targets.
          + Fix various problems with 64bit code generation for the rs6000/ppc
            port.
          + Fix codegen bug which caused tetex to be mis-compiled on the x86.
          + Fix compiler abort in new cfg code exposed by x86 port.
          + Fix out of range array reference in code convert flat registers to
            the x87 stacked FP register file.
          + Fix minor vxworks configuration bug.
          + Fix return type of bsearch for SunOS 4.x.
     * Language & Runtime specific fixes.
          + The G++ signature extension has been deprecated. It will be removed
            in the next major release of G++. Use of signatures will result in
            a warning from the compiler.
          + Several bugs relating to templates and namespaces were fixed.
          + A bug that caused crashes when combining templates with -g on
            DWARF1 platforms was fixed.
          + Pointers-to-members, virtual functions, and multiple inheritance
            should now work together correctly.
          + Some code-generation bugs relating to function try blocks were
            fixed.
          + G++ is a little bit more lenient with certain archaic constructs
            than in GCC 2.95.
          + Fix to prevent shared library version #s from bring truncated to 1
            digit
          + Fix missing std:: in the libstdc++ library.
          + Fix stream locking problems in libio.
          + Fix problem in java compiler driver.

Additional Changes in GCC 2.95.2

   The -fstrict-aliasing is not enabled by default for GCC 2.95.2. While the
   optimizations performed by -fstrict-aliasing are valid according to the C
   and C++ standards, the optimization have caused some problems, particularly
   with old non-conforming code.

   The GCC developers are experimenting with ways to warn users about code
   which violates the C/C++ standards, but those warnings are not ready for
   widespread use at this time. Rather than wait for those warnings the GCC
   developers have chosen to disable -fstrict-aliasing by default for the GCC
   2.95.2 release.

   We strongly encourage developers to find and fix code which violates the
   C/C++ standards as -fstrict-aliasing may be enabled by default in future
   releases. Use the option -fstrict-aliasing to re-enable these optimizations.
     * Generic bugfixes and improvements
          + Fix  incorrectly  optimized memory reference in global common
            subexpression elimination (GCSE) optimization pass.
          + Fix code generation bug in regmove.c in which it could incorrectly
            change a "const" value.
          + Fix bug in optimization of conditionals involving volatile memory
            references.
          + Avoid over-allocation of stack space for some procedures.
          + Fixed bug in the compiler which caused incorrect optimization of an
            obscure series of bit manipulations, shifts and arithmetic.
          + Fixed register allocator bug which caused teTeX to be mis-compiled
            on SPARC targets.
          + Avoid incorrect optimization of degenerate case statements for
            certain targets such as the ARM.
          + Fix out of range memory reference in the jump optimizer.
          + Avoid dereferencing null pointer in fix-header.
          + Fix  test for GCC specific features so that it is possible to
            bootstrap with gcc-2.6.2 and older versions of GCC.
          + Fix typo in scheduler which could potentially cause out of range
            memory accesses.
          + Avoid incorrect loop reversal which caused incorrect code for
            certain loops on PowerPC targets.
          + Avoid  incorrect optimization of switch statements on certain
            targets (for example the ARM).
     * Platform specific bugfixes and improvements
          + Work  around bug in Sun V5.0 compilers which caused bootstrap
            comparison failures on SPARC targets.
          + Fix SPARC backend bug which caused aborts in final.c.
          + Fix sparc-hal-solaris2* configuration fragments.
          + Fix bug in sparc block profiling.
          + Fix obscure code generation bug for the PARISC targets.
          + Define __STDC_EXT__ for HPUX configurations.
          + Various POWERPC64 code generation bugfixes.
          + Fix abort for PPC targets using ELF (ex GNU/Linux).
          + Fix collect2 problems for AIX targets.
          + Correct handling of .file directive for PPC targets.
          + Fix bug in fix_trunc x86 patterns.
          + Fix x86 port to correctly pop the FP stack for functions that
            return structures in memory.
          + Fix minor bug in strlen x86 pattern.
          + Use stabs debugging instead of dwarf1 for x86-solaris targets.
          + Fix  template repository code to handle leading underscore in
            mangled names.
          + Fix weak/weak alias support for OpenBSD.
          + GNU/Linux for the ARM has C++ compatible include files.
     * Language & Runtime specific fixes.
          + Fix handling of constructor attribute in the C front-end which
            caused problems building the Chill runtime library on some targets.
          + Fix minor problem merging type qualifiers in the C front-end.
          + Fix aliasing bug for pointers and references (C/C++).
          + Fix incorrect "non-constant initializer bug" when -traditional or
            -fwritable-strings is enabled.
          + Fix build error for Chill front-end on SunOS.
          + Do not complain about duplicate instantiations when using -frepo
            (C++).
          + Fix array bounds handling in C++ front-end which caused problems
            with dwarf debugging information in some circumstances.
          + Fix minor namespace problem.
          + Fix problem linking java programs.

Additional Changes in GCC 2.95.3

     * Generic bugfixes and improvements
          + Fix numerous problems that caused incorrect optimization in the
            register reloading code.
          + Fix numerous problems that caused incorrect optimization in the
            loop optimizer.
          + Fix aborts in the functions build_insn_chain and scan_loops under
            some circumstances.
          + Fix an alias analysis bug.
          + Fix an infinite compilation bug in the combiner.
          + A few problems with complex number support have been fixed.
          + It  is  no longer possible for gcc to act as a fork bomb when
            installed incorrectly.
          + The -fpack-struct option should be recognized now.
          + Fixed a bug that caused incorrect code to be generated due to a
            lost stack adjustment.
     * Platform specific bugfixes and improvements
          + Support building ARM toolchains hosted on Windows.
          + Fix attribute calculations in ARM toolchains.
          + arm-linux support has been improved.
          + Fix a PIC failure on sparc targets.
          + On ix86 targets, the regparm attribute should now work reliably.
          + Several updates for the h8300 port.
          + Fix problem building libio with glibc 2.2.

   Please send FSF & GNU inquiries & questions to [17]gnu@gnu.org. There are
   also [18]other ways to contact the FSF.

   These pages are maintained by [19]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [20]GCC manuals. If that fails, the [21]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [22]gcc@gnu.org or [23]gcc@gcc.gnu.org. All of
    our lists have [24]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [25]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/news/spill.html
   2. http://gcc.gnu.org/news/lcm.html
   3. http://gcc.gnu.org/news/cprop.html
   4. http://gcc.gnu.org/news/cfg.html
   5. http://gcc.gnu.org/news/dse.html
   6. http://gcc.gnu.org/news/hoist.html
   7. http://gcc.gnu.org/news/alias.html
   8. http://gcc.gnu.org/gcc-2.95/c++features.html
   9. http://gcc.gnu.org/onlinedocs/g77/News.html
  10. http://gcc.gnu.org/java/gcj-announce.txt
  11. http://gcc.gnu.org/news/javaannounce.html
  12. http://gcc.gnu.org/c99status.html
  13. http://gcc.gnu.org/news/chill.html
  14. http://gcc.gnu.org/news/sparc.html
  15. http://gcc.gnu.org/news/egcs-vcg.html
  16. http://gcc.gnu.org/egcs-1.0/features-2.8.html
  17. mailto:gnu@gnu.org
  18. http://www.gnu.org/home.html#ContactInfo
  19. http://gcc.gnu.org/about.html
  20. http://gcc.gnu.org/onlinedocs/
  21. mailto:gcc-help@gcc.gnu.org
  22. mailto:gcc@gnu.org
  23. mailto:gcc@gcc.gnu.org
  24. http://gcc.gnu.org/lists.html
  25. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-2.95/caveats.html

                              GCC 2.95 Caveats

     * GCC 2.95 will issue an error for invalid asm statements that had been
       silently  accepted  by  earlier  versions of the compiler. This is
       particularly noticeable when compiling older versions of the Linux
       kernel (2.0.xx). Please refer to the FAQ (as shipped with GCC 2.95) for
       more information on this issue.
     * GCC 2.95 implements type based alias analysis to disambiguate memory
       references.  Some  programs, particularly the Linux kernel violate
       ANSI/ISO aliasing rules and therefore may not operate correctly when
       compiled with GCC 2.95. Please refer to the FAQ (as shipped with GCC
       2.95) for more information on this issue.
     * GCC 2.95 has a known bug in its handling of complex variables for 64bit
       targets. Instead of silently generating incorrect code, GCC 2.95 will
       issue a fatal error for situations it can not handle. This primarily
       affects the Fortran community as Fortran makes more use of complex
       variables than C or C++.
     * GCC 2.95 has an integrated libstdc++, but does not have an integrated
       libg++. Furthermore old libg++ releases will not work with GCC 2.95. You
       can retrieve a recent copy of libg++ from the [1]GCC ftp server.
       Note most C++ programs only need libstdc++.
     * Exception handling may not work with shared libraries, particularly on
       alphas,  hppas, rs6000/powerpc and mips based platforms. Exception
       handling  is  known to work on x86 GNU/Linux platforms with shared
       libraries.
     * In general, GCC 2.95 is more rigorous about rejecting invalid C++ code
       or deprecated C++ constructs than G++ 2.7, G++ 2.8, EGCS 1.0, or EGCS
       1.1. As a result it may be necessary to fix C++ code before it will
       compile with GCC 2.95.
     * G++ is also converting toward the ISO C++ standard; as a result code
       which was previously valid (and thus accepted by other compilers and
       older versions of g++) may no longer be accepted. The flag -fpermissive
       may allow some non-conforming code to compile with GCC 2.95.
     * GCC 2.95 compiled C++ code is not binary compatible with EGCS 1.1.x,
       EGCS 1.0.x or GCC 2.8.x.
     * GCC 2.95 does not have changes from the GCC 2.8 tree that were made
       between Sept 30, 1998 and April 30, 1999 (the official end of the GCC
       2.8 project). Future GCC releases will include all the changes from the
       defunct GCC 2.8 sources.

   Please send FSF & GNU inquiries & questions to [2]gnu@gnu.org. There are
   also [3]other ways to contact the FSF.

   These pages are maintained by [4]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [5]GCC manuals. If that fails, the [6]gcc-help@gcc.gnu.org mailing list
    might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [7]gcc@gnu.org or [8]gcc@gcc.gnu.org. All of our
    lists have [9]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [10]Valid XHTML 1.0 

References

   1. ftp://gcc.gnu.org/pub/gcc/infrastructure/libg++-2.8.1.3.tar.gz
   2. mailto:gnu@gnu.org
   3. http://www.gnu.org/home.html#ContactInfo
   4. http://gcc.gnu.org/about.html
   5. http://gcc.gnu.org/onlinedocs/
   6. mailto:gcc-help@gcc.gnu.org
   7. mailto:gcc@gnu.org
   8. mailto:gcc@gcc.gnu.org
   9. http://gcc.gnu.org/lists.html
  10. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.1/index.html

                                  EGCS 1.1

   September 3, 1998: We are pleased to announce the release of EGCS 1.1.
   December 1, 1998: We are pleased to announce the release of EGCS 1.1.1.
   March 15, 1999: We are pleased to announce the release of EGCS 1.1.2.

   EGCS  is a free software project to further the development of the GNU
   compilers using an open development environment.

   EGCS 1.1 is a major new release of the EGCS compiler system. It has been
   [1]extensively  tested  and  is believed to be stable and suitable for
   widespread use.

   EGCS 1.1 is based on an June 6, 1998 snapshot of the GCC 2.8 development
   sources; it contains all of the new features found in GCC 2.8.1 as well as
   all new development from GCC up to June 6, 1998.

   EGCS 1.1 also contains many improvements and features not found in GCC or in
   older versions of EGCS:
     * Global  common  subexpression elimination and global constant/copy
       propagation (aka [2]gcse)
     * Ongoing improvements to the [3]alias analysis support to allow for
       better optimizations throughout the compiler.
     * Vastly improved [4]C++ compiler and integrated C++ runtime libraries.
     * Fixes for the /tmp symlink race security problems.
     * New targets including mips16, arm-thumb and 64 bit PowerPC.
     * Improvements to GNU Fortran (g77) compiler and runtime library made
       since g77 version 0.5.23.

   See the [5]new features page for a more complete list of new features found
   in EGCS 1.1 releases.

   EGCS 1.1.1 is a minor update to fix several serious problems in EGCS 1.1:
     * General improvements and fixes
          + Avoid some stack overflows when compiling large functions.
          + Avoid incorrect loop invariant code motions.
          + Fix some core dumps on Linux kernel code.
          + Bring back the imake -Di386 and friends fix from EGCS 1.0.2.
          + Fix code generation problem in gcse.
          + Various documentation related fixes.
     * g++/libstdc++ improvements and fixes
          + MT safe EH fix for setjmp/longjmp based exception handling.
          + Fix a few bad interactions between optimization and exception
            handling.
          + Fixes for demangling of template names starting with "__".
          + Fix a bug that would fail to run destructors in some cases with
            -O2.
          + Fix 'new' of classes with virtual bases.
          + Fix crash building Qt on the Alpha.
          + Fix failure compiling WIFEXITED macro on GNU/Linux.
          + Fix some -frepo failures.
     * g77 and libf2c improvements and fixes
          + Various documentation fixes.
          + Avoid compiler crash on RAND intrinsic.
          + Fix minor bugs in makefiles exposed by BSD make programs.
          + Define _XOPEN_SOURCE for libI77 build to avoid potential problems
            on some 64-bit systems.
          + Fix problem with implicit endfile on rewind.
          + Fix spurious recursive I/O errors.
     * platform specific improvements and fixes
          + Match all versions of UnixWare7.
          + Do not assume x86 SVR4 or UnixWare targets can handle stabs.
          + Fix PPC/RS6000 LEGITIMIZE_ADDRESS macro and bug in conversion from
            unsigned ints to double precision floats.
          + Fix ARM ABI issue with NetBSD.
          + Fix a few arm code generation bugs.
          + Fixincludes will fix additional broken SCO OpenServer header files.
          + Fix  a m68k backend bug which caused invalid offsets in reg+d
            addresses.
          + Fix problems with 64bit AIX 4.3 support.
          + Fix handling of long longs for varargs/stdarg functions on the ppc.
          + Minor fixes to CPP predefines for Windows.
          + Fix code generation problems with gpr<->fpr copies for 64bit ppc.
          + Fix a few coldfire code generation bugs.
          + Fix some more header file problems on SunOS 4.x.
          + Fix assert.h handling for RTEMS.
          + Fix Windows handling of TREE_SYMBOL_REFERENCED.
          + Fix x86 compiler abort in reg-stack pass.
          + Fix cygwin/windows problem with section attributes.
          + Fix Alpha code generation problem exposed by SMP Linux kernels.
          + Fix typo in m68k 32->64bit integer conversion.
          + Make  sure  target libraries build with -fPIC for PPC & Alpha
            targets.

   EGCS 1.1.2 is a minor update to fix several serious problems in EGCS 1.1.1:
     * General improvements and fixes
          + Fix bug in loop optimizer which caused the SPARC (and potentially
            other) ports to segfault.
          + Fix infinite recursion in alias analysis and combiner code.
          + Fix bug in regclass preferencing.
          + Fix incorrect loop reversal which caused incorrect code to be
            generated for several targets.
          + Fix return value for builtin memcpy.
          + Reduce compile time for certain loops which exposed quadratic
            behavior in the loop optimizer.
          + Fix bug which caused volatile memory to be written multiple times
            when only one write was needed/desired.
          + Fix compiler abort in caller-save.c
          + Fix combiner bug which caused incorrect code generation for certain
            division by constant operations.
          + Fix  incorrect  code  generation  due to a bug in range check
            optimizations.
          + Fix incorrect code generation due to mis-handling of clobbered
            values in CSE.
          + Fix compiler abort/segfault due to incorrect register splitting
            when unrolling loops.
          + Fix  code generation involving autoincremented addresses with
            ternary operators.
          + Work around bug in the scheduler which caused qt to be mis-compiled
            on some platforms.
          + Fix code generation problems with -fshort-enums.
          + Tighten security for temporary files.
          + Improve compile time for codes which make heavy use of overloaded
            functions.
          + Fix multiply defined constructor/destructor symbol problems.
          + Avoid setting bogus RPATH environment variable during bootstrap.
          + Avoid GNU-make dependencies in the texinfo subdir.
          + Install  CPP wrapper script in $(prefix)/bin if --enable-cpp.
            --enable-cpp=<dirname> can be used to specify an additional install
            directory for the cpp wrapper script.
          + Fix CSE bug which caused incorrect label-label refs to appear on
            some platforms.
          + Avoid linking in EH routines from libgcc if they are not needed.
          + Avoid obscure bug in aliasing code.
          + Fix bug in weak symbol handling.
     * Platform-specific improvements and fixes
          + Fix detection of PPro/PII on Unixware 7.
          + Fix compiler segfault when building spec99 and other programs for
            SPARC targets.
          + Fix code-generation bugs for integer and floating point conditional
            move instructions on the PPro/PII.
          + Use fixincludes to fix byteorder problems on i?86-*-sysv.
          + Fix build failure for the arc port.
          + Fix floating point format configuration for i?86-gnu port.
          + Fix problems with hppa1.0-hp-hpux10.20 configuration when threads
            are enabled.
          + Fix coldfire code generation bugs.
          + Fix "unrecognized insn" problems for Alpha and PPC ports.
          + Fix h8/300 code generation problem with floating point values in
            memory.
          + Fix unrecognized insn problems for the m68k port.
          + Fix namespace-pollution problem for the x86 port.
          + Fix problems with old assembler on x86 NeXT systems.
          + Fix PIC code-generation problems for the SPARC port.
          + Fix minor bug with LONG_CALLS in PowerPC SVR4 support.
          + Fix minor ISO namespace violation in Alpha varargs/stdarg support.
          + Fix incorrect "braf" instruction usage for the SH port.
          + Fix minor bug in va-sh which prevented its use with -ansi.
          + Fix problems recognizing and supporting FreeBSD.
          + Handle OpenBSD systems correctly.
          + Minor fixincludes fix for Digital UNIX 4.0B.
          + Fix problems with ctors/dtors in SCO shared libraries.
          + Abort instead of generating incorrect code for PPro/PII floating
            point conditional moves.
          + Avoid  multiply  defined  symbols  on Linux/GNU systems using
            libc-5.4.xx.
          + Fix abort in alpha compiler.
     * Fortran-specific fixes
          + Fix the IDate intrinsic (VXT) (in libg2c) so the returned year is
            in the documented, non-Y2K-compliant range of 0-99, instead of
            being returned as 100 in the year 2000.
          + Fix  the  `Date_and_Time' intrinsic (in libg2c) to return the
            milliseconds value properly in Values(8).
          + Fix  the  `LStat'  intrinsic  (in libg2c) to return device-ID
            information properly in SArray(7).

   Each release includes installation instructions in both HTML and plaintext
   forms  (see  the  INSTALL  directory  in the toplevel directory of the
   distribution). However, we also keep the most up to date [6]installation
   instructions and [7]build/test status on our web page. We will update those
   pages as new information becomes available.

   The  EGCS  project  would  like to thank the numerous people that have
   contributed new features, test results, bugfixes, etc. This [8]amazing group
   of volunteers is what makes EGCS successful.

   And finally, we can't in good conscience fail to mention some [9]caveats to
   using EGCS 1.1.

   Download EGCS from egcs.cygnus.com (USA California).

   The EGCS 1.1 release is also available on many mirror sites.
   [10]Goto mirror list to find a closer site.

   Please send FSF & GNU inquiries & questions to [11]gnu@gnu.org. There are
   also [12]other ways to contact the FSF.

   These pages are maintained by [13]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [14]GCC manuals. If that fails, the [15]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [16]gcc@gnu.org or [17]gcc@gcc.gnu.org. All of
    our lists have [18]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [19]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/egcs-1.1/egcs-1.1-test.html
   2. http://gcc.gnu.org/news/gcse.html
   3. http://gcc.gnu.org/news/alias.html
   4. http://gcc.gnu.org/egcs-1.1/c++features.html
   5. http://gcc.gnu.org/egcs-1.1/features.html
   6. http://gcc.gnu.org/install/
   7. http://gcc.gnu.org/egcs-1.1/buildstat.html
   8. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   9. http://gcc.gnu.org/egcs-1.1/caveats.html
  10. http://gcc.gnu.org/mirrors.html
  11. mailto:gnu@gnu.org
  12. http://www.gnu.org/home.html#ContactInfo
  13. http://gcc.gnu.org/about.html
  14. http://gcc.gnu.org/onlinedocs/
  15. mailto:gcc-help@gcc.gnu.org
  16. mailto:gcc@gnu.org
  17. mailto:gcc@gcc.gnu.org
  18. http://gcc.gnu.org/lists.html
  19. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.1/features.html

                           EGCS 1.1 new features

     * Integrated  GNU  Fortran  (g77)  compiler and runtime library with
       improvements, based on [1]g77 version 0.5.23.
     * Vast improvements in the C++ compiler; so many they have [2]page of
       their own!
     * Compiler implements [3]global common subexpression elimination and
       global copy/constant propagation.
     * More major improvements in the [4]alias analysis code.
     * More  major improvements in the exception handling code to improve
       performance, lower static overhead and provide the infrastructure for
       future improvements.
     * The infamous /tmp symlink race security problems have been fixed.
     * The regmove optimization pass has been nearly completely rewritten to
       improve performance of generated code.
     * The compiler now recomputes register usage information before local
       register allocation. By providing more accurate information to the
       priority based allocator, we get better register allocation.
     * The register reloading phase of the compiler optimizes spill code much
       better than in previous releases.
     * Some bad interactions between the register allocator and instruction
       scheduler have been fixed, resulting in much better code for certain
       programs. Additionally, we have tuned the scheduler in various ways to
       improve performance of generated code for some architectures.
     * The compiler's branch shortening algorithms have been significantly
       improved to work better on targets which align jump targets.
     * The compiler now supports -Os to prefer optimizing for code space over
       optimizing for code speed.
     * The compiler will now totally eliminate library calls which compute
       constant values. This primarily helps targets with no integer div/mul
       support and targets without floating point support.
     * The compiler now supports an extensive "--help" option.
     * cpplib has been greatly improved and may be suitable for limited use.
     * Memory footprint for the compiler has been significantly reduced for
       some pathological cases.
     * The  time  to  build  EGCS  has  been improved for certain targets
       (particularly the alpha and mips platforms).
     * Many infrastructure improvements throughout the compiler, plus the usual
       mountain of bugfixes and minor improvements.
     * Target dependent improvements:
          + SPARC  port  now  includes  V8 plus and V9 support as well as
            performance tuning for Ultra class machines. The SPARC port now
            uses the Haifa scheduler.
          + Alpha  port  has  been tuned for the EV6 processor and has an
            optimized expansion of memcpy/bzero. The Alpha port now uses the
            Haifa scheduler.
          + RS6000/PowerPC: support for the Power64 architecture and AIX 4.3.
            The RS6000/PowerPC port now uses the Haifa scheduler.
          + x86: Alignment of static store data and jump targets is per Intel
            recommendations now. Various improvements throughout the x86 port
            to improve performance on Pentium processors (including improved
            epilogue sequences for Pentium chips and backend improvements which
            should help register allocation on all x86 variants. Conditional
            move support has been fixed and enabled for PPro processors. The
            x86 port also better supports 64bit operations now. Unixware 7, a
            System V Release 5 target, is now supported and SCO OpenServer
            targets can support GAS.
          + MIPS has improved multiply/multiply-add support and now includes
            mips16 ISA support.
          + M68k has many micro-optimizations and Coldfire fixes.
     * Core compiler is based on the GCC development tree from June 9, 1998, so
       we have all of the [5]features found in GCC 2.8.

   Please send FSF & GNU inquiries & questions to [6]gnu@gnu.org. There are
   also [7]other ways to contact the FSF.

   These pages are maintained by [8]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [9]GCC manuals. If that fails, the [10]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [11]gcc@gnu.org or [12]gcc@gcc.gnu.org. All of
    our lists have [13]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [14]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/onlinedocs/g77/News.html
   2. http://gcc.gnu.org/egcs-1.1/c++features.html
   3. http://gcc.gnu.org/news/gcse.html
   4. http://gcc.gnu.org/news/alias.html
   5. http://gcc.gnu.org/egcs-1.0/features-2.8.html
   6. mailto:gnu@gnu.org
   7. http://www.gnu.org/home.html#ContactInfo
   8. http://gcc.gnu.org/about.html
   9. http://gcc.gnu.org/onlinedocs/
  10. mailto:gcc-help@gcc.gnu.org
  11. mailto:gcc@gnu.org
  12. mailto:gcc@gcc.gnu.org
  13. http://gcc.gnu.org/lists.html
  14. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.1/caveats.html

                              EGCS 1.1 Caveats

     * EGCS  has an integrated libstdc++, but does not have an integrated
       libg++. Furthermore old libg++ releases will not work with EGCS; HJ Lu
       has made a libg++-2.8.1.2 snapshot available which may work with EGCS.
       Note most C++ programs only need libstdc++.
     * Exception handling may not work with shared libraries, particularly on
       alphas,  hppas, rs6000/powerpc and mips based platforms. Exception
       handling is known to work on x86-linux platforms with shared libraries.
     * Some versions of the Linux kernel have bugs which prevent them from
       being compiled or from running when compiled by EGCS. See the FAQ (as
       shipped with EGCS 1.1) for additional information.
     * In general, EGCS is more rigorous about rejecting invalid C++ code or
       deprecated C++ constructs than g++-2.7, g++-2.8 or EGCS 1.0. As a result
       it may be necessary to fix C++ code before it will compile with EGCS.
     * G++ is also converting toward the ISO C++ standard; as a result code
       which was previously valid (and thus accepted by other compilers and
       older versions of g++) may no longer be accepted.
     * EGCS 1.1 compiled C++ code is not binary compatible with EGCS 1.0.x or
       GCC 2.8.x due to changes necessary to support thread safe exception
       handling.

   Please send FSF & GNU inquiries & questions to [1]gnu@gnu.org. There are
   also [2]other ways to contact the FSF.

   These pages are maintained by [3]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [4]GCC manuals. If that fails, the [5]gcc-help@gcc.gnu.org mailing list
    might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [6]gcc@gnu.org or [7]gcc@gcc.gnu.org. All of our
    lists have [8]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [9]Valid XHTML 1.0 

References

   1. mailto:gnu@gnu.org
   2. http://www.gnu.org/home.html#ContactInfo
   3. http://gcc.gnu.org/about.html
   4. http://gcc.gnu.org/onlinedocs/
   5. mailto:gcc-help@gcc.gnu.org
   6. mailto:gcc@gnu.org
   7. mailto:gcc@gcc.gnu.org
   8. http://gcc.gnu.org/lists.html
   9. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.0/index.html

                                  EGCS 1.0

   December 3, 1997: We are pleased to announce the release of EGCS 1.0.
   January 6, 1998: We are pleased to announce the release of EGCS 1.0.1.
   March 16, 1998: We are pleased to announce the release of EGCS 1.0.2.
   May 15, 1998 We are pleased to announce the release of EGCS 1.0.3.

   EGCS is a collaborative effort involving several groups of hackers using an
   open  development  model  to accelerate development and testing of GNU
   compilers and runtime libraries.

   An important goal of EGCS is to allow wide scale testing of experimental
   features and optimizations; therefore, EGCS contains some features and
   optimizations which are still under development. However, EGCS has been
   carefully tested and should be comparable in quality to most GCC releases.

   EGCS 1.0 is based on an August 2, 1997 snapshot of the GCC 2.8 development
   sources; it contains nearly all of the new features found in GCC 2.8.

   EGCS 1.0 also contains many improvements and features not found in GCC 2.7
   and even the GCC 2.8 series (which was released after the original EGCS 1.0
   release).
     * Integrated C++ runtime libraries, including support for most major
       GNU/Linux systems!
     * The integrated libstdc++ library includes a verbatim copy of SGI's STL
       release.
     * Integrated GNU Fortran compiler.
     * New instruction scheduler.
     * New alias analysis code.

   See the [1]new features page for a more complete list of new features.

   EGCS 1.0.1 is a minor update to the EGCS 1.0 compiler to fix a few critical
   bugs and add support for Red Hat 5.0 Linux. Changes since the EGCS 1.0
   release:
     * Add support for Red Hat 5.0 Linux and better support for Linux systems
       using glibc2.
       Many programs failed to link when compiled with EGCS 1.0 on Red Hat 5.0
       or on systems with newer versions of glibc2. EGCS 1.0.1 should fix these
       problems.
     * Compatibility with both EGCS 1.0 and GCC 2.8 libgcc exception handling
       interfaces.
       To avoid future compatibility problems, we strongly urge anyone who is
       planning on distributing shared libraries that contain C++ code to
       upgrade to EGCS 1.0.1 first.
       Soon  after  EGCS  1.0  was released, the GCC developers made some
       incompatible changes in libgcc's exception handling interfaces. These
       changes were needed to solve problems on some platforms. This means that
       GCC 2.8.0, when released, will not be seamlessly compatible with shared
       libraries built by EGCS 1.0. The reason is that the libgcc.a in GCC
       2.8.0 will not contain a function needed by the old interface.
       The result of this is that there may be compatibility problems with
       shared libraries built by EGCS 1.0 when used with GCC 2.8.0.
       With EGCS 1.0.1, generated code uses the new (GCC 2.8.0) interface, and
       libgcc.a  has  the  support  routines for both the old and the new
       interfaces (so EGCS 1.0.1 and EGCS 1.0 code can be freely mixed, and
       EGCS 1.0.1 and GCC 2.8.0 code can be freely mixed).
       The maintainers of GCC 2.x have decided against including seamless
       support for the old interface in 2.8.0, since it was never "official",
       so  to  avoid  future  compatibility problems we recommend against
       distributing any shared libraries built by EGCS 1.0 that contain C++
       code (upgrade to 1.0.1 and use that).
     * Various bugfixes in the x86, hppa, mips, and rs6000/ppc backends.
       The x86 changes fix code generation errors exposed when building glibc2
       and the Linux dynamic linker (ld.so).
       The hppa change fixes a compiler abort when configured for use with
       RTEMS.
       The MIPS changes fix problems with the definition of LONG_MAX on newer
       systems, allow for command line selection of the target ABI, and fix one
       code generation problem.
       The rs6000/ppc change fixes some problems with passing structures to
       varargs/stdarg functions.
     * A few machine independent bugfixes, mostly to fix code generation errors
       when building Linux kernels or glibc.
     * Fix a few critical exception handling and template bugs in the C++
       compiler.
     * Fix Fortran namelist bug on alphas.
     * Fix build problems on x86-solaris systems.

   EGCS 1.0.2 is a minor update to the EGCS 1.0.1 compiler to fix several
   serious problems in EGCS 1.0.1.
     * General improvements and fixes
          + Memory consumption significantly reduced, especially for templates
            and inline functions.
          + Fix various problems with glibc2.1.
          + Fix loop optimization bug exposed by rs6000/ppc port.
          + Fix to avoid potential code generation problems in jump.c.
          + Fix some undefined symbol problems in dwarf1 debug support.
     * g++/libstdc++ improvements and fixes
          + libstdc++ in the EGCS release has been updated and should be link
            compatible with libstdc++-2.8.
          + Various fixes in libio/libstdc++ to work better on Linux systems.
          + Fix problems with duplicate symbols on systems that do not support
            weak symbols.
          + Memory corruption bug and undefined symbols in bastring have been
            fixed.
          + Various exception handling fixes.
          + Fix compiler abort for very long thunk names.
     * g77 improvements and fixes
          + Fix compiler crash for omitted bound in Fortran CASE statement.
          + Add missing entries to g77 lang-options.
          + Fix problem with -fpedantic in the g77 compiler.
          + Fix "backspace" problem with g77 on alphas.
          + Fix x86 backend problem with Fortran literals and -fpic.
          + Fix  some of the problems with negative subscripts for g77 on
            alphas.
          + Fixes for Fortran builds on cygwin32/mingw32.
     * platform specific improvements and fixes
          + Fix long double problems on x86 (exposed by glibc).
          + x86 ports define i386 again to keep imake happy.
          + Fix exception handling support on NetBSD ports.
          + Several changes to collect2 to fix many problems with AIX.
          + Define __ELF__ for rs6000/linux.
          + Fix -mcall-linux problem on rs6000/linux.
          + Fix stdarg/vararg problem for rs6000/linux.
          + Allow autoconf to select a proper install problem on AIX 3.1.
          + m68k  port  support  includes -mcpu32 option as well as cpu32
            multilibs.
          + Fix stdarg bug for irix6.
          + Allow EGCS to build on irix5 without the gnu assembler.
          + Fix problem with static linking on sco5.
          + Fix bootstrap on sco5 with native compiler.
          + Fix for abort building newlib on H8 target.
          + Fix fixincludes handling of math.h on SunOS.
          + Minor fix for Motorola 3300 m68k systems.

   EGCS  1.0.3  is a minor update to the EGCS 1.0.2 compiler to fix a few
   problems reported by Red Hat for builds of Red Hat 5.1.
     * Generic bugfixes:
          + Fix  a  typo in the libio library which resulted in incorrect
            behavior of istream::get.
          + Fix the Fortran negative array index problem.
          + Fix a major problem with the ObjC runtime thread support exposed by
            glibc2.
          + Reduce memory consumption of the Haifa scheduler.
     * Target specific bugfixes:
          + Fix one x86 floating point code generation bug exposed by glibc2
            builds.
          + Fix one x86 internal compiler error exposed by glibc2 builds.
          + Fix profiling bugs on the Alpha.
          + Fix ImageMagick & emacs 20.2 build problems on the Alpha.
          + Fix rs6000/ppc bug when converting values from integer types to
            floating point types.

   The EGCS 1.0 releases include installation instructions in both HTML and
   plaintext forms (see the INSTALL directory in the toplevel directory of the
   distribution). However, we also keep the most up to date [2]installation
   instructions and [3]build/test status on our web page. We will update those
   pages as new information becomes available.

   And, we can't in good conscience fail to mention some [4]caveats to using
   EGCS.

   Update:  Big  thanks  to  Stanford for providing a high speed link for
   downloading EGCS (go.cygnus.com)!

   Download EGCS from ftp.cygnus.com (USA California) or go.cygnus.com (USA
   California -- High speed link provided by Stanford).

   The EGCS 1.0 release is also available many mirror sites.
   [5]Goto mirror list to find a closer site

   We'd like to thank the numerous people that have contributed new features,
   test results, bugfixes, etc. Unfortunately, they're far too numerous to
   mention by name.

   Please send FSF & GNU inquiries & questions to [6]gnu@gnu.org. There are
   also [7]other ways to contact the FSF.

   These pages are maintained by [8]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [9]GCC manuals. If that fails, the [10]gcc-help@gcc.gnu.org mailing
    list might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [11]gcc@gnu.org or [12]gcc@gcc.gnu.org. All of
    our lists have [13]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [14]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/egcs-1.0/features.html
   2. http://gcc.gnu.org/install/
   3. http://gcc.gnu.org/egcs-1.0/buildstat.html
   4. http://gcc.gnu.org/egcs-1.0/caveats.html
   5. http://gcc.gnu.org/mirrors.html
   6. mailto:gnu@gnu.org
   7. http://www.gnu.org/home.html#ContactInfo
   8. http://gcc.gnu.org/about.html
   9. http://gcc.gnu.org/onlinedocs/
  10. mailto:gcc-help@gcc.gnu.org
  11. mailto:gcc@gnu.org
  12. mailto:gcc@gcc.gnu.org
  13. http://gcc.gnu.org/lists.html
  14. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.0/features.html

                             EGCS 1.0 features

     * Core compiler is based on the gcc2 development tree from Aug 2, 1997, so
       we have most of the [1]features found in GCC 2.8.
     * Integrated GNU Fortran compiler based on g77-0.5.22-19970929.
     * Vast improvements in the C++ compiler; so many they have [2]page of
       their own!
     * Integrated C++ runtime libraries, including support for most major linux
       systems!
     * New instruction scheduler from IBM Haifa which includes support for
       function wide instruction scheduling as well as superscalar scheduling.
     * Significantly improved alias analysis code.
     * Improved register allocation for two address machines.
     * Significant code generation improvements for Fortran code on Alphas.
     * Various optimizations from the g77 project as well as improved loop
       optimizations.
     * Dwarf2 debug format support for some targets.
     * egcs libstdc++ includes the SGI STL implementation without changes.
     * As a result of these and other changes, egcs libstc++ is not binary
       compatible with previous releases of libstdc++.
     * Various new ports -- UltraSPARC, Irix6.2 & Irix6.3 support, The SCO
       Openserver 5 family (5.0.{0,2,4} and Internet FastStart 1.0 and 1.1),
       Support for RTEMS on several embedded targets, Support for arm-linux,
       Mitsubishi M32R, Hitachi H8/S, Matsushita MN102 and MN103, NEC V850,
       Sparclet, Solaris & Linux on PowerPCs, etc.
     * Integrated testsuites for gcc, g++, g77, libstdc++ and libio.
     * RS6000/PowerPC ports generate code which can run on all RS6000/PowerPC
       variants by default.
     * -mcpu= and -march= switches for the x86 port to allow better control
       over how the x86 port generates code.
     * Includes the template repository patch (aka repo patch); note the new
       template code makes repo obsolete for ELF systems using gnu-ld such as
       Linux.
     * Plus the usual assortment of bugfixes and improvements.

   Please send FSF & GNU inquiries & questions to [3]gnu@gnu.org. There are
   also [4]other ways to contact the FSF.

   These pages are maintained by [5]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [6]GCC manuals. If that fails, the [7]gcc-help@gcc.gnu.org mailing list
    might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [8]gcc@gnu.org or [9]gcc@gcc.gnu.org. All of our
    lists have [10]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [11]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/egcs-1.0/features-2.8.html
   2. http://gcc.gnu.org/egcs-1.0/c++features.html
   3. mailto:gnu@gnu.org
   4. http://www.gnu.org/home.html#ContactInfo
   5. http://gcc.gnu.org/about.html
   6. http://gcc.gnu.org/onlinedocs/
   7. mailto:gcc-help@gcc.gnu.org
   8. mailto:gcc@gnu.org
   9. mailto:gcc@gcc.gnu.org
  10. http://gcc.gnu.org/lists.html
  11. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.0/caveats.html

                              EGCS 1.0 Caveats

     * EGCS  has an integrated libstdc++, but does not have an integrated
       libg++. Furthermore old libg++ releases will not work with egc; HJ Lu
       has made a libg++-2.8.1.2 available which may work with EGCS.
       Note most C++ programs only need libstdc++.
     * Note that using -pedantic or -Wreturn-type can cause an explosion in the
       amount of memory needed for template-heavy C++ code, such as code that
       uses STL. Also note that -Wall includes -Wreturn-type, so if you use
       -Wall you will need to specify -Wno-return-type to turn it off.
     * Exception handling may not work with shared libraries, particularly on
       alphas, hppas, and mips based platforms. Exception handling is known to
       work on x86-linux platforms with shared libraries.
     * Some versions of the Linux kernel have bugs which prevent them from
       being compiled or from running when compiled by EGCS. See the FAQ (as
       shipped with EGCS 1.0) for additional information.
     * In general, EGCS is more rigorous about rejecting invalid C++ code or
       deprecated C++ constructs than G++ 2.7. As a result it may be necessary
       to fix C++ code before it will compile with EGCS.
     * G++ is also aggressively tracking the C++ standard; as a result code
       which was previously valid (and thus accepted by other compilers and
       older versions of G++) may no longer be accepted.
     * EGCS 1.0 may not work with Red Hat Linux 5.0 on all targets. EGCS 1.0.x
       and later releases should work with Red Hat Linux 5.0.

   Please send FSF & GNU inquiries & questions to [1]gnu@gnu.org. There are
   also [2]other ways to contact the FSF.

   These pages are maintained by [3]the GCC team.


    For questions related to the use of GCC, please consult these web pages and
    the [4]GCC manuals. If that fails, the [5]gcc-help@gcc.gnu.org mailing list
    might help.
    Please send comments on these web pages and the development of GCC to our
    developer mailing list at [6]gcc@gnu.org or [7]gcc@gcc.gnu.org. All of our
    lists have [8]public archives.

   Copyright (C) Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110, USA.

   Verbatim copying and distribution of this entire article is permitted in any
   medium, provided this notice is preserved.
   Last modified 2006-06-21 [9]Valid XHTML 1.0 

References

   1. mailto:gnu@gnu.org
   2. http://www.gnu.org/home.html#ContactInfo
   3. http://gcc.gnu.org/about.html
   4. http://gcc.gnu.org/onlinedocs/
   5. mailto:gcc-help@gcc.gnu.org
   6. mailto:gcc@gnu.org
   7. mailto:gcc@gcc.gnu.org
   8. http://gcc.gnu.org/lists.html
   9. http://validator.w3.org/check/referer
======================================================================
