Replacing Tomcat's default JSP compiler Jasper with IBM's Jikes compiler

MMBase Installation HOWTO
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# 5. Replacing Tomcat's default JSP compiler Jasper with IBM's Jikes compiler

Since IBM's Java compiler Jikes is performing better than Tomcat's own JSP compiler Jasper, it's recommended to install Jikes instead.

Download the sources of Jikes from IBM's Research website:

      http://jikes.sourceforge.net/

Extract and compile Jikes:

      ./configure --prefix=/usr/local/jikes
      make
      make check
      make install

Check support for the `-encoding` option:

      /usr/local/jikes/bin/jikes -help

To have Jikes output its error messages in a Jasper compatible way, add this `$CATALINA_OPTS` environment variable to `/etc/rc.d/init.d/tomcat`:

      export CATALINA_OPTS="-Dbuild.compiler.emacs=true"

| If you get an error message saying Jikes can not use UTF8 encoding, add the following option as well:
      -DjavaEncoding=ISO-8859-1

Make Jikes your JSP compiler for Tomcat by adding to `/usr/local/tomcat/conf/web.xml`:

      <init-param>
          <param-name>compiler</param-name>
          <param-value>jikes</param-value>
      </init-param>

Since entering the full path to Jikes in `/usr/local/tomcat/conf/web.xml` doesn't seem to work (version 4.1.27), make the jikes program available in your path:

      ln -s /usr/local/jikes/bin/jikes /usr/local/bin/jikes

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