Kawa

In your build directory do:

tar xzf kawa-1.8.tar.gz
cd kawa-1.8

Then you must configure the sources. This you can do the same way you configure most other GNU software. Normally you can just run the configure script with no arguments:

./configure

This will specify that a later make install will install the compiled ‘.class’ files into /usr/local/share/java. If you want them to be installed someplace else, such as $PREFIX/share/java, then specify that when you run configure:

./configure --prefix $PREFIX

If you have the GNU ‘readline’ library installed, you might try adding the ‘--enable-kawa-frontend’ flag. This will build the ‘kawa’ front-end program, which provides input-line editing and an input history. You can get ‘readline’ from archives of GNU programs, including ftp://www.gnu.org/.

If you have Swing installed, and want to use JEmacs (Emacs in Java), also pass the --with-swing flag to configure.

If you have installed Kawa before, make sure your CLASSPATH does not include old versions of Kawa, or other classes that may conflict with the new ones.

If you use a very old or bare-bones Java implementation that not have certain "Java 2" features (such as java.util.List, java.lang.ref, or ThreadLocal) then you need to convert the Kawa source-code so it doesn't depend on those features. You do this with the following command:

make select-java1

Most people should not need to do this. (You don't need to if you're using GCJ, even though it doesn't implement all of Java 2.) (If you need to convert the code back to the default, do: make select-java2.)

Then you need to compile all the .java source files. Just run make:

make

This assumes that ‘java’ and ‘javac’ are the java interpreter and compiler, respectively. For example, if you are using the Kaffe Java interpreter, you need to instead say:

make JAVA=kaffe

You can now test the system by running Kawa in place:

java kawa.repl

or you can run the test suite:

make check

or you can install the compiled files:

make install

This will install your classes into $PREFIX/share/java (and its sub-directories). Here $PREFIX is the directory you specified to configure with the --prefix option, or /usr/local if you did not specify a --prefix option.

To use the installed files, you need to set CLASSPATH so that $PREFIX/share/java/kawa.jar is in the path:

CLASSPATH=$PREFIX/share/java/kawa.jar
export CLASSPATH

This is done automatically if you use the ‘kawa’ script.

Kawa now includes an Ant buildfile (build.xml). Ant is a part of the Apache Jakarta project. If you don't hava Ant installed, get it from http://ant.apache.org/bindownload.cgi. The buildfile should work with Ant 1.3, and has been tested with 1.4.1. and 1.5.1. The build is entirely Java based and works equally well on *nix, Windows, and presumably most any other operating system.

Once Ant has been installed and configured (you may need to set the JAVA_HOME, and ANT_HOME environment variables), you should be able to change to the directory containing the build.xml file, and invoke the ‘ant’ command. With the default settings, a successful build will result in a kawa-1.8.jar in the current directory

There are a few Ant "targets" of interest (they can be supplied on the Ant command line):

There is not yet a test target for running the testsuite.

The are various "properties" that control what ant does. You can override the on the command line or by editing the build.properties file in the same directory as build.xml. For example the build.dir directory tells ant where to build temporary files, and where to leave the resulting .jar file. For example, to leave the generated files in the sub-directory named BUILD do:

ant -Dbuild.dir=BUILD

A sample build.properties is provided and it contains comments explaining many of the options.

Here are a few general properties that help to customize your build:

Here are some Kawa-specific ones (all true/false): with-collections, with-references, with-awt, with-swing, enable-jemacs, and enable-servlet> See the sample build.properties for more information on these.

If you change any of the build properties, you will generally want to do an ‘ant clean’ before building again as the build is often not able to notice that kind of change. In the case of changing a directory path, you would want to do the clean before changing the path.

A special note for NetBeans users: For some reason the build-tools target which compiles an Ant task won't compile with the classpath provided by NetBeans. You may do ‘ant build-tools’ from the command line outside of NetBeans, in which case you will not want to use the clean target as that will delete the tool files as well. You can use the clean-build and/or clean-dist targets as appropriate. Alternatively you can add ant.jar to the build-tools classpath by copying or linking it into a lib/ext directory in Kawa's source directory (the one containing the build.xml file).

Jikes is a Java source-to-bytecode compiler that is much faster than Sun's javac. (Note that this only speeds up building Kawa from source, not actually running Kawa.) The instructions for using jikes are as above, except that you need to specify Jikes at configure time, setting the JAVAC environment variable. If jikes is in your execution path, do:

JAVAC=jikes ./configure

You also need to inform Jikes where it should find the standard Java classes (since Jikes is a compiler only). For example:

CLASSPATH=.:/opt/jdk1.3/jre/lib/rt.jar
export CLASSPATH

The GNU Compiler for the Java(tm) Programming Language (GCJ) is part of the GNU Compiler Collection (GCC). It can compile Java source or bytecode files into native code on supported systems. Version 3.3 or later of GCC is recommended, and only Intel x86-based Linux/GNU system have been tested with Kawa.

First, get and install GCC 3.3. Set PREFIX to where you want to install GCJ, and configure it with these options:

./configure --enable-threads --enable-languages=c++,java --prefix $PREFIX
make bootstrap
make install

Make sure gcj is in your path and refers to the newly-installed version, and if needed, set LD_LIBRARY_PATH to point to the directory where libgcj.so was installed:

PATH=$PREFIX/bin:$PATH
LD_LIBRARY_PATH=$PREFIX/lib
export LD_LIBRARY_PATH

To build Kawa, you need to specify --with-gcj to configure which tells it to use GCJ. Currently you also need to specify --without-awt --without-swing because GCJ does not yet support AWT or Swing:

./configure --with-gcj --without-awt --without-swing --prefix $PREFIX

Then as before:

make
make install

Using the ant method is recommended for building Kawa under Microsoft Windows. You may get an error message "Out of environment space." See http://support.microsoft.com/support/kb/articles/Q230/2/05.ASP for a solution. Alternatively you can run the class org.apache.tools.ant.Main directly from the Ant jar.

The Kawa configure and make process assumes a Unix-like environment. If you want to build Kawa from source under Windows (95, 98, or NT), you could use a Unix empulation package, such as the free Cygwin. However, there are some problems with filenames that make this more complicated than it should be. It should be possible to build Kawa under Cygwin using gcj as descibed above.