example of using ant to drive a gcj build

[Adam Megacz <gcj at lists dot megacz dot com>]

Here's GCJ.xml, the build file used to build XWT on gcj-supported
targets (Win32, Linux, Solaris) demonstrating the use of gcjh, gcj,
g++, ld, and jikes in a coordinated build.

Note the use of both parallel and serial <apply/>'s -- something make
can't do.  The dependency analysis here is very, very fine-grained --
none of jikes, gcjh, gcj, nor ld will ever be executed unless
absolutely necessary.

I've chosen ease of comprehension over compactness here; there's
nothing stoppping you from putting all the flags for each invocation
on a single line (like make).  That would probably be a better idea
for a build as complex as libgcj's.

  - a


<!-- Copyright 2002 Adam Megacz, see the COPYING file for licensing [GPL] -->
<!--

    Subclasses of org.xwt.plat.GCJ should include a .xml file which
    sets the following properties, then invokes <ant antfile="src/org/xwt/plat/GCJ.xml"/>

        gcc-target    - the gcc target name to use (for example, i686-pc-mingw32)
        linkflags     - extra flags to pass to gcj during the link phase, if any
        binaryname    - the name to give to the final binary

-->

<project name="GCJ" default="build">

    <target name="build">

        <echo message='extracting .class -> .h'/>
        <taskdef name='gcjh' classname='org.xwt.tasks.GCJHTask'>
            <classpath path='bin/'/>                                                                               
        </taskdef>
        <gcjh out='bin-${plat}' classpath='bin'/>

        <echo message='compiling   .java -> .o'/>
        <apply failonerror='true' executable='${gcc-path}/bin/${gcc-target}gcj' dest='bin-${plat}'>
            <arg value='-fCLASSPATH=bin/'/>
            <arg value='-O9'/>
            <arg value='-g'/>
            <arg value='-c'/>
            <srcfile/>
            <arg value='-o'/>
            <targetfile/>
            <fileset dir='src/'>
                <include name='org/xwt/*.java'/>
                <include name='org/xwt/util/*.java'/>
                <include name='org/xwt/plat/GCJ.java'/>
                <include name='org/xwt/plat/${subplat}.java'/>
                <include name='org/bouncycastle/**/*.java'/>
                <include name='org/mozilla/**/*.java'/>
                <exclude name='org/xwt/Trap.java'/>
            </fileset>
            <mapper type='glob' from='*.java' to='*.o'/>
        </apply>

        <!-- we have to turn off optimization here due to a compiler bug -->
        <apply failonerror='true' executable='${gcc-path}/bin/${gcc-target}gcj' dest='bin-${plat}'>
            <arg value='-fCLASSPATH=bin/'/>
            <arg value='-O0'/>
            <arg value='-g'/>
            <arg value='-c'/>
            <srcfile/>
            <arg value='-o'/>
            <targetfile/>
            <fileset dir='src/'>
                <include name='org/xwt/Trap.java'/>
            </fileset>
            <mapper type='glob' from='*.java' to='*.o'/>
        </apply>

        <echo message='compiling     .cc -> .o'/>
        <apply failonerror='true' executable='${gcc-path}/bin/${gcc-target}gcj' dest='bin-${plat}/'>
            <arg value='-g'/>
            <arg value='-Ibin-${plat}'/>
            <arg value='-c'/>
            <srcfile/>
            <arg value='-o'/>
            <targetfile/>
            <fileset dir='src/' includes='org/xwt/plat/${subplat}.cc'/>
            <mapper type='glob' from='*.cc' to='*-nat.o'/>
        </apply>
                                                                              
        <echo message='wrapping    .xwar -> .o'/>
        <apply failonerror='true' executable='${gcc-path}/bin/${gcc-target}gcj' dest='bin-${plat}/'>
            <fileset dir='bin/' includes='**/*.xwar'/>
            <arg value='--resource'/>
            <arg value='org/xwt/builtin.xwar'/>
            <arg value='-c'/>
            <srcfile/>
            <arg value='-o'/>
            <targetfile/>
            <mapper type='glob' from='*.xwar' to='*.o'/>
        </apply>

        <echo message='linking        .o -> ${binaryname}'/>
        <uptodate property="linked" targetfile="bin-${plat}/${binaryname}">
            <srcfiles dir="bin-${plat}/" includes="**/*.o" excludes='*.o'/>
        </uptodate>
        <antcall target="link"/>

    </target>

    <target name="link" unless="linked">
        <apply failonerror='true' executable='${gcc-path}/bin/${gcc-target}gcj' parallel='true'>
            <fileset dir='bin-${plat}/' includes='**/*.o' excludes='*.o'/>
            <arg value='-fCLASSPATH=${gcc-path}/share/libgcj.jar'/>
            <arg value='--main=org.xwt.Main'/>
            <arg line='-o bin-${plat}/${binaryname}'/>
            <srcfile/>
            <arg line='${linkflags}'/>
       </apply>
    </target>

</project>


-- 
"Through your rags I see your vanity"  -- Socrates