Build error when using ANT to build Eclipse3.5 source code

I have been trying to build Eclipse3.5 source code to create the corresponding .class files and a single jar file. I have been using ANT to do that. However, I am getting a message Build Failed .. 1 error .. in my console window. If I am building jdtcoresrc part of eclipse source code, it is building successfully. However including the plugins directory or running it separately on plugins is giving this error.

The Eclipse3.5 source code has around 6920 java files, so there were some out of memory p开发者_运维技巧roblems initially. This got fixed by including the attributes : fork="true", memoryinitialsize="1024m", memorymaximumsize="1024m" in the tag of build.xml.

FYI, I have downloaded eclipse-sourceBuild-srcIncluded-3.5.zip file and unzipped it to get the source code for eclipse 3.5.

I am pasting the console output for your reference -

   [javac] [total 342125ms]
    [javac] 1 error

BUILD FAILED
C:\CAG\EclipWorkspace\Eclipse.Build\build.xml:34: Compile failed; see the compiler error output for details.

Total time: 6 minutes 45 seconds

As the error is not explicit, I am not sure whether there are any .jar files and/or dependencies that should be added to complete the build process.

I have not been able to get any help regarding building of eclipse code itself (all tutorials talk about building programs within eclipse). I have successfully built Apache Math source code and another small program, so I believe ANT settings are OK.

Can somebody please help me out? I have been wasting a week on this without much progress.

Thanks in advance