Compiling JOGL source

I am trying to compile the jogl source code.
I have included all ant and antlr lib in the class path but still a couple of objects can not be resolved:
–GnuCLexer
–GnuCParser
–GNUCTokenTypes
–HeaderParser constructor is not visible… etc…
Is this sun.net.www.HeaderParser? It does not seem so.
Could any one point what is missing here?
Any hint is deeply appreciated.
Thanks

Please see doc/HowToBuild.html in the source base. You need to run ant in order to bulid JOGL; it isn’t possible to import just the sources into an IDE.