[antlr-interest] ANTLR3 build errors

[Daniel Trebbien]

I recently tried to build ANTLR3 from the latest source snapshot (identical
to a999523<https://github.com/antlr/antlr/commit/a9995231e5d16b883ae08b039db3380b84ae4a84>of
the git repository), but I encountered a number of difficulties while
building.  Once built, I then encountered a NullPointerException whenever
running the Tool program.  Are these known issues?

If anyone is interested, I have uploaded a couple of commits that fix these
problems to my fork of antlr/antlr on GitHub:

   1. 6d4fed20<https://github.com/dtrebbien/antlr/commit/6d4fed20fcb0192f0b96511757955ad3c8576c0c>Fix
compilation errors
   2. c8afa2a9<https://github.com/dtrebbien/antlr/commit/c8afa2a9e21968bd67e0f30cf96efd5b08934787>Fix
NullPointerException

See also the diff
a999523...c8afa2a9<https://github.com/dtrebbien/antlr/compare/a9995231e5...c8afa2a9e2>
.

Daniel Trebbien