Cygwin configure

[Tom Tromey]

>>>>> "Jerome" == Jerome Marc <marcjero@yahoo.com> writes:

Jerome> AC_EXEEXT seems to be required in libjava/configure.in
Jerome> Without this, the EXEEXT variable isn't set by Cygwin automake.

Search in libjava/acinclude.m4 for AC_EXEEXT.  Part of the comment
there is wrong (now we do build a program).

As a test I changed that block of code to just AC_EXEEXT, rebuilt
configure, removed config.cache, and then re-ran configure.  I had
problems, but now I think those aren't related to AC_EXEEXT.

So in sum, doing this is probably safe.  I'll submit a patch once I've
tracked down this other problem and verified it.

Tom