Undoing the inclusion of autom4te.cache into wv-gs tarball as the version I got working when compiling the GS3 release binary by running ant configure-build-src compile-build-src didn't have it. Returning to the tarball with just the aclocal.m4, configure.ac and configure that Dr Bainbridge noticeably changed and retrying my investigations to try to get at a tarball that works.