o Add AC_HELP_STRING to make strings nice and neat.
o When building with CMUCL, we need to use 32-bit objects, so make
o On Darwin, FLIBS contains -lgfortranbegin, which we don't want when
building our library. Remove it from FLIBS.
o Use F77_32 if necessary to compile the Fortran sources.
o When building the shared library, include -lm -lc.