Darwin PPC -m64 fortran testing

[Jack Howarth]

    I had forgotten to mention that I've done
some testing of gfortran at -m64 on Darwin PPC
with the residual parts of the TImode patch applied.
Specifically I've been testing the CNS x-ray/nmr
structure refinement program which I've patched to
properly work at 64-bits. CNS has custom heap routines
that required the fortran source to be built with
-fdefault-integer-8 and for the INTEGER define in
dmemory.c to be changed from int to long. With those
changes, the cns program passes all of its testsuite
when built either on x86_64 or Darwin PPC with -m64
using gcc trunk (or gcc 4.1.1 on x86_64).
                  Jack