Bradley,
I would think it would only make sense to try to build 64-bit only using
the --enable-multilib=no and then some incantation of the configure for
a ppc64 target of darwin (which doesn't exist). This really doesn't make
sense to do since, unlike x86_64, Darwin's default libs on both ppc and intel
are 32-bit. Likewise, your probably going to find that on x86_64 linux, gcc
doesn't support building 32-bit without 64-bit support. At least no seemed
to be able to suggest a mechanism to do that in this thread...
http://gcc.gnu.org/ml/gcc-help/2006-05/msg00106.html
Jack
