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
When configuring and bootstrapping with
#!/bin/tcsh
/bin/rm -rf *; env CC='gcc -mcpu=970 -m64' ../configure
--prefix=/pkgs/gcc-test-64 --enable-languages=c --disable-checking; make -j 16
bootstrap BOOT_CFLAGS='-O2 -g -mcpu=970 -m64' >& build.log
bootstrap fails with
/Users/gcc-test/programs/gcc
