Problem building 64-bit gcc (v3.0) on sparcv9

[Sigmund Straumsnes]

I'm trying to build a 64-bit version if gcc 3.0 on solaris2.7 (sparcv9).
The 32 bit version built ok (finally), but I'm getting errors on 'make
boostrap' on the 64-bit version.
I've configured with GNU as and ld (from binutils-2.11.2), and ld
segfaults thus:

[...]
collect2: ld terminated with signal 11 [Segmentation Fault], core dumped
/path/to/bin/ld: skipping incompatible /usr/lib/sparcv9/libc.so when
searching for -lc
/path/to/bin/ld: warning: sparc:v9 architecture of input file `./crti.o'
is incompatible with sparc output
[Another 30 or so warnings like that]
make[3]: *** [libgcc_s.so] Error 1
[...]

I've read the helpful post by Juergen Keil to gnu.gcc.help on 2001-07-03
which describes the process, but it seems I'm still lacking something.
Are there any flags I need to set or something? Or do I need to
recompile the linker with different options?

[I've also tried building with as and ld as bundled with solaris, but
that didn't work either.]

[Cross-posting to gnu.utils.bug to report the segfault in the linker.]