For Solaris 7, 8 and 9 there are now a select few packages built as 64bit available.
- gcc 4.5.4
- gcc 4.7.3
- gcc 4.8.1
- gmp 5.1.2
- mpfr 3.1.1p2
- mpc 1.0.1
- cloog-ppl 0.15.11
- cloog 0.18.0
- isl 0.11.2
- ppl 012.1
They can be recognized by the sparc64-tgcware64 suffix and will install to /usr/tgcware64.
The 64bit packages can be installed in parallel with the regular tgcware packages.