Good news overall.
I can build Trinity on Slackware 13.1 (gcc 4.4.4) and 13.37 (gcc 4.5.2), both 32-bit and 64-bit. I build everything but a few packages. There are nominal build issues I work around, but I can build full packages for most modules. Exceptions:
* tqca, tqca-tls won't build with 64-bit (can't find $PREFIX/lib64) * python-tqt, python-trinity won't build with 64-bit (can't find $PREFIX/lib64) * tdeadmin (won't build knetworkconf) * kstreamripper FTBFS
With that foundation I now can start testing against Slackware Current, which is the testing branch for the next official Slackware release. Slackware Current contains gcc 4.7.
Darrell