-current and new fglrx-libGL.so
 

Just a heads-up for those using fglrx-12.104 (aka catalyst-13.4) or fglrx-beta on -current: make sure your /usr/lib{,64}/libGL.so.1.2.0 is the fglrx version, not the one from mesa. You can check this via fglrxinfo and see if you get warnings about swrast not loading.

I think the ATI SlackBuild needs updating, but for the meanwhile, you can move the mesa libGL.so.1.2.0 to FGL.renamed.libGL.so.1.2.0 and make a symlink to fglrx/fglrx-libGL.so.1.2 as libGL.so.1.2.0.