There is a bug in the glibc-2.2.5 when compiled with gcc-3.1 on a sparc platform (sorry, for selecting "All" on Platform, but i only see "All and PC"). I used a SparcStation 10, but i don't know if it is reproducable on UltraSparc's. When emerging without the Patch, the compilation of the glibc dies with a "Error: illegal instruction".
Created attachment 2528 [details] new ebuild file for glibc
Created attachment 2529 [details] patch for glibc on sparc
Glibc ebuilds have been updated. Fix allows compilation of glibc by both 2.95.3 and gcc 3.2pre2.