glibc 3.3.5 supports a different model for accessing TLS memory when compiled with the -mno-tls-direct-seg-refs CFLAG (gcc 3.4.4) (glibc Makefiles check for that flag and add defines for it, changing some of the ASM code) however, the "strip-flags" call in the glibc ebuild removes that flag, so this feature of glibc is lost. This feature would however be important to Xen users. (getting good performance for NPTL under Xen) Simply adding that option into flag-o-matic.eclass solved the problem for me, but a more "permanent" solution would be nice, maybe with an additional USE flag for glibc enabling that option. Reproducible: Always Steps to Reproduce:
USE flag is kind of pointless overkill added to flag-o-matic as an ABI flag
