Gentoo's Bugzilla –
Attachment 309307 Details for
Bug 412397sys-libs/glibc-2.15[glibc-omitfp] with gcc-4.7.0 - ../locale/programs/charmap.c: In function ‘charmap_read’: ../sysdeps/i386/i486/bits/string.h:760:3: error: can’t find a register in class ‘GENERAL_REGS’ while reloading ‘asm’