Si vous rencontrez une erreure lors de la compilation de glibc en architecture amd64 et que ça vous affiche ce message d’erreur :

* ERROR: sys-libs/glibc-2.6.1 failed.* Call stack:*            ebuild.sh, line 1701:  Called dyn_compile*            ebuild.sh, line 1039:  Called qa_call 'src_compile'*            ebuild.sh, line   44:  Called src_compile*   glibc-2.6.1.ebuild, line  155:  Called eblit-run 'src_compile'*   glibc-2.6.1.ebuild, line  150:  Called eblit-glibc-src_compile*    src_compile.eblit, line  168:  Called src_compile*   glibc-2.6.1.ebuild, line  155:  Called eblit-run 'src_compile'*   glibc-2.6.1.ebuild, line  150:  Called eblit-glibc-src_compile*    src_compile.eblit, line  179:  Called toolchain-glibc_src_compile*    src_compile.eblit, line  122:  Called die* The specific snippet of code:*              make PARALLELMFLAGS="${MAKEOPTS}" || die "make for ${ABI} failed"*  The die message:*   make for amd64 failed** If you need support, post the topmost build error, and the call stack if relevant.* A complete build log is located at '/var/tmp/portage/sys-libs/glibc-2.6.1/temp/build.lo

la solution est toute simple :

emerge -C sys-devel/gcc-configemerge --resume -avDNu world

Et le tour est joué