https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96217
--- Comment #2 from LE GARREC Vincent <legarrec.vincent at gmail dot com> --- Are you sure ? I thought it the fault of GCC because : - glibc can be build if gcc was built with -O2 - glibc can't be build if gcc was built with -O0 I think the build of glibc should not depend on the CFLAGS of GCC.