https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115453
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Also it is not just old glibc but most non-"modern" libc out there (e.g. Solaris I think). So maybe don't reference glibc in the comments in configure.ac either. Just say some libc.
