https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68176
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Note, while I don't have eglibc, I've hacked my /usr/include/stdc-predef.h to #include <bits/predef.h> and added that header, without the patch I see many FAILs with make check-gcc RUNTESTFLAGS=pch.exp, with the patch none. Will bootstrap/regtest it now.
