https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79341
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Ah, that might explain this, I've been using glibc 2.25 prerelease during testing. The glibc change has been a fix for https://sourceware.org/bugzilla/show_bug.cgi?id=16214 I don't know the s390{,x} TLS good enough to judge whether this is something fixable in libsanitizer (if acceptable for upstream, then for compiler-rt, if not, as gcc local patch), or whether we just should in configure.tgt say UNSUPPORTED for glibc 2.19 (or whatever is the oldest glibc that works with it). I can help with the configure.tgt check if we decide to go that way, provided we know the minimum glibc version.
