https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64635
--- Comment #12 from howarth at bromo dot med.uc.edu --- (In reply to Dominique d'Humieres from comment #11) I tried another bootstrap with the addition of --enable-lto (most of the buildbots seem to just use the lto language for that) and it had no impact on my test results. I guess this variation reflects some obscure difference between bootstrapping from the FSF gcc compilers and the system clang compilers.