https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66687
--- Comment #3 from Guido Haztsis <guido.hatzsis at yandex dot com> --- Musl claims that they support LTO. Also all that I have changed was bumping gcc from the 5.1_release tag to the latest overnight commit. The res file doesn't even include libc.so (nor libc.a for a static build) which is strange and musl has long claimed to support lto without fat objects. (In reply to Andrew Pinski from comment #2) > Are you sure that this is not a bug in musl?