https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108630
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #5) > LTO will almost certainly break src/c++98/globals_io.cc so I don'tthink we > can support building libstdc++ with LTO for now. And would probably break the fake dependency we create in std::thread creation, where we pass &pthread_create to an extern function inside the library, which doesn't use it. With LTO the fact it's unused would be visible, and the link-time dependency would be removed.
