https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91938
--- Comment #2 from nsz at gcc dot gnu.org --- if you really want this optimization then libgomp has to do checks to guarantee that the target libc supports this usage and only enable it when it's 100% safe. (e.g. musl or bionic does not support this, my guess is nothing really supports this other than glibc and even glibc has trouble because users abuse it) i don't believe the unacceptable performance claims, since with tlsdesc there should be only a small performance difference between initial-exec tls vs general tls access, so instead of building broken binaries with initial-exec tls-model may be the tls-dialect should be changed to tlsdesc (when supported).
