在 2021-08-31 17:02, Jonathan Wakely 写道: > It looks like my questions about this patch never got an answer, and > it never got applied. > > Could somebody say whether TLS is enabled for native *-*-mingw* > builds? If it is, then we definitely need to add GCC_CHECK_TLS to the > cross-compiler config too. > > For a linux-hosted x86_64-w64-mingw32 cross compiler I see TLS is not enabled: > > /* Define to 1 if the target supports thread-local storage. */ > /* #undef _GLIBCXX_HAVE_TLS */ >
I have been disabling it with `--disable-tls` for years, but... I couldn't remember why. Thread-local storage is implemented with emutls, no matter with or without this option. Does 'thread-local storage' mean to access thread-local objects via the FS or GS register on x86? If so, then it is definitely not supported yet. -- Best regards, LIU Hao
