https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123908
--- Comment #7 from LIU Hao <lh_mouse at 126 dot com> --- Can you verify that these macros are correctly defined when compiling libstdc++-v3/src/c++11/mutex.cc? These should be defined as long as the correct bits/os_defines.h is included, but it doesn't seem the case. diff --git a/libstdc++-v3/src/c++11/mutex.cc b/libstdc++-v3/src/c++11/mutex.cc index 8f04494620be..a56019be92d2 100644 --- a/libstdc++-v3/src/c++11/mutex.cc +++ b/libstdc++-v3/src/c++11/mutex.cc @@ -24,6 +24,18 @@ #include <mutex> +#if !defined _GLIBCXX_HAS_GTHREADS +#error _GLIBCXX_HAS_GTHREADS expected +#endif + +#if !defined _GLIBCXX_HAVE_TLS +#error _GLIBCXX_HAVE_TLS expected +#endif + +#if !defined _GLIBCXX_NO_EXTERN_THREAD_LOCAL +#error _GLIBCXX_NO_EXTERN_THREAD_LOCAL expected +#endif + #ifdef _GLIBCXX_HAS_GTHREADS namespace std _GLIBCXX_VISIBILITY(default)
