https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60512
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> --- But why is that better than GCC's alternative, just defining macros like __SANITIZE_ADDRESS__ and __SANITIZE_THREAD__? Libstdc++ does this: // Macro indicating that TSAN is in use. #if __SANITIZE_THREAD__ # define _GLIBCXX_TSAN 1 #elif defined __has_feature # if __has_feature(thread_sanitizer) # define _GLIBCXX_TSAN 1 # endif #endif ISTM that it would be simpler if clang defined those macros too, because checking for both __has_feature and then using __has_feature takes more work than just checking a macro. There's currently no macro for UBsan AFAIK, but one could be added.
