https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108225
--- Comment #19 from cqwrteur <unlvsur at live dot com> --- (In reply to cqwrteur from comment #18) > (In reply to cqwrteur from comment #17) > > (In reply to Eric Botcazou from comment #16) > > > > #if _WIN32_WINNT >= 0x0600 > > > > #define __GTHREAD_HAS_COND 1 > > > > #define __GTHREADS_CXX0X 1 > > > > #endif > > > > > > > > I suggest remove this macro in the header due to potential breakage > > > > > > > > #if _WIN32_WINNT >= 0x0600 > > > > #endif > > > > > > That's nonsensical. > > > > The problem is that libstdc++ would instantly break if someone randomly > > defines _WIN32_WINNT (like gdb does). > > The solution would probably be for libstdc++ to guard against > __GHTREAD_HAS_COND instead https://sourceware.org/bugzilla/show_bug.cgi?id=29966