https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108210
--- Comment #8 from niXman <i.nixman at autistici dot org> --- (In reply to Jonathan Wakely from comment #7) > Probably a dup of PR 108225 i.e. expecting --enable-threads=win32 to provide > std::mutex without _WIN32_WINNT >= 0x0600 yep, sure! > But it isn't provided, because the win32 model doesn't support C++11 > threading for ancient versions: > > /* Condition variables are supported on Vista and Server 2008 or later. */ right. it's strange that the same person posted the same issue twice on two diff BR...