https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69699
--- Comment #3 from bastian.beisc...@rwth-aachen.de --- Jonathan, maybe so but it should be mentioned on the page nevertheless, right? My issue is that we are using (as an example): #if (defined(__GLIBCXX__) && __GLIBCXX__ > 20150626) || (defined(_LIBCPP_VERSION) && _LIBCPP_VERSION >= 1101) static_assert(std::is_trivially_constructible<MyClass>::value, "MyClass should be trivially constructible."); #endif since "std_is_trivially_constructible" exists only in libstdc++ shipped with GCC 5.1.0+, but not in libstdc++ shipped with GCC 4.9.3, for example. If i understand your comment correctly you are saying that, if GCC 4.9.4 were released, it would include a version of libstdc++ with __GLIBCXX__ > today, so it would pass the above check, but still there would't be any "std_is_trivially_constructible". But how else can I do the check then?! Using __GNUC__ / __GNUC_MINOR__ is not going to work because we have people using other compilers (clang, Intel compiler) which use libstdc++ shipped with GCC but do not define __GNUC__ / __GNUC_MINOR__.
