https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286342
--- Comment #10 from Mark Millard <marklmi26-f...@yahoo.com> --- (In reply to Jordan Gordeev from comment #9) I do not know if FreeBSD or libc++ target more than clang++ and g++ versions for compatibility. __has_feature(x) is not from the language standard, any version) but g++ has explicitly added support for clang++ compatibility. https://clang.llvm.org/docs/LanguageExtensions.html#has-feature-and-has-extension documents a usage technique via the text: #ifndef __has_feature // Optional of course. #define __has_feature(x) 0 // Compatibility with non-clang compilers. #endif #ifndef __has_extension #define __has_extension __has_feature // Compatibility with pre-3.0 compilers. #endif ... #if __has_feature(cxx_rvalue_references) // This code will only be compiled with the -std=c++11 and -std=gnu++11 // options, because rvalue references are only standardized in C++11. #endif #if __has_extension(cxx_rvalue_references) // This code will be compiled with the -std=c++11, -std=gnu++11, -std=c++98 // and -std=gnu++98 options, because rvalue references are supported as a // language extension in C++98. #endif -- You are receiving this mail because: You are the assignee for the bug.
