On 28 May 2015 at 18:22, Martin Sebor wrote: > [*] The Feature Testing Recommendations For C++ proposal (N4440 > being the latest I could find) tries to alleviate it by providing > test macros for individual features. I know Clang implements parts > of it but don't know what its status is in GCC. > http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4440.html 4.9 and above define those macros.