Comment by JonChesterfield

I basically agree with the flags the linux kernel are using. Those that I'm missing are probably mistakes on my part. The iso standard isn't of much use to me but the language implemented by compilers with various flags certainly is.

Specifically calling out 99 as the one before 11 introduced _Generic where it could have been overloadable, and atomic where it should have been the gcc intrinsics. That feels like a tipping point between making the language better and diverging from reality.

The op actually references an implementation (QAC? presumably a C compiler) which is nice. The current ISO language would have been improved if "has been implemented and some people use it" was a requirement on adding things to the language. I cannot believe anyone programmed with _Generic and thought yeah, this is what I want.