Comment by quietbritishjim
1 year ago
> C99 fno-strict-aliasing
I'm confused. C99 is a standard of C, while fno-strict-aliasing is a non standard compiler switch for a specific implementation. Did you mean to put those two things next to each other? Especially since that switch appears to mean "violate the standard in a specific way", and that thing to violate (strict aliasing) goes back at least at far back at the original C89 standard.
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.