> I'd say the main issue is that libatomic is not guaranteed to work like that.
> Today it relies on IFUNC for redirection, so you may (and not "will") get the > desired behavior on Glibc (implying Linux), not on other OSes, and neither on > Linux with non-GNU libc (nor on bare metal, for that matter). I think, in case if IFUNC is not available (i.e., outside glibc), redirection is still possible by introducing a regular function pointer there. Yes, it is an extra cost but better than nothing (+ consistent behavior on all platforms), probably will not add too much anyway because there is already a performance hit by going to libatomic.
