[PATCH] D23719: [libc++] Use C11 for atomics check

[Shoaib Meenai via cfe-commits]

smeenai added a comment.

@bcraig: `__STDC_NO_ATOMICS__` wouldn't be defined for pre-C11 compilers either, right?

>From what I understand of the original code sample, one of the purposes was to check for 64-bit atomic support on 32-bit systems (hence the use of `uintmax_t` and the check for `__atomic_fetch_add_8`). I don't really know of a portable way of accomplishing that without at least including `<stdint.h>`.


https://reviews.llvm.org/D23719