[Bug other/55899] GCC should provide built-ins in <stdint.h> data types flavor/version/variation

[yann at droneaud dot fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55899

Yann Droneaud <yann at droneaud dot fr> changed:

           What    |Removed                     |Added
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                 CC|                            |yann at droneaud dot fr

--- Comment #2 from Yann Droneaud <yann at droneaud dot fr> ---
I stumbled upon this issue again when dealing with uint64_t as sometimes it's
defined as unsigned long, sometimes it's defined as unsigned long long
depending on the ABI. Having __builtin_ffs64(), __builtin_clz64(),
__builtin_ctz64(), etc. would ease me making my code portable to unpleasant ABI
such as Microsoft Windows ones without having to use GCC's
__builtin_types_compatible_p() (which is not supported when compiling C++), or
C11 _Generic() ...