Re: [PATCH] msvcrt: Provide pow2 implementation in static library for msvcrt versions that don't provide it.

[Alexandre Julliard]

Jacek Caban  writes:
> Signed-off-by: Jacek Caban
>
> This is needed because compiler may optimize pow(2,x) to exp2(x) and
> clang does that in out msvcp code. This also needs -fno-builtin
> because otherwise clang will optimize our forwarding implementation
> back to exp2.

If -fno-builtin works to prevent this, then why doesn't it already
prevent it from happening in msvcp?