Re: fixing AC_OPENMP for Apple clang

* Dima Pasechnik:

> I think this is an overwhelming evidence in favour of Autoconf
> supporting this feature, documented, or not, by the upstream (i.e. Apple).
> The community knows how to use it, and uses it, there is no need to be
> patronising here. By not supporting it Autotools shoot themselves in the
> foot, forcing users/developers of multi-platform OpenMP-using applications
> to look elsewhere for a build system supporting this
> feature out of the box.
> As I said, Meson supports it out of the box. Cmake supports it too.

Okay, then it's a bit weird that it's not mentioned at all in the Apple
documentation.

I don't have a strong opinion here (it's not my toolchain after all).

Thanks,
Florian