__STDC_NO_THREADS__ is not defined in Haiku

[Begasus]

When trying to build scipy I getting an error that the script wants to include "threads.h". This however isn't availabe in Haiku and the check for that is due to __STDC_NO_THREADS__ not being defined.

The source of the issue is with numpy. See a PR at ​https://github.com/numpy/numpy/pull/18180

__STDC_VERSION__ = 201710
__STDC_NO_THREADS__ not defined
__GLIBC__ not defined

[korli]

__STDC_NO_THREADS__ is theorically set by the compiler, based on its knowledge of the C library. Practically gcc seems to include the header stdc-prereqs.h, which would eventually define such a macro.

[Begasus]

Yeah, came across that also earlier, looked for that header but we don't include it in Haiku atm

[korli]

I added a stdc-prereqs.h with ​https://review.haiku-os.org/c/haiku/+/4097 When it's accepted, GCC and Clang can be adjusted.

[Begasus]

This has been accepted, I should check if it has been resolved, but I'm not sure if it also applied to R1B2?

[pulkomandy]

It has been applied to nightlies, but not to the stable beta2 branch.

[Begasus]

I think this could be closed, header is included in R1B3, building scipy without the patch for numpy seems to work (checked on x86_gcc2)

[Begasus]

Ok, no problem reported by numpy, but scipy still fails to find it, so I'm guessing that clang/gcc aren't adjusted to use it, so best to leave it open until then