Re: darktable>=3.0.x: build fails for aarch64* with openmp

[lemmi <lemmi@users.noreply.github.com>]

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New comment by lemmi on void-packages repository

https://github.com/void-linux/void-packages/issues/21105#issuecomment-1229132479

Comment:
So this made me have another look, whether I couldn't find a solution upstream. Seems like the flag is also necessary on macos, but they also add [`-DBUILD_SSE2_CODEPATHS=OFF`](https://github.com/macports/macports-ports/blob/2f8fe26bae7c95d4c9bb1c0b1eae2f8c8e6161f7/graphics/darktable-devel/Portfile#L139).
That made me try to replace `-DUSE_OPENMP=OFF` with that:
```diff
diff --git a/srcpkgs/darktable/template b/srcpkgs/darktable/template
index 9d0ba9ba70..58fd4fd818 100644
--- a/srcpkgs/darktable/template
+++ b/srcpkgs/darktable/template
@@ -40,6 +40,6 @@ fi

 case $XBPS_TARGET_MACHINE in
        aarch64*)
-               configure_args+=" -DUSE_OPENMP=OFF"
+               configure_args+=" -DBUILD_SSE2_CODEPATHS=OFF"
                ;;
 esac
```
Maybe someone can try whether this produces a working binary?

Regardless, without `-DUSE_OPENMP=OFF` I still get
```
/builddir/darktable-4.0.0/src/common/iop_profile.h:286:20: warning: GCC does not currently support mixed size types for 'simd' functions
  286 | static inline void dt_ioppr_rgb_matrix_to_xyz(const dt_aligned_pixel_t rgb, dt_aligned_pixel_t xyz,
      |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~
```
But these issues are now warnings (at least with `darktable-4.0`), not errors anymore and `darktable` compiles.