Closed issue by lemmi on void-packages repository

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

Description:
Opening this issue to document the error when cross compiling darktable for aarch64:
```
/builddir/darktable-3.0.1/src/common/bilateral.c:332:6: warning: GCC does not currently support mixed size types for 'simd' functions
  332 | void dt_bilateral_slice_to_output(const dt_bilateral_t *const b, const float *const in, float *out,
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/builddir/darktable-3.0.1/src/common/bilateral.c:276:6: warning: GCC does not currently support mixed size types for 'simd' functions
  276 | void dt_bilateral_slice(const dt_bilateral_t *const b, const float *const in, float *out, const float detail)
      |      ^~~~~~~~~~~~~~~~~~
/tmp/cc0eANtK.s: Assembler messages:
/tmp/cc0eANtK.s:3724: Error: unknown pseudo-op: `.variant_pcs'
/tmp/cc0eANtK.s:3861: Error: unknown pseudo-op: `.variant_pcs'
/tmp/cc0eANtK.s:3986: Error: unknown pseudo-op: `.variant_pcs'
/tmp/cc0eANtK.s:4164: Error: unknown pseudo-op: `.variant_pcs'
make[2]: *** [src/CMakeFiles/lib_darktable.dir/build.make:136: src/CMakeFiles/lib_darktable.dir/common/bilateral.c.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [CMakeFiles/Makefile2:1829: src/CMakeFiles/lib_darktable.dir/all] Error 2
make: *** [Makefile:172: all] Error 2
```