Upgrade GCC to 9.3 to fix bug affecting Darktable
Darktable fails to build on aarch64 and armv7 due to a bug in GCC. This bug has been fixed in 9.3.
Error:
/builds/kdaudt/aports/community/darktable/src/darktable-2.6.3/src/iop/highlights.c:700:17: error: '*.LC2' not specified in enclosing 'parallel'
700 | float RGBmax[3] = { -FLT_MAX, -FLT_MAX, -FLT_MAX };
| ^~~~~~
/builds/kdaudt/aports/community/darktable/src/darktable-2.6.3/src/iop/highlights.c:630:9: error: enclosing 'parallel'
630 | #pragma omp parallel for default(none) \
| ^~~