[Qt6Base] switch to using require_macos_sdk

[fingolfin]

Should be merged with [skip ci].

It may be that some of the macOS specific things will have to be added back (e.g. I have no idea why it was setting custom LDFLAGS and OBJCFLAGS). My idea here was to remove everything, then add things back as needed, but this time perhaps with a comment or two indicating the reason.

@barch Please let me know uf you have any explanations or additional thoughts on this!

[fingolfin]

Huh, now getting this:

ERROR: LoadError: version 16.0.6 of package LLVM_full_jll is not available. Available versions: 8.0.1+0, 8.0.1+1, 8.0.1+2, 8.0.1+3, 9.0.1+0, 9.0.1+1, 9.0.1+2, 9.0.1+3, 9.0.1+4, 9.0.1+5, 9.0.1+6, 9.0.1+7, 9.0.1+8, 10.0.0+0, 10.0.0+1, 10.0.1+0, 10.0.1+1, 10.0.1+2, 11.0.0-rc5+0, 11.0.0-rc5+1, 11.0.0-rc6+2, 11.0.0+3, 11.0.0+4, 11.0.0+5, 11.0.0+6, 11.0.0+7, 11.0.0+8, 11.0.0+9, 11.0.0+10, 11.0.1+0, 11.0.1+1, 11.0.1+2, 11.0.1+3, 11.0.1+4, 12.0.0+0, 12.0.0+1, 12.0.1+0, 12.0.1+1, 12.0.1+2, 12.0.1+3, 12.0.1+4, 13.0.0+0, 13.0.0+1, 13.0.0+2, 13.0.0+3, 13.0.1+0, 13.0.1+1, 13.0.1+2, 13.0.1+3, 14.0.2+0, 14.0.2+1, 14.0.5+0, 14.0.5+1, 14.0.5+2, 14.0.5+3, 14.0.6+0, 14.0.6+1, 14.0.6+2, 14.0.6+3, 14.0.6+4, 15.0.7+0, 15.0.7+1, 15.0.7+2, 15.0.7+3, 15.0.7+4, 15.0.7+5, 15.0.7+6, 15.0.7+7, 15.0.7+8, 15.0.7+9, 15.0.7+10, 16.0.6+0, 16.0.6+1, 16.0.6+2, 16.0.6+3, 16.0.6+4, 16.0.6+5, 16.0.6+6, 17.0.6+0, 17.0.6+1, 17.0.6+2, 17.0.6+3, 17.0.6+4, 17.0.6+5, 18.1.7+0, 18.1.7+1, 18.1.7+2, 18.1.7+3, 18.1.7+4, 18.1.7+5, 19.1.1+0, 19.1.1+1, 19.1.1+2, 19.1.7+0, 19.1.7+1, 19.1.7+2, 20.1.2+0, 20.1.2+1, 20.1.2+2, 20.1.2+3, 20.1.8+0, 21.1.2+0

Which it didn't show the last it was built. I note that 16.0.6+0 up to 16.0.6+6 are in that list.... I'd not expect this failure, though, the + should not matter for the version selection here:

BuildDependency(PackageSpec(name="LLVM_full_jll", version=qt_llvm_version)),

Now I wonder: perhaps in between we did the update to Julia 1.12 ?

@giordano ?

[giordano]

Packagespec needs a string instead of a version number

[barche]

Sorry, I don't really remember the specifics, it took a lot of tweaking to get this to compile on all platforms. I'd have to do the same as you are doing now, remove things and add back as needed.

[fingolfin]

@barche no worries. It compiles on all platforms (well, it did, last I tried), except for macOS -- no surprise since the main change here is to how it uses the macOS SDK.

But anyway, it seems I now got it to build on ARM, and the x86 failure was "just" a timeout.

[fingolfin]

@barche this should be ready know (well, let's see if the rest of the CI passes, but the macOS ones do).

But there is no need to rebuild the JLLs, so it would be fine to merge this with [skip ci]. I mainly wanted to have this in place so that it is safe to update some of the other Qt6 recipes.