[Qt6Base] Targets build for v6.3.5

[barche]

CC @simonbyrne

[barche]

I just realized that the host-then-target build sequence temporarily breaks GR in minor point upgrades like this, since QtBase 6.5.3 is already in the registry but only for x64 MUSL.

[barche]

Windows is failing because CMake can't find OpenSSL, I have no immediate idea on how to fix this, maybe someone else encountered this before using OpenSSL 3? CC @giordano

[barche]

Removing -openssl-linked on mingw is the only thing I can think of right now. For context, see: https://doc.qt.io/qt-6/ssl.html#enabling-and-disabling-ssl-support-when-building-qt-from-source

I think this should still pick up our openssl at runtime, and if not and someone complains (I don't think anyone is actually using the SSL-dependent Qt classes from within Julia) we can try to find a better fix.

[barche]

Feel free to merge if this builds and if you approve @giordano

[giordano]

Import libraries of openssl on x86_64 win are in ${prefix}/lib64 instead of ${prefix}/lib, but setting LDFLAGS like in

Yggdrasil/C/CyrusSASL/build_tarballs.jl

Lines 46 to 49 in b524ac3

	if [[ "${target}" == x86_64-* ]]; then
	# On x86_64 mingw32 the import libraries of OpenSSL are in `lib64/`.
	export LDFLAGS="-L${prefix}/lib64"
	fi

doesn't seem to help here. I don't think I'll have much time to debug this, also because Qt build system is incredibly messed up and I'm not familiar with it, but in general we should have a better way to deal with this upgrades. Why not doing the native build in all builds? It's wasteful, but at least we don't have the problem of having broken packages between updates.

[giordano]

Also, why don't we hit ccache here? Rebuilds with what should be warm cache take way too long.

[giordano]

Yggdrasil/Q/Qt6Base/build_tarballs.jl

Line 181 in bca4972

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

what is LLVM needed for?

[giordano]

I found #2856 (comment) but I don't think we should use LLVM_full_jll, but rather the compiler-rt stuff. Also, that'd be macos-only, it isn't needed on all platforms.

[barche]

Continuing discussion in PR #7629