qt5, libsForQt5: 5.14 -> 5.15 on darwin

[willcohen]

Description of changes

Per https://github.com/NixOS/nixpkgs/pull/168524/files#r934306285, qt515 is ready to become the default on macos. I don't have an x86 mac anymore, so I can't test personally.

@veprbl @jiegec

Things done

Bumped qt514 to qt515.

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 22.11 Release Notes (or backporting 22.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[willcohen]

This doesn't appear quite ready for merge. At the very least, my attempt to build qt5 on aarch64 is failing with qtspeech. @jiegec

[veprbl]

The Qt 5.14 was always ready but not fully ready for x86_64-darwin. The qt514.qtwebengine requires some Metal extensions that are hard to patch out for 10.12 SDK.

[willcohen]

Of course -- sorry, haven't had my coffee yet. Right, and put more literally for the purpose of this PR, qt514 fails to build on darwin too, for the reasons mentioned above.

Can any x86 users put this through its paces? @NixOS/darwin-maintainers. As noted above, I've moved on to the land of apple silicon, so I can't test this where it counts.

[prusnak]

The reason why qt5 was kept at qt5.12 on darwin was that qt5.qtwebengine is broken on x86_64-darwin for qt5.14+ as per

nixpkgs/pkgs/development/libraries/qt-5/modules/qtwebengine.nix

Lines 261 to 265 in a6cb63c

	# we are still stuck with MacOS SDK 10.12 on x86_64-darwin
	# and qtwebengine 5.14+ requires at least SDK 10.14
	# (qtwebengine 5.12 is fine with SDK 10.12)
	# on aarch64-darwin we are already at MacOS SDK 11.0
	broken = stdenv.isDarwin && stdenv.isx86_64 && (lib.versionAtLeast qtCompatVersion "5.14");

Since it seems qt5 was bumped to qt5.14, the default qt5.qtwebengine is already broken on x86_64-darwin and therefore we don't lose anything by bumping to qt5.15 (where qtwebengine is broken too).

[veprbl]

Please make sure this works in runtime: #185615

[willcohen]

@veprbl if the last bump caused a regression a revert is absolutely the right move, and I’ll move this to draft. Sorry for the mixup.

[tanshihaj]

@willcohen @veprbl according reports in #185615 issue affects Qt 5.14, but not Qt 5.15 So maybe bumping to 5.15 will fix it?