Bug#1119091: qt6-tools: build with default clang/llvm

[Jeremy Bícha <jbicha@debian.org>]

Control: retitle -1 qt6-tools: build with llvm 21
Control: tags -1 -patch

On Tue, Oct 28, 2025 at 5:29 PM Patrick Franz <deltaone@debian.org> wrote:
> I have no intention of using the default llvm and the reason why we
> hardcode the llvm version is because we have to patch it all the time
> otherwise, exactly what you are pointing out.

As long as upstream keeps up with Debian, it's ok. But I've changed
the title of this bug since you'll eventually need to build with llvm
21. llvm-toolchain-21 hasn't yet reached Testing, so I admit there's
no urgency here.

> You cannot just upgrade qt6-tools to 6.9.3 - you have to update _all_
> Qt 6 packages...and that is a lot of work for a patch update. Not to
> mention that we have to do a big transition for Qt patch updates.
> Packaging 6.10 is a couple of months away.

Ok, I pointed out in a later comment that specific commits could be
cherry-picked instead.

Thank you,
Jeremy Bícha