Hi Helmut!
On Thu, Feb 07, 2019 at 06:19:16AM +0100, Helmut Grohne wrote:
> I've seen packages that call lrelease directly from debian/rules. I'm
> not sure how you use lrelease without qmake though. When qmake is
> missing, lrelease prints
>
> WARNING: Could not find qmake configuration file linux-g++.
> lrelease error: cannot process project file '$PROJECT.pro'.
>
> and exits successfully without having done the work it was tasked to do.
> Given that it fails silently (in violation of policy 4.6), I cannot
> easily detect them.
>
> So I agree that you can run lrelease outside qmake, but that doesn't
> mean that it actually works or does anything useful in the absence of
> qmake.
Thanks for the explanation! Now I remember that lrelease has two modes.
Quoting from its manpage:
SYNOPSIS
lrelease [ options ] project-file
lrelease [ options ] ts-files [ -qm qm-file ]
When you call it with a project file (*.pro), it really needs qmake to
process that file (in Qt 5.11).
However, in the upcoming Qt 5.13 release, the first mode of lrelease is
deprecated [1] and the new tool lrelease-pro is introduced.
So if we want a future-proof solution, only packages that are using
lrelease-pro or ‘lrelease *.pro’ or ‘lrelease -project *.pro’ should have
a build-dependency on qt5-qmake:native. Packages which are using
‘lrelease *.ts’ do not need qmake.
Maybe when we package Qt 5.13, I can split lrelease-pro into a separate
package that will depend on qt5-qmake.
[1]: https://codereview.qt-project.org/234756
> > Do you have a list of packages where adding qt5-qmake:native will actually
> > make them cross-buildable?
>
> #889752 #896699 #901212 #920850
Thanks for the references! There are not many of them, and only one is open,
so maybe we can delay this bug until Bullseye (when we package Qt 5.13)?
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