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Re: [bug#39229] qt-build-system: Add QT_QPA_PLATFORM=offscreen?

From: Mike Rosset
Subject: Re: [bug#39229] qt-build-system: Add QT_QPA_PLATFORM=offscreen?
Date: Wed, 22 Jan 2020 01:20:04 -0800
User-agent: mu4e 1.2.0; emacs 26.3

Hartmut Goebel writes:

> Hi Danny,
> (forwarding to guix-devel to eventually get more opinions on this)
> Am 21.01.20 um 23:43 schrieb Danny Milosavljevic:
>>> +         (add-before 'check 'check-setup
>>> +           (lambda _
>>> +             (setenv "QT_QPA_PLATFORM" "offscreen")
>>> +             #t)))))
>> Hmm, would it make sense to do that automatically in qt-build-system ?
> I would be fine with this, since I find myself adding this snippet quite
> often when building Qt/KDE applications. But there *might* be cases,
> where tests fail due to this setting. (While I'm not aware of one, I
> could imaging some test checks whether it is actually painting.)
> Thus I propose implementing this in some way to easily disable it if
> required: Either
> - by adding this a new phase (as in the snippet shown above), so it can
> easily be disabled
> - by adding another keyword-argument (proposal: `#:qpa-platform`,
> default: "offscreen", if +f, will not be set.

I think adding this to qt-build-system with the keywords is a good



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