Mixxx 2.4 AArch64 flatpak builds fail since PR #12664

[djantti]

Bug Description

Hi all! Mixxx 2.4 flatpak builds currently do not succeed on AArch64. On x86_64 everything builds just fine. The problem appeared with Mixxx PR #12664 from a couple of weeks ago and reverting the PR makes AArch64 flatpak builds work again.

The compilation fails with errors like this:

In file included from /run/build/mixxx/src/waveform/renderers/glwaveformrenderersignal.h:3,
                 from /run/build/mixxx/src/waveform/renderers/glvsynctestrenderer.h:3,
                 from /run/build/mixxx/src/waveform/renderers/glvsynctestrenderer.cpp:1:
/run/build/mixxx/src/waveform/renderers/glwaveformrenderer.h:7:59: error: expected class-name before ‘{’ token
    7 | class GLWaveformRenderer : protected QOpenGLFunctions_2_1 {
      |                                                           ^
/run/build/mixxx/src/waveform/renderers/glwaveformrenderer.h: In member function ‘virtual void GLWaveformRenderer::initializeGL()’:
/run/build/mixxx/src/waveform/renderers/glwaveformrenderer.h:10:9: error: ‘initializeOpenGLFunctions’ was not declared in this scope
   10 |         initializeOpenGLFunctions();
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~

This might be related to the fact that Flathub AArch64 org.kde.SDK is built using OpenGL ES2 for Qt Base (-opengl es2), but that's how far the investigation has progressed. Here's a link to the Flathub buildbot log and I've also attached a build log from my local AArch64 build.

https://buildbot.flathub.org/#/builders/9/builds/9015/steps/7/logs/stdio
mixxx_flatpak_aarch64_build.txt

Version

2.4.0

OS

Fedora 39

[daschuer]

Pleas check if #12804 fixes the build.

[Be-ing]

Fixed by #12804, though that doesn't mean #12803 shouldn't be considered too.