Qt6 private headers not found

kwalsh

We're using Yocto and attempting to backport GStreamer 1.24.0 (scarthgap), but the build fails during the gst-plugins-good recipe.

The error is shown below, this is true for all private headers (e.g. QtCore/private, QtGui/private, etc.)

../git/ext/qt6/gstqsg6material.cc:32:10: fatal error: 'QtGui/private/qrhi_p.h' file not found
| #include <QtGui/private/qrhi_p.h>
|          ^~~~~~~~~~~~~~~~~~~~~~~~
| 1 error generated.

The compile statement of interest is the below,

-I/.../gstreamer1.0-plugins-good/1.24.0.imx-r0/recipe-sysroot/usr/include/QtGui

But the private header files are actually at,

.../gstreamer1.0-plugins-good/1.24.0.imx-r0/recipe-sysroot/usr/include/QtGui/6.5.1/QtGui/private/qrhi_p.h

Setup

Qt Version: 6.5.1
Yocto Layer: meta-qt6
Yocto Version: kirkstone

I was noticing from meta-qt6/conf/layer.conf that LAYERSERIES_COMPAT_qt6-layer only included scarthgap in Qt6.6.3 and higher, perhaps that is our issue still only being on 6.5.1?

Any advice would be much appreciated, thanks!