[Buildroot] [git commit] qt5wayland: fix build issue with mesa3d w/out xcb

[Thomas Petazzoni <thomas.petazzoni@bootlin.com>]

Hello,

On Tue, 27 Feb 2018 21:48:17 +0100, Peter Korsgaard wrote:

> +# The mesa's EGL/eglplatform.h header includes X11 headers unless the flag
> +# MESA_EGL_NO_X11_HEADERS is defined. Tell to not include X11 headers if
> +# the libxcb is not selected.
> +ifeq ($(BR2_PACKAGE_MESA3D_OPENGL_EGL)x$(BR2_PACKAGE_LIBXCB),yx)
> +QT5WAYLAND_QMAKEFLAGS += QMAKE_CXXFLAGS+=-DMESA_EGL_NO_X11_HEADERS
> +endif

I should have replied to the patch, but: I'm not happy with this
change. Indeed this -D flag should be part of mesa's pkg-config files,
and be picked up by Qt.

The simple fact that this identical fix had to be added to qt5wayland,
qt5webkit and qt5multimedia is a good indication that the fix is not
the appropriate one. We may have to replicate this fix to lots of other
qt5 packages.

So the right fix is to propagate the flag using pkg-config.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
http://bootlin.com