[Buildroot] [PATCH v1 1/3] qt5webkit: fix build issue with mesa3d w/out xcb

[Peter Korsgaard]

>>>>> "Gaël" == Gaël PORTAY <gael.portay at savoirfairelinux.com> writes:

 > The mesa's EGL/eglplatform.h header includes X11 headers unless the flag
 > MESA_EGL_NO_X11_HEADERS is defined[1].

 > A build issue happens when mesa3d is selected as then OpenGL EGL backend
 > but the XCB library is not selected.

 > This commit tells qmake to pass the cflag MESA_EGL_NO_X11_HEADERS to
 > make and prevent from including the missing X headers.

 > The issue QTBUG-66233 is opened in the Qt tracker[1].

 > Fixes:

 > 	In file included from /home/gportay/src/buildroot/output-qt5.10/host/x86_64-buildroot-linux-gnu/sysroot/usr/include/EGL/egl.h:39:0,
 > 	                 from platform/graphics/opengl/Extensions3DOpenGLES.cpp:33:
 > 	/home/gportay/src/buildroot/output-qt5.10/host/x86_64-buildroot-linux-gnu/sysroot/usr/include/EGL/eglplatform.h:118:22: fatal error: X11/Xlib.h: No such file or directory
 > 	 #include <X11/Xlib.h>
 > 	                      ^
 > 	compilation terminated.
 > 	Makefile.WebCore.Target:93596: recipe for target '.obj/platform/graphics/opengl/Extensions3DOpenGLES.o' failed

 > [1]: https://github.com/mesa3d/mesa/blob/79ee1b2ff0b85f4eeb4165d23a7943c28d3a3d93/include/EGL/eglplatform.h#L109-L125
 > [2]: https://bugreports.qt.io/browse/QTBUG-66233

 > Cc: Julien CORJON <corjon.j at ecagroup.com>
 > Signed-off-by: Gaël PORTAY <gael.portay at savoirfairelinux.com>

Committed after simplifying, thanks.

-- 
Bye, Peter Korsgaard