EGL headers including X headers has traditionally been problematic due
to getting macros for Status, None, etc.
In most cases this is not an issue anymore because on embedded one will
almost always use a driver targeting the framebuffer or DRM/KMS and
therefore the EGL headers do not pull in X dependencies.
Furthermore, Mesa supports MESA_EGL_NO_X11_HEADERS which we set, avoiding
the problem altogether with Mesa regardless of targeting X11 or KMS.
However, other drivers do not have this option. On i.MX6 for instance,
targeting X11 is problematic due to not having EGL_API_FB defined, which
in turn means the EGL headers pulls in X headers in order to be able to
define the native display and window types as Display and Window.
Try to play nice with this use case by reshuffling the includes and
undefining the problematic names.
Task-number: QTBUG-52928
Change-Id: I059f26b340b6e442e7296055915d18f5a1ce7a7f
Reviewed-by: Louai Al-Khanji <louai.al-khanji@qt.io>
ecf127505e