The spec, added in 5.7.0, simply defined WIN_INTERFACE_CUSTOM, leading
to the generic, non-X11 typedefs for the EGL native types. This is
fine for the typical embedded use, but is not what is wanted when
targeting xcb, and leads to disabling EGL-on-X support.
Therefore, move the define into a comon header and let the individual
libs decide by defining or not defining QT_EGL_NO_X11. This sets both
MESA_EGL_NO_X11_HEADERS and WIN_INTERFACE_CUSTOM in qt_egl_p.h.
This way Qt builds supporting all three of eglfs (DRM+EGLDevice),
wayland, and xcb (EGL) can be generated out of the box.
[ChangeLog][Platform Specific Changes][Linux] xcb with EGL and OpenGL
ES, as well as eglfs with the eglfs_x11 backend, are now supported on
DRIVE CX boards when using the linux-drive-cx-g++ device spec.
Done-with: Louai Al-Khanji <louai.al-khanji@qt.io>
Task-number: QTBUG-55140
Change-Id: I6f186d16612e170995e3bca1214bcabad59af08e
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
e694ced803