5ddb347a23
rpi4 doesn't contain dispmanx but still contains bcm_host.pc which confuses the configure detection. Add an explicit check for EGL_DISPMANX_WINDOW_T to ensure that we only build with dispmanx when the types are available. Fixes: https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/issues/893 Fixes: https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/issues/952 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3230>