Enrico Weigelt, metux IT consult authored Mar 15, 2024 and Marge Bot committed Apr 18, 2024

Make sure everybody who needs stuff from <sys/mman.h> actually includes it,
and dropped the include from xf86_OSlib.h.

Check for all symbols defined by Open Group spec.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1412>