FreeBSD Port: libGL-1.0_1

[Vitold S]

In file included from /usr/X11R6/include/X11/Xlibint.h:43,
                 from glxclient.h:48,
                 from clientattrib.c:39:
/usr/X11R6/include/X11/Xlib.h:3573: error: syntax error before "_X_SENTINEL"
/usr/X11R6/include/X11/Xlib.h:3578: error: syntax error before "_X_SENTINEL"
/usr/X11R6/include/X11/Xlib.h:3591: error: syntax error before "_X_SENTINEL"
/usr/X11R6/include/X11/Xlib.h:3604: error: syntax error before "_X_SENTINEL"
/usr/X11R6/include/X11/Xlib.h:3609: error: syntax error before "_X_SENTINEL"
/usr/X11R6/include/X11/Xlib.h:3841: error: syntax error before "_X_SENTINEL"
/usr/X11R6/include/X11/Xlib.h:3845: error: syntax error before "_X_SENTINEL"
/usr/X11R6/include/X11/Xlib.h:3857: error: syntax error before "_X_SENTINEL"
/usr/X11R6/include/X11/Xlib.h:3885: error: syntax error before "_X_SENTINEL"
/usr/X11R6/include/X11/Xlib.h:3889: error: syntax error before "_X_SENTINEL"
/usr/X11R6/include/X11/Xlib.h:3929: error: syntax error before "_X_SENTINEL"
*** Error code 1

Stop in /usr/ports/x11/libGL/work/xc/lib/GL/glx.
*** Error code 1

Stop in /usr/ports/x11/libGL/work/xc/lib/GL.
*** Error code 1

Stop in /usr/ports/x11/libGL.