CHECK_HEADERS([XINERAMA], [Xinerama headers], [X11/extensions/Xinerama.h])
CHECK_LIB([XV], [Xv], [XvQueryExtension])
CHECK_HEADERS([XV], [Xlib Xv extention], [X11/Xlib.h X11/extensions/Xvlib.h])
CHECK_HEADERS([XINERAMA], [Xinerama headers], [X11/extensions/Xinerama.h])
CHECK_LIB([XV], [Xv], [XvQueryExtension])
CHECK_HEADERS([XV], [Xlib Xv extention], [X11/Xlib.h X11/extensions/Xvlib.h])