check_c_source_compiles("
#include <X11/Xlib.h>
#include <X11/XKBlib.h>
int main(int argc, char *argv[])
{
	Display *disp = XOpenDisplay(NULL);
	KeyCode kc = 0;
	KeySym ks = XkbKeycodeToKeysym(disp, kc, 0, 0);
	XCloseDisplay(disp);
	return (ks != NoSymbol);
}
" HAVE_XKB)

check_library_exists(X11 XkbLockModifiers "" HAVE_XKB)

endif (HAVE_XKB)