+# X11_EXT_XRANDR()
+#
+# Check for the presence of the "XRandR" X Window System extension.
+# Defines "XRANDR" and sets the $(XRANDR) variable to "yes" if the extension is
+# present.
+AC_DEFUN([X11_EXT_XRANDR],
+[
+ AC_REQUIRE([X11_DEVEL])
+
+ # Store these
+ OLDLIBS=$LIBS
+ OLDCPPFLAGS=$CPPFLAGS
+
+ CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+ LIBS="$LIBS $X_LIBS -lXext -lXrender -lXrandr"
+
+ AC_CHECK_LIB([Xrandr], [XRRSelectInput],
+ AC_MSG_CHECKING([for X11/extensions/Xrandr.h])
+ AC_TRY_LINK(
+ [
+ #include <X11/Xlib.h>
+ #include <X11/extensions/Xrandr.h>
+ ],
+ [
+ Display *d;
+ Drawable r;
+ int i;
+ XRRQueryExtension(d, &i, &i);
+ XRRGetScreenInfo(d, r);
+ ],
+ [
+ AC_MSG_RESULT([yes])
+ XRANDR="yes"
+ AC_DEFINE([XRANDR], [1], [Found the XRandR extension])
+
+ XRANDR_CFLAGS=""
+ XRANDR_LIBS="-lXext -lXrender -lXrandr"
+ AC_SUBST(XRANDR_CFLAGS)
+ AC_SUBST(XRANDR_LIBS)
+ ],
+ [
+ AC_MSG_RESULT([no])
+ XRANDR="no"
+ ])
+ )
+
+ LIBS=$OLDLIBS
+ CPPFLAGS=$OLDCPPFLAGS
+
+ AC_MSG_CHECKING([for the XRandR extension])
+ if test "$XRANDR" = "yes"; then
+ AC_MSG_RESULT([yes])
+ else
+ AC_MSG_RESULT([no])
+ fi
+])
+