cairo: enhanced cairo to build without X11 if X11 is not available

x11/cairo/cairo.conf

@@ -2,6 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../cairo/cairo.conf
+# Copyright (C) 2008 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 #
 # More information can be found in the files COPYING and README.
@@ -16,3 +17,10 @@ pkginstalled glitz && var_append confopt ' ' "--enable-glitz"
 var_append confopt ' ' "--enable-ps"
 var_append confopt ' ' "--enable-pdf"
 #var_append confopt ' ' "--enable-atsui" # Mac OS X backend ?
+
+#Disable X11 binding if X11 not available
+if ! pkginstalled libx11; then
+        var_append confopt ' ' "--enable-xlib=no"
+        var_append confopt ' ' "--enable-xlib-render=no"
+fi
+