[gnome-desktop] build: check for the X DPMS extension

[Xan Lopez <xan src gnome org>]

commit 1e38a386da4a6c7f70f89621fa43fa1099523176
Author: Xan Lopez <xlopez igalia com>
Date:   Fri Jul 22 12:35:25 2011 -0700

    build: check for the X DPMS extension
    
    We use it unconditionally, so we need to do this if for no other
    reason that the module fails to link with GNU Gold otherwise.

 configure.ac |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 89bef10..1b902cf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -115,11 +115,13 @@ GTK_REQUIRED=3.0
 GLIB_REQUIRED=2.19.1
 XRANDR_REQUIRED=1.2
 GSETTINGS_DESKTOP_SCHEMAS_REQUIRED=0.1.4
+XEXT_REQUIRED=1.2
 
 AC_SUBST(GTK_REQUIRED)
 AC_SUBST(GLIB_REQUIRED)
 AC_SUBST(GDK_PIXBUF_REQUIRED)
 AC_SUBST(XRANDR_REQUIRED)
+AC_SUBST(XEXT_REQUIRED)
 
 dnl we need x11 for GnomeBG
 
@@ -156,7 +158,7 @@ AC_SUBST(RANDR_PACKAGE)
 
 dnl pkg-config dependency checks
 
-PKG_CHECK_MODULES(GNOME_DESKTOP, gdk-pixbuf-2.0 >= $GDK_PIXBUF_REQUIRED gtk+-3.0 >= $GTK_REQUIRED glib-2.0 >= $GLIB_REQUIRED gio-2.0 >= $GLIB_REQUIRED gsettings-desktop-schemas >= $GSETTINGS_DESKTOP_SCHEMAS_REQUIRED $RANDR_PACKAGE)
+PKG_CHECK_MODULES(GNOME_DESKTOP, gdk-pixbuf-2.0 >= $GDK_PIXBUF_REQUIRED gtk+-3.0 >= $GTK_REQUIRED glib-2.0 >= $GLIB_REQUIRED gio-2.0 >= $GLIB_REQUIRED gsettings-desktop-schemas >= $GSETTINGS_DESKTOP_SCHEMAS_REQUIRED $RANDR_PACKAGE xext >= XEXT_REQUIRED)
 
 dnl gnome-doc-utils stuff