[unique] build: Use GTK_CHECK_BACKEND macro

[Emmanuele Bassi <ebassi src gnome org>]

commit 6b645fa7b1008279b1e0f2e5c308239ad138ad15
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Sat Mar 26 18:49:32 2011 +0000

    build: Use GTK_CHECK_BACKEND macro
    
    Instead of calling pkg-config ourselves.
    
    This fixes linker issues caused by the renamed target variable in
    gtk+'s pkg-config file.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=645255

 configure.ac |   15 +++++++--------
 1 files changed, 7 insertions(+), 8 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 1d402a0..e52f0f2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -68,16 +68,15 @@ m4_define([dbus_required], [0.70])
 PKG_CHECK_MODULES(UNIQUE, glib-2.0 >= glib_required dnl
                           gtk+-3.0 >= gtk_required)
 
-gdktarget=`$PKG_CONFIG --variable=target gdk-3.0`
-AS_IF([test "X$gdktarget" = "Xx11"],
-      [
-        AC_PATH_XTRA
+GTK_CHECK_BACKEND([x11], [gtk_required],
+                  [
+                    AC_PATH_XTRA
 
-        PKG_CHECK_MODULES(UNIQUE_X11, x11)
+                    PKG_CHECK_MODULES(UNIQUE_X11, x11)
 
-        UNIQUE_CFLAGS="$UNIQUE_CFLAGS $UNIQUE_X11_CFLAGS"
-        UNIQUE_LIBS="$UNIQUE_LIBS $UNIQUE_X11_LIBS"
-      ]
+                    UNIQUE_CFLAGS="$UNIQUE_CFLAGS $UNIQUE_X11_CFLAGS"
+                    UNIQUE_LIBS="$UNIQUE_LIBS $UNIQUE_X11_LIBS"
+                  ]
 )
 
 AC_SUBST(UNIQUE_CFLAGS)