[gnome-shell] build: Add the 'gl' pkg-config

[Emmanuele Bassi <ebassi src gnome org>]

commit 235cb9c505a9c24934dcb4d307edc8facf82da6b
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sat Jan 14 23:58:53 2012 +0000

    build: Add the 'gl' pkg-config
    
    Cogl does not explicitly link against GL or GLES any more, and Clutter
    master dropped the 'gl' pkg-config requirement because it introduced
    unneeded and conflicting dependencies.
    
    GNOME Shell still uses glXQuery* API, so it needs to explicitly link
    against libGL.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=667864

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d0c99dd..b4d5afe 100644
--- a/configure.ac
+++ b/configure.ac
@@ -84,6 +84,7 @@ PKG_CHECK_MODULES(GNOME_SHELL, gio-unix-2.0 >= $GIO_MIN_VERSION
                                gjs-internals-1.0 >= $GJS_MIN_VERSION
 			       libgnome-menu-3.0 $recorder_modules
                                gdk-x11-3.0 libsoup-2.4
+                               gl
 			       clutter-x11-1.0 >= $CLUTTER_MIN_VERSION
 			       clutter-glx-1.0 >= $CLUTTER_MIN_VERSION
                                libstartup-notification-1.0 >= $STARTUP_NOTIFICATION_MIN_VERSION