configure.in: add flag to disable canberra

For embedded builds, it'd be nice to be able to disable canberra.
Canberra is still enabled by default.

Signed-off-by: Michael Smith <msmith@cbnco.com>

--- metacity-2.30.3/config.h.in.orig	2010-11-08 15:41:29.000000000 -0500
+++ metacity-2.30.3/config.h.in	2010-11-08 15:51:54.000000000 -0500
@@ -15,6 +15,9 @@
 /* Define to 1 if you have the `bind_textdomain_codeset' function. */
 #undef HAVE_BIND_TEXTDOMAIN_CODESET
 
+/* Build with canberra support */
+#undef HAVE_CANBERRA
+
 /* Building with compositing manager support */
 #undef HAVE_COMPOSITE_EXTENSIONS
 
--- metacity-2.30.3/configure.in.orig	2010-11-08 15:41:15.000000000 -0500
+++ metacity-2.30.3/configure.in	2010-11-08 15:51:44.000000000 -0500
@@ -155,7 +155,7 @@
        ;;
 esac
 
-METACITY_PC_MODULES="gtk+-$GTK_API_VERSION >= $GTK_MIN_VERSION pango >= 1.2.0 $CANBERRA_GTK"
+METACITY_PC_MODULES="gtk+-$GTK_API_VERSION >= $GTK_MIN_VERSION pango >= 1.2.0"
 AC_SUBST(GTK_API_VERSION)
 
 AC_ARG_ENABLE(gconf,
@@ -168,6 +168,16 @@
     METACITY_PC_MODULES="$METACITY_PC_MODULES gconf-2.0 >= 1.2.0"
 fi
 
+AC_ARG_ENABLE(canberra,
+  AC_HELP_STRING([--disable-canberra],
+                 [disable use of canberra for event sounds, for embedded non-GNOME builds]),,
+  enable_canberra=yes)
+
+if test x$enable_canberra = xyes; then
+    AC_DEFINE(HAVE_CANBERRA,1,[Build with canberra support])
+    METACITY_PC_MODULES="$METACITY_PC_MODULES $CANBERRA_GTK"
+fi
+
 AC_ARG_ENABLE(verbose-mode,
   AC_HELP_STRING([--disable-verbose-mode],
                  [disable metacity's ability to do verbose logging, for embedded/size-sensitive custom builds]),,
@@ -596,6 +606,7 @@
 	compiler:		  ${CC}
 
 	GConf:                    ${enable_gconf}
+	Canberra:                 ${enable_canberra}
 	XFree86 Xinerama:         ${use_xfree_xinerama}
 	Solaris Xinerama:         ${use_solaris_xinerama}
 	Startup notification:     ${have_startup_notification}
--- metacity-2.30.3/src/core/bell.c.orig	2010-09-04 12:09:52.000000000 -0400
+++ metacity-2.30.3/src/core/bell.c	2010-11-08 15:54:47.000000000 -0500
@@ -52,7 +52,10 @@
 #include "bell.h"
 #include "screen-private.h"
 #include "prefs.h"
+
+#ifdef HAVE_CANBERRA
 #include <canberra-gtk.h>
+#endif
 
 /**
  * Flashes one entire screen.  This is done by making a window the size of the
@@ -284,8 +287,10 @@
 
   if (meta_prefs_bell_is_audible ()) 
     {
-      ca_proplist *p;
       XkbBellNotifyEvent *xkb_bell_event = (XkbBellNotifyEvent*) xkb_ev;
+
+#ifdef HAVE_CANBERRA
+      ca_proplist *p;
       MetaWindow *window;
       int res;
 
@@ -312,6 +317,9 @@
       ca_proplist_destroy (p);
 
       if (res != CA_SUCCESS && res != CA_ERROR_DISABLED)
+#else
+      if (1)
+#endif /* HAVE_CANBERRA */
         {      
           /* ...and in case that failed we use the classic X11 bell. */
           XkbForceDeviceBell (display->xdisplay, 
--- metacity-2.30.3/src/core/workspace.c.orig	2010-09-04 12:09:53.000000000 -0400
+++ metacity-2.30.3/src/core/workspace.c	2010-11-08 15:50:52.000000000 -0500
@@ -29,7 +29,10 @@
 #include "prefs.h"
 #include <X11/Xatom.h>
 #include <string.h>
+
+#ifdef HAVE_CANBERRA
 #include <canberra-gtk.h>
+#endif
 
 void meta_workspace_queue_calc_showing   (MetaWorkspace *workspace);
 static void set_active_space_hint        (MetaScreen *screen);
@@ -355,11 +358,13 @@
     goto finish;
   }
 
+#ifdef HAVE_CANBERRA
   ca_context_play(ca_gtk_context_get(), 1,
                   CA_PROP_EVENT_ID, e,
                   CA_PROP_EVENT_DESCRIPTION, "Desktop switched",
                   CA_PROP_CANBERRA_CACHE_CONTROL, "permanent",
                   NULL);
+#endif
 
  finish:
   meta_screen_free_workspace_layout (&layout);
