app, libgimp, libgimpbase, libgimpwidgets, plug-ins: Add macro to unused code

This fixes Apple Clang warnings about:

- xdiff
- ydiff
- gimp_ui_get_foreign_window
- locale_parser_parse
- use_app_menu
- gimp_unique_dbus*
- transient_set
- gimp_get_foreign_window
- support

app/display/gimpimagewindow.c

@@ -371,7 +371,9 @@ gimp_image_window_constructed (GObject *object)
   GimpGuiConfig          *config;
   GimpDeviceManager      *device_manager;
   gboolean                use_gtk_menubar = TRUE;
+#ifndef GDK_WINDOWING_QUARTZ
   gboolean                use_app_menu    = TRUE;
+#endif
 
   G_OBJECT_CLASS (parent_class)->constructed (object);
 

app/unique.c

@@ -32,12 +32,12 @@
 
 #include "unique.h"
 
-#ifndef G_OS_WIN32
+#if !defined(G_OS_WIN32) && !defined(PLATFORM_OSX)
 static gboolean  gimp_unique_dbus_open  (const gchar **filenames,
                                          gboolean      as_new);
 static gboolean  gimp_unique_dbus_batch_run (const gchar  *batch_interpreter,
                                              const gchar **batch_commands);
-#else
+#elif defined(G_OS_WIN32)
 static gboolean  gimp_unique_win32_open (const gchar **filenames,
                                          gboolean      as_new);
 #endif
@@ -147,7 +147,7 @@ gimp_unique_win32_open (const gchar **filenames,
   return FALSE;
 }
 
-#else
+#elif !defined(PLATFORM_OSX)
 
 static gboolean
 gimp_unique_dbus_open (const gchar **filenames,

app/widgets/gimpwidgets-utils.c

@@ -923,7 +923,7 @@ gimp_window_set_hint (GtkWindow      *window,
 
 /* similar to what we have in libgimp/gimpui.c */
 /* TODO: Restore when we use it on Windows */
-#ifndef G_OS_WIN32
+#if !defined(G_OS_WIN32) && !defined(PLATFORM_OSX)
 static GdkWindow *
 gimp_get_foreign_window (gpointer window)
 {
@@ -2595,7 +2595,7 @@ gimp_window_set_transient_cb (GtkWidget   *window,
                               GdkEventAny *event G_GNUC_UNUSED,
                               GBytes      *handle)
 {
-#ifndef G_OS_WIN32
+#if !defined(G_OS_WIN32) && !defined(PLATFORM_OSX)
   gboolean transient_set = FALSE;
 #endif
 

libgimp/gimpui.c

@@ -72,7 +72,7 @@ static void        gimp_ensure_modules             (void);
 static gboolean    gimp_osx_focus_window           (gpointer);
 #endif
 
-#ifndef GDK_WINDOWING_WIN32
+#if !defined(GDK_WINDOWING_WIN32) && !defined(GDK_WINDOWING_QUARTZ)
 static GdkWindow * gimp_ui_get_foreign_window      (gpointer           window);
 #endif
 static gboolean    gimp_window_transient_on_mapped (GtkWidget         *window,
@@ -404,7 +404,7 @@ gimp_osx_focus_window (gpointer user_data)
 /* Currently broken on Win32 so avoiding a "defined but not used"
  * warning when building on Windows.
  */
-#ifndef GDK_WINDOWING_WIN32
+#if !defined(GDK_WINDOWING_WIN32) && !defined(GDK_WINDOWING_QUARTZ)
 static GdkWindow *
 gimp_ui_get_foreign_window (gpointer window)
 {

libgimpbase/test-cpu-accel.c

@@ -12,11 +12,13 @@
 static void
 cpu_accel_print_results (void)
 {
+#if defined(ARCH_X86) || defined(ARCH_PPC)
   GimpCpuAccelFlags  support;
 
   g_printerr ("Testing CPU features...\n");
 
   support = gimp_cpu_accel_get_support ();
+#endif
 
 #ifdef ARCH_X86
   g_printerr ("  mmx     : %s\n",

libgimpwidgets/gimpruler.c

@@ -614,18 +614,20 @@ gimp_ruler_set_position (GimpRuler *ruler,
 
   if (ruler->position != position)
     {
+#ifndef GDK_WINDOWING_QUARTZ
       GdkRectangle rect;
       gint xdiff, ydiff;
+#endif
 
       ruler->position = position;
       g_object_notify_by_pspec (G_OBJECT (ruler), object_props[PROP_POSITION]);
 
+#ifndef GDK_WINDOWING_QUARTZ
       rect = gimp_ruler_get_pos_rect (ruler, ruler->position);
 
       xdiff = rect.x - ruler->last_pos_rect.x;
       ydiff = rect.y - ruler->last_pos_rect.y;
 
-#ifndef GDK_WINDOWING_QUARTZ
       /*
        * If the position has changed far enough, queue a redraw immediately.
        * Otherwise, we only queue a redraw in a low priority idle handler, to

plug-ins/help/gimphelplocale.c

@@ -124,12 +124,14 @@ typedef struct
   gchar             *id_attr_name;
 } LocaleParser;
 
+#ifndef PLATFORM_OSX
 static gboolean  locale_parser_parse       (GMarkupParseContext  *context,
                                             GimpHelpProgress     *progress,
                                             GInputStream         *stream,
                                             goffset               size,
                                             GCancellable         *cancellable,
                                             GError              **error);
+#endif
 static void  locale_parser_start_element   (GMarkupParseContext  *context,
                                             const gchar          *element_name,
                                             const gchar         **attribute_names,
@@ -315,6 +317,7 @@ gimp_help_locale_parse (GimpHelpLocale    *locale,
   return success;
 }
 
+#ifndef PLATFORM_OSX
 static gboolean
 locale_parser_parse (GMarkupParseContext  *context,
                      GimpHelpProgress     *progress,
@@ -353,6 +356,7 @@ locale_parser_parse (GMarkupParseContext  *context,
 
   return FALSE;
 }
+#endif
 
 static void
 locale_parser_start_element (GMarkupParseContext *context,