gio: Fix various compiler warnings when compiling with G_DISABLE_ASSERT

Mostly unused variables which are only used in a g_assert() call
otherwise.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

Helps: #1708

gio/gapplicationimpl-dbus.c

@@ -774,7 +774,7 @@ g_application_impl_command_line (GApplicationImpl    *impl,
   const gchar *object_path = "/org/gtk/Application/CommandLine";
   GMainContext *context;
   CommandLineData data;
-  guint object_id;
+  guint object_id G_GNUC_UNUSED  /* when compiling with G_DISABLE_ASSERT */;
 
   context = g_main_context_new ();
   data.loop = g_main_loop_new (context, FALSE);

gio/gdatainputstream.c

@@ -936,7 +936,7 @@ g_data_input_stream_read_until (GDataInputStream  *stream,
   /* If we're not at end of stream then we have a stop_char to consume. */
   if (result != NULL && g_buffered_input_stream_get_available (bstream) > 0)
     {
-      gsize res;
+      gsize res G_GNUC_UNUSED  /* when compiling with G_DISABLE_ASSERT */;
       gchar b;
 
       res = g_input_stream_read (G_INPUT_STREAM (stream), &b, 1, NULL, NULL);

gio/gdbusmessage.c

@@ -1714,7 +1714,7 @@ parse_value_from_blob (GMemoryBuffer       *buf,
 
               if (array_len == 0)
                 {
-                  GVariant *item;
+                  GVariant *item G_GNUC_UNUSED  /* when compiling with G_DISABLE_ASSERT */;
                   item = parse_value_from_blob (buf,
                                                 element_type,
                                                 TRUE,
@@ -2345,7 +2345,10 @@ append_value_to_blob (GVariant            *value,
         {
           gsize len;
           const gchar *v;
+#ifndef G_DISABLE_ASSERT
           const gchar *end;
+#endif
+
           v = g_variant_get_string (value, &len);
           g_assert (g_utf8_validate (v, -1, &end) && (end == v + len));
           g_memory_buffer_put_uint32 (mbuf, len);

gio/gfileinfo.c

@@ -179,7 +179,8 @@ ensure_attribute_hash (void)
   attribute_hash = g_hash_table_new (g_str_hash, g_str_equal);
 
 #define REGISTER_ATTRIBUTE(name) G_STMT_START{\
-  guint _u = _lookup_attribute (G_FILE_ATTRIBUTE_ ## name); \
+  guint _u G_GNUC_UNUSED  /* when compiling with G_DISABLE_ASSERT */; \
+  _u = _lookup_attribute (G_FILE_ATTRIBUTE_ ## name); \
   /* use for generating the ID: g_print ("#define G_FILE_ATTRIBUTE_ID_%s (%u + %u)\n", #name + 17, _u & ~ID_MASK, _u & ID_MASK); */ \
   g_assert (_u == G_FILE_ATTRIBUTE_ID_ ## name); \
 }G_STMT_END

gio/gkeyfilesettingsbackend.c

@@ -334,7 +334,7 @@ g_keyfile_settings_backend_write_one (gpointer key,
                                       gpointer user_data)
 {
   WriteManyData *data = user_data;
-  gboolean success;
+  gboolean success G_GNUC_UNUSED  /* when compiling with G_DISABLE_ASSERT */;
 
   success = set_to_keyfile (data->kfsb, key, value);
   g_assert (success);

gio/glib-compile-schemas.c

@@ -648,8 +648,10 @@ key_state_serialise (KeyState *state)
       else
         {
           GVariantBuilder builder;
+          gboolean checked G_GNUC_UNUSED  /* when compiling with G_DISABLE_ASSERT */;
 
-          g_assert (key_state_check (state, NULL));
+          checked = key_state_check (state, NULL);
+          g_assert (checked);
 
           g_variant_builder_init (&builder, G_VARIANT_TYPE_TUPLE);
 

gio/glocalfilemonitor.c

@@ -328,6 +328,7 @@ g_file_monitor_source_send_synthetic_created (GFileMonitorSource *fms,
   g_file_monitor_source_queue_event (fms, G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, child, NULL);
 }
 
+#ifndef G_DISABLE_ASSERT
 static gboolean
 is_basename (const gchar *name)
 {
@@ -336,6 +337,7 @@ is_basename (const gchar *name)
 
   return !strchr (name, '/');
 }
+#endif  /* !G_DISABLE_ASSERT */
 
 gboolean
 g_file_monitor_source_handle_event (GFileMonitorSource *fms,

gio/gsettingsschema.c

@@ -1455,7 +1455,7 @@ gint
 g_settings_schema_key_to_enum (GSettingsSchemaKey *key,
                                GVariant           *value)
 {
-  gboolean it_worked;
+  gboolean it_worked G_GNUC_UNUSED  /* when compiling with G_DISABLE_ASSERT */;
   guint result;
 
   it_worked = strinfo_enum_from_string (key->strinfo, key->strinfo_length,
@@ -1499,7 +1499,7 @@ g_settings_schema_key_to_flags (GSettingsSchemaKey *key,
   g_variant_iter_init (&iter, value);
   while (g_variant_iter_next (&iter, "&s", &flag))
     {
-      gboolean it_worked;
+      gboolean it_worked G_GNUC_UNUSED  /* when compiling with G_DISABLE_ASSERT */;
       guint flag_value;
 
       it_worked = strinfo_enum_from_string (key->strinfo, key->strinfo_length, flag, &flag_value);

gio/gsocketconnection.c

@@ -389,7 +389,9 @@ g_socket_connection_set_property (GObject      *object,
 static void
 g_socket_connection_constructed (GObject *object)
 {
+#ifndef G_DISABLE_ASSERT
   GSocketConnection *connection = G_SOCKET_CONNECTION (object);
+#endif
 
   g_assert (connection->priv->socket != NULL);
 }

gio/gsubprocess.c

@@ -575,7 +575,7 @@ initable_init (GInitable     *initable,
 
   {
     guint64 identifier;
-    gint s;
+    gint s G_GNUC_UNUSED  /* when compiling with G_DISABLE_ASSERT */;
 
 #ifdef G_OS_WIN32
     identifier = (guint64) GetProcessId (self->pid);

gio/inotify/ginotifyfilemonitor.c

@@ -55,7 +55,7 @@ g_inotify_file_monitor_start (GLocalFileMonitor  *local_monitor,
                               GFileMonitorSource *source)
 {
   GInotifyFileMonitor *inotify_monitor = G_INOTIFY_FILE_MONITOR (local_monitor);
-  gboolean success;
+  gboolean success G_GNUC_UNUSED  /* when compiling with G_DISABLE_ASSERT */;
 
   /* should already have been called, from is_supported() */
   success = _ih_startup ();
@@ -83,7 +83,9 @@ g_inotify_file_monitor_cancel (GFileMonitor *monitor)
 static void
 g_inotify_file_monitor_finalize (GObject *object)
 {
+#ifndef G_DISABLE_ASSERT
   GInotifyFileMonitor *inotify_monitor = G_INOTIFY_FILE_MONITOR (object);
+#endif
 
   /* must surely have been cancelled already */
   g_assert (!inotify_monitor->sub);