Merge branch 'wip/baedert/for-master' into 'main'

build: Make GCC ignore fallthrough comments

Closes #4663

See merge request GNOME/gtk!4419

gtk/gtkgesturesingle.c

@@ -200,7 +200,7 @@ gtk_gesture_single_handle_event (GtkEventController *controller,
     case GDK_TOUCHPAD_HOLD:
       if (gdk_touchpad_event_get_n_fingers (event) == 1)
         return FALSE;
-      /* fallthrough */
+      G_GNUC_FALLTHROUGH;
     case GDK_TOUCH_CANCEL:
     case GDK_GRAB_BROKEN:
     case GDK_TOUCHPAD_SWIPE:

meson.build

@@ -298,7 +298,8 @@ elif cc.get_id() == 'gcc' or cc.get_id() == 'clang'
     'array-bounds',
     'empty-body',
     'implicit',
-    'implicit-fallthrough',
+    'implicit-fallthrough',   # For non-gcc
+    'implicit-fallthrough=5', # For GCC, only recognize the attribute and no comments
     'init-self',
     'int-to-pointer-cast',
     'main',