[glib: 1/3] gmacros: Add G_GNUC_UNUSED for autoptr funcs (notably GLists)

[Philip Withnall <pwithnall src gnome org>]

commit b41bff1fe928a530ac63601deca8f87cb2e062f8
Author: Colin Walters <walters verbum org>
Date:   Tue May 22 21:00:04 2018 +0000

    gmacros: Add G_GNUC_UNUSED for autoptr funcs (notably GLists)
    
    In commit f49a93b20761a0be51b22c481503b4cda0f7264f
    from bug https://bugzilla.gnome.org/show_bug.cgi?id=791342
    we added two new static inline cleanup helpers in case a type was
    used inside a list.
    
    These functions will commonly be unused.
    
    In rpm-ostree, we run a build using `CC=clang -Werror=unused` because
    it catches `g_autofree char *foo = NULL;` as unused, but GCC doesn't.
    When trying to update to F28 with a newer glib, our CI fell over on this.
    
    Mark all of the autocleanups as "maybe unused".

 glib/gmacros.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/glib/gmacros.h b/glib/gmacros.h
index 55fb81e5b..03876d8ce 100644
--- a/glib/gmacros.h
+++ b/glib/gmacros.h
@@ -482,9 +482,9 @@
   typedef GList *_GLIB_AUTOPTR_LIST_TYPENAME(TypeName);                                                      
   \
   typedef GSList *_GLIB_AUTOPTR_SLIST_TYPENAME(TypeName);                                                    
     \
   G_GNUC_BEGIN_IGNORE_DEPRECATIONS                                                                           
   \
-  static inline void _GLIB_AUTOPTR_FUNC_NAME(TypeName) (TypeName **_ptr) { if (*_ptr) (func) (*_ptr); }      
   \
-  static inline void _GLIB_AUTOPTR_LIST_FUNC_NAME(TypeName) (GList **_l) { g_list_free_full (*_l, 
(GDestroyNotify) func); } \
-  static inline void _GLIB_AUTOPTR_SLIST_FUNC_NAME(TypeName) (GSList **_l) { g_slist_free_full (*_l, 
(GDestroyNotify) func); } \
+  static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_FUNC_NAME(TypeName) (TypeName **_ptr) { if (*_ptr) (func) 
(*_ptr); }         \
+  static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_LIST_FUNC_NAME(TypeName) (GList **_l) { g_list_free_full 
(*_l, (GDestroyNotify) func); } \
+  static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_SLIST_FUNC_NAME(TypeName) (GSList **_l) { g_slist_free_full 
(*_l, (GDestroyNotify) func); } \
   G_GNUC_END_IGNORE_DEPRECATIONS
 #define G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(TypeName, func) \
   G_GNUC_BEGIN_IGNORE_DEPRECATIONS                                                                           
   \