[Bug c++/64644] "warning: anonymous union with no members" should be an error with -pedantic-errors

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64644

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |manu at gcc dot gnu.org

--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
A untested patch, feel free to test it and submit it.

Index: decl2.c
===================================================================
--- decl2.c     (revision 218749)
+++ decl2.c     (working copy)
@@ -1604,11 +1604,11 @@ finish_anon_union (tree anon_union_decl)
   main_decl = build_anon_union_vars (type, anon_union_decl);
   if (main_decl == error_mark_node)
     return;
   if (main_decl == NULL_TREE)
     {
-      warning (0, "anonymous union with no members");
+      pedwarn (input_location, 0, "anonymous union with no members");
       return;
     }

   if (!processing_template_decl)
     {