Objective-C/C++ : Allow visibility prefix attributes on interfaces.

This passes visibiliy through without warning (so that, for example,
__attribute__((__visibility("default"))) does not result in any
diagnostic).

gcc/objc/ChangeLog:

	* objc-act.c (start_class): Accept visibility attributes
	without warning.

diff --git a/gcc/objc/objc-act.c b/gcc/objc/objc-act.c
index 26cdeddfc5af63bf961618b6a5abcd0ae036c0a9..68d829fd773d8bca4e0962acc61c6f965e1c5604 100644 (file)
--- a/gcc/objc/objc-act.c
+++ b/gcc/objc/objc-act.c
@@ -7013,12 +7013,14 @@ start_class (enum tree_code code, tree class_name, tree super_name,
              tree name = TREE_PURPOSE (attribute);
 
              /* TODO: Document what the objc_exception attribute is/does.  */
-             /* We handle the 'deprecated' and (undocumented) 'objc_exception'
-                attributes.  */
+             /* We handle the 'deprecated', 'visibility' and (undocumented)
+                'objc_exception' attributes.  */
              if (is_attribute_p  ("deprecated", name))
                TREE_DEPRECATED (klass) = 1;
              else if (is_attribute_p  ("objc_exception", name))
                CLASS_HAS_EXCEPTION_ATTR (klass) = 1;
+             else if (is_attribute_p  ("visibility", name))
+               ;
              else
                /* Warn about and ignore all others for now, but store them.  */
                warning (OPT_Wattributes, "%qE attribute directive ignored", name);