1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c
index f5fc0d3..29bb059 100644
--- a/gcc/c-common.c
+++ b/gcc/c-common.c
@@ -4017,3 +4017,17 @@ c_common_insert_default_attributes (decl)
 #undef DEF_ATTR_TREE_LIST
 #undef DEF_FN_ATTR
 }
+
+/* Output a -Wshadow warning MSGID about NAME, an IDENTIFIER_NODE, and
+   additionally give the location of the previous declaration DECL.  */
+void
+shadow_warning (msgid, name, decl)
+     const char *msgid;
+     tree name, decl;
+{
+  warning ("declaration of `%s' shadows %s", IDENTIFIER_POINTER (name), msgid);
+  warning_with_file_and_line (DECL_SOURCE_FILE (decl),
+			      DECL_SOURCE_LINE (decl),
+			      "shadowed declaration is here");
+}
+