re PR bootstrap/66448 (Bootstrap fails on darwin after r224161)

	PR bootstrap/66448
	* toplev.c (check_global_declaration): Don't warn about a clone.

From-SVN: r224285

gcc/ChangeLog

+2015-06-09  Jason Merrill  <jason@redhat.com>
+
+	PR bootstrap/66448
+	* toplev.c (check_global_declaration): Don't warn about a clone.
+
 2015-06-09  Marek Polacek  <polacek@redhat.com>
 
 	PR tree-optimization/66299

gcc/testsuite/g++.dg/warn/Wunused-function1.C

+// PR bootstrap/66448
+// { dg-options "-Wunused-function" }
+
+struct A { A(); };
+namespace {
+  struct B: virtual A { B(); };
+  B::B() { }
+  B b;
+
+  struct C: virtual A { C(); };
+  C::C() { }			// { dg-warning "defined but not used" }
+}

gcc/toplev.c

@@ -529,6 +529,7 @@ check_global_declaration (tree decl)
       && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
       && ! DECL_EXTERNAL (decl)
       && ! DECL_ARTIFICIAL (decl)
+      && ! DECL_ABSTRACT_ORIGIN (decl)
       && ! TREE_PUBLIC (decl)
       /* A volatile variable might be used in some non-obvious way.  */
       && ! TREE_THIS_VOLATILE (decl)