re PR c/63567 (Linux kernel build error due to non-static initializers)

	PR c/63567
	* c-typeck.c (output_init_element): Allow initializing objects with
	static storage duration with compound literals even in C99 and add
	pedwarn for it.

	* gcc.dg/pr63567-3.c: New test.
	* gcc.dg/pr63567-4.c: New test.

From-SVN: r216440

gcc/c/ChangeLog

+2014-10-19  Marek Polacek  <polacek@redhat.com>
+
+	PR c/63567
+	* c-typeck.c (output_init_element): Allow initializing objects with
+	static storage duration with compound literals even in C99 and add
+	pedwarn for it.
+
 2014-10-17  Marek Polacek  <polacek@redhat.com>
 
 	PR c/63567

gcc/c/c-typeck.c

@@ -8251,11 +8251,14 @@ output_init_element (location_t loc, tree value, tree origtype,
     value = array_to_pointer_conversion (input_location, value);
 
   if (TREE_CODE (value) == COMPOUND_LITERAL_EXPR
-      && require_constant_value && !flag_isoc99 && pending)
+      && require_constant_value && pending)
     {
       /* As an extension, allow initializing objects with static storage
 	 duration with compound literals (which are then treated just as
 	 the brace enclosed list they contain).  */
+      if (flag_isoc99)
+	pedwarn_init (loc, OPT_Wpedantic, "initializer element is not "
+		      "constant");
       tree decl = COMPOUND_LITERAL_EXPR_DECL (value);
       value = DECL_INITIAL (decl);
     }

gcc/testsuite/ChangeLog

+2014-10-19  Marek Polacek  <polacek@redhat.com>
+
+	PR c/63567
+	* gcc.dg/pr63567-3.c: New test.
+	* gcc.dg/pr63567-4.c: New test.
+
 2014-10-19  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>
 
 	* gcc.dg/atomic/c11-atomic-exec-5.c

gcc/testsuite/gcc.dg/pr63567-3.c

+/* PR c/63567 */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+struct T { int i; };
+struct S { struct T t; };
+struct S s = { .t = { (int) { 1 } } };

gcc/testsuite/gcc.dg/pr63567-4.c

+/* PR c/63567 */
+/* { dg-do compile } */
+/* { dg-options "-Wpedantic" } */
+
+struct T { int i; };
+struct S { struct T t; };
+struct S s = { .t = { (int) { 1 } } }; /* { dg-warning "initializer element is not constant" } */