re PR c/37481 (-pedantic accepts flexible array member = "string" initialization)

	PR c/37481
	* c-typeck.c (digest_init): Check for initializing an array with a
	string literal.

testsuite:
	* gcc.dg/c99-flex-array-7.c: New test.

From-SVN: r146359

gcc/ChangeLog

 2009-04-19  Joseph Myers  <joseph@codesourcery.com>
 
+	PR c/37481
+	* c-typeck.c (digest_init): Check for initializing an array with a
+	string literal.
+
+2009-04-19  Joseph Myers  <joseph@codesourcery.com>
+
 	PR c/19771
 	* c-semantics.c (pop_stmt_list): Propagate
 	STATEMENT_LIST_HAS_LABEL to parent statement list.

gcc/c-typeck.c

@@ -5254,6 +5254,10 @@ digest_init (tree type, tree init, bool null_pointer_constant,
 	  expr.original_type = NULL;
 	  maybe_warn_string_init (type, expr);
 
+	  if (TYPE_DOMAIN (type) && !TYPE_MAX_VALUE (TYPE_DOMAIN (type)))
+	    pedwarn_init (input_location, OPT_pedantic,
+			  "initialization of a flexible array member");
+
 	  if (comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (inside_init)),
 			 TYPE_MAIN_VARIANT (type)))
 	    return inside_init;

gcc/testsuite/ChangeLog

 2009-04-19  Joseph Myers  <joseph@codesourcery.com>
 
+	PR c/37481
+	* gcc.dg/c99-flex-array-7.c: New test.
+
+2009-04-19  Joseph Myers  <joseph@codesourcery.com>
+
 	PR c/19771
 	* gcc.c-torture/execute/vla-dealloc-1.c: New test.
 

gcc/testsuite/gcc.dg/c99-flex-array-7.c

+/* Initialization of a flexible array member with a string constant
+   must be diagnosed.  PR 37481.  */
+/* { dg-do compile } */
+/* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
+
+struct s { int a; char b[]; };
+
+struct s a = { 0, "" }; /* { dg-error "initialization of a flexible array member" } */
+/* { dg-error "near init" "near init" { target *-*-* } 8 } */
+struct s b = { 0, { 0 } }; /* { dg-error "initialization of a flexible array member" } */
+/* { dg-error "near init" "near init" { target *-*-* } 10 } */
+struct s c = { 0, { } }; /* { dg-error "ISO C forbids empty initializer braces" } */
+struct s d = { .b = "" }; /* { dg-error "initialization of a flexible array member" } */
+/* { dg-error "near init" "near init" { target *-*-* } 13 } */
+struct s e = { .b = { 0 } }; /* { dg-error "initialization of a flexible array member" } */
+/* { dg-error "near init" "near init" { target *-*-* } 15 } */
+struct s f = { .b = { } }; /* { dg-error "ISO C forbids empty initializer braces" } */