2009-03-18  Jakub Jelinek  <jakub@redhat.com>

	PR debug/38757

	* langhooks.h (struct lang_hooks): Add source_language langhook.

	* langhooks-def.h (LANG_HOOKS_SOURCE_LANGUAGE): Define to NULL.

	(LANG_HOOKS_INITIALIZER): Add LANG_HOOKS_SOURCE_LANGUAGE.

	* c-lang.c (c_source_language): New function.

	(LANG_HOOKS_SOURCE_LANGUAGE): Define.

	* dwarf2out.c (add_prototyped_attribute): Add DW_AT_prototype

	also for DW_LANG_{C,C99,ObjC}.

	(gen_compile_unit_die): Use lang_hooks.source_language () to

	determine if DW_LANG_C99 or DW_LANG_C89 should be returned.

--- gcc/langhooks.h.jj	2009-03-02 09:45:47.000000000 +0100

+++ gcc/langhooks.h	2009-03-18 12:53:24.000000000 +0100

@@ -1,5 +1,5 @@

 /* The lang_hooks data structure.

-   Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008

+   Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009

    Free Software Foundation, Inc.

 This file is part of GCC.

@@ -414,6 +414,10 @@ struct lang_hooks

      if in the process TREE_CONSTANT or TREE_SIDE_EFFECTS need updating.  */

   tree (*expr_to_decl) (tree expr, bool *tc, bool *se);

+  /* Return year of the source language standard version if the FE supports

+     multiple versions of the standard.  */

+  int (*source_language) (void);

+

   /* Whenever you add entries here, make sure you adjust langhooks-def.h

      and langhooks.c accordingly.  */

 };

--- gcc/langhooks-def.h.jj	2009-03-02 09:45:47.000000000 +0100

+++ gcc/langhooks-def.h	2009-03-18 12:53:45.000000000 +0100

@@ -1,5 +1,5 @@

 /* Default macros to initialize the lang_hooks data structure.

-   Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008

+   Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009

    Free Software Foundation, Inc.

    Contributed by Alexandre Oliva  <aoliva@redhat.com>

@@ -113,6 +113,7 @@ extern void lhd_omp_firstprivatize_type_

 #define LANG_HOOKS_EXPR_TO_DECL		lhd_expr_to_decl

 #define LANG_HOOKS_TO_TARGET_CHARSET	lhd_to_target_charset

 #define LANG_HOOKS_INIT_TS		lhd_do_nothing

+#define LANG_HOOKS_SOURCE_LANGUAGE	NULL

 /* Attribute hooks.  */

 #define LANG_HOOKS_ATTRIBUTE_TABLE		NULL

@@ -270,6 +271,7 @@ extern tree lhd_make_node (enum tree_cod

   LANG_HOOKS_BUILTIN_FUNCTION_EXT_SCOPE, \

   LANG_HOOKS_INIT_TS,          \

   LANG_HOOKS_EXPR_TO_DECL, \

+  LANG_HOOKS_SOURCE_LANGUAGE, \

 }

 #endif /* GCC_LANG_HOOKS_DEF_H */

--- gcc/c-lang.c.jj	2009-02-20 15:06:14.000000000 +0100

+++ gcc/c-lang.c	2009-03-18 13:33:41.000000000 +0100

@@ -1,6 +1,6 @@

 /* Language-specific hook definitions for C front end.

    Copyright (C) 1991, 1995, 1997, 1998,

-   1999, 2000, 2001, 2003, 2004, 2005, 2007, 2008

+   1999, 2000, 2001, 2003, 2004, 2005, 2007, 2008, 2009

    Free Software Foundation, Inc.

 This file is part of GCC.

@@ -37,6 +37,12 @@ along with GCC; see the file COPYING3.  

 enum c_language_kind c_language = clk_c;

+static int

+c_source_language (void)

+{

+  return flag_isoc99 ? 1999 : 1989;

+}

+

 /* Lang hooks common to C and ObjC are declared in c-objc-common.h;

    consequently, there should be very few hooks below.  */

@@ -44,6 +50,8 @@ enum c_language_kind c_language = clk_c;

 #define LANG_HOOKS_NAME "GNU C"

 #undef LANG_HOOKS_INIT

 #define LANG_HOOKS_INIT c_objc_common_init

+#undef LANG_HOOKS_SOURCE_LANGUAGE

+#define LANG_HOOKS_SOURCE_LANGUAGE c_source_language

 /* Each front end provides its own lang hook initializer.  */

 const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;

--- gcc/dwarf2out.c.jj	2009-03-17 13:06:29.000000000 +0100

+++ gcc/dwarf2out.c	2009-03-18 12:55:36.000000000 +0100

@@ -12470,9 +12470,18 @@ add_bit_size_attribute (dw_die_ref die, 

 static inline void

 add_prototyped_attribute (dw_die_ref die, tree func_type)

 {

-  if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89

-      && TYPE_ARG_TYPES (func_type) != NULL)

-    add_AT_flag (die, DW_AT_prototyped, 1);

+  switch (get_AT_unsigned (comp_unit_die, DW_AT_language))

+    {

+    case DW_LANG_C:

+    case DW_LANG_C89:

+    case DW_LANG_C99:

+    case DW_LANG_ObjC:

+      if (TYPE_ARG_TYPES (func_type) != NULL)

+	add_AT_flag (die, DW_AT_prototyped, 1);

+      break;

+    default:

+      break;

+    }

 }

 /* Add an 'abstract_origin' attribute below a given DIE.  The DIE is found

@@ -14419,7 +14428,13 @@ gen_compile_unit_die (const char *filena

   else if (strcmp (language_string, "GNU Objective-C++") == 0)

     language = DW_LANG_ObjC_plus_plus;

   else

-    language = DW_LANG_C89;

+    {

+      if (lang_hooks.source_language

+	  && lang_hooks.source_language () >= 1999)

+	language = DW_LANG_C99;

+      else

+	language = DW_LANG_C89;

+    }

   add_AT_unsigned (die, DW_AT_language, language);

   return die;