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.

	* 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.

c/

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

	(LANG_HOOKS_SOURCE_LANGUAGE): Define.

--- gcc/langhooks.h.jj	2011-01-03 12:53:05.125745450 +0100

+++ gcc/langhooks.h	2011-01-04 17:59:43.166744926 +0100

@@ -467,6 +467,10 @@ struct lang_hooks

      gimplification.  */

   bool deep_unsharing;

+  /* 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	2011-01-03 12:53:05.000000000 +0100

+++ gcc/langhooks-def.h	2011-01-04 18:00:44.858851030 +0100

@@ -118,6 +118,7 @@ extern void lhd_omp_firstprivatize_type_

 #define LANG_HOOKS_BLOCK_MAY_FALLTHRU	hook_bool_const_tree_true

 #define LANG_HOOKS_EH_USE_CXA_END_CLEANUP	false

 #define LANG_HOOKS_DEEP_UNSHARING	false

+#define LANG_HOOKS_SOURCE_LANGUAGE	NULL

 /* Attribute hooks.  */

 #define LANG_HOOKS_ATTRIBUTE_TABLE		NULL

@@ -303,7 +304,8 @@ extern void lhd_end_section (void);

   LANG_HOOKS_EH_PROTECT_CLEANUP_ACTIONS, \

   LANG_HOOKS_BLOCK_MAY_FALLTHRU, \

   LANG_HOOKS_EH_USE_CXA_END_CLEANUP, \

-  LANG_HOOKS_DEEP_UNSHARING \

+  LANG_HOOKS_DEEP_UNSHARING, \

+  LANG_HOOKS_SOURCE_LANGUAGE \

 }

 #endif /* GCC_LANG_HOOKS_DEF_H */

--- gcc/c/c-lang.c.jj	2011-01-03 12:53:05.376056936 +0100

+++ gcc/c/c-lang.c	2011-01-04 17:59:43.167743798 +0100

@@ -36,6 +36,12 @@ 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.  */

@@ -45,6 +51,8 @@ enum c_language_kind c_language = clk_c;

 #define LANG_HOOKS_INIT c_objc_common_init

 #undef LANG_HOOKS_INIT_TS

 #define LANG_HOOKS_INIT_TS c_common_init_ts

+#undef LANG_HOOKS_SOURCE_LANGUAGE

+#define LANG_HOOKS_SOURCE_LANGUAGE c_source_language

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

 struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;

--- gcc/dwarf2out.c.jj	2011-01-03 12:53:05.102056475 +0100

+++ gcc/dwarf2out.c	2011-01-04 18:03:14.534151763 +0100

@@ -16109,9 +16109,18 @@ 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

-      && prototype_p (func_type))

-    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 (prototype_p (func_type))

+	add_AT_flag (die, DW_AT_prototyped, 1);

+      break;

+    default:

+      break;

+    }

 }

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

@@ -18915,6 +18924,10 @@ gen_compile_unit_die (const char *filena

 	  if (strcmp (language_string, "GNU Go") == 0)

 	    language = DW_LANG_Go;

 	}

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

+	       && lang_hooks.source_language

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

+	language = DW_LANG_C99;

     }

   /* Use a degraded Fortran setting in strict DWARF2 so is_fortran works.  */

   else if (strcmp (language_string, "GNU Fortran") == 0)