gcc: add patch to emit DW_LANG_C99 (pr38757)

Note:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38757

base/gcc/gcc47-pr38757.patch

@@ -0,0 +1,121 @@
+# --- SDE-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
+#
+# Filename: package/.../gcc/gcc47-pr38757.patch
+# Copyright (C) 2012 The OpenSDE Project
+#
+# More information can be found in the files COPYING and README.
+#
+# This patch file is dual-licensed. It is available under the license the
+# patched project is licensed under, as long as it is an OpenSource license
+# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
+# of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+# --- SDE-COPYRIGHT-NOTE-END ---
+
+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.
+
+--- a/gcc/langhooks.h	2011-01-03 12:53:05.125745450 +0100
++++ b/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.  */
+ };
+--- a/gcc/langhooks-def.h	2011-01-03 12:53:05.000000000 +0100
++++ b/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_EH_PROTECT_CLEANUP_ACTIONS	NULL
+ #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
+@@ -307,7 +308,8 @@ extern void lhd_end_section (void);
+   LANG_HOOKS_EH_RUNTIME_TYPE, \
+   LANG_HOOKS_EH_PROTECT_CLEANUP_ACTIONS, \
+   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 */
+--- a/gcc/c-lang.c	2011-01-03 12:53:05.376056936 +0100
++++ b/gcc/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;
+--- a/gcc/dwarf2out.c	2011-01-03 12:53:05.102056475 +0100
++++ b/gcc/dwarf2out.c	2011-01-04 18:03:14.534151763 +0100
+@@ -15793,9 +15793,18 @@ 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
+@@ -18438,6 +18447,10 @@ 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;
+     }
+ 
+   add_AT_unsigned (die, DW_AT_language, language);