prefix.h: Wrap up in extern "C" block.

	* prefix.h: Wrap up in extern "C" block.
ada/
	* adadecode.c: Wrap up in extern "C" block.
	* adadecode.h: Likewise.
	* adaint.c: Likewise.  Remove 'const' keyword.
	* adaint.h: Likewise.
	* argv.c: Likewise.
	* atree.h: Likewise.
	* cio.c: Likewise.
	* cstreams.c: Likewise.
	* env.c: Likewise.
	* exit.c: Likewise.
	* fe.h: Likewise.
	* final.c: Likewise.
	* init.c: Likewise.
	* initialize.c: Likewise.
	* link.c: Likewise.
	* namet.h: Likewise.
	* nlists.h: Likewise.
	* raise.c: Likewise.
	* raise.h: Likewise.
	* repinfo.h: Likewise.
	* seh_init.c: Likewise.
	* targext.c: Likewise.
	* tracebak.c: Likewise.
	* uintp.h: Likewise.
	* urealp.h: Likewise.
	* xeinfo.adb: Wrap up generated C code in extern "C" block.
	* xsinfo.adb: Likewise.
	* xsnamest.adb: Likewise.
	* gcc-interface/gadaint.h: Wrap up in extern "C" block.
	* gcc-interface/gigi.h: Wrap up some prototypes in extern "C" block.
	* gcc-interface/misc.c: Likewise.
	* gcc-interface/Make-lang.in (GCC_LINK): Use LINKER.
	(GNAT1_C_OBJS): Remove ada/b_gnat1.o.  List ada/seh_init.o and
	ada/targext.o here...
	(GNAT_ADA_OBJS): ...and not here.
	(GNAT1_ADA_OBJS): Add ada/b_gnat1.o.
	(GNATBIND_OBJS): Reorder.

Co-Authored-By: Eric Botcazou <ebotcazou@adacore.com>

From-SVN: r176210

35 files changed, 372 insertions, 62 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 08da4b925ec..cb1a354afab 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2011-07-12  Laurent GUERBY  <laurent@guerby.net>
+	    Eric Botcazou  <ebotcazou@adacore.com>
+
+	* prefix.h: Wrap up in extern "C" block.
+
 2011-07-12  Harsha Jagasia  <harsha.jagasia@amd.com>
 
 	AMD bdver2 Enablement
diff --git a/gcc/ada/ChangeLog b/gcc/ada/ChangeLog
index 833c44a2a59..652f33d5b47 100644
--- a/gcc/ada/ChangeLog
+++ b/gcc/ada/ChangeLog
@@ -1,3 +1,44 @@
+2011-07-12  Laurent GUERBY  <laurent@guerby.net>
+	    Eric Botcazou  <ebotcazou@adacore.com>
+
+	* adadecode.c: Wrap up in extern "C" block.
+	* adadecode.h: Likewise.
+	* adaint.c: Likewise.  Remove 'const' keyword.
+	* adaint.h: Likewise.
+	* argv.c: Likewise.
+	* atree.h: Likewise.
+	* cio.c: Likewise.
+	* cstreams.c: Likewise.
+	* env.c: Likewise.
+	* exit.c: Likewise.
+	* fe.h: Likewise.
+	* final.c: Likewise.
+	* init.c: Likewise.
+	* initialize.c: Likewise.
+	* link.c: Likewise.
+	* namet.h: Likewise.
+	* nlists.h: Likewise.
+	* raise.c: Likewise.
+	* raise.h: Likewise.
+	* repinfo.h: Likewise.
+	* seh_init.c: Likewise.
+	* targext.c: Likewise.
+	* tracebak.c: Likewise.
+	* uintp.h: Likewise.
+	* urealp.h: Likewise.
+	* xeinfo.adb: Wrap up generated C code in extern "C" block.
+	* xsinfo.adb: Likewise.
+	* xsnamest.adb: Likewise.
+	* gcc-interface/gadaint.h: Wrap up in extern "C" block.
+	* gcc-interface/gigi.h: Wrap up some prototypes in extern "C" block.
+	* gcc-interface/misc.c: Likewise.
+	* gcc-interface/Make-lang.in (GCC_LINK): Use LINKER.
+	(GNAT1_C_OBJS): Remove ada/b_gnat1.o.  List ada/seh_init.o and
+	ada/targext.o here...
+	(GNAT_ADA_OBJS): ...and not here.
+	(GNAT1_ADA_OBJS): Add ada/b_gnat1.o.
+	(GNATBIND_OBJS): Reorder.
+
 2011-07-07  Richard Henderson  <rth@redhat.com>
 
 	* gcc-interface/misc.c (gnat_init_gcc_eh): Don't call
diff --git a/gcc/ada/adadecode.c b/gcc/ada/adadecode.c
index 43f14f12792..1c48856ebf5 100644
--- a/gcc/ada/adadecode.c
+++ b/gcc/ada/adadecode.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *           Copyright (C) 2001-2009, Free Software Foundation, Inc.        *
+ *           Copyright (C) 2001-2011, Free Software Foundation, Inc.        *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -352,6 +352,10 @@ __gnat_decode (const char *coded_name, char *ada_name, int verbose)
     }
 }
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifdef IN_GCC
 char *
 ada_demangle (const char *coded_name)
@@ -402,3 +406,7 @@ get_encoding (const char *coded_name, char *encoding)
 
   *dest_index = '\0';
 }
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/adadecode.h b/gcc/ada/adadecode.h
index 8ae890726db..73dda238a09 100644
--- a/gcc/ada/adadecode.h
+++ b/gcc/ada/adadecode.h
@@ -6,7 +6,7 @@
  *                                                                          *
  *                              C Header File                               *
  *                                                                          *
- *           Copyright (C) 2001-2009, Free Software Foundation, Inc.        *
+ *           Copyright (C) 2001-2011, Free Software Foundation, Inc.        *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -29,6 +29,10 @@
  *                                                                          *
  ****************************************************************************/
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* This function will return the Ada name from the encoded form.
    The Ada coding is done in exp_dbug.ads and this is the inverse function.
    see exp_dbug.ads for full encoding rules, a short description is added
@@ -51,3 +55,7 @@ extern void get_encoding (const char *, char *);
    function used in the binutils and GDB. Always consider using __gnat_decode
    instead of ada_demangle. Caller must free the pointer returned.  */
 extern char *ada_demangle (const char *);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/adaint.c b/gcc/ada/adaint.c
index bea33f60f2c..dbd76a5e0c7 100644
--- a/gcc/ada/adaint.c
+++ b/gcc/ada/adaint.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *          Copyright (C) 1992-2010, Free Software Foundation, Inc.         *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -34,6 +34,10 @@
    package Osint.  Many of the subprograms in OS_Lib import standard
    library calls directly. This file contains all other routines.  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifdef __vxworks
 
 /* No need to redefine exit here.  */
@@ -291,9 +295,9 @@ const char *__gnat_library_template = GNAT_LIBRARY_TEMPLATE;
 /* This variable is used in hostparm.ads to say whether the host is a VMS
    system.  */
 #ifdef VMS
-const int __gnat_vmsp = 1;
+int __gnat_vmsp = 1;
 #else
-const int __gnat_vmsp = 0;
+int __gnat_vmsp = 0;
 #endif
 
 #if defined (VMS)
@@ -324,7 +328,7 @@ const int __gnat_vmsp = 0;
 #endif
 
 /* Used for Ada bindings */
-const int __gnat_size_of_file_attributes = sizeof (struct file_attributes);
+int __gnat_size_of_file_attributes = sizeof (struct file_attributes);
 
 /* Reset the file attributes as if no system call had been performed */
 void __gnat_stat_to_attr (int fd, char* name, struct file_attributes* attr);
@@ -3686,3 +3690,7 @@ void *__gnat_lwp_self (void)
    return (void *) syscall (__NR_gettid);
 }
 #endif
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/adaint.h b/gcc/ada/adaint.h
index e9ef42c6b2b..3ceecaac63a 100644
--- a/gcc/ada/adaint.h
+++ b/gcc/ada/adaint.h
@@ -6,7 +6,7 @@
  *                                                                          *
  *                              C Header File                               *
  *                                                                          *
- *          Copyright (C) 1992-2010, Free Software Foundation, Inc.         *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -29,6 +29,10 @@
  *                                                                          *
  ****************************************************************************/
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <sys/stat.h>
 #include <stdio.h>
 
@@ -262,3 +266,7 @@ extern int    get_gcc_version                      (void);
 
 extern int    __gnat_binder_supports_auto_init     (void);
 extern int    __gnat_sals_init_using_constructors  (void);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/argv.c b/gcc/ada/argv.c
index b827b030f1e..29f163972ea 100644
--- a/gcc/ada/argv.c
+++ b/gcc/ada/argv.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *         Copyright (C) 1992-2009, Free Software Foundation, Inc.          *
+ *         Copyright (C) 1992-2011, Free Software Foundation, Inc.          *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -30,17 +30,21 @@
  ****************************************************************************/
 
 /* Routines for accessing command line arguments from both the runtime
-   library and from the compiler itself. In the former case, gnat_argc
+   library and from the compiler itself.  In the former case, gnat_argc
    and gnat_argv are the original argc and argv values as stored by the
    binder generated main program, and these routines are accessed from
-   the Ada.Command_Line package. In the compiler case, gnat_argc and
+   the Ada.Command_Line package.  In the compiler case, gnat_argc and
    gnat_argv are the values as modified by toplev, and these routines
-   are accessed from the Osint package. */
+   are accessed from the Osint package.  */
 
 /* Also routines for accessing the environment from the runtime library.
    Gnat_envp is the original envp value as stored by the binder generated
    main program, and these routines are accessed from the
-   Ada.Command_Line.Environment package. */
+   Ada.Command_Line.Environment package.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 #ifdef IN_RTS
 #include "tconfig.h"
@@ -116,3 +120,7 @@ __gnat_fill_env (char *a, int i)
   if (gnat_envp != NULL)
     strncpy (a, gnat_envp[i], strlen (gnat_envp[i]));
 }
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/atree.h b/gcc/ada/atree.h
index 4cef407ebd5..553e60f1e3b 100644
--- a/gcc/ada/atree.h
+++ b/gcc/ada/atree.h
@@ -6,7 +6,7 @@
  *                                                                          *
  *                              C Header File                               *
  *                                                                          *
- *          Copyright (C) 1992-2010, Free Software Foundation, Inc.         *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -29,7 +29,11 @@
    atree.adb and must be kept synchronized with changes in these files.
 
    Note that only routines for reading the tree are included, since the tree
-   transformer is not supposed to modify the tree in any way. */
+   transformer is not supposed to modify the tree in any way.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 /* Structure used for the first part of the node in the case where we have
    an Nkind.  */
@@ -734,3 +738,6 @@ extern Node_Id Current_Error_Node;
 #define Flag253(N)     (Nodes_Ptr[(N) - First_Node_Id + 4].U.NK.flag71)
 #define Flag254(N)     (Nodes_Ptr[(N) - First_Node_Id + 4].U.NK.flag72)
 
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/cio.c b/gcc/ada/cio.c
index 277af096547..73e54270f0d 100644
--- a/gcc/ada/cio.c
+++ b/gcc/ada/cio.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *          Copyright (C) 1992-2009, Free Software Foundation, Inc.         *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -29,6 +29,10 @@
  *                                                                          *
  ****************************************************************************/
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifdef IN_RTS
 #include "tconfig.h"
 #include "tsystem.h"
@@ -129,3 +133,7 @@ mktemp (char *template)
   return tmpnam (NULL);
 }
 #endif
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/cstreams.c b/gcc/ada/cstreams.c
index 9dea9a4f13e..3477cf4e616 100644
--- a/gcc/ada/cstreams.c
+++ b/gcc/ada/cstreams.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *              Auxiliary C functions for Interfaces.C.Streams              *
  *                                                                          *
- *          Copyright (C) 1992-2010, Free Software Foundation, Inc.         *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -29,7 +29,11 @@
  *                                                                          *
  ****************************************************************************/
 
-/* Routines required for implementing routines in Interfaces.C.Streams */
+/* Routines required for implementing routines in Interfaces.C.Streams.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 #ifdef __vxworks
 #include "vxWorks.h"
@@ -242,3 +246,7 @@ __gnat_full_name (char *nam, char *buffer)
 
   return buffer;
 }
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/env.c b/gcc/ada/env.c
index c53678ab831..acd928ce86b 100644
--- a/gcc/ada/env.c
+++ b/gcc/ada/env.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *            Copyright (C) 2005-2010, Free Software Foundation, Inc.       *
+ *            Copyright (C) 2005-2011, Free Software Foundation, Inc.       *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -37,6 +37,10 @@
 #define _BSD
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifdef IN_RTS
 #include "tconfig.h"
 #include "tsystem.h"
@@ -323,3 +327,7 @@ void __gnat_clearenv (void) {
   clearenv ();
 #endif
 }
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/exit.c b/gcc/ada/exit.c
index 92873c15ce0..47983e87ef7 100644
--- a/gcc/ada/exit.c
+++ b/gcc/ada/exit.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *          Copyright (C) 1992-2009 Free Software Foundation, Inc.          *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -29,6 +29,10 @@
  *                                                                          *
  ****************************************************************************/
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifdef __alpha_vxworks
 #include "vxWorks.h"
 #endif
@@ -44,7 +48,7 @@
 
 #include "adaint.h"
 
-/* Routine used by Ada.Command_Line.Set_Exit_Status */
+/* Routine used by Ada.Command_Line.Set_Exit_Status.  */
 
 int gnat_exit_status = 0;
 
@@ -53,3 +57,7 @@ __gnat_set_exit_status (int i)
 {
   gnat_exit_status = i;
 }
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/fe.h b/gcc/ada/fe.h
index e9adbfffc92..18b14611e38 100644
--- a/gcc/ada/fe.h
+++ b/gcc/ada/fe.h
@@ -6,7 +6,7 @@
  *                                                                          *
  *                              C Header File                               *
  *                                                                          *
- *          Copyright (C) 1992-2010, Free Software Foundation, Inc.         *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -32,6 +32,10 @@
 /* This file contains definitions to access front-end functions and
    variables used by gigi.  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* comperr:  */
 
 #define Compiler_Abort comperr__compiler_abort
@@ -251,3 +255,7 @@ extern void Set_Has_No_Elaboration_Code	(Node_Id, Boolean);
 extern Boolean Backend_Overflow_Checks_On_Target;
 extern Boolean Stack_Check_Probes_On_Target;
 extern Boolean Stack_Check_Limits_On_Target;
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/final.c b/gcc/ada/final.c
index bfd519e4036..b49b3deaf8b 100644
--- a/gcc/ada/final.c
+++ b/gcc/ada/final.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *          Copyright (C) 1992-2009 Free Software Foundation, Inc.          *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -29,14 +29,22 @@
  *                                                                          *
  ****************************************************************************/
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 extern void __gnat_finalize (void);
 
 /* This routine is called at the extreme end of execution of an Ada program
    (the call is generated by the binder). The standard routine does nothing
    at all, the intention is that this be replaced by system specific code
-   where finalization is required. */
+   where finalization is required.  */
 
 void
 __gnat_finalize (void)
 {
 }
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/gcc-interface/Make-lang.in b/gcc/ada/gcc-interface/Make-lang.in
index d4344cc0f39..c471508767c 100644
--- a/gcc/ada/gcc-interface/Make-lang.in
+++ b/gcc/ada/gcc-interface/Make-lang.in
@@ -104,19 +104,19 @@ ADA_TOOLS_FLAGS_TO_PASS=\
 	"GNATLINK=../../gnatlink"	\
 	"GNATBIND=../../gnatbind"
 
-GCC_LINK=$(CC) -static-libgcc $(LDFLAGS)
+GCC_LINK=$(LINKER) $(ALL_LINKERFLAGS) -static-libgcc $(LDFLAGS)
 
 # Lists of files for various purposes.
 
 # Languages-specific object files for Ada.
+
 # Object files for gnat1 from C sources.
-GNAT1_C_OBJS = ada/b_gnat1.o ada/adadecode.o ada/adaint.o ada/cstreams.o \
- ada/cio.o ada/targtyps.o ada/decl.o ada/misc.o ada/utils.o ada/utils2.o \
- ada/trans.o ada/cuintp.o ada/argv.o ada/raise.o ada/init.o ada/tracebak.o \
- ada/initialize.o ada/env.o
+GNAT1_C_OBJS = ada/adadecode.o ada/adaint.o ada/argv.o ada/cio.o \
+ ada/cstreams.o ada/env.o ada/init.o ada/initialize.o ada/raise.o \
+ ada/seh_init.o ada/targext.o ada/tracebak.o ada/cuintp.o ada/decl.o \
+ ada/misc.o ada/utils.o ada/utils2.o ada/trans.o ada/targtyps.o
 
 # Object files from Ada sources that are used by gnat1
-
 GNAT_ADA_OBJS =	\
  ada/a-charac.o	\
  ada/a-chlat1.o	\
@@ -270,7 +270,6 @@ GNAT_ADA_OBJS =	\
  ada/scng.o	\
  ada/scos.o	\
  ada/sdefault.o	\
- ada/seh_init.o	\
  ada/sem.o	\
  ada/sem_aggr.o	\
  ada/sem_attr.o	\
@@ -320,7 +319,6 @@ GNAT_ADA_OBJS =	\
  ada/switch.o	\
  ada/system.o	\
  ada/table.o	\
- ada/targext.o	\
  ada/targparm.o	\
  ada/tbuild.o	\
  ada/tree_gen.o	\
@@ -338,24 +336,24 @@ GNAT_ADA_OBJS =	\
  ada/widechar.o
 
 # Object files for gnat executables
-GNAT1_ADA_OBJS = $(GNAT_ADA_OBJS) ada/back_end.o ada/gnat1drv.o
+GNAT1_ADA_OBJS = $(GNAT_ADA_OBJS) ada/back_end.o ada/gnat1drv.o ada/b_gnat1.o
 
 GNAT1_OBJS = $(GNAT1_C_OBJS) $(GNAT1_ADA_OBJS)
 
 GNATBIND_OBJS = \
  ada/adaint.o     \
  ada/argv.o       \
- ada/exit.o       \
  ada/cio.o        \
  ada/cstreams.o   \
  ada/env.o        \
+ ada/exit.o       \
  ada/final.o      \
  ada/init.o       \
  ada/initialize.o \
- ada/seh_init.o   \
  ada/link.o       \
- ada/targext.o    \
  ada/raise.o      \
+ ada/seh_init.o   \
+ ada/targext.o    \
  ada/tracebak.o   \
  ada/ada.o        \
  ada/a-clrefi.o   \
diff --git a/gcc/ada/gcc-interface/gadaint.h b/gcc/ada/gcc-interface/gadaint.h
index 57503f069fe..ce27a14d017 100644
--- a/gcc/ada/gcc-interface/gadaint.h
+++ b/gcc/ada/gcc-interface/gadaint.h
@@ -6,7 +6,7 @@
  *                                                                          *
  *                              C Header File                               *
  *                                                                          *
- *             Copyright (C) 2010, Free Software Foundation, Inc.           *
+ *           Copyright (C) 2010-2011, Free Software Foundation, Inc.        *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -30,6 +30,14 @@
 #ifndef GCC_ADAINT_H
 #define GCC_ADAINT_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 extern char *__gnat_to_canonical_file_spec (char *);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* GCC_ADAINT_H */
diff --git a/gcc/ada/gcc-interface/gigi.h b/gcc/ada/gcc-interface/gigi.h
index c1f1217a594..8ef609796fb 100644
--- a/gcc/ada/gcc-interface/gigi.h
+++ b/gcc/ada/gcc-interface/gigi.h
@@ -199,6 +199,10 @@ struct File_Info_Type
   Nat Num_Source_Lines;
 };
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* This is the main program of the back-end.  It sets up all the table
    structures and then generates code.  */
 extern void gigi (Node_Id gnat_root, int max_gnat_node,
@@ -218,6 +222,10 @@ extern void gigi (Node_Id gnat_root, int max_gnat_node,
                   Entity_Id standard_exception_type,
                   Int gigi_operating_mode);
 
+#ifdef __cplusplus
+}
+#endif
+
 /* GNAT_NODE is the root of some GNAT tree.  Return the root of the
    GCC tree corresponding to that GNAT tree.  Normally, no code is generated;
    we just return an equivalent tree which is used elsewhere to generate
@@ -929,6 +937,11 @@ extern int fp_size_to_prec (int size);
 /* These functions return the basic data type sizes and related parameters
    about the target machine.  */
 
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 extern Pos get_target_bits_per_unit (void);
 extern Pos get_target_bits_per_word (void);
 extern Pos get_target_char_size (void);
@@ -953,6 +966,10 @@ extern Nat get_target_strict_alignment (void);
 extern Nat get_target_double_float_alignment (void);
 extern Nat get_target_double_scalar_alignment (void);
 
+#ifdef __cplusplus
+}
+#endif
+
 /* Let code know whether we are targetting VMS without need of
    intrusive preprocessor directives.  */
 #ifndef TARGET_ABI_OPEN_VMS
diff --git a/gcc/ada/gcc-interface/misc.c b/gcc/ada/gcc-interface/misc.c
index 92426fd48b9..62e7ac7769b 100644
--- a/gcc/ada/gcc-interface/misc.c
+++ b/gcc/ada/gcc-interface/misc.c
@@ -68,12 +68,20 @@ const char **save_argv;
 extern int gnat_argc;
 extern char **gnat_argv;
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Declare functions we use as part of startup.  */
 extern void __gnat_initialize (void *);
 extern void __gnat_install_SEH_handler (void *);
 extern void adainit (void);
 extern void _ada_gnat1drv (void);
 
+#ifdef __cplusplus
+}
+#endif
+
 /* The parser for the language.  For us, we process the GNAT tree.  */
 
 static void
diff --git a/gcc/ada/init.c b/gcc/ada/init.c
index 9b6370e1a57..888ec208ca1 100644
--- a/gcc/ada/init.c
+++ b/gcc/ada/init.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *          Copyright (C) 1992-2010, Free Software Foundation, Inc.         *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -38,6 +38,10 @@
     installed by this file are used to catch the resulting signals that come
     from these probes failing (i.e. touching protected pages).  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* This file should be kept synchronized with 2sinit.ads, 2sinit.adb,
    s-init-ae653-cert.adb and s-init-xi-sparc.adb.  All these files implement
    the required functionality for different targets.  */
@@ -2403,3 +2407,7 @@ __gnat_adjust_context_for_raise (int signo ATTRIBUTE_UNUSED,
 }
 
 #endif
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/initialize.c b/gcc/ada/initialize.c
index e2ad904e9b2..90f35a0a9b4 100644
--- a/gcc/ada/initialize.c
+++ b/gcc/ada/initialize.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *          Copyright (C) 1992-2009, Free Software Foundation, Inc.         *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -32,10 +32,14 @@
 /*  This unit provides default implementation for __gnat_initialize ()
     which is called before the elaboration of the partition. It is provided
     in a separate file/object so that users can replace it easily.
-    The default implementation should be null on most targets. */
+    The default implementation should be null on most targets.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 /* The following include is here to meet the published VxWorks requirement
-   that the __vxworks header appear before any other include. */
+   that the __vxworks header appear before any other include.  */
 #ifdef __vxworks
 #include "vxWorks.h"
 #endif
@@ -359,3 +363,7 @@ __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
 }
 
 #endif
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/link.c b/gcc/ada/link.c
index 62dd683f1c7..a4722d2d3ab 100644
--- a/gcc/ada/link.c
+++ b/gcc/ada/link.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *          Copyright (C) 1992-2009, Free Software Foundation, Inc.         *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -29,9 +29,12 @@
  *                                                                          *
  ****************************************************************************/
 
-/*  This file contains host-specific parameters describing the behavior     */
-/*  of the linker. It is used by gnatlink as well as all tools that use     */
-/*  Mlib.                                                                   */
+/*  This file contains host-specific parameters describing the behavior of the
+    linker.  It is used by gnatlink as well as all tools that use Mlib.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 #include <string.h>
 
@@ -254,3 +257,7 @@ const char *__gnat_object_library_extension = ".a";
 unsigned char __gnat_separate_run_path_options = 0;
 const char *__gnat_default_libgcc_subdir = "lib";
 #endif
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/namet.h b/gcc/ada/namet.h
index 6182c8b01fe..ec2b488a5ef 100644
--- a/gcc/ada/namet.h
+++ b/gcc/ada/namet.h
@@ -6,7 +6,7 @@
  *                                                                          *
  *                              C Header File                               *
  *                                                                          *
- *            Copyright (C) 1992-2008, Free Software Foundation, Inc.       *
+ *            Copyright (C) 1992-2011, Free Software Foundation, Inc.       *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -24,7 +24,11 @@
  ****************************************************************************/
 
 /* This is the C file that corresponds to the Ada package specification
-   Namet. It was created manually from files namet.ads and namet.adb.  */
+   Namet.  It was created manually from files namet.ads and namet.adb.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 /* Structure defining a names table entry.  */
 
@@ -127,3 +131,7 @@ extern Source_File_Index Get_Source_File_Index (Source_Ptr);
 extern Logical_Line_Number Get_Logical_Line_Number (Source_Ptr);
 extern Column_Number Get_Column_Number (Source_Ptr);
 extern Source_Ptr Instantiation (Source_File_Index);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/nlists.h b/gcc/ada/nlists.h
index 1dd9394e924..3b9e6726d35 100644
--- a/gcc/ada/nlists.h
+++ b/gcc/ada/nlists.h
@@ -6,7 +6,7 @@
  *                                                                          *
  *                              C Header File                               *
  *                                                                          *
- *            Copyright (C) 1992-2008, Free Software Foundation, Inc.       *
+ *            Copyright (C) 1992-2011, Free Software Foundation, Inc.       *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -29,7 +29,11 @@
    nlists.adb and must be kept synchronized with changes in these files.
 
    Note that only routines for reading the tree are included, since the
-   tree transformer is not supposed to modify the tree in any way. */
+   tree transformer is not supposed to modify the tree in any way.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 /*  The following is the structure used for the list headers table */
 
@@ -128,3 +132,7 @@ List_Containing (Node_Id Node)
 {
   return Nodes_Ptr[Node - First_Node_Id].V.NX.link;
 }
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/raise.c b/gcc/ada/raise.c
index 1f087783b67..35b0e988ee1 100644
--- a/gcc/ada/raise.c
+++ b/gcc/ada/raise.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *             Copyright (C) 1992-2009, Free Software Foundation, Inc.      *
+ *             Copyright (C) 1992-2011, Free Software Foundation, Inc.      *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -32,6 +32,10 @@
 /* Shared routines to support exception handling.  __gnat_unhandled_terminate
    is shared between all exception handling mechanisms.  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifdef IN_RTS
 #include "tconfig.h"
 #include "tsystem.h"
@@ -79,3 +83,7 @@ __gnat_unhandled_terminate (void)
   /* Default termination handling */
   __gnat_os_exit (1);
 }
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/raise.h b/gcc/ada/raise.h
index 1ccc37bca01..d8c245f0983 100644
--- a/gcc/ada/raise.h
+++ b/gcc/ada/raise.h
@@ -6,7 +6,7 @@
  *                                                                          *
  *                              C Header File                               *
  *                                                                          *
- *          Copyright (C) 1992-2009, Free Software Foundation, Inc.         *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -29,6 +29,10 @@
  *                                                                          *
  ****************************************************************************/
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* C counterparts of what System.Standard_Library defines.  */
 
 typedef unsigned Exception_Code;
@@ -60,3 +64,7 @@ extern void __gnat_install_SEH_handler  (void *);
 extern void __gnat_adjust_context_for_raise (int, void *);
 
 extern int gnat_exit_status;
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/repinfo.h b/gcc/ada/repinfo.h
index 668f520ffa0..8d5ee6d652d 100644
--- a/gcc/ada/repinfo.h
+++ b/gcc/ada/repinfo.h
@@ -6,7 +6,7 @@
  *                                                                          *
  *                              C Header File                               *
  *                                                                          *
- *          Copyright (C) 1999-2009 Free Software Foundation, Inc.          *
+ *          Copyright (C) 1999-2011, Free Software Foundation, Inc.         *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -31,6 +31,10 @@
 
 /* This file corresponds to the Ada file repinfo.ads.  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef Uint Node_Ref;
 typedef Uint Node_Ref_Or_Val;
 typedef char TCode;
@@ -75,3 +79,7 @@ typedef char TCode;
 #define Create_Node repinfo__create_node
 extern Node_Ref Create_Node	(TCode, Node_Ref_Or_Val,
 				 Node_Ref_Or_Val, Node_Ref_Or_Val);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/seh_init.c b/gcc/ada/seh_init.c
index 012692a7ae5..2ce99f3a0c2 100644
--- a/gcc/ada/seh_init.c
+++ b/gcc/ada/seh_init.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *           Copyright (C) 2005-2009, Free Software Foundation, Inc.        *
+ *           Copyright (C) 2005-2011, Free Software Foundation, Inc.        *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -32,6 +32,10 @@
 /*  This unit contains support for SEH (Structured Exception Handling).
     Right now the only implementation is for Win32.  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifdef IN_RTS
 #include "tconfig.h"
 #include "tsystem.h"
@@ -311,3 +315,7 @@ void __gnat_install_SEH_handler (void *eh ATTRIBUTE_UNUSED)
 {
 }
 #endif
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/targext.c b/gcc/ada/targext.c
index b37cc28c6be..df4286c0d27 100644
--- a/gcc/ada/targext.c
+++ b/gcc/ada/targext.c
@@ -29,9 +29,13 @@
  *                                                                          *
  ****************************************************************************/
 
-/*  This file contains target-specific parameters describing the file       */
-/*  extension for object and executable files. It is used by the compiler,  */
-/*  binder and tools.                                                       */
+/*  This file contains target-specific parameters describing the file
+    extension for object and executable files.  It is used by the compiler,
+    binder and tools.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 #ifdef IN_RTS
 #include "tconfig.h"
@@ -54,3 +58,7 @@
 const char *__gnat_target_object_extension = TARGET_OBJECT_SUFFIX;
 const char *__gnat_target_executable_extension = TARGET_EXECUTABLE_SUFFIX;
 const char *__gnat_target_debuggable_extension = TARGET_EXECUTABLE_SUFFIX;
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/tracebak.c b/gcc/ada/tracebak.c
index c16741de7ec..6764cd42755 100644
--- a/gcc/ada/tracebak.c
+++ b/gcc/ada/tracebak.c
@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *                     Copyright (C) 2000-2010, AdaCore                     *
+ *            Copyright (C) 2000-2011, Free Software Foundation, Inc.       *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -46,6 +46,10 @@
    Alpha/VMS
 */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifdef __alpha_vxworks
 #include "vxWorks.h"
 #endif
@@ -513,3 +517,7 @@ __gnat_backtrace (void **array ATTRIBUTE_UNUSED,
 #endif
 
 #endif
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/uintp.h b/gcc/ada/uintp.h
index 630fcd18e06..b950a88cbfb 100644
--- a/gcc/ada/uintp.h
+++ b/gcc/ada/uintp.h
@@ -6,7 +6,7 @@
  *                                                                          *
  *                              C Header File                               *
  *                                                                          *
- *            Copyright (C) 1992-2010, Free Software Foundation, Inc.       *
+ *            Copyright (C) 1992-2011, Free Software Foundation, Inc.       *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -23,8 +23,12 @@
  *                                                                          *
  ****************************************************************************/
 
-/* This file corresponds to the Ada package specification Uintp. It was
-   created manually from the files uintp.ads and uintp.adb  */
+/* This file corresponds to the Ada package specification Uintp.  It was
+   created manually from the files uintp.ads and uintp.adb.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 /* Support for universal integer arithmetic */
 
@@ -94,3 +98,7 @@ extern struct Uint_Entry *uintp__uints__table;
 
 #define Udigits_Ptr uintp__udigits__table
 extern int *uintp__udigits__table;
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/urealp.h b/gcc/ada/urealp.h
index 90e5d7c65be..fbb87608133 100644
--- a/gcc/ada/urealp.h
+++ b/gcc/ada/urealp.h
@@ -6,7 +6,7 @@
  *                                                                          *
  *                              C Header File                               *
  *                                                                          *
- *            Copyright (C) 1992-2007, Free Software Foundation, Inc.       *
+ *            Copyright (C) 1992-2011, Free Software Foundation, Inc.       *
  *                                                                          *
  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  * terms of the  GNU General Public License as published  by the Free Soft- *
@@ -23,8 +23,12 @@
  *                                                                          *
  ****************************************************************************/
 
-/* This file corresponds to the Ada package specification Urealp. It was
-   created manually from the files urealp.ads and urealp.adb  */
+/* This file corresponds to the Ada package specification Urealp.  It was
+   created manually from the files urealp.ads and urealp.adb.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 /* Support for universal real arithmetic.  */
 
@@ -48,3 +52,7 @@ enum Rounding_Mode {Floor = 0, Ceiling = 1, Round = 2, Round_Even = 3};
 #define Machine eval_fat__machine
 extern Ureal Machine		(Entity_Id, Ureal, enum Rounding_Mode,
 				 Node_Id);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/gcc/ada/xeinfo.adb b/gcc/ada/xeinfo.adb
index ba9ded9d5cc..cce58315fe2 100644
--- a/gcc/ada/xeinfo.adb
+++ b/gcc/ada/xeinfo.adb
@@ -276,6 +276,10 @@ begin
 
    Put_Line (Ofile, "");
 
+   Put_Line (Ofile, "#ifdef __cplusplus");
+   Put_Line (Ofile, "extern ""C"" {");
+   Put_Line (Ofile, "#endif");
+
    --  Find and record pragma Inlines
 
    loop
@@ -492,6 +496,11 @@ begin
    end loop;
 
    Put_Line (Ofile, "");
+
+   Put_Line (Ofile, "#ifdef __cplusplus");
+   Put_Line (Ofile, "}");
+   Put_Line (Ofile, "#endif");
+
    Put_Line
      (Ofile,
       "/* End of einfo.h (C version of Einfo package specification) */");
diff --git a/gcc/ada/xsinfo.adb b/gcc/ada/xsinfo.adb
index 3bf6011ffc0..869ae873f29 100644
--- a/gcc/ada/xsinfo.adb
+++ b/gcc/ada/xsinfo.adb
@@ -162,6 +162,11 @@ begin
    end loop;
 
    Put_Line (Ofile, "");
+
+   Put_Line (Ofile, "#ifdef __cplusplus");
+   Put_Line (Ofile, "extern ""C"" {");
+   Put_Line (Ofile, "#endif");
+
    NKV := 0;
 
    --  Loop through node kind codes
@@ -248,6 +253,9 @@ exception
    when Done =>
       Close (InS);
       Put_Line (Ofile, "");
+      Put_Line (Ofile, "#ifdef __cplusplus");
+      Put_Line (Ofile, "}");
+      Put_Line (Ofile, "#endif");
       Close (Ofile);
       Set_Exit_Status (0);
 
diff --git a/gcc/ada/xsnamest.adb b/gcc/ada/xsnamest.adb
index 7dd3ca29883..d044fb1130e 100644
--- a/gcc/ada/xsnamest.adb
+++ b/gcc/ada/xsnamest.adb
@@ -194,6 +194,10 @@ begin
    Create (OutB, Out_File, "snames.nb");
    Create (OutH, Out_File, "snames.nh");
 
+   Put_Line (OutH, "#ifdef __cplusplus");
+   Put_Line (OutH, "extern ""C"" {");
+   Put_Line (OutH, "#endif");
+
    Anchored_Mode := True;
    Val := 0;
 
@@ -274,4 +278,8 @@ begin
       Line := Get_Line (InH);
       Put_Line (OutH, Line);
    end loop;
+
+   Put_Line (OutH, "#ifdef __cplusplus");
+   Put_Line (OutH, "}");
+   Put_Line (OutH, "#endif");
 end XSnamesT;
diff --git a/gcc/prefix.h b/gcc/prefix.h
index c6d9ae59701..5bafe20900d 100644
--- a/gcc/prefix.h
+++ b/gcc/prefix.h
@@ -21,10 +21,20 @@ License along with GCC; see the file COPYING3.  If not see
 #ifndef GCC_PREFIX_H
 #define GCC_PREFIX_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* These functions are called by the Ada frontend with C convention.  */
+
 /* Update PATH using KEY if PATH starts with PREFIX.  The returned
    string is always malloc-ed, and the caller is responsible for
    freeing it.  */
 extern char *update_path (const char *path, const char *key);
 extern void set_std_prefix (const char *, int);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* ! GCC_PREFIX_H */