diff mbox

Prefixes for libgcc symbols (C6X 9.5/11)

Message ID 4DCD57E7.9020909@codesourcery.com
State New
Headers show

Commit Message

Bernd Schmidt May 13, 2011, 4:10 p.m. UTC 
On 05/13/2011 04:26 PM, Joseph S. Myers wrote:
> On Fri, 13 May 2011, Bernd Schmidt wrote:
> 
>> The following patch adds a target hook and a corresponding LIBGCC2_
>> macro which control the generation of library function names. It also
>> makes libgcc-std.ver a generated file, built from libgcc-std.ver.in by
>> replacing some placeholders with the correct prefixes. While I was
>> there, I also added functionality to generate a version of this file
>> with an extra underscore for the Blackfin port.
> 
> But the linker was changed to use C symbol names in linker scripts and I 
> was told that this script in GCC would be removed in consequence.
> 
> http://sourceware.org/ml/binutils/2010-12/msg00375.html

Oh well. Dropped.

> Any new target macro for use only in target libraries should, in my view, 
> be poisoned in the host system.h from the start to ensure that no-one 
> accidentally adds definitions to the host tm.h.  This would be alongside 
> the existing
> 
> /* Target macros only used for code built for the target, that have
>    moved to libgcc-tm.h.  */
>  #pragma GCC poison DECLARE_LIBRARY_RENAMES

Done. New patch below, now testing.


Bernd
gcc/
	* libgcc2.h (__NW, __NDW): Define using a __gnu_ prefix if
	LIBGCC2_GNU_PREFIX is defined.
	(__N): New macro.
	(__powisf2, __powidf2, __powitf2, __powixf2, __bswapsi2, __bswapdi2,
	__mulsc3, __muldc3, __mulxc3, __multc3, __divsc3, __divdc3, __divxc3,
	__divtc3, __udiv_w_sdiv, __clear_cache, __enable_execute_stack,
	__clz_tab): Define using __N.
	(__absvsi2, __negvsi2, __addvsi3, __subvsi3, __mulvsi3): Likewise if
	COMPAT_SIMODE_TRAPPING_ARITHMETIC.
	* target.def (libfunc_gnu_prefix): New hook.
	* doc/tm.texi.in (LIBGCC2_GNU_PREFIX): Document.
	(TARGET_LIBFUNC_GNU_PREFIX): Add hook.
	* doc/tm.texi: Regenerate.
	* system.h (LIBGCC2_GNU_PREFIX): Poison.
	* optabs.c (gen_libfunc): Take the libfunc_gnu_prefix hook into
	account.
	(gen_interclass_conv_libfunc, gen_intraclass_conv_libfunc): Likewise.
	(init_optabs): Likewise for the bswap libfuncs.
	* tree.c (build_common_builtin_nodes): Likewise for complex multiply
	and divide.
	* config/t-slibgcc-elf-ver (SHLIB_MAPFILES): Use $$(libgcc_objdir).
	* config/t-slibgcc-sld (SHLIB_MAPFILES): Likewise.
	* libgcc-std.ver: Remove.
	* Makefile.in (srcdirify): Handle $$(libgcc_objdir).
	* config/frv/t-linux (SHLIB_MAPFILES): Use $$(libgcc_objdir) for
	libgcc-std.ver.
	* config/i386/t-linux (SHLIB_MAPFILES): Likewise.
	* config/mips/t-slibgcc-irix (SHLIB_MAPFILES): Likewise.
	* config/rs6000/t-aix43 (SHLIB_MAPFILES): Likewise.
	* config/rs6000/t-aix52 (SHLIB_MAPFILES): Likewise.
	* config/sparc/t-linux (SHLIB_MAPFILES): Likewise.
	* config/i386/t-linux (SHLIB_MAPFILES): Likewise.
	* config/i386/t-linux (SHLIB_MAPFILES): Likewise.
	* config/fixed-bit.h (FIXED_OP): Define differently depending on
	LIBGCC2_GNU_PREFIX. All uses changed not to pass leading underscores.
	(FIXED_CONVERT_OP, FIXED_CONVERT_OP2): Likewise.

	libgcc/
	* libgcc-std.ver.in: New file.
	* Makefile.in (LIBGCC_VER_GNU_PREFIX, LIBGCC_VER_SYMBOLS_PREFIX): New
	variables.
	(libgcc-std.ver): New rule.
	* config/t-gnu-prefix: New file.

Comments

H.J. Lu May 25, 2011, 1:37 p.m. UTC | #1 
On Fri, May 13, 2011 at 9:10 AM, Bernd Schmidt <bernds@codesourcery.com> wrote:
> On 05/13/2011 04:26 PM, Joseph S. Myers wrote:
>> On Fri, 13 May 2011, Bernd Schmidt wrote:
>>
>>> The following patch adds a target hook and a corresponding LIBGCC2_
>>> macro which control the generation of library function names. It also
>>> makes libgcc-std.ver a generated file, built from libgcc-std.ver.in by
>>> replacing some placeholders with the correct prefixes. While I was
>>> there, I also added functionality to generate a version of this file
>>> with an extra underscore for the Blackfin port.
>>
>> But the linker was changed to use C symbol names in linker scripts and I
>> was told that this script in GCC would be removed in consequence.
>>
>> http://sourceware.org/ml/binutils/2010-12/msg00375.html
>
> Oh well. Dropped.
>
>> Any new target macro for use only in target libraries should, in my view,
>> be poisoned in the host system.h from the start to ensure that no-one
>> accidentally adds definitions to the host tm.h.  This would be alongside
>> the existing
>>
>> /* Target macros only used for code built for the target, that have
>>    moved to libgcc-tm.h.  */
>>  #pragma GCC poison DECLARE_LIBRARY_RENAMES
>
> Done. New patch below, now testing.
>
>

I think it may have caused:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49160
Bernd Schmidt May 25, 2011, 1:42 p.m. UTC | #2 
On 05/25/2011 01:37 PM, H.J. Lu wrote:

> I think it may have caused:
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49160

Looks like it. Not quite sure how to fix it yet. Do you know what files
such as i386/64/_divtc3.c are trying to achieve?


Bernd
H.J. Lu May 25, 2011, 1:45 p.m. UTC | #3 
On Wed, May 25, 2011 at 6:42 AM, Bernd Schmidt <bernds@codesourcery.com> wrote:
> On 05/25/2011 01:37 PM, H.J. Lu wrote:
>
>> I think it may have caused:
>>
>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49160
>
> Looks like it. Not quite sure how to fix it yet. Do you know what files
> such as i386/64/_divtc3.c are trying to achieve?
>

It provides backward compatibility with symbol versioning:

[hjl@gnu-4 64]$ readelf -s /lib64/libgcc_s.so.1| grep __powitf2
    52: 0000003e8a80d170   167 FUNC    GLOBAL DEFAULT   12 __powitf2@@GCC_4.3.0
    54: 0000003e8a80d170   167 FUNC    GLOBAL DEFAULT   12 __powitf2@GCC_4.0.0
[hjl@gnu-4 64]$
diff mbox

Patch

Index: trunk/gcc/libgcc2.h
===================================================================
--- trunk.orig/gcc/libgcc2.h
+++ trunk/gcc/libgcc2.h
@@ -193,8 +193,13 @@  typedef int shift_count_type __attribute
 #define UHWtype	UDItype
 #define DWtype	TItype
 #define UDWtype	UTItype
+#ifdef LIBGCC2_GNU_PREFIX
+#define __NW(a,b)	__gnu_ ## a ## di ## b
+#define __NDW(a,b)	__gnu_ ## a ## ti ## b
+#else
 #define __NW(a,b)	__ ## a ## di ## b
 #define __NDW(a,b)	__ ## a ## ti ## b
+#endif
 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
 #elif LIBGCC2_UNITS_PER_WORD == 4
 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
@@ -204,8 +209,13 @@  typedef int shift_count_type __attribute
 #define UHWtype	USItype
 #define DWtype	DItype
 #define UDWtype	UDItype
+#ifdef LIBGCC2_GNU_PREFIX
+#define __NW(a,b)	__gnu_ ## a ## si ## b
+#define __NDW(a,b)	__gnu_ ## a ## di ## b
+#else
 #define __NW(a,b)	__ ## a ## si ## b
 #define __NDW(a,b)	__ ## a ## di ## b
+#endif
 #elif LIBGCC2_UNITS_PER_WORD == 2
 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 #define Wtype	HItype
@@ -214,8 +224,13 @@  typedef int shift_count_type __attribute
 #define UHWtype	UHItype
 #define DWtype	SItype
 #define UDWtype	USItype
+#ifdef LIBGCC2_GNU_PREFIX
+#define __NW(a,b)	__gnu_ ## a ## hi ## b
+#define __NDW(a,b)	__gnu_ ## a ## si ## b
+#else
 #define __NW(a,b)	__ ## a ## hi ## b
 #define __NDW(a,b)	__ ## a ## si ## b
+#endif
 #else
 #define W_TYPE_SIZE BITS_PER_UNIT
 #define Wtype	QItype
@@ -224,10 +239,20 @@  typedef int shift_count_type __attribute
 #define UHWtype	UQItype
 #define DWtype	HItype
 #define UDWtype	UHItype
+#ifdef LIBGCC2_GNU_PREFIX
+#define __NW(a,b)	__gnu_ ## a ## qi ## b
+#define __NDW(a,b)	__gnu_ ## a ## hi ## b
+#else
 #define __NW(a,b)	__ ## a ## qi ## b
 #define __NDW(a,b)	__ ## a ## hi ## b
 #endif
+#endif
 
+#ifdef LIBGCC2_GNU_PREFIX
+#define __N(a)	__gnu_ ## a
+#else
+#define __N(a)	__ ## a
+#endif
 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 #define Wtype_MIN (- Wtype_MAX - 1)
 
@@ -298,6 +323,25 @@  typedef int shift_count_type __attribute
 #define __popcountDI2	__NDW(popcount,2)
 #define __parityDI2	__NDW(parity,2)
 
+#define __clz_tab		__N(clz_tab)
+#define __powisf2		__N(powisf2)
+#define __powidf2		__N(powidf2)
+#define __powitf2		__N(powitf2)
+#define __powixf2		__N(powixf2)
+#define __bswapsi2		__N(bswapsi2)
+#define __bswapdi2		__N(bswapdi2)
+#define __mulsc3		__N(mulsc3)
+#define __muldc3		__N(muldc3)
+#define __mulxc3		__N(mulxc3)
+#define __multc3		__N(multc3)
+#define __divsc3		__N(divsc3)
+#define __divdc3		__N(divdc3)
+#define __divxc3		__N(divxc3)
+#define __divtc3		__N(divtc3)
+#define __udiv_w_sdiv		__N(udiv_w_sdiv)
+#define __clear_cache		__N(clear_cache)
+#define __enable_execute_stack	__N(enable_execute_stack)
+
 extern DWtype __muldi3 (DWtype, DWtype);
 extern DWtype __divdi3 (DWtype, DWtype);
 extern UDWtype __udivdi3 (UDWtype, UDWtype);
@@ -347,6 +391,12 @@  extern DWtype __mulvDI3 (DWtype, DWtype)
 extern DWtype __negvDI2 (DWtype);
 
 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
+#define __absvsi2	__N(absvsi2)
+#define __negvsi2	__N(negvsi2)
+#define __addvsi3	__N(addvsi3)
+#define __subvsi3	__N(subvsi3)
+#define __mulvsi3	__N(mulvsi3)
+
 extern SItype __absvsi2 (SItype);
 extern SItype __addvsi3 (SItype, SItype);
 extern SItype __subvsi3 (SItype, SItype);
Index: trunk/gcc/target.def
===================================================================
--- trunk.orig/gcc/target.def
+++ trunk/gcc/target.def
@@ -1258,6 +1258,16 @@  DEFHOOK
  void, (void),
  hook_void_void)
 
+ /* Add a __gnu_ prefix to library functions rather than just __.  */
+DEFHOOKPOD
+(libfunc_gnu_prefix,
+ "This hook can be used to override the default prefix given to library\n\
+routines. Normally, this is just two underscores, @code{__}, but\n\
+it if changed to true, then for example a name like @code{__gnu_muldi3}\n\
+is used instead of the default @code{__muldi3}. This applies only to\n\
+functions defined in @file{libgcc2.c}.",
+  bool, false)
+
 /* Given a decl, a section name, and whether the decl initializer
    has relocs, choose attributes for the section.  */
 /* ??? Should be merged with SELECT_SECTION and UNIQUE_SECTION.  */
Index: trunk/gcc/doc/tm.texi
===================================================================
--- trunk.orig/gcc/doc/tm.texi
+++ trunk/gcc/doc/tm.texi
@@ -1588,6 +1588,15 @@  anyway.  If you don't define this and @c
 is 128 then the default is 1, otherwise it is 0.
 @end defmac
 
+@defmac LIBGCC2_GNU_PREFIX
+This macro corresponds to the @code{TARGET_LIBFUNC_GNU_PREFIX} target
+hook and should be defined if this hook is overriden to be true.  It
+causes function names in libgcc to be changed to use a @code{__gnu_}
+prefix for their name rather than the default @code{__}.  A port which
+uses this macro should also arrange to use @file{t-gnu-prefix} in
+the libgcc @file{config.host}.
+@end defmac
+
 @defmac SF_SIZE
 @defmacx DF_SIZE
 @defmacx XF_SIZE
@@ -5260,6 +5269,14 @@  library routines.
 The default is to do nothing.  Most ports don't need to define this hook.
 @end deftypefn
 
+@deftypevr {Target Hook} bool TARGET_LIBFUNC_GNU_PREFIX
+This hook can be used to override the default prefix given to library
+routines. Normally, this is just two underscores, @code{__}, but
+it if changed to true, then for example a name like @code{__gnu_muldi3}
+is used instead of the default @code{__muldi3}. This applies only to
+functions defined in @file{libgcc2.c}.
+@end deftypevr
+
 @defmac FLOAT_LIB_COMPARE_RETURNS_BOOL (@var{mode}, @var{comparison})
 This macro should return @code{true} if the library routine that
 implements the floating point comparison operator @var{comparison} in
Index: trunk/gcc/doc/tm.texi.in
===================================================================
--- trunk.orig/gcc/doc/tm.texi.in
+++ trunk/gcc/doc/tm.texi.in
@@ -1578,6 +1578,15 @@  anyway.  If you don't define this and @c
 is 128 then the default is 1, otherwise it is 0.
 @end defmac
 
+@defmac LIBGCC2_GNU_PREFIX
+This macro corresponds to the @code{TARGET_LIBFUNC_GNU_PREFIX} target
+hook and should be defined if this hook is overriden to be true.  It
+causes function names in libgcc to be changed to use a @code{__gnu_}
+prefix for their name rather than the default @code{__}.  A port which
+uses this macro should also arrange to use @file{t-gnu-prefix} in
+the libgcc @file{config.host}.
+@end defmac
+
 @defmac SF_SIZE
 @defmacx DF_SIZE
 @defmacx XF_SIZE
@@ -5208,6 +5217,8 @@  library routines.
 The default is to do nothing.  Most ports don't need to define this hook.
 @end deftypefn
 
+@hook TARGET_LIBFUNC_GNU_PREFIX
+
 @defmac FLOAT_LIB_COMPARE_RETURNS_BOOL (@var{mode}, @var{comparison})
 This macro should return @code{true} if the library routine that
 implements the floating point comparison operator @var{comparison} in
Index: trunk/gcc/optabs.c
===================================================================
--- trunk.orig/gcc/optabs.c
+++ trunk/gcc/optabs.c
@@ -5152,13 +5152,22 @@  gen_libfunc (optab optable, const char *
   unsigned opname_len = strlen (opname);
   const char *mname = GET_MODE_NAME (mode);
   unsigned mname_len = strlen (mname);
-  char *libfunc_name = XALLOCAVEC (char, 2 + opname_len + mname_len + 1 + 1);
+  int prefix_len = targetm.libfunc_gnu_prefix ? 6 : 2;
+  int len = prefix_len + opname_len + mname_len + 1 + 1;
+  char *libfunc_name = XALLOCAVEC (char, len);
   char *p;
   const char *q;
 
   p = libfunc_name;
   *p++ = '_';
   *p++ = '_';
+  if (targetm.libfunc_gnu_prefix)
+    {
+      *p++ = 'g';
+      *p++ = 'n';
+      *p++ = 'u';
+      *p++ = '_';
+    }
   for (q = opname; *q; )
     *p++ = *q++;
   for (q = mname; *q; q++)
@@ -5362,6 +5371,7 @@  gen_interclass_conv_libfunc (convert_opt
 
   const char *fname, *tname;
   const char *q;
+  int prefix_len = targetm.libfunc_gnu_prefix ? 6 : 2;
   char *libfunc_name, *suffix;
   char *nondec_name, *dec_name, *nondec_suffix, *dec_suffix;
   char *p;
@@ -5372,11 +5382,19 @@  gen_interclass_conv_libfunc (convert_opt
 
   mname_len = strlen (GET_MODE_NAME (tmode)) + strlen (GET_MODE_NAME (fmode));
 
-  nondec_name = XALLOCAVEC (char, 2 + opname_len + mname_len + 1 + 1);
+  nondec_name = XALLOCAVEC (char, prefix_len + opname_len + mname_len + 1 + 1);
   nondec_name[0] = '_';
   nondec_name[1] = '_';
-  memcpy (&nondec_name[2], opname, opname_len);
-  nondec_suffix = nondec_name + opname_len + 2;
+  if (targetm.libfunc_gnu_prefix)
+    {
+      nondec_name[2] = 'g';
+      nondec_name[3] = 'n';
+      nondec_name[4] = 'u';
+      nondec_name[5] = '_';
+    }
+
+  memcpy (&nondec_name[prefix_len], opname, opname_len);
+  nondec_suffix = nondec_name + opname_len + prefix_len;
 
   dec_name = XALLOCAVEC (char, 2 + dec_len + opname_len + mname_len + 1 + 1);
   dec_name[0] = '_';
@@ -5487,6 +5505,7 @@  gen_intraclass_conv_libfunc (convert_opt
 
   const char *fname, *tname;
   const char *q;
+  int prefix_len = targetm.libfunc_gnu_prefix ? 6 : 2;
   char *nondec_name, *dec_name, *nondec_suffix, *dec_suffix;
   char *libfunc_name, *suffix;
   char *p;
@@ -5500,8 +5519,15 @@  gen_intraclass_conv_libfunc (convert_opt
   nondec_name = XALLOCAVEC (char, 2 + opname_len + mname_len + 1 + 1);
   nondec_name[0] = '_';
   nondec_name[1] = '_';
-  memcpy (&nondec_name[2], opname, opname_len);
-  nondec_suffix = nondec_name + opname_len + 2;
+  if (targetm.libfunc_gnu_prefix)
+    {
+      nondec_name[2] = 'g';
+      nondec_name[3] = 'n';
+      nondec_name[4] = 'u';
+      nondec_name[5] = '_';
+    }
+  memcpy (&nondec_name[prefix_len], opname, opname_len);
+  nondec_suffix = nondec_name + opname_len + prefix_len;
 
   dec_name = XALLOCAVEC (char, 2 + dec_len + opname_len + mname_len + 1 + 1);
   dec_name[0] = '_';
@@ -6231,8 +6257,16 @@  init_optabs (void)
 
   /* Explicitly initialize the bswap libfuncs since we need them to be
      valid for things other than word_mode.  */
-  set_optab_libfunc (bswap_optab, SImode, "__bswapsi2");
-  set_optab_libfunc (bswap_optab, DImode, "__bswapdi2");
+  if (targetm.libfunc_gnu_prefix)
+    {
+      set_optab_libfunc (bswap_optab, SImode, "__gnu_bswapsi2");
+      set_optab_libfunc (bswap_optab, DImode, "__gnu_bswapdi2");
+    }
+  else
+    {
+      set_optab_libfunc (bswap_optab, SImode, "__bswapsi2");
+      set_optab_libfunc (bswap_optab, DImode, "__bswapdi2");
+    }
 
   /* Use cabs for double complex abs, since systems generally have cabs.
      Don't define any libcall for float complex, so that cabs will be used.  */
Index: trunk/gcc/config/t-slibgcc-elf-ver
===================================================================
--- trunk.orig/gcc/config/t-slibgcc-elf-ver
+++ trunk/gcc/config/t-slibgcc-elf-ver
@@ -53,4 +53,4 @@  SHLIB_INSTALL = \
 	rm -f $$(DESTDIR)$$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIB_SOLINK); \
 	$(SHLIB_INSTALL_SOLINK)
 SHLIB_MKMAP = $(srcdir)/mkmap-symver.awk
-SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver
+SHLIB_MAPFILES = $$(libgcc_objdir)/libgcc-std.ver
Index: trunk/gcc/config/t-slibgcc-sld
===================================================================
--- trunk.orig/gcc/config/t-slibgcc-sld
+++ trunk/gcc/config/t-slibgcc-sld
@@ -47,4 +47,4 @@  SHLIB_INSTALL = \
 	$(LN_S) $(SHLIB_SONAME) \
 	  $$(DESTDIR)$$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIB_SOLINK)
 SHLIB_MKMAP = $(srcdir)/mkmap-symver.awk
-SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver
+SHLIB_MAPFILES = $(libgcc_objdir)/libgcc-std.ver
Index: trunk/gcc/libgcc-std.ver
===================================================================
--- trunk.orig/gcc/libgcc-std.ver
+++ /dev/null
@@ -1,1921 +0,0 @@ 
-# Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
-# 2008, 2010 Free Software Foundation, Inc.
-#
-# This file is part of GCC.
-#
-# GCC is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
-#
-# GCC is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GCC; see the file COPYING3.  If not see
-# <http://www.gnu.org/licenses/>.
-
-GCC_3.0 {
-  # libgcc1 integer symbols
-  __absvsi2
-  __addvsi3
-  __ashlsi3
-  __ashrsi3
-  __divsi3
-  __lshrsi3
-  __modsi3
-  __mulsi3
-  __mulvsi3
-  __negvsi2
-  __subvsi3
-  __udivsi3
-  __umodsi3
-
-  # libgcc1 floating point symbols
-  __addsf3
-  __adddf3
-  __addxf3
-  __addtf3
-  __divsf3
-  __divdf3
-  __divxf3
-  __divtf3
-  __eqsf2
-  __eqdf2
-  __eqxf2
-  __eqtf2
-  __extenddfxf2
-  __extenddftf2
-  __extendsfdf2
-  __extendsfxf2
-  __extendsftf2
-  __fixsfsi
-  __fixdfsi
-  __fixxfsi
-  __fixtfsi
-  __floatsisf
-  __floatsidf
-  __floatsixf
-  __floatsitf
-  __gesf2
-  __gedf2
-  __gexf2
-  __getf2
-  __gtsf2
-  __gtdf2
-  __gtxf2
-  __gttf2
-  __lesf2
-  __ledf2
-  __lexf2
-  __letf2
-  __ltsf2
-  __ltdf2
-  __ltxf2
-  __lttf2
-  __mulsf3
-  __muldf3
-  __mulxf3
-  __multf3
-  __negsf2
-  __negdf2
-  __negxf2
-  __negtf2
-  __nesf2
-  __nedf2
-  __nexf2
-  __netf2
-  __subsf3
-  __subdf3
-  __subxf3
-  __subtf3
-  __truncdfsf2
-  __truncxfsf2
-  __trunctfsf2
-  __truncxfdf2
-  __trunctfdf2
-
-  # libgcc2 DImode arithmetic (for 32-bit targets).
-  __absvdi2
-  __addvdi3
-  __ashldi3
-  __ashrdi3
-  __cmpdi2
-  __divdi3
-  __ffsdi2
-  __fixdfdi
-  __fixsfdi
-  __fixtfdi
-  __fixxfdi
-  __fixunsdfdi
-  __fixunsdfsi
-  __fixunssfsi
-  __fixunssfdi
-  __fixunstfdi
-  __fixunstfsi
-  __fixunsxfdi
-  __fixunsxfsi
-  __floatdidf
-  __floatdisf
-  __floatdixf
-  __floatditf
-  __lshrdi3
-  __moddi3
-  __muldi3
-  __mulvdi3
-  __negdi2
-  __negvdi2
-  __subvdi3
-  __ucmpdi2
-  __udivdi3
-  __udivmoddi4
-  __umoddi3
-
-  # libgcc2 TImode arithmetic (for 64-bit targets).
-  __ashlti3
-  __ashrti3
-  __cmpti2
-  __divti3
-  __ffsti2
-  __fixdfti
-  __fixsfti
-  __fixtfti
-  __fixxfti
-  __lshrti3
-  __modti3
-  __multi3
-  __negti2
-  __ucmpti2
-  __udivmodti4
-  __udivti3
-  __umodti3
-  __fixunsdfti
-  __fixunssfti
-  __fixunstfti
-  __fixunsxfti
-  __floattidf
-  __floattisf
-  __floattixf
-  __floattitf
-
-  # Used to deal with trampoline initialization on some platforms
-  __clear_cache
-
-  # EH symbols
-  _Unwind_DeleteException
-  _Unwind_Find_FDE
-  _Unwind_ForcedUnwind
-  _Unwind_GetGR
-  _Unwind_GetIP
-  _Unwind_GetLanguageSpecificData
-  _Unwind_GetRegionStart
-  _Unwind_GetTextRelBase
-  _Unwind_GetDataRelBase
-  _Unwind_RaiseException
-  _Unwind_Resume
-  _Unwind_SetGR
-  _Unwind_SetIP
-  __deregister_frame
-  __deregister_frame_info
-  __deregister_frame_info_bases
-  __register_frame
-  __register_frame_info
-  __register_frame_info_bases
-  __register_frame_info_table
-  __register_frame_info_table_bases
-  __register_frame_table
-
-  # SjLj EH symbols
-  _Unwind_SjLj_Register
-  _Unwind_SjLj_Unregister
-  _Unwind_SjLj_RaiseException
-  _Unwind_SjLj_ForcedUnwind
-  _Unwind_SjLj_Resume
-}
-
-%inherit GCC_3.3 GCC_3.0
-GCC_3.3 {
-  _Unwind_FindEnclosingFunction
-  _Unwind_GetCFA
-  _Unwind_Backtrace
-  _Unwind_Resume_or_Rethrow
-  _Unwind_SjLj_Resume_or_Rethrow
-}
-
-%inherit GCC_3.3.1 GCC_3.3
-GCC_3.3.1 {
-  __gcc_personality_sj0
-  __gcc_personality_v0
-}
-
-%inherit GCC_3.3.2 GCC_3.3.1
-GCC_3.3.2 {
-}
-
-%inherit GCC_3.3.4 GCC_3.3.2
-GCC_3.3.4 {
-  __unorddf2
-  __unordsf2
-}
-
-%inherit GCC_3.4 GCC_3.3.4
-GCC_3.4 {
-  # bit scanning and counting built-ins
-  __clzsi2
-  __clzdi2
-  __clzti2
-  __ctzsi2
-  __ctzdi2
-  __ctzti2
-  __popcountsi2
-  __popcountdi2
-  __popcountti2
-  __paritysi2
-  __paritydi2
-  __parityti2
-}
-
-%inherit GCC_3.4.2 GCC_3.4
-GCC_3.4.2 {
-  # Used to deal with trampoline initialization on some platforms
-  __enable_execute_stack
-  __trampoline_setup
-}
-
-%inherit GCC_3.4.4 GCC_3.4.2
-GCC_3.4.4 {
-  # libgcc2 TImode arithmetic (for 64-bit targets).
-  __absvti2
-  __addvti3
-  __mulvti3
-  __negvti2
-  __subvti3
-}
-
-%inherit GCC_4.0.0 GCC_3.4.4
-GCC_4.0.0 {
-  # libgcc2 __builtin_powi helpers.
-  __powisf2
-  __powidf2
-  __powixf2
-  __powitf2
-
-  # c99 compliant complex arithmetic
-  __divsc3
-  __divdc3
-  __divxc3
-  __divtc3
-  __mulsc3
-  __muldc3
-  __mulxc3
-  __multc3
-}
-
-%inherit GCC_4.1.0 GCC_4.0.0
-GCC_4.1.0 {
-}
-
-%inherit GCC_4.2.0 GCC_4.1.0
-GCC_4.2.0 {
-  # unsigned-to-floating conversions
-  __floatunsisf
-  __floatunsidf
-  __floatunsixf
-  __floatunsitf
-  __floatundidf
-  __floatundisf
-  __floatundixf
-  __floatunditf
-  __floatuntidf
-  __floatuntisf
-  __floatuntixf
-  __floatuntitf
-  _Unwind_GetIPInfo
-}
-
-%inherit GCC_4.3.0 GCC_4.2.0
-GCC_4.3.0 {
-  # byte swapping routines
-  __bswapsi2
-  __bswapdi2
-  __emutls_get_address
-  __emutls_register_common
-  __ffssi2
-  __extendxftf2
-  __trunctfxf2
-
-  # fixed-point routines
-  __addqq3
-  __addhq3
-  __addsq3
-  __adddq3
-  __addtq3
-  __adduqq3
-  __adduhq3
-  __addusq3
-  __addudq3
-  __addutq3
-  __addha3
-  __addsa3
-  __addda3
-  __addta3
-  __adduha3
-  __addusa3
-  __adduda3
-  __adduta3
-  __ssaddqq3
-  __ssaddhq3
-  __ssaddsq3
-  __ssadddq3
-  __ssaddtq3
-  __ssaddha3
-  __ssaddsa3
-  __ssaddda3
-  __ssaddta3
-  __usadduqq3
-  __usadduhq3
-  __usaddusq3
-  __usaddudq3
-  __usaddutq3
-  __usadduha3
-  __usaddusa3
-  __usadduda3
-  __usadduta3
-  __subqq3
-  __subhq3
-  __subsq3
-  __subdq3
-  __subtq3
-  __subuqq3
-  __subuhq3
-  __subusq3
-  __subudq3
-  __subutq3
-  __subha3
-  __subsa3
-  __subda3
-  __subta3
-  __subuha3
-  __subusa3
-  __subuda3
-  __subuta3
-  __sssubqq3
-  __sssubhq3
-  __sssubsq3
-  __sssubdq3
-  __sssubtq3
-  __sssubha3
-  __sssubsa3
-  __sssubda3
-  __sssubta3
-  __ussubuqq3
-  __ussubuhq3
-  __ussubusq3
-  __ussubudq3
-  __ussubutq3
-  __ussubuha3
-  __ussubusa3
-  __ussubuda3
-  __ussubuta3
-  __mulqq3
-  __mulhq3
-  __mulsq3
-  __muldq3
-  __multq3
-  __muluqq3
-  __muluhq3
-  __mulusq3
-  __muludq3
-  __mulutq3
-  __mulha3
-  __mulsa3
-  __mulda3
-  __multa3
-  __muluha3
-  __mulusa3
-  __muluda3
-  __muluta3
-  __ssmulqq3
-  __ssmulhq3
-  __ssmulsq3
-  __ssmuldq3
-  __ssmultq3
-  __ssmulha3
-  __ssmulsa3
-  __ssmulda3
-  __ssmulta3
-  __usmuluqq3
-  __usmuluhq3
-  __usmulusq3
-  __usmuludq3
-  __usmulutq3
-  __usmuluha3
-  __usmulusa3
-  __usmuluda3
-  __usmuluta3
-  __divqq3
-  __divhq3
-  __divsq3
-  __divdq3
-  __divtq3
-  __divha3
-  __divsa3
-  __divda3
-  __divta3
-  __udivuqq3
-  __udivuhq3
-  __udivusq3
-  __udivudq3
-  __udivutq3
-  __udivuha3
-  __udivusa3
-  __udivuda3
-  __udivuta3
-  __ssdivqq3
-  __ssdivhq3
-  __ssdivsq3
-  __ssdivdq3
-  __ssdivtq3
-  __ssdivha3
-  __ssdivsa3
-  __ssdivda3
-  __ssdivta3
-  __usdivuqq3
-  __usdivuhq3
-  __usdivusq3
-  __usdivudq3
-  __usdivutq3
-  __usdivuha3
-  __usdivusa3
-  __usdivuda3
-  __usdivuta3
-  __negqq2
-  __neghq2
-  __negsq2
-  __negdq2
-  __negtq2
-  __neguqq2
-  __neguhq2
-  __negusq2
-  __negudq2
-  __negutq2
-  __negha2
-  __negsa2
-  __negda2
-  __negta2
-  __neguha2
-  __negusa2
-  __neguda2
-  __neguta2
-  __ssnegqq2
-  __ssneghq2
-  __ssnegsq2
-  __ssnegdq2
-  __ssnegtq2
-  __ssnegha2
-  __ssnegsa2
-  __ssnegda2
-  __ssnegta2
-  __usneguqq2
-  __usneguhq2
-  __usnegusq2
-  __usnegudq2
-  __usnegutq2
-  __usneguha2
-  __usnegusa2
-  __usneguda2
-  __usneguta2
-  __ashlqq3
-  __ashlhq3
-  __ashlsq3
-  __ashldq3
-  __ashltq3
-  __ashluqq3
-  __ashluhq3
-  __ashlusq3
-  __ashludq3
-  __ashlutq3
-  __ashlha3
-  __ashlsa3
-  __ashlda3
-  __ashlta3
-  __ashluha3
-  __ashlusa3
-  __ashluda3
-  __ashluta3
-  __ashrqq3
-  __ashrhq3
-  __ashrsq3
-  __ashrdq3
-  __ashrtq3
-  __ashrha3
-  __ashrsa3
-  __ashrda3
-  __ashrta3
-  __lshruqq3
-  __lshruhq3
-  __lshrusq3
-  __lshrudq3
-  __lshrutq3
-  __lshruha3
-  __lshrusa3
-  __lshruda3
-  __lshruta3
-  __ssashlqq3
-  __ssashlhq3
-  __ssashlsq3
-  __ssashldq3
-  __ssashltq3
-  __ssashlha3
-  __ssashlsa3
-  __ssashlda3
-  __ssashlta3
-  __usashluqq3
-  __usashluhq3
-  __usashlusq3
-  __usashludq3
-  __usashlutq3
-  __usashluha3
-  __usashlusa3
-  __usashluda3
-  __usashluta3
-  __cmpqq2
-  __cmphq2
-  __cmpsq2
-  __cmpdq2
-  __cmptq2
-  __cmpuqq2
-  __cmpuhq2
-  __cmpusq2
-  __cmpudq2
-  __cmputq2
-  __cmpha2
-  __cmpsa2
-  __cmpda2
-  __cmpta2
-  __cmpuha2
-  __cmpusa2
-  __cmpuda2
-  __cmputa2
-  __fractqqhq2
-  __fractqqsq2
-  __fractqqdq2
-  __fractqqtq2
-  __fractqqha
-  __fractqqsa
-  __fractqqda
-  __fractqqta
-  __fractqquqq
-  __fractqquhq
-  __fractqqusq
-  __fractqqudq
-  __fractqqutq
-  __fractqquha
-  __fractqqusa
-  __fractqquda
-  __fractqquta
-  __fractqqqi
-  __fractqqhi
-  __fractqqsi
-  __fractqqdi
-  __fractqqti
-  __fractqqsf
-  __fractqqdf
-  __fracthqqq2
-  __fracthqsq2
-  __fracthqdq2
-  __fracthqtq2
-  __fracthqha
-  __fracthqsa
-  __fracthqda
-  __fracthqta
-  __fracthquqq
-  __fracthquhq
-  __fracthqusq
-  __fracthqudq
-  __fracthqutq
-  __fracthquha
-  __fracthqusa
-  __fracthquda
-  __fracthquta
-  __fracthqqi
-  __fracthqhi
-  __fracthqsi
-  __fracthqdi
-  __fracthqti
-  __fracthqsf
-  __fracthqdf
-  __fractsqqq2
-  __fractsqhq2
-  __fractsqdq2
-  __fractsqtq2
-  __fractsqha
-  __fractsqsa
-  __fractsqda
-  __fractsqta
-  __fractsquqq
-  __fractsquhq
-  __fractsqusq
-  __fractsqudq
-  __fractsqutq
-  __fractsquha
-  __fractsqusa
-  __fractsquda
-  __fractsquta
-  __fractsqqi
-  __fractsqhi
-  __fractsqsi
-  __fractsqdi
-  __fractsqti
-  __fractsqsf
-  __fractsqdf
-  __fractdqqq2
-  __fractdqhq2
-  __fractdqsq2
-  __fractdqtq2
-  __fractdqha
-  __fractdqsa
-  __fractdqda
-  __fractdqta
-  __fractdquqq
-  __fractdquhq
-  __fractdqusq
-  __fractdqudq
-  __fractdqutq
-  __fractdquha
-  __fractdqusa
-  __fractdquda
-  __fractdquta
-  __fractdqqi
-  __fractdqhi
-  __fractdqsi
-  __fractdqdi
-  __fractdqti
-  __fractdqsf
-  __fractdqdf
-  __fracttqqq2
-  __fracttqhq2
-  __fracttqsq2
-  __fracttqdq2
-  __fracttqha
-  __fracttqsa
-  __fracttqda
-  __fracttqta
-  __fracttquqq
-  __fracttquhq
-  __fracttqusq
-  __fracttqudq
-  __fracttqutq
-  __fracttquha
-  __fracttqusa
-  __fracttquda
-  __fracttquta
-  __fracttqqi
-  __fracttqhi
-  __fracttqsi
-  __fracttqdi
-  __fracttqti
-  __fracttqsf
-  __fracttqdf
-  __fracthaqq
-  __fracthahq
-  __fracthasq
-  __fracthadq
-  __fracthatq
-  __fracthasa2
-  __fracthada2
-  __fracthata2
-  __fracthauqq
-  __fracthauhq
-  __fracthausq
-  __fracthaudq
-  __fracthautq
-  __fracthauha
-  __fracthausa
-  __fracthauda
-  __fracthauta
-  __fracthaqi
-  __fracthahi
-  __fracthasi
-  __fracthadi
-  __fracthati
-  __fracthasf
-  __fracthadf
-  __fractsaqq
-  __fractsahq
-  __fractsasq
-  __fractsadq
-  __fractsatq
-  __fractsaha2
-  __fractsada2
-  __fractsata2
-  __fractsauqq
-  __fractsauhq
-  __fractsausq
-  __fractsaudq
-  __fractsautq
-  __fractsauha
-  __fractsausa
-  __fractsauda
-  __fractsauta
-  __fractsaqi
-  __fractsahi
-  __fractsasi
-  __fractsadi
-  __fractsati
-  __fractsasf
-  __fractsadf
-  __fractdaqq
-  __fractdahq
-  __fractdasq
-  __fractdadq
-  __fractdatq
-  __fractdaha2
-  __fractdasa2
-  __fractdata2
-  __fractdauqq
-  __fractdauhq
-  __fractdausq
-  __fractdaudq
-  __fractdautq
-  __fractdauha
-  __fractdausa
-  __fractdauda
-  __fractdauta
-  __fractdaqi
-  __fractdahi
-  __fractdasi
-  __fractdadi
-  __fractdati
-  __fractdasf
-  __fractdadf
-  __fracttaqq
-  __fracttahq
-  __fracttasq
-  __fracttadq
-  __fracttatq
-  __fracttaha2
-  __fracttasa2
-  __fracttada2
-  __fracttauqq
-  __fracttauhq
-  __fracttausq
-  __fracttaudq
-  __fracttautq
-  __fracttauha
-  __fracttausa
-  __fracttauda
-  __fracttauta
-  __fracttaqi
-  __fracttahi
-  __fracttasi
-  __fracttadi
-  __fracttati
-  __fracttasf
-  __fracttadf
-  __fractuqqqq
-  __fractuqqhq
-  __fractuqqsq
-  __fractuqqdq
-  __fractuqqtq
-  __fractuqqha
-  __fractuqqsa
-  __fractuqqda
-  __fractuqqta
-  __fractuqquhq2
-  __fractuqqusq2
-  __fractuqqudq2
-  __fractuqqutq2
-  __fractuqquha
-  __fractuqqusa
-  __fractuqquda
-  __fractuqquta
-  __fractuqqqi
-  __fractuqqhi
-  __fractuqqsi
-  __fractuqqdi
-  __fractuqqti
-  __fractuqqsf
-  __fractuqqdf
-  __fractuhqqq
-  __fractuhqhq
-  __fractuhqsq
-  __fractuhqdq
-  __fractuhqtq
-  __fractuhqha
-  __fractuhqsa
-  __fractuhqda
-  __fractuhqta
-  __fractuhquqq2
-  __fractuhqusq2
-  __fractuhqudq2
-  __fractuhqutq2
-  __fractuhquha
-  __fractuhqusa
-  __fractuhquda
-  __fractuhquta
-  __fractuhqqi
-  __fractuhqhi
-  __fractuhqsi
-  __fractuhqdi
-  __fractuhqti
-  __fractuhqsf
-  __fractuhqdf
-  __fractusqqq
-  __fractusqhq
-  __fractusqsq
-  __fractusqdq
-  __fractusqtq
-  __fractusqha
-  __fractusqsa
-  __fractusqda
-  __fractusqta
-  __fractusquqq2
-  __fractusquhq2
-  __fractusqudq2
-  __fractusqutq2
-  __fractusquha
-  __fractusqusa
-  __fractusquda
-  __fractusquta
-  __fractusqqi
-  __fractusqhi
-  __fractusqsi
-  __fractusqdi
-  __fractusqti
-  __fractusqsf
-  __fractusqdf
-  __fractudqqq
-  __fractudqhq
-  __fractudqsq
-  __fractudqdq
-  __fractudqtq
-  __fractudqha
-  __fractudqsa
-  __fractudqda
-  __fractudqta
-  __fractudquqq2
-  __fractudquhq2
-  __fractudqusq2
-  __fractudqutq2
-  __fractudquha
-  __fractudqusa
-  __fractudquda
-  __fractudquta
-  __fractudqqi
-  __fractudqhi
-  __fractudqsi
-  __fractudqdi
-  __fractudqti
-  __fractudqsf
-  __fractudqdf
-  __fractutqqq
-  __fractutqhq
-  __fractutqsq
-  __fractutqdq
-  __fractutqtq
-  __fractutqha
-  __fractutqsa
-  __fractutqda
-  __fractutqta
-  __fractutquqq2
-  __fractutquhq2
-  __fractutqusq2
-  __fractutqudq2
-  __fractutquha
-  __fractutqusa
-  __fractutquda
-  __fractutquta
-  __fractutqqi
-  __fractutqhi
-  __fractutqsi
-  __fractutqdi
-  __fractutqti
-  __fractutqsf
-  __fractutqdf
-  __fractuhaqq
-  __fractuhahq
-  __fractuhasq
-  __fractuhadq
-  __fractuhatq
-  __fractuhaha
-  __fractuhasa
-  __fractuhada
-  __fractuhata
-  __fractuhauqq
-  __fractuhauhq
-  __fractuhausq
-  __fractuhaudq
-  __fractuhautq
-  __fractuhausa2
-  __fractuhauda2
-  __fractuhauta2
-  __fractuhaqi
-  __fractuhahi
-  __fractuhasi
-  __fractuhadi
-  __fractuhati
-  __fractuhasf
-  __fractuhadf
-  __fractusaqq
-  __fractusahq
-  __fractusasq
-  __fractusadq
-  __fractusatq
-  __fractusaha
-  __fractusasa
-  __fractusada
-  __fractusata
-  __fractusauqq
-  __fractusauhq
-  __fractusausq
-  __fractusaudq
-  __fractusautq
-  __fractusauha2
-  __fractusauda2
-  __fractusauta2
-  __fractusaqi
-  __fractusahi
-  __fractusasi
-  __fractusadi
-  __fractusati
-  __fractusasf
-  __fractusadf
-  __fractudaqq
-  __fractudahq
-  __fractudasq
-  __fractudadq
-  __fractudatq
-  __fractudaha
-  __fractudasa
-  __fractudada
-  __fractudata
-  __fractudauqq
-  __fractudauhq
-  __fractudausq
-  __fractudaudq
-  __fractudautq
-  __fractudauha2
-  __fractudausa2
-  __fractudauta2
-  __fractudaqi
-  __fractudahi
-  __fractudasi
-  __fractudadi
-  __fractudati
-  __fractudasf
-  __fractudadf
-  __fractutaqq
-  __fractutahq
-  __fractutasq
-  __fractutadq
-  __fractutatq
-  __fractutaha
-  __fractutasa
-  __fractutada
-  __fractutata
-  __fractutauqq
-  __fractutauhq
-  __fractutausq
-  __fractutaudq
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-  __satfractunshisq
-  __satfractunshidq
-  __satfractunshitq
-  __satfractunshiha
-  __satfractunshisa
-  __satfractunshida
-  __satfractunshita
-  __satfractunshiuqq
-  __satfractunshiuhq
-  __satfractunshiusq
-  __satfractunshiudq
-  __satfractunshiutq
-  __satfractunshiuha
-  __satfractunshiusa
-  __satfractunshiuda
-  __satfractunshiuta
-  __satfractunssiqq
-  __satfractunssihq
-  __satfractunssisq
-  __satfractunssidq
-  __satfractunssitq
-  __satfractunssiha
-  __satfractunssisa
-  __satfractunssida
-  __satfractunssita
-  __satfractunssiuqq
-  __satfractunssiuhq
-  __satfractunssiusq
-  __satfractunssiudq
-  __satfractunssiutq
-  __satfractunssiuha
-  __satfractunssiusa
-  __satfractunssiuda
-  __satfractunssiuta
-  __satfractunsdiqq
-  __satfractunsdihq
-  __satfractunsdisq
-  __satfractunsdidq
-  __satfractunsditq
-  __satfractunsdiha
-  __satfractunsdisa
-  __satfractunsdida
-  __satfractunsdita
-  __satfractunsdiuqq
-  __satfractunsdiuhq
-  __satfractunsdiusq
-  __satfractunsdiudq
-  __satfractunsdiutq
-  __satfractunsdiuha
-  __satfractunsdiusa
-  __satfractunsdiuda
-  __satfractunsdiuta
-  __satfractunstiqq
-  __satfractunstihq
-  __satfractunstisq
-  __satfractunstidq
-  __satfractunstitq
-  __satfractunstiha
-  __satfractunstisa
-  __satfractunstida
-  __satfractunstita
-  __satfractunstiuqq
-  __satfractunstiuhq
-  __satfractunstiusq
-  __satfractunstiudq
-  __satfractunstiutq
-  __satfractunstiuha
-  __satfractunstiusa
-  __satfractunstiuda
-  __satfractunstiuta
-}
-
-%inherit GCC_4.4.0 GCC_4.3.0
-GCC_4.4.0 {
-  __sync_fetch_and_add_1
-  __sync_fetch_and_sub_1
-  __sync_fetch_and_or_1
-  __sync_fetch_and_and_1
-  __sync_fetch_and_xor_1
-  __sync_fetch_and_nand_1
-  __sync_add_and_fetch_1
-  __sync_sub_and_fetch_1
-  __sync_or_and_fetch_1
-  __sync_and_and_fetch_1
-  __sync_xor_and_fetch_1
-  __sync_nand_and_fetch_1
-  __sync_bool_compare_and_swap_1
-  __sync_val_compare_and_swap_1
-  __sync_lock_test_and_set_1
-
-  __sync_fetch_and_add_2
-  __sync_fetch_and_sub_2
-  __sync_fetch_and_or_2
-  __sync_fetch_and_and_2
-  __sync_fetch_and_xor_2
-  __sync_fetch_and_nand_2
-  __sync_add_and_fetch_2
-  __sync_sub_and_fetch_2
-  __sync_or_and_fetch_2
-  __sync_and_and_fetch_2
-  __sync_xor_and_fetch_2
-  __sync_nand_and_fetch_2
-  __sync_bool_compare_and_swap_2
-  __sync_val_compare_and_swap_2
-  __sync_lock_test_and_set_2
-
-  __sync_fetch_and_add_4
-  __sync_fetch_and_sub_4
-  __sync_fetch_and_or_4
-  __sync_fetch_and_and_4
-  __sync_fetch_and_xor_4
-  __sync_fetch_and_nand_4
-  __sync_add_and_fetch_4
-  __sync_sub_and_fetch_4
-  __sync_or_and_fetch_4
-  __sync_and_and_fetch_4
-  __sync_xor_and_fetch_4
-  __sync_nand_and_fetch_4
-  __sync_bool_compare_and_swap_4
-  __sync_val_compare_and_swap_4
-  __sync_lock_test_and_set_4
-
-  __sync_fetch_and_add_8
-  __sync_fetch_and_sub_8
-  __sync_fetch_and_or_8
-  __sync_fetch_and_and_8
-  __sync_fetch_and_xor_8
-  __sync_fetch_and_nand_8
-  __sync_add_and_fetch_8
-  __sync_sub_and_fetch_8
-  __sync_or_and_fetch_8
-  __sync_and_and_fetch_8
-  __sync_xor_and_fetch_8
-  __sync_nand_and_fetch_8
-  __sync_bool_compare_and_swap_8
-  __sync_val_compare_and_swap_8
-  __sync_lock_test_and_set_8
-
-  __sync_fetch_and_add_16
-  __sync_fetch_and_sub_16
-  __sync_fetch_and_or_16
-  __sync_fetch_and_and_16
-  __sync_fetch_and_xor_16
-  __sync_fetch_and_nand_16
-  __sync_add_and_fetch_16
-  __sync_sub_and_fetch_16
-  __sync_or_and_fetch_16
-  __sync_and_and_fetch_16
-  __sync_xor_and_fetch_16
-  __sync_nand_and_fetch_16
-  __sync_bool_compare_and_swap_16
-  __sync_val_compare_and_swap_16
-  __sync_lock_test_and_set_16
-
-  __sync_synchronize
-}
-
-%inherit GCC_4.5.0 GCC_4.4.0
-GCC_4.5.0 {
-  __unordxf2
-  __unordtf2
-}
-
-%inherit GCC_4.6.0 GCC_4.5.0
-GCC_4.6.0 {
-  __morestack_segments
-  __morestack_current_segment
-  __morestack_initial_sp
-  __splitstack_find
-}
Index: trunk/libgcc/libgcc-std.ver.in
===================================================================
--- /dev/null
+++ trunk/libgcc/libgcc-std.ver.in
@@ -0,0 +1,1922 @@ 
+# Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
+# 2008, 2010 Free Software Foundation, Inc.
+#
+# This file is part of GCC.
+#
+# GCC is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GCC is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3.  If not see
+# <http://www.gnu.org/licenses/>.
+
+GCC_3.0 {
+  # libgcc1 integer symbols
+  __PFX__absvsi2
+  __PFX__addvsi3
+  __PFX__ashlsi3
+  __PFX__ashrsi3
+  __PFX__divsi3
+  __PFX__lshrsi3
+  __PFX__modsi3
+  __PFX__mulsi3
+  __PFX__mulvsi3
+  __PFX__negvsi2
+  __PFX__subvsi3
+  __PFX__udivsi3
+  __PFX__umodsi3
+
+  # libgcc1 floating point symbols
+  __PFX__addsf3
+  __PFX__adddf3
+  __PFX__addxf3
+  __PFX__addtf3
+  __PFX__divsf3
+  __PFX__divdf3
+  __PFX__divxf3
+  __PFX__divtf3
+  __PFX__eqsf2
+  __PFX__eqdf2
+  __PFX__eqxf2
+  __PFX__eqtf2
+  __PFX__extenddfxf2
+  __PFX__extenddftf2
+  __PFX__extendsfdf2
+  __PFX__extendsfxf2
+  __PFX__extendsftf2
+  __PFX__fixsfsi
+  __PFX__fixdfsi
+  __PFX__fixxfsi
+  __PFX__fixtfsi
+  __PFX__floatsisf
+  __PFX__floatsidf
+  __PFX__floatsixf
+  __PFX__floatsitf
+  __PFX__gesf2
+  __PFX__gedf2
+  __PFX__gexf2
+  __PFX__getf2
+  __PFX__gtsf2
+  __PFX__gtdf2
+  __PFX__gtxf2
+  __PFX__gttf2
+  __PFX__lesf2
+  __PFX__ledf2
+  __PFX__lexf2
+  __PFX__letf2
+  __PFX__ltsf2
+  __PFX__ltdf2
+  __PFX__ltxf2
+  __PFX__lttf2
+  __PFX__mulsf3
+  __PFX__muldf3
+  __PFX__mulxf3
+  __PFX__multf3
+  __PFX__negsf2
+  __PFX__negdf2
+  __PFX__negxf2
+  __PFX__negtf2
+  __PFX__nesf2
+  __PFX__nedf2
+  __PFX__nexf2
+  __PFX__netf2
+  __PFX__subsf3
+  __PFX__subdf3
+  __PFX__subxf3
+  __PFX__subtf3
+  __PFX__truncdfsf2
+  __PFX__truncxfsf2
+  __PFX__trunctfsf2
+  __PFX__truncxfdf2
+  __PFX__trunctfdf2
+
+  # libgcc2 DImode arithmetic (for 32-bit targets).
+  __PFX__absvdi2
+  __PFX__addvdi3
+  __PFX__ashldi3
+  __PFX__ashrdi3
+  __PFX__cmpdi2
+  __PFX__divdi3
+  __PFX__ffsdi2
+  __PFX__fixdfdi
+  __PFX__fixsfdi
+  __PFX__fixtfdi
+  __PFX__fixxfdi
+  __PFX__fixunsdfdi
+  __PFX__fixunsdfsi
+  __PFX__fixunssfsi
+  __PFX__fixunssfdi
+  __PFX__fixunstfdi
+  __PFX__fixunstfsi
+  __PFX__fixunsxfdi
+  __PFX__fixunsxfsi
+  __PFX__floatdidf
+  __PFX__floatdisf
+  __PFX__floatdixf
+  __PFX__floatditf
+  __PFX__lshrdi3
+  __PFX__moddi3
+  __PFX__muldi3
+  __PFX__mulvdi3
+  __PFX__negdi2
+  __PFX__negvdi2
+  __PFX__subvdi3
+  __PFX__ucmpdi2
+  __PFX__udivdi3
+  __PFX__udivmoddi4
+  __PFX__umoddi3
+
+  # libgcc2 TImode arithmetic (for 64-bit targets).
+  __PFX__ashlti3
+  __PFX__ashrti3
+  __PFX__cmpti2
+  __PFX__divti3
+  __PFX__ffsti2
+  __PFX__fixdfti
+  __PFX__fixsfti
+  __PFX__fixtfti
+  __PFX__fixxfti
+  __PFX__lshrti3
+  __PFX__modti3
+  __PFX__multi3
+  __PFX__negti2
+  __PFX__ucmpti2
+  __PFX__udivmodti4
+  __PFX__udivti3
+  __PFX__umodti3
+  __PFX__fixunsdfti
+  __PFX__fixunssfti
+  __PFX__fixunstfti
+  __PFX__fixunsxfti
+  __PFX__floattidf
+  __PFX__floattisf
+  __PFX__floattixf
+  __PFX__floattitf
+
+  # Used to deal with trampoline initialization on some platforms
+  __PFX__clear_cache
+
+  # EH symbols
+  _Unwind_DeleteException
+  _Unwind_Find_FDE
+  _Unwind_ForcedUnwind
+  _Unwind_GetGR
+  _Unwind_GetIP
+  _Unwind_GetLanguageSpecificData
+  _Unwind_GetRegionStart
+  _Unwind_GetTextRelBase
+  _Unwind_GetDataRelBase
+  _Unwind_RaiseException
+  _Unwind_Resume
+  _Unwind_SetGR
+  _Unwind_SetIP
+  __deregister_frame
+  __deregister_frame_info
+  __deregister_frame_info_bases
+  __register_frame
+  __register_frame_info
+  __register_frame_info_bases
+  __register_frame_info_table
+  __register_frame_info_table_bases
+  __register_frame_table
+
+  # SjLj EH symbols
+  _Unwind_SjLj_Register
+  _Unwind_SjLj_Unregister
+  _Unwind_SjLj_RaiseException
+  _Unwind_SjLj_ForcedUnwind
+  _Unwind_SjLj_Resume
+}
+
+%inherit GCC_3.3 GCC_3.0
+GCC_3.3 {
+  _Unwind_FindEnclosingFunction
+  _Unwind_GetCFA
+  _Unwind_Backtrace
+  _Unwind_Resume_or_Rethrow
+  _Unwind_SjLj_Resume_or_Rethrow
+}
+
+%inherit GCC_3.3.1 GCC_3.3
+GCC_3.3.1 {
+  __gcc_personality_sj0
+  __gcc_personality_v0
+}
+
+%inherit GCC_3.3.2 GCC_3.3.1
+GCC_3.3.2 {
+}
+
+%inherit GCC_3.3.4 GCC_3.3.2
+GCC_3.3.4 {
+  __PFX__unorddf2
+  __PFX__unordsf2
+}
+
+%inherit GCC_3.4 GCC_3.3.4
+GCC_3.4 {
+  # bit scanning and counting built-ins
+  __PFX__clzsi2
+  __PFX__clzdi2
+  __PFX__clzti2
+  __PFX__ctzsi2
+  __PFX__ctzdi2
+  __PFX__ctzti2
+  __PFX__popcountsi2
+  __PFX__popcountdi2
+  __PFX__popcountti2
+  __PFX__paritysi2
+  __PFX__paritydi2
+  __PFX__parityti2
+}
+
+%inherit GCC_3.4.2 GCC_3.4
+GCC_3.4.2 {
+  # Used to deal with trampoline initialization on some platforms
+  __PFX__enable_execute_stack
+  __trampoline_setup
+}
+
+%inherit GCC_3.4.4 GCC_3.4.2
+GCC_3.4.4 {
+  # libgcc2 TImode arithmetic (for 64-bit targets).
+  __PFX__absvti2
+  __PFX__addvti3
+  __PFX__mulvti3
+  __PFX__negvti2
+  __PFX__subvti3
+}
+
+%inherit GCC_4.0.0 GCC_3.4.4
+GCC_4.0.0 {
+  # libgcc2 __builtin_powi helpers.
+  __PFX__powisf2
+  __PFX__powidf2
+  __PFX__powixf2
+  __PFX__powitf2
+
+  # c99 compliant complex arithmetic
+  __PFX__divsc3
+  __PFX__divdc3
+  __PFX__divxc3
+  __PFX__divtc3
+  __PFX__mulsc3
+  __PFX__muldc3
+  __PFX__mulxc3
+  __PFX__multc3
+}
+
+%inherit GCC_4.1.0 GCC_4.0.0
+GCC_4.1.0 {
+}
+
+%inherit GCC_4.2.0 GCC_4.1.0
+GCC_4.2.0 {
+  # unsigned-to-floating conversions
+  __PFX__floatunsisf
+  __PFX__floatunsidf
+  __PFX__floatunsixf
+  __PFX__floatunsitf
+  __PFX__floatundidf
+  __PFX__floatundisf
+  __PFX__floatundixf
+  __PFX__floatunditf
+  __PFX__floatuntidf
+  __PFX__floatuntisf
+  __PFX__floatuntixf
+  __PFX__floatuntitf
+  _Unwind_GetIPInfo
+}
+
+%inherit GCC_4.3.0 GCC_4.2.0
+GCC_4.3.0 {
+  # byte swapping routines
+  __PFX__bswapsi2
+  __PFX__bswapdi2
+
+  __emutls_get_address
+  __emutls_register_common
+  __PFX__ffssi2
+  __PFX__extendxftf2
+  __PFX__trunctfxf2
+
+  # fixed-point routines
+  __PFX__addqq3
+  __PFX__addhq3
+  __PFX__addsq3
+  __PFX__adddq3
+  __PFX__addtq3
+  __PFX__adduqq3
+  __PFX__adduhq3
+  __PFX__addusq3
+  __PFX__addudq3
+  __PFX__addutq3
+  __PFX__addha3
+  __PFX__addsa3
+  __PFX__addda3
+  __PFX__addta3
+  __PFX__adduha3
+  __PFX__addusa3
+  __PFX__adduda3
+  __PFX__adduta3
+  __PFX__ssaddqq3
+  __PFX__ssaddhq3
+  __PFX__ssaddsq3
+  __PFX__ssadddq3
+  __PFX__ssaddtq3
+  __PFX__ssaddha3
+  __PFX__ssaddsa3
+  __PFX__ssaddda3
+  __PFX__ssaddta3
+  __PFX__usadduqq3
+  __PFX__usadduhq3
+  __PFX__usaddusq3
+  __PFX__usaddudq3
+  __PFX__usaddutq3
+  __PFX__usadduha3
+  __PFX__usaddusa3
+  __PFX__usadduda3
+  __PFX__usadduta3
+  __PFX__subqq3
+  __PFX__subhq3
+  __PFX__subsq3
+  __PFX__subdq3
+  __PFX__subtq3
+  __PFX__subuqq3
+  __PFX__subuhq3
+  __PFX__subusq3
+  __PFX__subudq3
+  __PFX__subutq3
+  __PFX__subha3
+  __PFX__subsa3
+  __PFX__subda3
+  __PFX__subta3
+  __PFX__subuha3
+  __PFX__subusa3
+  __PFX__subuda3
+  __PFX__subuta3
+  __PFX__sssubqq3
+  __PFX__sssubhq3
+  __PFX__sssubsq3
+  __PFX__sssubdq3
+  __PFX__sssubtq3
+  __PFX__sssubha3
+  __PFX__sssubsa3
+  __PFX__sssubda3
+  __PFX__sssubta3
+  __PFX__ussubuqq3
+  __PFX__ussubuhq3
+  __PFX__ussubusq3
+  __PFX__ussubudq3
+  __PFX__ussubutq3
+  __PFX__ussubuha3
+  __PFX__ussubusa3
+  __PFX__ussubuda3
+  __PFX__ussubuta3
+  __PFX__mulqq3
+  __PFX__mulhq3
+  __PFX__mulsq3
+  __PFX__muldq3
+  __PFX__multq3
+  __PFX__muluqq3
+  __PFX__muluhq3
+  __PFX__mulusq3
+  __PFX__muludq3
+  __PFX__mulutq3
+  __PFX__mulha3
+  __PFX__mulsa3
+  __PFX__mulda3
+  __PFX__multa3
+  __PFX__muluha3
+  __PFX__mulusa3
+  __PFX__muluda3
+  __PFX__muluta3
+  __PFX__ssmulqq3
+  __PFX__ssmulhq3
+  __PFX__ssmulsq3
+  __PFX__ssmuldq3
+  __PFX__ssmultq3
+  __PFX__ssmulha3
+  __PFX__ssmulsa3
+  __PFX__ssmulda3
+  __PFX__ssmulta3
+  __PFX__usmuluqq3
+  __PFX__usmuluhq3
+  __PFX__usmulusq3
+  __PFX__usmuludq3
+  __PFX__usmulutq3
+  __PFX__usmuluha3
+  __PFX__usmulusa3
+  __PFX__usmuluda3
+  __PFX__usmuluta3
+  __PFX__divqq3
+  __PFX__divhq3
+  __PFX__divsq3
+  __PFX__divdq3
+  __PFX__divtq3
+  __PFX__divha3
+  __PFX__divsa3
+  __PFX__divda3
+  __PFX__divta3
+  __PFX__udivuqq3
+  __PFX__udivuhq3
+  __PFX__udivusq3
+  __PFX__udivudq3
+  __PFX__udivutq3
+  __PFX__udivuha3
+  __PFX__udivusa3
+  __PFX__udivuda3
+  __PFX__udivuta3
+  __PFX__ssdivqq3
+  __PFX__ssdivhq3
+  __PFX__ssdivsq3
+  __PFX__ssdivdq3
+  __PFX__ssdivtq3
+  __PFX__ssdivha3
+  __PFX__ssdivsa3
+  __PFX__ssdivda3
+  __PFX__ssdivta3
+  __PFX__usdivuqq3
+  __PFX__usdivuhq3
+  __PFX__usdivusq3
+  __PFX__usdivudq3
+  __PFX__usdivutq3
+  __PFX__usdivuha3
+  __PFX__usdivusa3
+  __PFX__usdivuda3
+  __PFX__usdivuta3
+  __PFX__negqq2
+  __PFX__neghq2
+  __PFX__negsq2
+  __PFX__negdq2
+  __PFX__negtq2
+  __PFX__neguqq2
+  __PFX__neguhq2
+  __PFX__negusq2
+  __PFX__negudq2
+  __PFX__negutq2
+  __PFX__negha2
+  __PFX__negsa2
+  __PFX__negda2
+  __PFX__negta2
+  __PFX__neguha2
+  __PFX__negusa2
+  __PFX__neguda2
+  __PFX__neguta2
+  __PFX__ssnegqq2
+  __PFX__ssneghq2
+  __PFX__ssnegsq2
+  __PFX__ssnegdq2
+  __PFX__ssnegtq2
+  __PFX__ssnegha2
+  __PFX__ssnegsa2
+  __PFX__ssnegda2
+  __PFX__ssnegta2
+  __PFX__usneguqq2
+  __PFX__usneguhq2
+  __PFX__usnegusq2
+  __PFX__usnegudq2
+  __PFX__usnegutq2
+  __PFX__usneguha2
+  __PFX__usnegusa2
+  __PFX__usneguda2
+  __PFX__usneguta2
+  __PFX__ashlqq3
+  __PFX__ashlhq3
+  __PFX__ashlsq3
+  __PFX__ashldq3
+  __PFX__ashltq3
+  __PFX__ashluqq3
+  __PFX__ashluhq3
+  __PFX__ashlusq3
+  __PFX__ashludq3
+  __PFX__ashlutq3
+  __PFX__ashlha3
+  __PFX__ashlsa3
+  __PFX__ashlda3
+  __PFX__ashlta3
+  __PFX__ashluha3
+  __PFX__ashlusa3
+  __PFX__ashluda3
+  __PFX__ashluta3
+  __PFX__ashrqq3
+  __PFX__ashrhq3
+  __PFX__ashrsq3
+  __PFX__ashrdq3
+  __PFX__ashrtq3
+  __PFX__ashrha3
+  __PFX__ashrsa3
+  __PFX__ashrda3
+  __PFX__ashrta3
+  __PFX__lshruqq3
+  __PFX__lshruhq3
+  __PFX__lshrusq3
+  __PFX__lshrudq3
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+  __PFX__satfractunsqiusq
+  __PFX__satfractunsqiudq
+  __PFX__satfractunsqiutq
+  __PFX__satfractunsqiuha
+  __PFX__satfractunsqiusa
+  __PFX__satfractunsqiuda
+  __PFX__satfractunsqiuta
+  __PFX__satfractunshiqq
+  __PFX__satfractunshihq
+  __PFX__satfractunshisq
+  __PFX__satfractunshidq
+  __PFX__satfractunshitq
+  __PFX__satfractunshiha
+  __PFX__satfractunshisa
+  __PFX__satfractunshida
+  __PFX__satfractunshita
+  __PFX__satfractunshiuqq
+  __PFX__satfractunshiuhq
+  __PFX__satfractunshiusq
+  __PFX__satfractunshiudq
+  __PFX__satfractunshiutq
+  __PFX__satfractunshiuha
+  __PFX__satfractunshiusa
+  __PFX__satfractunshiuda
+  __PFX__satfractunshiuta
+  __PFX__satfractunssiqq
+  __PFX__satfractunssihq
+  __PFX__satfractunssisq
+  __PFX__satfractunssidq
+  __PFX__satfractunssitq
+  __PFX__satfractunssiha
+  __PFX__satfractunssisa
+  __PFX__satfractunssida
+  __PFX__satfractunssita
+  __PFX__satfractunssiuqq
+  __PFX__satfractunssiuhq
+  __PFX__satfractunssiusq
+  __PFX__satfractunssiudq
+  __PFX__satfractunssiutq
+  __PFX__satfractunssiuha
+  __PFX__satfractunssiusa
+  __PFX__satfractunssiuda
+  __PFX__satfractunssiuta
+  __PFX__satfractunsdiqq
+  __PFX__satfractunsdihq
+  __PFX__satfractunsdisq
+  __PFX__satfractunsdidq
+  __PFX__satfractunsditq
+  __PFX__satfractunsdiha
+  __PFX__satfractunsdisa
+  __PFX__satfractunsdida
+  __PFX__satfractunsdita
+  __PFX__satfractunsdiuqq
+  __PFX__satfractunsdiuhq
+  __PFX__satfractunsdiusq
+  __PFX__satfractunsdiudq
+  __PFX__satfractunsdiutq
+  __PFX__satfractunsdiuha
+  __PFX__satfractunsdiusa
+  __PFX__satfractunsdiuda
+  __PFX__satfractunsdiuta
+  __PFX__satfractunstiqq
+  __PFX__satfractunstihq
+  __PFX__satfractunstisq
+  __PFX__satfractunstidq
+  __PFX__satfractunstitq
+  __PFX__satfractunstiha
+  __PFX__satfractunstisa
+  __PFX__satfractunstida
+  __PFX__satfractunstita
+  __PFX__satfractunstiuqq
+  __PFX__satfractunstiuhq
+  __PFX__satfractunstiusq
+  __PFX__satfractunstiudq
+  __PFX__satfractunstiutq
+  __PFX__satfractunstiuha
+  __PFX__satfractunstiusa
+  __PFX__satfractunstiuda
+  __PFX__satfractunstiuta
+}
+
+%inherit GCC_4.4.0 GCC_4.3.0
+GCC_4.4.0 {
+  __sync_fetch_and_add_1
+  __sync_fetch_and_sub_1
+  __sync_fetch_and_or_1
+  __sync_fetch_and_and_1
+  __sync_fetch_and_xor_1
+  __sync_fetch_and_nand_1
+  __sync_add_and_fetch_1
+  __sync_sub_and_fetch_1
+  __sync_or_and_fetch_1
+  __sync_and_and_fetch_1
+  __sync_xor_and_fetch_1
+  __sync_nand_and_fetch_1
+  __sync_bool_compare_and_swap_1
+  __sync_val_compare_and_swap_1
+  __sync_lock_test_and_set_1
+
+  __sync_fetch_and_add_2
+  __sync_fetch_and_sub_2
+  __sync_fetch_and_or_2
+  __sync_fetch_and_and_2
+  __sync_fetch_and_xor_2
+  __sync_fetch_and_nand_2
+  __sync_add_and_fetch_2
+  __sync_sub_and_fetch_2
+  __sync_or_and_fetch_2
+  __sync_and_and_fetch_2
+  __sync_xor_and_fetch_2
+  __sync_nand_and_fetch_2
+  __sync_bool_compare_and_swap_2
+  __sync_val_compare_and_swap_2
+  __sync_lock_test_and_set_2
+
+  __sync_fetch_and_add_4
+  __sync_fetch_and_sub_4
+  __sync_fetch_and_or_4
+  __sync_fetch_and_and_4
+  __sync_fetch_and_xor_4
+  __sync_fetch_and_nand_4
+  __sync_add_and_fetch_4
+  __sync_sub_and_fetch_4
+  __sync_or_and_fetch_4
+  __sync_and_and_fetch_4
+  __sync_xor_and_fetch_4
+  __sync_nand_and_fetch_4
+  __sync_bool_compare_and_swap_4
+  __sync_val_compare_and_swap_4
+  __sync_lock_test_and_set_4
+
+  __sync_fetch_and_add_8
+  __sync_fetch_and_sub_8
+  __sync_fetch_and_or_8
+  __sync_fetch_and_and_8
+  __sync_fetch_and_xor_8
+  __sync_fetch_and_nand_8
+  __sync_add_and_fetch_8
+  __sync_sub_and_fetch_8
+  __sync_or_and_fetch_8
+  __sync_and_and_fetch_8
+  __sync_xor_and_fetch_8
+  __sync_nand_and_fetch_8
+  __sync_bool_compare_and_swap_8
+  __sync_val_compare_and_swap_8
+  __sync_lock_test_and_set_8
+
+  __sync_fetch_and_add_16
+  __sync_fetch_and_sub_16
+  __sync_fetch_and_or_16
+  __sync_fetch_and_and_16
+  __sync_fetch_and_xor_16
+  __sync_fetch_and_nand_16
+  __sync_add_and_fetch_16
+  __sync_sub_and_fetch_16
+  __sync_or_and_fetch_16
+  __sync_and_and_fetch_16
+  __sync_xor_and_fetch_16
+  __sync_nand_and_fetch_16
+  __sync_bool_compare_and_swap_16
+  __sync_val_compare_and_swap_16
+  __sync_lock_test_and_set_16
+
+  __sync_synchronize
+}
+
+%inherit GCC_4.5.0 GCC_4.4.0
+GCC_4.5.0 {
+  __unordxf2
+  __unordtf2
+}
+
+%inherit GCC_4.6.0 GCC_4.5.0
+GCC_4.6.0 {
+  __morestack_segments
+  __morestack_current_segment
+  __morestack_initial_sp
+  __splitstack_find
+}
Index: trunk/libgcc/Makefile.in
===================================================================
--- trunk.orig/libgcc/Makefile.in
+++ trunk/libgcc/Makefile.in
@@ -250,6 +250,10 @@  gcc_s_compile = $(gcc_compile) -DSHARED
 objects = $(filter %$(objext),$^)
 
 # Collect any host-specific information from Makefile fragments.
+
+LIBGCC_VER_GNU_PREFIX = __
+LIBGCC_VER_SYMBOLS_PREFIX =
+
 tmake_file = @tmake_file@
 include $(srcdir)/empty.mk $(tmake_file)
 
@@ -795,6 +799,9 @@  libgcc_s$(SHLIB_EXT): libgcc.map
 mapfile = libgcc.map
 endif
 
+libgcc-std.ver: $(srcdir)/libgcc-std.ver.in
+	sed -e 's/__PFX__/$(LIBGCC_VER_GNU_PREFIX)/g' < $< > $@
+
 libgcc_s$(SHLIB_EXT): $(libgcc-s-objects) $(extra-parts)
 	# @multilib_flags@ is still needed because this may use
 	# $(GCC_FOR_TARGET) and $(LIBGCC2_CFLAGS) directly.
Index: trunk/gcc/Makefile.in
===================================================================
--- trunk.orig/gcc/Makefile.in
+++ trunk/gcc/Makefile.in
@@ -1892,7 +1892,10 @@  LIB2ADD_ST = $(LIB2FUNCS_STATIC_EXTRA)
 # which case they will start with $(srcdir)), or generated into the build
 # directory (in which case they will be relative paths).
 srcdirify = $(patsubst $(srcdir)%,$$(gcc_srcdir)%,$(filter $(srcdir)%,$(1))) \
-            $(patsubst %,$$(gcc_objdir)/%,$(filter-out $(srcdir)%,$(1)))
+            $(patsubst $$(libgcc_objdir)/%,%, \
+		$(filter $$(libgcc_objdir)%,$(1))) \
+            $(patsubst %,$$(gcc_objdir)/%, \
+		$(filter-out $(srcdir)% $$(libgcc_objdir)%,$(1)))
 
 # The distinction between these two variables is no longer relevant,
 # so we combine them.  Sort removes duplicates.
Index: trunk/libgcc/config/t-gnu-prefix
===================================================================
--- /dev/null
+++ trunk/libgcc/config/t-gnu-prefix
@@ -0,0 +1 @@ 
+LIBGCC_VER_GNU_PREFIX = __gnu_
Index: trunk/gcc/config/frv/t-linux
===================================================================
--- trunk.orig/gcc/config/frv/t-linux
+++ trunk/gcc/config/frv/t-linux
@@ -29,5 +29,5 @@  EXTRA_MULTILIB_PARTS =
 CRTSTUFF_T_CFLAGS = -fPIC
 TARGET_LIBGCC2_CFLAGS = -fPIC
 
-SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver \
+SHLIB_MAPFILES = $$(libgcc_objdir)/libgcc-std.ver \
 		 $(srcdir)/config/frv/libgcc-frv.ver
Index: trunk/gcc/config/i386/t-cygming
===================================================================
--- trunk.orig/gcc/config/i386/t-cygming
+++ trunk/gcc/config/i386/t-cygming
@@ -113,4 +113,4 @@  SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
 # We'd like to use SHLIB_SONAME here too, but shlib_base_name
 # does not get substituted before mkmap-flat.awk is run.
 SHLIB_MKMAP_OPTS = -v pe_dll=libgcc_s_$(EH_MODEL)-$(SHLIB_SOVERSION)$(SHLIB_EXT)
-SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver
+SHLIB_MAPFILES = $$(libgcc_objdir)/libgcc-std.ver
Index: trunk/gcc/config/i386/t-linux
===================================================================
--- trunk.orig/gcc/config/i386/t-linux
+++ trunk/gcc/config/i386/t-linux
@@ -1,5 +1,5 @@ 
 # On 64bit we do not need any exports for glibc for 64-bit libgcc_s.
 # Need to support TImode for x86.  Override the settings from
 # t-slibgcc-elf-ver and t-linux
-SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver \
+SHLIB_MAPFILES = $$(libgcc_objdir)/libgcc-std.ver \
 		 $(srcdir)/config/i386/libgcc-glibc.ver
Index: trunk/gcc/config/mips/t-slibgcc-irix
===================================================================
--- trunk.orig/gcc/config/mips/t-slibgcc-irix
+++ trunk/gcc/config/mips/t-slibgcc-irix
@@ -49,4 +49,4 @@  SHLIB_INSTALL = \
 	$(LN_S) $(SHLIB_SONAME) \
 	  $$(DESTDIR)$$(slibdir)$(SHLIB_SLIBDIR_QUAL)/$(SHLIB_SOLINK)
 SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
-SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver
+SHLIB_MAPFILES = $$(libgcc_objdir)/libgcc-std.ver
Index: trunk/gcc/config/rs6000/t-aix43
===================================================================
--- trunk.orig/gcc/config/rs6000/t-aix43
+++ trunk/gcc/config/rs6000/t-aix43
@@ -82,7 +82,7 @@  SHLIB_INSTALL = \
 		$$(DESTDIR)$$(slibdir)@shlib_slibdir_qual@/
 SHLIB_LIBS = -lc `case @multilib_dir@ in *pthread*) echo -lpthread ;; esac`
 SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
-SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver $(srcdir)/config/rs6000/libgcc-ppc64.ver
+SHLIB_MAPFILES = $$(libgcc_objdir)/libgcc-std.ver $(srcdir)/config/rs6000/libgcc-ppc64.ver
 SHLIB_NM_FLAGS = -Bpg -X32_64
 
 # GCC 128-bit long double support routines.
Index: trunk/gcc/config/rs6000/t-aix52
===================================================================
--- trunk.orig/gcc/config/rs6000/t-aix52
+++ trunk/gcc/config/rs6000/t-aix52
@@ -63,7 +63,7 @@  SHLIB_INSTALL = \
 		$$(DESTDIR)$$(slibdir)@shlib_slibdir_qual@/
 SHLIB_LIBS = -lc `case @multilib_dir@ in *pthread*) echo -lpthread ;; esac`
 SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
-SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver $(srcdir)/config/rs6000/libgcc-ppc64.ver
+SHLIB_MAPFILES = $$(libgcc_objdir)/libgcc-std.ver $(srcdir)/config/rs6000/libgcc-ppc64.ver
 SHLIB_NM_FLAGS = -Bpg -X32_64
 
 # GCC 128-bit long double support routines.
Index: trunk/gcc/config/sparc/t-linux
===================================================================
--- trunk.orig/gcc/config/sparc/t-linux
+++ trunk/gcc/config/sparc/t-linux
@@ -1,5 +1,5 @@ 
 # Override t-slibgcc-elf-ver to export some libgcc symbols with
 # the symbol versions that glibc used.
 # Avoid the t-linux version file.
-SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver \
+SHLIB_MAPFILES = $$(libgcc_objdir)/libgcc-std.ver \
 		 $(srcdir)/config/sparc/libgcc-sparc-glibc.ver
Index: trunk/gcc/tree.c
===================================================================
--- trunk.orig/gcc/tree.c
+++ trunk/gcc/tree.c
@@ -9525,6 +9525,10 @@  build_common_builtin_nodes (void)
 	const char *p;
 	enum built_in_function mcode, dcode;
 	tree type, inner_type;
+	const char *prefix = "__";
+
+	if (targetm.libfunc_gnu_prefix)
+	  prefix = "__gnu_";
 
 	type = lang_hooks.types.type_for_mode ((enum machine_mode) mode, 0);
 	if (type == NULL)
@@ -9543,13 +9547,17 @@  build_common_builtin_nodes (void)
 	  *q = TOLOWER (*p);
 	*q = '\0';
 
-	built_in_names[mcode] = concat ("__mul", mode_name_buf, "3", NULL);
+	built_in_names[mcode] = concat (prefix, "mul", mode_name_buf, "3",
+					NULL);
         local_define_builtin (built_in_names[mcode], ftype, mcode,
-			      built_in_names[mcode], ECF_CONST | ECF_NOTHROW | ECF_LEAF);
+			      built_in_names[mcode],
+			      ECF_CONST | ECF_NOTHROW | ECF_LEAF);
 
-	built_in_names[dcode] = concat ("__div", mode_name_buf, "3", NULL);
+	built_in_names[dcode] = concat (prefix, "div", mode_name_buf, "3",
+					NULL);
         local_define_builtin (built_in_names[dcode], ftype, dcode,
-			      built_in_names[dcode], ECF_CONST | ECF_NOTHROW | ECF_LEAF);
+			      built_in_names[dcode],
+			      ECF_CONST | ECF_NOTHROW | ECF_LEAF);
       }
   }
 }
Index: trunk/gcc/config/fixed-bit.h
===================================================================
--- trunk.orig/gcc/config/fixed-bit.h
+++ trunk/gcc/config/fixed-bit.h
@@ -445,35 +445,39 @@  typedef union
 #define IBITS		IBITS2(MODE_NAME)
 #define I_F_BITS	(FBITS + IBITS)
 
-#define FIXED_OP(OP,MODE,NUM)	OP ## MODE ## NUM
+#ifdef LIBGCC2_GNU_PREFIX
+#define FIXED_OP(OP,MODE,NUM)	__gnu_ ## OP ## MODE ## NUM
+#else
+#define FIXED_OP(OP,MODE,NUM)	__ ## OP ## MODE ## NUM
+#endif
 
-#define FIXED_SATURATE1_TEMP(NAME)	FIXED_OP(__saturate1,NAME,)
-#define FIXED_SATURATE2_TEMP(NAME)	FIXED_OP(__saturate2,NAME,)
-#define FIXED_MULHELPER_TEMP(NAME)	FIXED_OP(__mulhelper,NAME,)
-#define FIXED_DIVHELPER_TEMP(NAME)	FIXED_OP(__divhelper,NAME,)
-#define FIXED_ASHLHELPER_TEMP(NAME)	FIXED_OP(__ashlhelper,NAME,)
-#define FIXED_ADD_TEMP(NAME)	FIXED_OP(__add,NAME,3)
-#define FIXED_SSADD_TEMP(NAME)	FIXED_OP(__ssadd,NAME,3)
-#define FIXED_USADD_TEMP(NAME)	FIXED_OP(__usadd,NAME,3)
-#define FIXED_SUB_TEMP(NAME)	FIXED_OP(__sub,NAME,3)
-#define FIXED_SSSUB_TEMP(NAME)	FIXED_OP(__sssub,NAME,3)
-#define FIXED_USSUB_TEMP(NAME)	FIXED_OP(__ussub,NAME,3)
-#define FIXED_MUL_TEMP(NAME)	FIXED_OP(__mul,NAME,3)
-#define FIXED_SSMUL_TEMP(NAME)	FIXED_OP(__ssmul,NAME,3)
-#define FIXED_USMUL_TEMP(NAME)	FIXED_OP(__usmul,NAME,3)
-#define FIXED_DIV_TEMP(NAME)	FIXED_OP(__div,NAME,3)
-#define FIXED_UDIV_TEMP(NAME)	FIXED_OP(__udiv,NAME,3)
-#define FIXED_SSDIV_TEMP(NAME)	FIXED_OP(__ssdiv,NAME,3)
-#define FIXED_USDIV_TEMP(NAME)	FIXED_OP(__usdiv,NAME,3)
-#define FIXED_NEG_TEMP(NAME)	FIXED_OP(__neg,NAME,2)
-#define FIXED_SSNEG_TEMP(NAME)	FIXED_OP(__ssneg,NAME,2)
-#define FIXED_USNEG_TEMP(NAME)	FIXED_OP(__usneg,NAME,2)
-#define FIXED_ASHL_TEMP(NAME)	FIXED_OP(__ashl,NAME,3)
-#define FIXED_ASHR_TEMP(NAME)	FIXED_OP(__ashr,NAME,3)
-#define FIXED_LSHR_TEMP(NAME)	FIXED_OP(__lshr,NAME,3)
-#define FIXED_SSASHL_TEMP(NAME)	FIXED_OP(__ssashl,NAME,3)
-#define FIXED_USASHL_TEMP(NAME)	FIXED_OP(__usashl,NAME,3)
-#define FIXED_CMP_TEMP(NAME)	FIXED_OP(__cmp,NAME,2)
+#define FIXED_SATURATE1_TEMP(NAME)	FIXED_OP(saturate1,NAME,)
+#define FIXED_SATURATE2_TEMP(NAME)	FIXED_OP(saturate2,NAME,)
+#define FIXED_MULHELPER_TEMP(NAME)	FIXED_OP(mulhelper,NAME,)
+#define FIXED_DIVHELPER_TEMP(NAME)	FIXED_OP(divhelper,NAME,)
+#define FIXED_ASHLHELPER_TEMP(NAME)	FIXED_OP(ashlhelper,NAME,)
+#define FIXED_ADD_TEMP(NAME)	FIXED_OP(add,NAME,3)
+#define FIXED_SSADD_TEMP(NAME)	FIXED_OP(ssadd,NAME,3)
+#define FIXED_USADD_TEMP(NAME)	FIXED_OP(usadd,NAME,3)
+#define FIXED_SUB_TEMP(NAME)	FIXED_OP(sub,NAME,3)
+#define FIXED_SSSUB_TEMP(NAME)	FIXED_OP(sssub,NAME,3)
+#define FIXED_USSUB_TEMP(NAME)	FIXED_OP(ussub,NAME,3)
+#define FIXED_MUL_TEMP(NAME)	FIXED_OP(mul,NAME,3)
+#define FIXED_SSMUL_TEMP(NAME)	FIXED_OP(ssmul,NAME,3)
+#define FIXED_USMUL_TEMP(NAME)	FIXED_OP(usmul,NAME,3)
+#define FIXED_DIV_TEMP(NAME)	FIXED_OP(div,NAME,3)
+#define FIXED_UDIV_TEMP(NAME)	FIXED_OP(udiv,NAME,3)
+#define FIXED_SSDIV_TEMP(NAME)	FIXED_OP(ssdiv,NAME,3)
+#define FIXED_USDIV_TEMP(NAME)	FIXED_OP(usdiv,NAME,3)
+#define FIXED_NEG_TEMP(NAME)	FIXED_OP(neg,NAME,2)
+#define FIXED_SSNEG_TEMP(NAME)	FIXED_OP(ssneg,NAME,2)
+#define FIXED_USNEG_TEMP(NAME)	FIXED_OP(usneg,NAME,2)
+#define FIXED_ASHL_TEMP(NAME)	FIXED_OP(ashl,NAME,3)
+#define FIXED_ASHR_TEMP(NAME)	FIXED_OP(ashr,NAME,3)
+#define FIXED_LSHR_TEMP(NAME)	FIXED_OP(lshr,NAME,3)
+#define FIXED_SSASHL_TEMP(NAME)	FIXED_OP(ssashl,NAME,3)
+#define FIXED_USASHL_TEMP(NAME)	FIXED_OP(usashl,NAME,3)
+#define FIXED_CMP_TEMP(NAME)	FIXED_OP(cmp,NAME,2)
 
 #if defined (MODE_NAME)
 #if defined (DINT_C_TYPE)
@@ -1146,14 +1150,19 @@  extern FIXED_C_TYPE FIXED_USASHL (FIXED_
 #define TO_HAVE_PADDING_BITS	(TO_PADDING_BITS > 0)
 #endif /* TO_TYPE == 4  */
 
-#define FIXED_CONVERT_OP(OP,FROM,TO)	OP ## FROM ## TO
-#define FIXED_CONVERT_OP2(OP,FROM,TO)	OP ## FROM ## TO ## 2
-#define FRACT_TEMP(N1,N2)		FIXED_CONVERT_OP(__fract,N1,N2)
-#define FRACT2_TEMP(N1,N2)		FIXED_CONVERT_OP2(__fract,N1,N2)
-#define SATFRACT_TEMP(N1,N2)		FIXED_CONVERT_OP(__satfract,N1,N2)
-#define SATFRACT2_TEMP(N1,N2)		FIXED_CONVERT_OP2(__satfract,N1,N2)
-#define FRACTUNS_TEMP(N1,N2)		FIXED_CONVERT_OP(__fractuns,N1,N2)
-#define SATFRACTUNS_TEMP(N1,N2)		FIXED_CONVERT_OP(__satfractuns,N1,N2)
+#ifdef LIBGCC2_GNU_PREFIX
+#define FIXED_CONVERT_OP(OP,FROM,TO)	__gnu_ ## OP ## FROM ## TO
+#define FIXED_CONVERT_OP2(OP,FROM,TO)	__gnu_ ## OP ## FROM ## TO ## 2
+#else
+#define FIXED_CONVERT_OP(OP,FROM,TO)	__ OP ## FROM ## TO
+#define FIXED_CONVERT_OP2(OP,FROM,TO)	__ OP ## FROM ## TO ## 2
+#endif
+#define FRACT_TEMP(N1,N2)		FIXED_CONVERT_OP(fract,N1,N2)
+#define FRACT2_TEMP(N1,N2)		FIXED_CONVERT_OP2(fract,N1,N2)
+#define SATFRACT_TEMP(N1,N2)		FIXED_CONVERT_OP(satfract,N1,N2)
+#define SATFRACT2_TEMP(N1,N2)		FIXED_CONVERT_OP2(satfract,N1,N2)
+#define FRACTUNS_TEMP(N1,N2)		FIXED_CONVERT_OP(fractuns,N1,N2)
+#define SATFRACTUNS_TEMP(N1,N2)		FIXED_CONVERT_OP(satfractuns,N1,N2)
 
 /* Define conversions from fixed-point to fixed-point.  */
 #if FROM_TYPE == 4 && TO_TYPE == 4
Index: trunk/gcc/system.h
===================================================================
--- trunk.orig/gcc/system.h
+++ trunk/gcc/system.h
@@ -762,8 +762,8 @@  extern void fancy_abort (const char *, i
 	HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P
 
 /* Target macros only used for code built for the target, that have
-   moved to libgcc-tm.h.  */
- #pragma GCC poison DECLARE_LIBRARY_RENAMES
+   moved to libgcc-tm.h or have never been present elsewhere.  */
+ #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX
 
 /* Other obsolete target macros, or macros that used to be in target
    headers and were not used, and may be obsolete or may never have