libgcc2.h (__NW, __NDW): Define using a __gnu_ prefix if LIBGCC2_GNU_PREFIX is defined.

	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.

From-SVN: r174187

1 files changed, 42 insertions, 8 deletions

diff --git a/gcc/optabs.c b/gcc/optabs.c
index 62e123b..1473b0f 100644
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -5152,13 +5152,22 @@ gen_libfunc (optab optable, const char *opname, int suffix, enum machine_mode mo
   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_optab tab,
 
   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_optab tab,
 
   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_optab tab, const char *opname,
 
   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_optab tab, const char *opname,
   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.  */