Use i386-cpuinfo.c on all i386 targets

	libgcc:
	* config.host (i[34567]86-*-linux*, x86_64-*-linux*)
	(i[34567]86-*-kfreebsd*-gnu, x86_64-*-kfreebsd*-gnu)
	(i[34567]86-*-knetbsd*-gnu, i[34567]86-*-gnu*): Move
	i386/t-cpuinfo ...
	(i[34567]86-*-*, x86_64-*-*): ... here.

	* config/i386/libgcc-bsd.ver (GCC_4.8.0): New version.
	* config/i386/libgcc-sol2.ver (GCC_4.8.0): New version.

	* config/i386/i386-cpuinfo.c: Rename to ...
	* config/i386/cpuinfo.c: ... this.
	* config/i386/t-cpuinfo (LIB2ADD): Reflect this.

	* configure.ac (AC_CONFIG_HEADER): Call for auto-target.h.
	(libgcc_cv_init_priority): New test.
	* configure: Regenerate.
	* config.in: New file.
	* Makefile.in (clean): Rename config.h to auto-target.h.
	(config.h): Likewise.
	(stamp-h): Likewise.

	* config/i386/cpuinfo.c (auto-target.h): Include.
	(CONSTRUCTOR_PRIORITY): Define.
	(__cpu_indicator_init): Use it.

	gcc
	* doc/extend.texi (X86 Built-in Functions, __builtin_cpu_init):
	Document requirement to call in constructors.

	* config/i386/i386.c: Update comments for i386-cpuinfo.c name
	change.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@187365 138bc75d-0d04-0410-961f-82ee72b054a4

11 files changed, 330 insertions, 50 deletions

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index b78368619e2..05478d68560 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,30 @@
+2012-05-10  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* config.host (i[34567]86-*-linux*, x86_64-*-linux*)
+	(i[34567]86-*-kfreebsd*-gnu, x86_64-*-kfreebsd*-gnu)
+	(i[34567]86-*-knetbsd*-gnu, i[34567]86-*-gnu*): Move
+	i386/t-cpuinfo ...
+	(i[34567]86-*-*, x86_64-*-*): ... here.
+
+	* config/i386/libgcc-bsd.ver (GCC_4.8.0): New version.
+	* config/i386/libgcc-sol2.ver (GCC_4.8.0): New version.
+
+	* config/i386/i386-cpuinfo.c: Rename to ...
+	* config/i386/cpuinfo.c: ... this.
+	* config/i386/t-cpuinfo (LIB2ADD): Reflect this.
+
+	* configure.ac (AC_CONFIG_HEADER): Call for auto-target.h.
+	(libgcc_cv_init_priority): New test.
+	* configure: Regenerate.
+	* config.in: New file.
+	* Makefile.in (clean): Rename config.h to auto-target.h.
+	(config.h): Likewise.
+	(stamp-h): Likewise.
+
+	* config/i386/cpuinfo.c (auto-target.h): Include.
+	(CONSTRUCTOR_PRIORITY): Define.
+	(__cpu_indicator_init): Use it.
+
 2012-05-09  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* longlong.h: Use a URL instead of an FSF postal address.
diff --git a/libgcc/Makefile.in b/libgcc/Makefile.in
index e9ea2e9c90d..f529fa22195 100644
--- a/libgcc/Makefile.in
+++ b/libgcc/Makefile.in
@@ -121,7 +121,7 @@ installcheck:
 .PHONY: all clean
 
 clean:
-	-rm -f config.h libgcc_tm.h stamp-h stmp-ldirs libgcc.map
+	-rm -f auto-target.h libgcc_tm.h stamp-h stmp-ldirs libgcc.map
 	-rm -f *$(objext)
 	-rm -f *.dep
 	-rm -f *.a
@@ -139,9 +139,9 @@ Makefile: $(srcdir)/Makefile.in config.status
 
 # Depending on Makefile makes sure that config.status has been re-run
 # if needed.  This prevents problems with parallel builds.
-config.h: stamp-h ; @true
+auto-target.h: stamp-h ; @true
 stamp-h: $(srcdir)/config.in config.status Makefile
-	CONFIG_FILES= CONFIG_HEADERS=config.h:$(srcdir)/config.in $(SHELL) ./config.status
+	CONFIG_FILES= CONFIG_HEADERS=auto-target.h:$(srcdir)/config.in $(SHELL) ./config.status
 
 config.status: $(srcdir)/configure $(srcdir)/config.host
 	$(SHELL) ./config.status --recheck
diff --git a/libgcc/config.host b/libgcc/config.host
index 2dbb95b6d76..14c705b967b 100644
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -1124,11 +1124,17 @@ mep*-*-*)
 esac
 
 case ${host} in
+i[34567]86-*-* | x86_64-*-*)
+	tmake_file="${tmake_file} i386/t-cpuinfo"
+	;;
+esac
+
+case ${host} in
 i[34567]86-*-linux* | x86_64-*-linux* | \
   i[34567]86-*-kfreebsd*-gnu | x86_64-*-kfreebsd*-gnu | \
   i[34567]86-*-knetbsd*-gnu | \
   i[34567]86-*-gnu*)
-	tmake_file="${tmake_file} t-tls i386/t-linux i386/t-cpuinfo"
+	tmake_file="${tmake_file} t-tls i386/t-linux"
 	if test "$libgcc_cv_cfi" = "yes"; then
 		tmake_file="${tmake_file} t-stack i386/t-stack-i386"
 	fi
diff --git a/libgcc/config.in b/libgcc/config.in
new file mode 100644
index 00000000000..4baab989197
--- /dev/null
+++ b/libgcc/config.in
@@ -0,0 +1,70 @@
+/* config.in.  Generated from configure.ac by autoheader.  */
+
+/* Define to 1 if the target assembler supports thread-local storage. */
+#undef HAVE_CC_TLS
+
+/* Define if _Unwind_GetIPInfo is available. */
+#undef HAVE_GETIPINFO
+
+/* Define if the compiler supports init priority. */
+#undef HAVE_INIT_PRIORITY
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define to 1 if you have the <memory.h> header file. */
+#undef HAVE_MEMORY_H
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Define if the C compiler is configured for setjmp/longjmp exceptions. */
+#undef LIBGCC_SJLJ_EXCEPTIONS
+
+/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT
+
+/* Define to the full name of this package. */
+#undef PACKAGE_NAME
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#undef PACKAGE_VERSION
+
+/* The size of `double', as computed by sizeof. */
+#undef SIZEOF_DOUBLE
+
+/* The size of `long double', as computed by sizeof. */
+#undef SIZEOF_LONG_DOUBLE
+
+/* Define to 1 if you have the ANSI C header files. */
+#undef STDC_HEADERS
+
+/* Define to 1 if the target use emutls for thread-local storage. */
+#undef USE_EMUTLS
diff --git a/libgcc/config/i386/i386-cpuinfo.c b/libgcc/config/i386/cpuinfo.c
index 6934778c0fc..1c22d7a4070 100644
--- a/libgcc/config/i386/i386-cpuinfo.c
+++ b/libgcc/config/i386/cpuinfo.c
@@ -20,8 +20,16 @@ along with GCC; see the file COPYING3.  If not see
 
 #include "cpuid.h"
 #include "tsystem.h"
+#include "auto-target.h"
 
-int __cpu_indicator_init (void) __attribute__ ((constructor (101)));
+#ifdef HAVE_INIT_PRIORITY
+#define CONSTRUCTOR_PRIORITY (101)
+#else
+#define CONSTRUCTOR_PRIORITY
+#endif
+
+int __cpu_indicator_init (void)
+  __attribute__ ((constructor CONSTRUCTOR_PRIORITY));
 
 enum vendor_signatures
 {
@@ -253,7 +261,7 @@ __get_cpuid_output (unsigned int __level,
    the priority set.  However, it still runs after ifunc initializers and
    needs to be called explicitly there.  */
 
-int __attribute__ ((constructor (101)))
+int __attribute__ ((constructor CONSTRUCTOR_PRIORITY))
 __cpu_indicator_init (void)
 {
   unsigned int eax, ebx, ecx, edx;
diff --git a/libgcc/config/i386/libgcc-bsd.ver b/libgcc/config/i386/libgcc-bsd.ver
index d9d74f95186..74622bf7763 100644
--- a/libgcc/config/i386/libgcc-bsd.ver
+++ b/libgcc/config/i386/libgcc-bsd.ver
@@ -1,4 +1,4 @@
-# Copyright (C) 2010 Free Software Foundation, Inc.
+# Copyright (C) 2010, 2012 Free Software Foundation, Inc.
 #
 # This file is part of GCC.
 #
@@ -106,3 +106,7 @@ GCC_4.6.0 {
   __trunctfxf2
   __unordtf2
 }
+
+GCC_4.8.0 {
+  __cpu_model
+}
diff --git a/libgcc/config/i386/libgcc-glibc.ver b/libgcc/config/i386/libgcc-glibc.ver
index b297362920d..07fd1f9c5a7 100644
--- a/libgcc/config/i386/libgcc-glibc.ver
+++ b/libgcc/config/i386/libgcc-glibc.ver
@@ -1,4 +1,4 @@
-# Copyright (C) 2008, 2010 Free Software Foundation, Inc.
+# Copyright (C) 2008, 2010, 2012 Free Software Foundation, Inc.
 #
 # This file is part of GCC.
 #
diff --git a/libgcc/config/i386/libgcc-sol2.ver b/libgcc/config/i386/libgcc-sol2.ver
index 26a0abfb541..af8a9a0bddb 100644
--- a/libgcc/config/i386/libgcc-sol2.ver
+++ b/libgcc/config/i386/libgcc-sol2.ver
@@ -1,4 +1,4 @@
-# Copyright (C) 2010 Free Software Foundation, Inc.
+# Copyright (C) 2010, 2012 Free Software Foundation, Inc.
 #
 # This file is part of GCC.
 #
@@ -106,3 +106,7 @@ GCC_4.5.0 {
   __trunctfxf2
   __unordtf2
 }
+
+GCC_4.8.0 {
+  __cpu_model
+}
diff --git a/libgcc/config/i386/t-cpuinfo b/libgcc/config/i386/t-cpuinfo
index dd271f9db6a..31c8db991c5 100644
--- a/libgcc/config/i386/t-cpuinfo
+++ b/libgcc/config/i386/t-cpuinfo
@@ -1 +1 @@
-LIB2ADD += $(srcdir)/config/i386/i386-cpuinfo.c
+LIB2ADD += $(srcdir)/config/i386/cpuinfo.c
diff --git a/libgcc/configure b/libgcc/configure
index 37afe9deaa8..9ce74e48d4e 100644
--- a/libgcc/configure
+++ b/libgcc/configure
@@ -2176,6 +2176,8 @@ ac_config_sub="$SHELL $ac_aux_dir/config.sub"  # Please don't use this var.
 ac_configure="$SHELL $ac_aux_dir/configure"  # Please don't use this var.
 
 
+ac_config_headers="$ac_config_headers auto-target.h:config.in"
+
 
 # Check whether --enable-shared was given.
 if test "${enable_shared+set}" = set; then :
@@ -4756,6 +4758,38 @@ if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then
 fi
 
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for init priority support" >&5
+$as_echo_n "checking for init priority support... " >&6; }
+if test "${libgcc_cv_init_priority+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+void ip (void) __attribute__ ((constructor (1)));
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  libgcc_cv_init_priority=yes
+else
+  libgcc_cv_init_priority=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgcc_cv_init_priority" >&5
+$as_echo "$libgcc_cv_init_priority" >&6; }
+if test $libgcc_cv_init_priority = yes; then
+
+$as_echo "#define HAVE_INIT_PRIORITY 1" >>confdefs.h
+
+fi
+
 # Conditionalize the sfp-machine.h header for this target machine.
 if test -z "${sfp_machine_header}"; then
 	sfp_machine_header=$cpu_type/sfp-machine.h
@@ -4902,43 +4936,7 @@ test "x$prefix" = xNONE && prefix=$ac_default_prefix
 # Let make expand exec_prefix.
 test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
 
-# Transform confdefs.h into DEFS.
-# Protect against shell expansion while executing Makefile rules.
-# Protect against Makefile macro expansion.
-#
-# If the first sed substitution is executed (which looks for macros that
-# take arguments), then branch to the quote section.  Otherwise,
-# look for a macro that doesn't take arguments.
-ac_script='
-:mline
-/\\$/{
- N
- s,\\\n,,
- b mline
-}
-t clear
-:clear
-s/^[	 ]*#[	 ]*define[	 ][	 ]*\([^	 (][^	 (]*([^)]*)\)[	 ]*\(.*\)/-D\1=\2/g
-t quote
-s/^[	 ]*#[	 ]*define[	 ][	 ]*\([^	 ][^	 ]*\)[	 ]*\(.*\)/-D\1=\2/g
-t quote
-b any
-:quote
-s/[	 `~#$^&*(){}\\|;'\''"<>?]/\\&/g
-s/\[/\\&/g
-s/\]/\\&/g
-s/\$/$$/g
-H
-:any
-${
-	g
-	s/^\n//
-	s/\n/ /g
-	p
-}
-'
-DEFS=`sed -n "$ac_script" confdefs.h`
-
+DEFS=-DHAVE_CONFIG_H
 
 ac_libobjs=
 ac_ltlibobjs=
@@ -5382,11 +5380,15 @@ case $ac_config_files in *"
 "*) set x $ac_config_files; shift; ac_config_files=$*;;
 esac
 
+case $ac_config_headers in *"
+"*) set x $ac_config_headers; shift; ac_config_headers=$*;;
+esac
 
 
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 # Files that config.status was made for.
 config_files="$ac_config_files"
+config_headers="$ac_config_headers"
 config_links="$ac_config_links"
 config_commands="$ac_config_commands"
 
@@ -5408,10 +5410,15 @@ Usage: $0 [OPTION]... [TAG]...
       --recheck    update $as_me by reconfiguring in the same conditions
       --file=FILE[:TEMPLATE]
                    instantiate the configuration file FILE
+      --header=FILE[:TEMPLATE]
+                   instantiate the configuration header FILE
 
 Configuration files:
 $config_files
 
+Configuration headers:
+$config_headers
+
 Configuration links:
 $config_links
 
@@ -5473,7 +5480,18 @@ do
     esac
     as_fn_append CONFIG_FILES " '$ac_optarg'"
     ac_need_defaults=false;;
-  --he | --h |  --help | --hel | -h )
+  --header | --heade | --head | --hea )
+    $ac_shift
+    case $ac_optarg in
+    *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    esac
+    as_fn_append CONFIG_HEADERS " '$ac_optarg'"
+    ac_need_defaults=false;;
+  --he | --h)
+    # Conflict between --help and --header
+    as_fn_error "ambiguous option: \`$1'
+Try \`$0 --help' for more information.";;
+  --help | --hel | -h )
     $as_echo "$ac_cs_usage"; exit ;;
   -q | -quiet | --quiet | --quie | --qui | --qu | --q \
   | -silent | --silent | --silen | --sile | --sil | --si | --s)
@@ -5542,6 +5560,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 for ac_config_target in $ac_config_targets
 do
   case $ac_config_target in
+    "auto-target.h") CONFIG_HEADERS="$CONFIG_HEADERS auto-target.h:config.in" ;;
     "enable-execute-stack.c") CONFIG_LINKS="$CONFIG_LINKS enable-execute-stack.c:$enable_execute_stack" ;;
     "unwind.h") CONFIG_LINKS="$CONFIG_LINKS unwind.h:$unwind_header" ;;
     "md-unwind-support.h") CONFIG_LINKS="$CONFIG_LINKS md-unwind-support.h:config/$md_unwind_header" ;;
@@ -5561,6 +5580,7 @@ done
 # bizarre bug on SunOS 4.1.3.
 if $ac_need_defaults; then
   test "${CONFIG_FILES+set}" = set || CONFIG_FILES=$config_files
+  test "${CONFIG_HEADERS+set}" = set || CONFIG_HEADERS=$config_headers
   test "${CONFIG_LINKS+set}" = set || CONFIG_LINKS=$config_links
   test "${CONFIG_COMMANDS+set}" = set || CONFIG_COMMANDS=$config_commands
 fi
@@ -5740,8 +5760,116 @@ fi
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 fi # test -n "$CONFIG_FILES"
 
+# Set up the scripts for CONFIG_HEADERS section.
+# No need to generate them if there are no CONFIG_HEADERS.
+# This happens for instance with `./config.status Makefile'.
+if test -n "$CONFIG_HEADERS"; then
+cat >"$tmp/defines.awk" <<\_ACAWK ||
+BEGIN {
+_ACEOF
+
+# Transform confdefs.h into an awk script `defines.awk', embedded as
+# here-document in config.status, that substitutes the proper values into
+# config.h.in to produce config.h.
+
+# Create a delimiter string that does not exist in confdefs.h, to ease
+# handling of long lines.
+ac_delim='%!_!# '
+for ac_last_try in false false :; do
+  ac_t=`sed -n "/$ac_delim/p" confdefs.h`
+  if test -z "$ac_t"; then
+    break
+  elif $ac_last_try; then
+    as_fn_error "could not make $CONFIG_HEADERS" "$LINENO" 5
+  else
+    ac_delim="$ac_delim!$ac_delim _$ac_delim!! "
+  fi
+done
 
-eval set X "  :F $CONFIG_FILES    :L $CONFIG_LINKS  :C $CONFIG_COMMANDS"
+# For the awk script, D is an array of macro values keyed by name,
+# likewise P contains macro parameters if any.  Preserve backslash
+# newline sequences.
+
+ac_word_re=[_$as_cr_Letters][_$as_cr_alnum]*
+sed -n '
+s/.\{148\}/&'"$ac_delim"'/g
+t rset
+:rset
+s/^[	 ]*#[	 ]*define[	 ][	 ]*/ /
+t def
+d
+:def
+s/\\$//
+t bsnl
+s/["\\]/\\&/g
+s/^ \('"$ac_word_re"'\)\(([^()]*)\)[	 ]*\(.*\)/P["\1"]="\2"\
+D["\1"]=" \3"/p
+s/^ \('"$ac_word_re"'\)[	 ]*\(.*\)/D["\1"]=" \2"/p
+d
+:bsnl
+s/["\\]/\\&/g
+s/^ \('"$ac_word_re"'\)\(([^()]*)\)[	 ]*\(.*\)/P["\1"]="\2"\
+D["\1"]=" \3\\\\\\n"\\/p
+t cont
+s/^ \('"$ac_word_re"'\)[	 ]*\(.*\)/D["\1"]=" \2\\\\\\n"\\/p
+t cont
+d
+:cont
+n
+s/.\{148\}/&'"$ac_delim"'/g
+t clear
+:clear
+s/\\$//
+t bsnlc
+s/["\\]/\\&/g; s/^/"/; s/$/"/p
+d
+:bsnlc
+s/["\\]/\\&/g; s/^/"/; s/$/\\\\\\n"\\/p
+b cont
+' <confdefs.h | sed '
+s/'"$ac_delim"'/"\\\
+"/g' >>$CONFIG_STATUS || ac_write_fail=1
+
+cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
+  for (key in D) D_is_set[key] = 1
+  FS = ""
+}
+/^[\t ]*#[\t ]*(define|undef)[\t ]+$ac_word_re([\t (]|\$)/ {
+  line = \$ 0
+  split(line, arg, " ")
+  if (arg[1] == "#") {
+    defundef = arg[2]
+    mac1 = arg[3]
+  } else {
+    defundef = substr(arg[1], 2)
+    mac1 = arg[2]
+  }
+  split(mac1, mac2, "(") #)
+  macro = mac2[1]
+  prefix = substr(line, 1, index(line, defundef) - 1)
+  if (D_is_set[macro]) {
+    # Preserve the white space surrounding the "#".
+    print prefix "define", macro P[macro] D[macro]
+    next
+  } else {
+    # Replace #undef with comments.  This is necessary, for example,
+    # in the case of _POSIX_SOURCE, which is predefined and required
+    # on some systems where configure will not decide to define it.
+    if (defundef == "undef") {
+      print "/*", prefix defundef, macro, "*/"
+      next
+    }
+  }
+}
+{ print }
+_ACAWK
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
+  as_fn_error "could not setup config headers machinery" "$LINENO" 5
+fi # test -n "$CONFIG_HEADERS"
+
+
+eval set X "  :F $CONFIG_FILES  :H $CONFIG_HEADERS  :L $CONFIG_LINKS  :C $CONFIG_COMMANDS"
 shift
 for ac_tag
 do
@@ -5953,7 +6081,30 @@ which seems to be undefined.  Please make sure it is defined." >&2;}
   esac \
   || as_fn_error "could not create $ac_file" "$LINENO" 5
  ;;
-
+  :H)
+  #
+  # CONFIG_HEADER
+  #
+  if test x"$ac_file" != x-; then
+    {
+      $as_echo "/* $configure_input  */" \
+      && eval '$AWK -f "$tmp/defines.awk"' "$ac_file_inputs"
+    } >"$tmp/config.h" \
+      || as_fn_error "could not create $ac_file" "$LINENO" 5
+    if diff "$ac_file" "$tmp/config.h" >/dev/null 2>&1; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
+$as_echo "$as_me: $ac_file is unchanged" >&6;}
+    else
+      rm -f "$ac_file"
+      mv "$tmp/config.h" "$ac_file" \
+	|| as_fn_error "could not create $ac_file" "$LINENO" 5
+    fi
+  else
+    $as_echo "/* $configure_input  */" \
+      && eval '$AWK -f "$tmp/defines.awk"' "$ac_file_inputs" \
+      || as_fn_error "could not create -" "$LINENO" 5
+  fi
+ ;;
   :L)
   #
   # CONFIG_LINK
diff --git a/libgcc/configure.ac b/libgcc/configure.ac
index 748189393e6..2a93b9e6142 100644
--- a/libgcc/configure.ac
+++ b/libgcc/configure.ac
@@ -39,6 +39,7 @@ else
 fi
 AC_SUBST(libgcc_topdir)
 AC_CONFIG_AUX_DIR($libgcc_topdir)
+AC_CONFIG_HEADER(auto-target.h:config.in)
 
 AC_ARG_ENABLE(shared,
 [  --disable-shared        don't provide a shared libgcc],
@@ -327,6 +328,15 @@ if test "$enable_tls $gcc_cv_use_emutls" = "yes yes"; then
 fi
 AC_SUBST(set_use_emutls)
 
+AC_CACHE_CHECK(for init priority support, libgcc_cv_init_priority, [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,
+  [[void ip (void) __attribute__ ((constructor (1)));]])],
+  [libgcc_cv_init_priority=yes],[libgcc_cv_init_priority=no])])
+if test $libgcc_cv_init_priority = yes; then
+  AC_DEFINE(HAVE_INIT_PRIORITY, 1,
+  [Define if the compiler supports init priority.])
+fi
+
 # Conditionalize the sfp-machine.h header for this target machine.
 if test -z "${sfp_machine_header}"; then
 	sfp_machine_header=$cpu_type/sfp-machine.h