Sync config/ from GCC:

--- config/ChangeLog
+++ config/ChangeLog
@@ -19,6 +19,10 @@
 	* tls.m4 (GCC_CHECK_TLS): Also test TLS in a shared library when
 	cross-compiling.

+2009-06-25  Olivier Hainque  <hainque@adacore.com>
+
+	* config/mh-ppc-aix (BOOT_ADAFLAGS): Remove -mminimal-toc.
+
 2009-05-26  Rafael Avila de Espindola  <espindola@google.com>

 	* plugins.m4: New.
@@ -39,6 +43,27 @@
 	"# no Tcl configs found".
 	(SC_LOAD_TKCONFIG): Similarily for TK_BIN_DIR.

+2009-04-09  Jakub Jelinek  <jakub@redhat.com>
+
+	* lead-dot.m4: Change copyright header to refer to version
+	3 of the GNU General Public License and to point readers at the
+	COPYING3 file and the FSF's license web page.
+	* warnings.m4: Likewise.
+
+2009-02-11  Kai Tietz  <kai.tietz@onevision.com>
+
+	* mh-cygwin (LDFLAGS): Add linker option to increase stack limit
+	up to 8MB.
+
+2009-01-23  Jie Zhang  <jie.zhang@analog.com>
+
+	* tls.m4 (GCC_CHECK_EMUTLS): Define.
+
+2008-12-21  Andrew Pinski  <pinskia@gmail.com>
+
+	PR target/38300
+	* unwind_ipinfo.m4: Darwin before 9 does not have _Unwind_GetIPInfo.
+
 2008-11-21  Kai Tietz  <kai.tietz@onevision.com>

 	Fix PR/25502

config/tls.m4

@@ -104,3 +104,21 @@ AC_DEFUN([GCC_CHECK_CC_TLS], [
     AC_DEFINE(HAVE_CC_TLS, 1,
 	      [Define to 1 if the target assembler supports thread-local storage.])
   fi])
+
+dnl Check whether TLS is emulated.
+AC_DEFUN([GCC_CHECK_EMUTLS], [
+  AC_CACHE_CHECK([whether the thread-local storage support is from emutls],
+  		 gcc_cv_use_emutls, [
+    gcc_cv_use_emutls=no
+    echo '__thread int a; int b; int main() { return a = b; }' > conftest.c
+    if AC_TRY_COMMAND(${CC-cc} -Werror -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD); then
+      if grep __emutls_get_address conftest.s > /dev/null; then
+	gcc_cv_use_emutls=yes
+      fi
+    fi
+    rm -f conftest.*
+    ])
+  if test "$gcc_cv_use_emutls" = "yes" ; then
+    AC_DEFINE(USE_EMUTLS, 1,
+      	      [Define to 1 if the target use emutls for thread-local storage.])
+  fi])