diff --git a/configure b/configure
index d8d5edf..ad33c34 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 1.410 .
+# From configure.in Revision: 1.411 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.53 for python 2.3.
 #
@@ -3949,6 +3949,68 @@
 echo "${ECHO_T}$ac_cv_kthread" >&6
 fi
 
+if test $ac_cv_kthread = no
+then
+# -pthread, if available, provides the right #defines
+# and linker options to make pthread_create available
+# Some compilers won't report that they do not support -pthread,
+# so we need to run a program to see whether it really made the
+# function available.
+echo "$as_me:$LINENO: checking whether $CC accepts -pthread" >&5
+echo $ECHO_N "checking whether $CC accepts -pthread... $ECHO_C" >&6
+if test "${ac_cv_thread+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_save_cc="$CC"
+CC="$CC -pthread"
+if test "$cross_compiling" = yes; then
+  ac_cv_pthread=no
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+
+#include <pthread.h>
+
+void* routine(void* p){return NULL;}
+
+int main(){
+  pthread_t p;
+  if(pthread_create(&p,NULL,routine,NULL)!=0)
+    return 1;
+  (void)pthread_detach(p);
+  return 0;
+}
+
+_ACEOF
+rm -f conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_pthread=yes
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+( exit $ac_status )
+ac_cv_pthread=no
+fi
+rm -f core core.* *.core conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+CC="$ac_save_cc"
+fi
+
+echo "$as_me:$LINENO: result: $ac_cv_pthread" >&5
+echo "${ECHO_T}$ac_cv_pthread" >&6
+fi
+
 
 # checks for header files
 echo "$as_me:$LINENO: checking for ANSI C header files" >&5
@@ -9202,6 +9264,8 @@
 then CC="$CC -Kpthread"
 elif test "$ac_cv_kthread" = "yes"
 then CC="$CC -Kthread"
+elif test "$ac_cv_pthread" = "yes"
+then CC="$CC -pthread"
 fi
 echo "$as_me:$LINENO: checking for pthread_t" >&5
 echo $ECHO_N "checking for pthread_t... $ECHO_C" >&6
@@ -10222,6 +10286,15 @@
 
     posix_threads=yes
     THREADOBJ="Python/thread.o"
+elif test "$ac_cv_pthread" = "yes"
+then
+    CC="$CC -pthread"
+    cat >>confdefs.h <<\_ACEOF
+#define WITH_THREAD 1
+_ACEOF
+
+    posix_threads=yes
+    THREADOBJ="Python/thread.o"
 else
     if test ! -z "$with_threads" -a -d "$with_threads"
     then LDFLAGS="$LDFLAGS -L$with_threads"
@@ -11232,159 +11305,6 @@
 
 
 
-    if test "$posix_threads" = "yes"; then
-      if test "$unistd_defines_pthreads" = "no"; then
-
-cat >>confdefs.h <<\_ACEOF
-#define _POSIX_THREADS 1
-_ACEOF
-
-      fi
-
-      # Bug 662787: Using semaphores causes unexplicable hangs on Solaris 8.
-      case  $ac_sys_system/$ac_sys_release in
-      SunOS/5.8)
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_BROKEN_POSIX_SEMAPHORES 1
-_ACEOF
-;;
-      esac
-
-      echo "$as_me:$LINENO: checking if PTHREAD_SCOPE_SYSTEM is supported" >&5
-echo $ECHO_N "checking if PTHREAD_SCOPE_SYSTEM is supported... $ECHO_C" >&6
-      if test "${ac_cv_pthread_system_supported+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  if test "$cross_compiling" = yes; then
-  ac_cv_pthread_system_supported=no
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-#include <pthread.h>
-      void *foo(void *parm) {
-        return NULL;
-      }
-      main() {
-        pthread_attr_t attr;
-        pthread_t id;
-        if (pthread_attr_init(&attr)) exit(-1);
-        if (pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM)) exit(-1);
-        if (pthread_create(&id, &attr, foo, NULL)) exit(-1);
-        exit(0);
-      }
-_ACEOF
-rm -f conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_pthread_system_supported=yes
-else
-  echo "$as_me: program exited with status $ac_status" >&5
-echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-( exit $ac_status )
-ac_cv_pthread_system_supported=no
-fi
-rm -f core core.* *.core conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
-fi
-
-fi
-
-      echo "$as_me:$LINENO: result: $ac_cv_pthread_system_supported" >&5
-echo "${ECHO_T}$ac_cv_pthread_system_supported" >&6
-      if test "$ac_cv_pthread_system_supported" = "yes"; then
-
-cat >>confdefs.h <<\_ACEOF
-#define PTHREAD_SYSTEM_SCHED_SUPPORTED 1
-_ACEOF
-
-      fi
-
-for ac_func in pthread_sigmask
-do
-as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
-echo "$as_me:$LINENO: checking for $ac_func" >&5
-echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6
-if eval "test \"\${$as_ac_var+set}\" = set"; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char $ac_func (); below.  */
-#include <assert.h>
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char $ac_func ();
-char (*f) ();
-
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
-choke me
-#else
-f = $ac_func;
-#endif
-
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  eval "$as_ac_var=yes"
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-eval "$as_ac_var=no"
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_var'}'`" >&5
-echo "${ECHO_T}`eval echo '${'$as_ac_var'}'`" >&6
-if test `eval echo '${'$as_ac_var'}'` = yes; then
-  cat >>confdefs.h <<_ACEOF
-#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
-
-fi
-done
-
-    fi
-
     echo "$as_me:$LINENO: checking for usconfig in -lmpc" >&5
 echo $ECHO_N "checking for usconfig in -lmpc... $ECHO_C" >&6
 if test "${ac_cv_lib_mpc_usconfig+set}" = set; then
@@ -11527,19 +11447,169 @@
         OSF1) LDLAST=-threads;;
         esac
     fi
+fi
 
-    if test "$posix_threads" = yes -a \
-		"$ac_sys_system" = "SunOS" -a \
-		"$ac_sys_release" = "5.6"; then
+if test "$posix_threads" = "yes"; then
+      if test "$unistd_defines_pthreads" = "no"; then
 
 cat >>confdefs.h <<\_ACEOF
+#define _POSIX_THREADS 1
+_ACEOF
+
+      fi
+
+      # Bug 662787: Using semaphores causes unexplicable hangs on Solaris 8.
+      case  $ac_sys_system/$ac_sys_release in
+  SunOS/5.6)
+cat >>confdefs.h <<\_ACEOF
 #define HAVE_PTHREAD_DESTRUCTOR 1
 _ACEOF
 
-	fi
+		       ;;
+      SunOS/5.8)
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_BROKEN_POSIX_SEMAPHORES 1
+_ACEOF
+
+		       ;;
+      esac
+
+      echo "$as_me:$LINENO: checking if PTHREAD_SCOPE_SYSTEM is supported" >&5
+echo $ECHO_N "checking if PTHREAD_SCOPE_SYSTEM is supported... $ECHO_C" >&6
+      if test "${ac_cv_pthread_system_supported+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test "$cross_compiling" = yes; then
+  ac_cv_pthread_system_supported=no
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+#include <pthread.h>
+      void *foo(void *parm) {
+        return NULL;
+      }
+      main() {
+        pthread_attr_t attr;
+        pthread_t id;
+        if (pthread_attr_init(&attr)) exit(-1);
+        if (pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM)) exit(-1);
+        if (pthread_create(&id, &attr, foo, NULL)) exit(-1);
+        exit(0);
+      }
+_ACEOF
+rm -f conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_pthread_system_supported=yes
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+( exit $ac_status )
+ac_cv_pthread_system_supported=no
+fi
+rm -f core core.* *.core conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
 
 fi
 
+      echo "$as_me:$LINENO: result: $ac_cv_pthread_system_supported" >&5
+echo "${ECHO_T}$ac_cv_pthread_system_supported" >&6
+      if test "$ac_cv_pthread_system_supported" = "yes"; then
+
+cat >>confdefs.h <<\_ACEOF
+#define PTHREAD_SYSTEM_SCHED_SUPPORTED 1
+_ACEOF
+
+      fi
+
+for ac_func in pthread_sigmask
+do
+as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
+echo "$as_me:$LINENO: checking for $ac_func" >&5
+echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6
+if eval "test \"\${$as_ac_var+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func (); below.  */
+#include <assert.h>
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char $ac_func ();
+char (*f) ();
+
+#ifdef F77_DUMMY_MAIN
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int F77_DUMMY_MAIN() { return 1; }
+#endif
+int
+main ()
+{
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
+choke me
+#else
+f = $ac_func;
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  eval "$as_ac_var=yes"
+else
+  echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+eval "$as_ac_var=no"
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_var'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_var'}'`" >&6
+if test `eval echo '${'$as_ac_var'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+done
+
+fi
+
+
 # Check for enable-ipv6
 
 
@@ -12592,6 +12662,48 @@
 fi
 rm -f conftest.$ac_objext conftest.$ac_ext
 
+for ac_prog in true
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_TRUE+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$TRUE"; then
+  ac_cv_prog_TRUE="$TRUE" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_TRUE="$ac_prog"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+TRUE=$ac_cv_prog_TRUE
+if test -n "$TRUE"; then
+  echo "$as_me:$LINENO: result: $TRUE" >&5
+echo "${ECHO_T}$TRUE" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  test -n "$TRUE" && break
+done
+test -n "$TRUE" || TRUE="/bin/true"
+
+
 echo "$as_me:$LINENO: checking for inet_aton in -lc" >&5
 echo $ECHO_N "checking for inet_aton in -lc... $ECHO_C" >&6
 if test "${ac_cv_lib_c_inet_aton+set}" = set; then
@@ -12648,7 +12760,7 @@
 echo "$as_me:$LINENO: result: $ac_cv_lib_c_inet_aton" >&5
 echo "${ECHO_T}$ac_cv_lib_c_inet_aton" >&6
 if test $ac_cv_lib_c_inet_aton = yes; then
-  /bin/true
+  $ac_cv_prog_TRUE
 else
 
 echo "$as_me:$LINENO: checking for inet_aton in -lresolv" >&5
@@ -18074,6 +18186,7 @@
 s,@DLINCLDIR@,$DLINCLDIR,;t t
 s,@DYNLOADFILE@,$DYNLOADFILE,;t t
 s,@MACHDEP_OBJS@,$MACHDEP_OBJS,;t t
+s,@TRUE@,$TRUE,;t t
 s,@LIBOBJS@,$LIBOBJS,;t t
 s,@HAVE_GETHOSTBYNAME_R_6_ARG@,$HAVE_GETHOSTBYNAME_R_6_ARG,;t t
 s,@HAVE_GETHOSTBYNAME_R_5_ARG@,$HAVE_GETHOSTBYNAME_R_5_ARG,;t t