Patch #805604: Do not check for sem_init, do not use -Kthread,

if configured --without-threads. Backported to 2.3.

configure

 #! /bin/sh
-# From configure.in Revision: 1.431 .
+# From configure.in Revision: 1.432 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.57 for python 2.4.
 #
@@ -4458,13 +4458,11 @@ then
     ac_cv_cxx_thread=yes
   else
     ac_cv_cxx_thread=no
-    CXX="$ac_save_cxx"
   fi
   rm -fr conftest*
-else
- CXX="$ac_save_cxx"
 fi
 fi
+CXX="$ac_save_cxx"
 echo "$as_me:$LINENO: result: $ac_cv_cxx_thread" >&5
 echo "${ECHO_T}$ac_cv_cxx_thread" >&6
 
@@ -10374,7 +10372,10 @@ _ACEOF
 
 fi
 	# Dynamic linking for HP-UX
-echo "$as_me:$LINENO: checking for library containing sem_init" >&5
+
+# only check for sem_ini if thread support is requested
+if test "$with_threads" = "yes" -o -z "$with_threads"; then
+    echo "$as_me:$LINENO: checking for library containing sem_init" >&5
 echo $ECHO_N "checking for library containing sem_init... $ECHO_C" >&6
 if test "${ac_cv_search_sem_init+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
@@ -10482,6 +10483,8 @@ fi
  # 'Real Time' functions on Solaris
 						# posix4 on Solaris 2.6
 						# pthread (first!) on Linux
+fi
+
 # check if we need libintl for locale functions
 echo "$as_me:$LINENO: checking for textdomain in -lintl" >&5
 echo $ECHO_N "checking for textdomain in -lintl... $ECHO_C" >&6
@@ -10900,6 +10903,9 @@ _ACEOF
 elif test "$ac_cv_kpthread" = "yes"
 then
     CC="$CC -Kpthread"
+    if test "$ac_cv_cxx_thread" = "yes"; then
+        CXX="$CXX -Kpthread"
+    fi
     cat >>confdefs.h <<\_ACEOF
 #define WITH_THREAD 1
 _ACEOF
@@ -10909,6 +10915,9 @@ _ACEOF
 elif test "$ac_cv_kthread" = "yes"
 then
     CC="$CC -Kthread"
+    if test "$ac_cv_cxx_thread" = "yes"; then
+        CXX="$CXX -Kthread"
+    fi
     cat >>confdefs.h <<\_ACEOF
 #define WITH_THREAD 1
 _ACEOF
@@ -10918,6 +10927,9 @@ _ACEOF
 elif test "$ac_cv_pthread" = "yes"
 then
     CC="$CC -pthread"
+    if test "$ac_cv_cxx_thread" = "yes"; then
+        CXX="$CXX -pthread"
+    fi
     cat >>confdefs.h <<\_ACEOF
 #define WITH_THREAD 1
 _ACEOF

configure.in

@@ -897,13 +897,11 @@ then
     ac_cv_cxx_thread=yes
   else
     ac_cv_cxx_thread=no
-    CXX="$ac_save_cxx"
   fi
   rm -fr conftest*
-else
- CXX="$ac_save_cxx"
 fi
 fi
+CXX="$ac_save_cxx"
 AC_MSG_RESULT($ac_cv_cxx_thread)
 
 dnl # check for ANSI or K&R ("traditional") preprocessor
@@ -1422,9 +1420,14 @@ AC_MSG_RESULT($SHLIBS)
 # checks for libraries
 AC_CHECK_LIB(dl, dlopen)	# Dynamic linking for SunOS/Solaris and SYSV
 AC_CHECK_LIB(dld, shl_load)	# Dynamic linking for HP-UX
-AC_SEARCH_LIBS(sem_init, pthread rt posix4) # 'Real Time' functions on Solaris
+
+# only check for sem_ini if thread support is requested
+if test "$with_threads" = "yes" -o -z "$with_threads"; then
+    AC_SEARCH_LIBS(sem_init, pthread rt posix4) # 'Real Time' functions on Solaris
 						# posix4 on Solaris 2.6
 						# pthread (first!) on Linux
+fi
+
 # check if we need libintl for locale functions
 AC_CHECK_LIB(intl, textdomain,
 	AC_DEFINE(WITH_LIBINTL, 1,
@@ -1542,18 +1545,27 @@ then
 elif test "$ac_cv_kpthread" = "yes"
 then
     CC="$CC -Kpthread"
+    if test "$ac_cv_cxx_thread" = "yes"; then
+        CXX="$CXX -Kpthread"
+    fi
     AC_DEFINE(WITH_THREAD)
     posix_threads=yes
     THREADOBJ="Python/thread.o"
 elif test "$ac_cv_kthread" = "yes"
 then
     CC="$CC -Kthread"
+    if test "$ac_cv_cxx_thread" = "yes"; then
+        CXX="$CXX -Kthread"
+    fi
     AC_DEFINE(WITH_THREAD)
     posix_threads=yes
     THREADOBJ="Python/thread.o"
 elif test "$ac_cv_pthread" = "yes"
 then
     CC="$CC -pthread"
+    if test "$ac_cv_cxx_thread" = "yes"; then
+        CXX="$CXX -pthread"
+    fi
     AC_DEFINE(WITH_THREAD)
     posix_threads=yes
     THREADOBJ="Python/thread.o"