Patch #418659: Fixes for UnixWare and ReliantUnix.

back-out 1.215 of configure.in and 1.34 of Makefile.pre.in
Check for -Kpthread compiler support, and use this as the sole option
for MT if available.

Makefile.pre.in

@@ -314,7 +314,7 @@ $(LIBRARY): $(LIBRARY_OBJS)
 	$(AR) cr $@ $(MODOBJS)
 	$(RANLIB) $@
 
-# This rule is only here for DG/UX, UnixWare, and BeOS!!!
+# This rule is only here for DG/UX and BeOS!!!
 libpython$(VERSION).so:	$(LIBRARY)
 	case `uname -s | tr -d '/ ' | tr '[A-Z]' '[a-z]'` in \
 	*dgux*) \
@@ -322,9 +322,6 @@ libpython$(VERSION).so:	$(LIBRARY)
 	    (cd dgux;ar x ../$^;ld -G -o ../$@ * ); \
 	    /bin/rm -rf ./dgux \
 	    ;; \
-	unixware*) \
-	    $(LDSHARED) -o $@ $(LIBRARY_OBJS) \
-	    ;; \
 	beos) \
 	    $(AR) so $(LIBRARY) $@ \
 	    ;; \

configure.in

@@ -52,9 +52,7 @@ AC_MSG_CHECKING(MACHDEP)
 if test -z "$MACHDEP"
 then
 	ac_sys_system=`uname -s`
-	if test "$ac_sys_system" = "AIX" -o \
-		"$ac_sys_system" = "Monterey64" -o \
-		"$ac_sys_system" = "UnixWare"; then
+	if test "$ac_sys_system" = "AIX" -o "$ac_sys_system" = "Monterey64"; then
 		ac_sys_release=`uname -v`
 	else
 		ac_sys_release=`uname -r`
@@ -127,15 +125,8 @@ AC_ARG_WITH(gcc, [  --without-gcc                   never use gcc], [
 		;;
     Monterey*)
         RANLIB=:
-	    without_gcc=
-	    ;;
-	UnixWare*)
-	    RANLIB=:
-	    without_gcc=
-	    ;;
-	*)
-	    without_gcc=no
-	    ;;
+        without_gcc=;;
+	*)	without_gcc=no;;
 	esac])
 AC_MSG_RESULT($without_gcc)
 
@@ -273,9 +264,6 @@ cygwin*)
       LDLIBRARY='libpython$(VERSION).dll.a'
       DLLLIBRARY='libpython$(VERSION).dll'
       ;;
-unixware*)
-      LDLIBRARY='libpython$(VERSION).so'
-      ;;
 esac
 AC_MSG_RESULT($LDLIBRARY)
 
@@ -530,6 +518,24 @@ if test "$ipv6" = "yes" -a "$ipv6lib" != "none"; then
 	fi
 fi
 
+# -Kpthread, if available, provides the right #defines
+# and linker options to make pthread_create available
+AC_MSG_CHECKING(whether $CC accepts -Kpthread)
+AC_CACHE_VAL(ac_cv_kpthread,
+[ac_save_cc="$CC"
+CC="$CC -Kpthread"
+AC_TRY_LINK([#include <pthread.h>],[pthread_create(0,0,0,0)],
+  ac_cv_kpthread=yes,
+  ac_cv_kpthread=no)
+CC="$ac_save_cc"])
+
+# GCC does not reject -Kpthread as an illegal option, it merely complains that
+# it is unrecognized
+if test "$GCC" = "yes"
+then ac_cv_kpthread="no, we have gcc"
+fi
+AC_MSG_RESULT($ac_cv_kpthread)
+
 dnl # check for ANSI or K&R ("traditional") preprocessor
 dnl AC_MSG_CHECKING(for C preprocessor type)
 dnl AC_TRY_COMPILE([
@@ -779,7 +785,7 @@ then
 	UnixWare*)
 		if test "$GCC" = "yes"
 		then LDSHARED="$(CC) -shared"
-		else LDSHARED="ld -G -dy -Bdynamic"
+		else LDSHARED="$(CC) -G"
 		fi;;
 	SCO_SV*) LDSHARED="cc -G -KPIC -Ki486 -belf -Wl,-Bexport";;
 	Monterey*) LDSHARED="cc -G -dy -Bdynamic -Bexport -L/usr/lib/ia64l64";;
@@ -809,7 +815,7 @@ then
 	UnixWare*)
 		if test "$GCC" = "yes"
 		then CCSHARED="-fPIC"
-		else CCSHARED="-KPIC -G -dy -Bdynamic"
+		else CCSHARED="-KPIC"
 		fi;;
 	SCO_SV*) CCSHARED="-KPIC -dy -Bdynamic";;
 	Monterey*) CCSHARED="-G";;
@@ -840,7 +846,7 @@ then
 	# loading of any modules which reference it in System.framework
 	next/4*|next/5*) LINKFORSHARED="-u __dummy -framework System" ;;
 	Darwin/*) LINKFORSHARED="-u __dummy -u _PyMac_Error -framework System -framework Foundation -framework Carbon" ;;
-	UnixWare*) LINKFORSHARED="-dy -Bdynamic -Wl,-Bexport";;
+	UnixWare*) LINKFORSHARED="-Wl,-Bexport";;
 	SCO_SV*) LINKFORSHARED="-Bdynamic -dy -Wl,-Bexport";;
 	ReliantUNIX*) LINKFORSHARED="-W1 -Blargedynsym";;
 	FreeBSD*|NetBSD*) 
@@ -964,15 +970,13 @@ AC_MSG_RESULT($with_threads)
 if test "$with_threads" = "no"
 then
     USE_THREAD_MODULE="#"
-else
-    if test "$ac_sys_system" = "UnixWare"
-     then
-	CC="${CC} -Kthread"
-	LIBOBJS="$LIBOBJS thread.o"
+elif test "$ac_cv_kpthread" = "yes"
+then
+    CC="$CC -Kpthread"
     AC_DEFINE(WITH_THREAD)
     AC_DEFINE(_POSIX_THREADS)
-	USE_THREAD_MODULE=""
-    else
+    LIBOBJS="$LIBOBJS thread.o"
+else
     if test ! -z "$with_threads" -a -d "$with_threads"
     then LDFLAGS="$LDFLAGS -L$with_threads"
     fi
@@ -1045,7 +1049,6 @@ else
         OSF1) LDLAST=-threads;;
         esac
     fi
-    fi
 fi
 
 # Check for GC support