gh-157949: Remove dead UnixWare, OpenServer and ReliantUNIX support code

Author: vasiliyk

Lib/test/test_fcntl.py

@@ -73,7 +73,7 @@ def get_lockdata():
                                    fcntl.F_WRLCK, 0)
         elif sys.platform.startswith('gnukfreebsd'):
             lockdata = struct.pack('qqihhi', 0, 0, 0, fcntl.F_WRLCK, 0, 0)
-        elif sys.platform in ['hp-uxB', 'unixware7']:
+        elif sys.platform == 'hp-uxB':
             lockdata = struct.pack('hhlllii', fcntl.F_WRLCK, 0, 0, 0, 0, 0, 0)
         else:
             lockdata = struct.pack('hh'+start_len+'hh', fcntl.F_WRLCK, 0, 0, 0, 0, 0)

Misc/NEWS.d/next/Build/2026-09-22-09-13-06.gh-issue-157949.EZ8avp.rst

@@ -0,0 +1,2 @@
+Remove dead build and preprocessor code for SCO UnixWare, OpenUNIX, SCO
+OpenServer and ReliantUNIX.

Modules/_cursesmodule.c

@@ -120,7 +120,7 @@ static const char PyCursesVersion[] = "2.2";
 #include <langinfo.h>
 #endif
 
-#if !defined(NCURSES_VERSION) && (defined(sgi) || defined(__sun) || defined(SCO5))
+#if !defined(NCURSES_VERSION) && (defined(sgi) || defined(__sun))
 #define STRICT_SYSV_CURSES       /* Don't use ncurses extensions */
 typedef chtype attr_t;           /* No attr_t type is available */
 #endif

Modules/posixmodule.c

@@ -14111,11 +14111,6 @@ os_WSTOPSIG_impl(PyObject *module, int status)
 
 
 #if defined(HAVE_FSTATVFS) && defined(HAVE_SYS_STATVFS_H)
-#ifdef _SCO_DS
-/* SCO OpenServer 5.0 and later requires _SVID3 before it reveals the
-   needed definitions in sys/statvfs.h */
-#define _SVID3
-#endif
 #include <sys/statvfs.h>
 
 #ifdef __APPLE__

configure

@@ -238,11 +238,6 @@ AH_TOP([
 #define Py_PYCONFIG_H
 ])
 AH_BOTTOM([
-/* Define the macros needed if on a UnixWare 7.x system. */
-#if defined(__USLC__) && defined(__SCO_VERSION__)
-#define STRICT_SYSV_CURSES /* Don't use ncurses extensions */
-#endif
-
 #endif /*Py_PYCONFIG_H*/
 ])
 
@@ -368,8 +363,7 @@ then
 	ac_sys_release=
     else
 	ac_sys_system=`uname -s`
-	if test "$ac_sys_system" = "AIX" \
-	-o "$ac_sys_system" = "UnixWare" -o "$ac_sys_system" = "OpenUNIX"; then
+	if test "$ac_sys_system" = "AIX"; then
 		ac_sys_release=`uname -v`
 	else
 		ac_sys_release=`uname -r`
@@ -873,15 +867,6 @@ case $ac_sys_system/$ac_sys_release in
   # A lower level is defined below.
   SunOS/*)
     define_xopen_source=no;;
-  # On UnixWare 7, u_long is never defined with _XOPEN_SOURCE,
-  # but used in /usr/include/netinet/tcp.h. Reported by Tim Rice.
-  # Reconfirmed for 7.1.4 by Martin v. Loewis.
-  OpenUNIX/8.0.0| UnixWare/7.1.@<:@0-4@:>@)
-    define_xopen_source=no;;
-  # On OpenServer 5, u_short is never defined with _XOPEN_SOURCE,
-  # but used in struct sockaddr.sa_family. Reported by Tim Rice.
-  SCO_SV/3.2)
-    define_xopen_source=no;;
   # On MacOS X 10.2, a bug in ncurses.h means that it craps out if
   # _XOPEN_EXTENDED_SOURCE is defined. Apparently, this is fixed in 10.3, which
   # identifies itself as Darwin/7.*
@@ -2417,11 +2402,6 @@ then
 	    OPT="-O3 -Wall"
 	    ;;
 	esac
-
-	case $ac_sys_system in
-	    SCO_SV*) OPT="$OPT -m486 -DSCO5"
-	    ;;
-        esac
 	;;
 
     *)
@@ -2789,10 +2769,6 @@ AS_VAR_IF([ac_cv_gcc_compat], [yes], [
     esac
 
     case $ac_sys_system in
-	SCO_SV*)
-	    BASECFLAGS="$BASECFLAGS -m486 -DSCO5"
-	    ;;
-
     Darwin*)
         # -Wno-long-double, -no-cpp-precomp, and -mno-fused-madd
         # used to be here, but non-Apple gcc doesn't accept them.
@@ -2946,15 +2922,6 @@ AS_VAR_IF([ac_cv_gcc_compat], [yes], [
         # end of Darwin* tests
         ;;
     esac
-], [
-    case $ac_sys_system in
-    OpenUNIX*|UnixWare*)
-	BASECFLAGS="$BASECFLAGS -K pentium,host,inline,loop_unroll,alloca "
-	;;
-    SCO_SV*)
-	BASECFLAGS="$BASECFLAGS -belf -Ki486 -DSCO5"
-	;;
-    esac
 ])
 
 # Check for --enable-experimental-jit:
@@ -3336,13 +3303,6 @@ AC_DEFINE([_FILE_OFFSET_BITS], [64],
 [This must be set to 64 on some systems to enable large file support.])
 fi
 
-# Add some code to confdefs.h so that the test for off_t works on SCO
-cat >> confdefs.h <<\EOF
-#if defined(SCO_DS)
-#undef _OFF_T
-#endif
-EOF
-
 # Type availability checks
 AC_TYPE_MODE_T
 AC_TYPE_OFF_T
@@ -3723,17 +3683,6 @@ then
 	NetBSD*|DragonFly*)
 		LDSHARED='$(CC) -shared'
 		LDCXXSHARED='$(CXX) -shared';;
-	OpenUNIX*|UnixWare*)
-		if test "$ac_cv_gcc_compat" = "yes" ; then
-			LDSHARED='$(CC) -shared'
-			LDCXXSHARED='$(CXX) -shared'
-		else
-			LDSHARED='$(CC) -G'
-			LDCXXSHARED='$(CXX) -G'
-		fi;;
-	SCO_SV*)
-		LDSHARED='$(CC) -Wl,-G,-Bexport'
-		LDCXXSHARED='$(CXX) -Wl,-G,-Bexport';;
 	WASI*)
 		AS_VAR_IF([enable_wasm_dynamic_linking], [yes], [
 			dnl not implemented yet
@@ -3781,16 +3730,6 @@ then
 		]);;
 	FreeBSD*|NetBSD*|OpenBSD*|DragonFly*) CCSHARED="-fPIC";;
 	Haiku*) CCSHARED="-fPIC";;
-	OpenUNIX*|UnixWare*)
-		if test "$ac_cv_gcc_compat" = "yes"
-		then CCSHARED="-fPIC"
-		else CCSHARED="-KPIC"
-		fi;;
-	SCO_SV*)
-		if test "$ac_cv_gcc_compat" = "yes"
-		then CCSHARED="-fPIC"
-		else CCSHARED="-Kpic -belf"
-		fi;;
 	VxWorks*)
 		CCSHARED="-fpic -D__SO_PICABILINUX__  -ftls-model=global-dynamic"
 	esac
@@ -3841,9 +3780,6 @@ then
 			fi
 		fi
 		;;
-	OpenUNIX*|UnixWare*) LINKFORSHARED="-Wl,-Bexport";;
-	SCO_SV*) LINKFORSHARED="-Wl,-Bexport";;
-	ReliantUNIX*) LINKFORSHARED="-W1 -Blargedynsym";;
 	FreeBSD*|NetBSD*|OpenBSD*|DragonFly*)
 		if [[ "`$CC -dM -E - </dev/null | grep __ELF__`" != "" ]]
 		then

configure.ac

@@ -2282,10 +2282,5 @@
 #undef uid_t
 
 
-/* Define the macros needed if on a UnixWare 7.x system. */
-#if defined(__USLC__) && defined(__SCO_VERSION__)
-#define STRICT_SYSV_CURSES /* Don't use ncurses extensions */
-#endif
-
 #endif /*Py_PYCONFIG_H*/