Index: configure
===================================================================
RCS file: /cvsroot/python/python/dist/src/configure,v
retrieving revision 1.353
diff -u -r1.353 configure
--- configure	7 Nov 2002 07:42:28 -0000	1.353
+++ configure	10 Nov 2002 00:03:12 -0000
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 1.363 .
+# From configure.in Revision: 1.364 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.53 for python 2.3.
 #
@@ -1254,10 +1254,8 @@
 # of _XOPEN_SOURCE. So define it only conditionally.
 
 
-cat >>confdefs.h <<\_ACEOF
-#define _XOPEN_SOURCE 500
-_ACEOF
 
+define_xopen_source=yes
 
 # On Tru64 Unix 4.0F, defining _XOPEN_SOURCE also requires definition
 # of _XOPEN_SOURCE_EXTENDED and _POSIX_C_SOURCE, or else several APIs
@@ -1345,6 +1343,30 @@
 	atheos*) MACHDEP="atheos";;
 	'')	MACHDEP="unknown";;
 	esac
+fi
+
+# Some systems cannot stand _XOPEN_SOURCE being defined at all; they
+# disable features if it is defined, without any means to access these
+# features as extensions. For these systems, we skip the definition of
+# _XOPEN_SOURCE. Before adding a system to the list to gain access to
+# some feature, make sure there is no alternative way to access this
+# feature. Also, when using wildcards, make sure you have verified the
+# need for not defining _XOPEN_SOURCE on all systems matching the
+# wildcard, and that the wildcard does not include future systems
+# (which may remove their limitations).
+case $ac_sys_system/$ac_sys_release in
+  # On OpenBSD, select(2) is not available if _XOPEN_SOURCE is defined,
+  # even though select is a POSIX function. Reported by J. Ribbens.
+  OpenBSD/2.* | OpenBSD/3.[012])
+    define_xopen_source=no;;
+esac
+
+if test $define_xopen_source=yes
+then
+  cat >>confdefs.h <<\_ACEOF
+#define _XOPEN_SOURCE 500
+_ACEOF
+
 fi
 
 #
Index: configure.in
===================================================================
RCS file: /cvsroot/python/python/dist/src/configure.in,v
retrieving revision 1.364
diff -u -r1.364 configure.in
--- configure.in	7 Nov 2002 07:42:30 -0000	1.364
+++ configure.in	10 Nov 2002 00:03:13 -0000
@@ -33,9 +33,10 @@
 AH_VERBATIM([_XOPEN_SOURCE],
 [/* Define on UNIX to activate XPG/5 features.  */
 #ifndef _XOPEN_SOURCE
-# define _XOPEN_SOURCE 500
+# undef _XOPEN_SOURCE
 #endif])
-AC_DEFINE(_XOPEN_SOURCE, 500)
+
+define_xopen_source=yes
 
 # On Tru64 Unix 4.0F, defining _XOPEN_SOURCE also requires definition
 # of _XOPEN_SOURCE_EXTENDED and _POSIX_C_SOURCE, or else several APIs
@@ -111,6 +112,28 @@
 	atheos*) MACHDEP="atheos";;
 	'')	MACHDEP="unknown";;
 	esac
+fi
+
+# Some systems cannot stand _XOPEN_SOURCE being defined at all; they
+# disable features if it is defined, without any means to access these
+# features as extensions. For these systems, we skip the definition of
+# _XOPEN_SOURCE. Before adding a system to the list to gain access to
+# some feature, make sure there is no alternative way to access this
+# feature. Also, when using wildcards, make sure you have verified the
+# need for not defining _XOPEN_SOURCE on all systems matching the
+# wildcard, and that the wildcard does not include future systems
+# (which may remove their limitations).
+dnl quadrigraphs "@<:@" and "@:>@" produce "[" and "]" in the output
+case $ac_sys_system/$ac_sys_release in
+  # On OpenBSD, select(2) is not available if _XOPEN_SOURCE is defined,
+  # even though select is a POSIX function. Reported by J. Ribbens.
+  OpenBSD/2.* | OpenBSD/3.@<:@012@:>@) 
+    define_xopen_source=no;;
+esac
+
+if test $define_xopen_source=yes
+then
+  AC_DEFINE(_XOPEN_SOURCE, 500)
 fi
 
 #
Index: pyconfig.h.in
===================================================================
RCS file: /cvsroot/python/python/dist/src/pyconfig.h.in,v
retrieving revision 1.56
diff -u -r1.56 pyconfig.h.in
--- pyconfig.h.in	26 Oct 2002 13:33:00 -0000	1.56
+++ pyconfig.h.in	10 Nov 2002 00:03:13 -0000
@@ -799,7 +799,7 @@
 
 /* Define on UNIX to activate XPG/5 features.  */
 #ifndef _XOPEN_SOURCE
-# define _XOPEN_SOURCE 500
+# undef _XOPEN_SOURCE
 #endif
 
 /* Define to activate Unix95-and-earlier features */