Merged revisions 78073 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r78073 | ronald.oussoren | 2010-02-07 13:03:42 +0100 (Sun, 07 Feb 2010) | 7 lines

  * Checks that the SDK specified with --enable-universalsk=VALUE exists.

  * Fall back to the default system SDK when specifying --enable-universalsk
    without a value and the 10.4u SDK is not avaiable.

  Port of fix for issue 4834 from the trunk.
........

configure.in

@@ -78,12 +78,17 @@ define_xopen_source=yes
 AC_SUBST(CONFIG_ARGS)
 CONFIG_ARGS="$ac_configure_args"
 
+AC_MSG_CHECKING([for --enable-universalsdk])
 AC_ARG_ENABLE(universalsdk,
 	AC_HELP_STRING(--enable-universalsdk@<:@=SDKDIR@:>@, Build against Mac OS X 10.4u SDK (ppc/i386)),
 [
 	case $enableval in
 	yes)
 		enableval=/Developer/SDKs/MacOSX10.4u.sdk
+		if test ! -d "${enableval}"
+		then
+			enableval=/
+		fi
 		;;
 	esac
 	case $enableval in
@@ -93,12 +98,23 @@ AC_ARG_ENABLE(universalsdk,
 		;;
 	*)
 		UNIVERSALSDK=$enableval
+		if test ! -d "${UNIVERSALSDK}"
+		then
+			AC_MSG_ERROR([--enable-universalsdk specifies non-existing SDK: ${UNIVERSALSDK}])
+		fi
 		;;
 	esac
+	
 ],[
    	UNIVERSALSDK=
 	enable_universalsdk=
 ])
+if test -n "${UNIVERSALSDK}"
+then
+	AC_MSG_RESULT(${UNIVERSALSDK})
+else
+	AC_MSG_RESULT(no)
+fi
 AC_SUBST(UNIVERSALSDK)
 
 AC_SUBST(ARCH_RUN_32BIT)