Unsupport --without-universal-newlines.
diff --git a/configure.in b/configure.in
index f41b11d..c6fd6a1 100644
--- a/configure.in
+++ b/configure.in
@@ -1606,7 +1606,9 @@
if test -z "$with_universal_newlines"
then with_universal_newlines="yes"
fi
-if test "$with_universal_newlines" != "no"
+if test "$with_universal_newlines" = "no"
+ echo --without-universal-newlines is unsupported, see README
+ exit 1
then
AC_DEFINE(WITH_UNIVERSAL_NEWLINES, 1,
[Define if you want to read files with foreign newlines.])