add warning

diff --git a/m4/regex.m4 b/m4/regex.m4
index a9c2383..001d203 100644 (file)
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -5,7 +5,7 @@ dnl From grep.
 AC_DEFUN(jm_WITH_REGEX,
   [
     AC_ARG_WITH(included-regex,
-               [  --without-included-regex don't compile regex],
+           [  --without-included-regex don't compile regex (use with caution)],
                jm_with_regex=$withval,
                jm_with_regex=yes)
     if test "$jm_with_regex" = yes; then