updated the docstring for --with-xml

diff --git a/ext/xml/config.m4 b/ext/xml/config.m4
index 787ee3465d6aa964c0034bfc493390c2ea546834..86853a326f7574133dd139e35c82ac19a0cf29c0 100644 (file)
--- a/ext/xml/config.m4
+++ b/ext/xml/config.m4
@@ -3,7 +3,10 @@
 
 AC_MSG_CHECKING(for XML support)
 AC_ARG_WITH(xml,
-[  --with-xml              Include XML support],[
+[  --with-xml[=DIR]        Include XML support.  Will look for expat
+                          in DIR if specified.  Set DIR to "shared" to
+                          build as a dl, or "shared,DIR" to build as a dl
+                          and still specify DIR.],[
   case $withval in
     shared)
       shared=yes