README: document using autoreconf.

diff --git a/README b/README
index 9d0c79a..3d7d9dc 100644 (file)
--- a/README
+++ b/README
@@ -30,6 +30,7 @@ For dependencies, run './configure'.  In brief you will need:
 
 To build from source:
 
+  autoreconf -i   # only if building from git
   ./configure
   make
   sudo make install