Fix build instructions to include creating the m4 directory

diff --git a/README b/README
index 9476f65..082d718 100644 (file)
--- a/README
+++ b/README
@@ -42,6 +42,7 @@ Build Instructions
 
 In order to build the Node Startup Controller, run the following:
 
+  (test -d m4 || mkdir m4) &&
   gtkdocize &&
   autoreconf -ivf &&
   ./configure [options] &&