Note in README that cmake must be installed

diff --git a/README b/README
index 1a75c4dea3ef624a0b255252458389f1f14ffff2..2dd09fb5101d3f5d452342413d6578e8ce9dfc8b 100644 (file)
--- a/README
+++ b/README
@@ -45,6 +45,8 @@ How do I build it?
 
 You're in for a treat.
 
+* Install the cmake build tool (http://www.cmake.org/).  Major distributions have packages for this.
+
 * You first have to build the toolchain.
 
   * Linux: