Add DATAOPTS

[Shushe] / README.markdown

diff --git a/README.markdown b/README.markdown
index d4399e35a858c3b514e335e22a209150c60904b8..70a9730182b25a89b8542b8a8bed91a3aa875931 100644 (file)
--- a/README.markdown
+++ b/README.markdown
@@ -307,6 +307,12 @@ The following additional variables can be used to control the behaviour
     default, to enable additional rules without overriding the existing
     ones.
 
+- **`DATAOPTS`:**
+  Additional options to use when calling Make during the first stage of a two‐stage build using `DATADIR`.
+
+  This can be used to override variables which are only applicable during the second stage.
+  Note that when supplying this variable on the shell, it will need to be double‐quoted.
+
 - **`DATAEXT`:**
   A list of file extensions which signify “data” files during a two‐stage build using `DATADIR`.