diff -r 849826a900d2 README
--- a/README	Tue Oct 25 21:49:19 2016 -0500
+++ b/README	Thu Oct 27 12:14:13 2016 +0200
@@ -85,6 +85,28 @@
 performance gains.
 
 
+Cross Compiling on unix
+-----------------------
+
+The cross-compilation of Python requires a natively installed python to run
+Python scripts at multiple stages in the build process. The directory path to
+this native python must be set in the $PATH environment variable and it must
+have the same package version as the Python source being cross-built (for
+example python3.6).
+
+One way to ensure that the previous rule is followed, is to build the native
+python from the same source first.  For example when using the bash shell:
+
+    mkdir python-native build install
+    cd python-native
+    $(cd /path/to/source && pwd)/configure && make
+    export PATH=$(pwd):$PATH
+    cd ../build
+    $(cd /path/to/source && pwd)/configure --prefix=$(cd ../install && pwd) \
+        --host=<triplet> --build=<triplet> ... \
+        && make install
+
+
 What's New
 ----------