Patch #718286: Support DESTDIR.
diff --git a/README b/README
index acbb30f..943d1a9 100644
--- a/README
+++ b/README
@@ -878,6 +878,10 @@
directory given by --exec-prefix or the `exec_prefix' Make variable
(defaults to the --prefix directory) is given.
+If DESTDIR is set, it will be taken as the root directory of the
+installation, and files will be installed into $(DESTDIR)$(prefix),
+$(DESTDIR)$(exec_prefix), etc.
+
All subdirectories created will have Python's version number in their
name, e.g. the library modules are installed in
"/usr/local/lib/python<version>/" by default, where <version> is the