INSTALL: mention variables for reproducible builds

Mention two variables introduced by commit ac977f5 ("use more fixed
strings to build the hypervisor").

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Jan Beulich <jbeulich@suse.com>
Cc: Keir Fraser <keir@xen.org>
Cc: Tim Deegan <tim@xen.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

diff --git a/INSTALL b/INSTALL
index 13d7a17c3351b19cb6242f359af30639ed89e122..1ed44bb8a3f4eb7113ad6f62a649bb24106696f1 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -211,6 +211,12 @@ changed with these variables.
 XEN_WHOAMI=
 XEN_DOMAIN=
 
+Some components of xen and tools will include an unpredictable timestamp
+into the binaries. To allow reproducible builds the following variables
+can be used to provide fixed timestamps in the expected format.
+XEN_BUILD_DATE=<output of date(1)>
+XEN_BUILD_TIME=hh:mm:ss
+
 The following variables can be used to tweak some aspects of the
 hypervisor build.
 verbose=y