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Message-ID: <5244E4BC.9040007@google.com>
Date: Thu, 26 Sep 2013 18:51:56 -0700
From: Paul Pluzhnikov <ppluzhnikov@...gle.com>
To: oss-security@...ts.openwall.com
CC: Alexander Cherepanov <cherepan@...me.ru>
Subject: Re: Reproducible Builds for Fedora
On 9/26/13 6:36 PM, Alexander Cherepanov wrote:
> The choice is simple -- produce byte-for-byte identical builds. Both Tor
> and Debian aim at it.
FWIW, when we build compilers (and then all other binaries) at Google,
we don't just aim for, but actually achieve bit-identical rebuilds.
New GCC releases often break this, but a few patches later the
capability is restored. Latest example:
http://comments.gmane.org/gmane.comp.gcc.devel/127875
The ability to do bit-identical rebuild is critical to our build system
(http://google-engtools.blogspot.com/2011/09/build-in-cloud-distributing-build-steps.html)
and in particular the high cache hit rates it achieves.
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