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Re: Reproducible Builds for Fedora


From: Kurt Seifried <kseifried () redhat com>
Date: Thu, 26 Sep 2013 23:59:50 -0600

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On 09/26/2013 07:51 PM, Paul Pluzhnikov wrote:
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.

Sorry I'm having trouble finding the patches, can you provide a URL?
Thanks.



- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993
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