Re: Reproducible Builds for Fedora

[Paul Pluzhnikov <ppluzhnikov () google com>]

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.