Enabling the WITH_REPRODUCIBLE_BUILD knob for 12.0-REL

[Tomoaki AOKI]

I prefer releng, rather than stable, to make it default.
Binary releases requiring reproducible builds are built from
release and releng branches.


On Mon, 10 Sep 2018 10:56:14 -0400
Ed Maste <emaste at freebsd.org> wrote:

> The FreeBSD base system is a reproducible build[1] with a minor
> exception: the build metadata (timestamps, user, hostname, etc.)
> included in the kernel and loader.
> 
> With the default, non-reproducible build the kernel ident looks like:
> 
> FreeBSD 12.0-ALPHA5 #4 r338195: Mon Jan 1 10:11:12 EDT 2018
>    user at hostname:/path/to/freebsd/src
> 
> and the loader ident:
> 
> FreeBSD/amd64 EFI loader, Revision 1.1
> (Mon Jan 1 10:11:12 EDT 2018 user at hostname)
> 
> With reproducible builds enabled the kernel ident looks like:
> 
> FreeBSD 12.0-ALPHA5  r338195
> 
> and the loader ident:
> 
> FreeBSD/amd64 EFI loader, Revision 1.1
> 
> I would like to enable the REPRODUCIBLE_BUILD knob by default for the
> 12.0 release, and propose we do this by adding a step to switch the
> default to the list of changes[2] that re@ commits to the branch as
> part of the release process.
> 
> [1] https://reproducible-builds.org
> [2] https://www.freebsd.org/doc/en_US.ISO8859-1/articles/freebsd-releng/releng-head.html
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-- 
Tomoaki AOKI    <junchoon at dec.sakura.ne.jp>