From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yann E. MORIN <yann.morin.1998@free.fr>
Date: Sun, 4 Feb 2018 10:54:13 +0100
Subject: [Buildroot] [PATCH v1 2/2] dhcp: disable isc assertions
 (reproducible builds)
In-Reply-To: <877ert20yj.fsf@dell.be.48ers.dk>
References: <20171027192424.19760-1-ps.report@gmx.net>
 <20171027192424.19760-2-ps.report@gmx.net>
 <20180108211857.2166f95e@windsurf> <20180130175402.GA3468@scaer>
 <877ert20yj.fsf@dell.be.48ers.dk>
Message-ID: <20180204095413.GA2411@scaer>
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To: buildroot@busybox.net

Peter, All,

On 2018-02-03 22:54 +0100, Peter Korsgaard spake thusly:
> >>>>> "Yann" == Yann E MORIN <yann.morin.1998@free.fr> writes:
[--SNIP--]
>  > Now, about reproducibility... We could at least pass -DFILE=\"\" and so
>  > on from inside our gcc-wrapper, like we already do for __DATE__ and
>  > __TIME__. Yes, that would give an empty filename in assertions and the
>  > likes, but do we care in the end?
> 
> It would be nicer if we could pass basename($file), but that would break
> with compilations with multiple source files passed to gcc or header
> files, so yeah, perhaps that is the best way forward.
> 
> How does E.G. Debian handle it?

I could not find an authoritative source for this, but from what I could
hint from [0] (see the part about "Qt tests and __FILE__"), they do have
a patched gcc and a special dpkg which use the BUILD_PATH_PREFIX_MAP
environment variable as specified iby reproducible-builds.org [1].

Also, upstream gcc has an "in-progress" upstream solution being worked
on, based on BUILD_PATH_PREFIX_MAP, but they did not like it [2]...

[0] https://reproducible.alioth.debian.org/blog/posts/134/
[1] https://reproducible-builds.org/specs/build-path-prefix-map/
[2] https://gcc.gnu.org/ml/gcc-patches/2017-08/msg00232.html

Regards,
Yann E. MORIN.

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