[Reproducible-builds] Bug#762388: ifupdown: please make method order deterministic when generating C code

[Jérémy Bobbio]

Source: ifupdown
Version: 0.7.48.2
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: randomness

Hi!

As part of the “reproducible builds” effort, we have detected that
`ifupdown` did not build reproducibly.

This is caused by the fact that Perl orders its hashes randomly by
default. This, in turn, results in a random order in which the methods
are written when generating C code. Resulting in different binaries for
each builds.

The attached patch will sort the methods to produce a stable order.
`ifupdown` can then build reproducibly. :)

 [1]: https://wiki.debian.org/ReproducibleBuilds

-- 
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