[Reproducible-builds] Bug#792491: dpkg-dev: please make the output of dpkg-shlibdeps reproducible

[Chris Lamb]

Source: dpkg-dev
Version: 1.18.1
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: toolchain
X-Debbugs-Cc: reproducible-builds at lists.alioth.debian.org

Hi,

While working on the "reproducible builds" effort [1], we have noticed
that dpkg-dev doesn't sort some dependencies deterministically.

This results in the output ofdpkg-shlibdeps non-reproducible, flapping
between, for example:

  - pkga | pkgb, pkga | pkgc
  + pkga | pkgc, pkga | pkgb

This can (currently) be seen in pyopencl:

  https://reproducible.debian.net/rb-pkg/unstable/amd64/pyopencl.html

This is caused by deps_compare only comparing the "left"-most dependency
of a Dpkg::Deps::Multiple. The attached patch ensures that all
dependencies
of such an object are checked, including an addition to the testsuite.

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


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby at debian.org / chris-lamb.co.uk
       `-
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