[Reproducible-builds] Bug#819352: xpdf: please make the build reproducible

[Sascha Steinbiss]

Package: xpdf
Version: 3.04-1
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: fileordering

Hi,

While working on the "reproducible builds" effort [1], we have noticed
that xpdf could not be built reproducibly.
The linking step in the 'override_dh_auto_build' rules target uses a
file ordering based on wildcards alone, which results in different
binaries for different file orderings.

The attached patch fixes this by making sure objects are linked in sorted
order. Once applied, xpdf can be built reproducibly in our current
experimental framework.

Best regards,
Sascha

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