Bug#1037269: freetds: reproducible-builds: time derived build number embedded in documentation

[Vagrant Cascadian]

Source: freetds
Severity: normal
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: timestamps
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org

A build number derived from the build time is embedded in various
/usr/share/doc/freetds-doc/reference/*_source.html files:

  https://tests.reproducible-builds.org/debian/rb-pkg/bookworm/amd64/diffoscope-results/freetds.html

  #define·TDS_VERSION_BUILD_NUMBER·856
  vs.
  #define·TDS_VERSION_BUILD_NUMBER·1256

The attached patch to configure.ac fixes this by instead using the value of
SOURCE_DATE_EPOCH for the BUILD_NUMBER if it is set, and falling back to
the default behavior if it is not set.

Alternately, I tried instead passing --date=@$SOURCE_DATE_EPOCH to the
various date calls, but for some reason that was not sufficient.


According to my local tests, with this patch applied freetds should build
reproducibly on tests.reproducible-builds.org!

Thanks for maintaining freetds!


live well,
  vagrant
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