Bug#1021792: vart: reproducible builds: Embeds build time in in various binaries

[Vagrant Cascadian]

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

The build time is embedded in various binaries:

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

  /usr/lib/x86_64-linux-gnu/libvart-buffer-object.so.2.5.0

  Xilinx·vart-buffer-object·Version:·2.5.0-··2023-11-14-01:55:35·
  vs.
  Xilinx·vart-buffer-object·Version:·2.5.0-··2022-10-12-21:36:55·

The attached patch to the two upstream cmake files fixes this by using
the TIMESTAMP function of cmake rather than calling date directly.

According to my local tests, with this patch applied, vart should build
reproducibly on tests.reproducible-builds.org once it migrates to
bookworm/testing! Differing build paths trigger additional issues, which
are only tested in unstable and experimental.

Thanks for maintaining vart!

live well,
  vagrant
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