Bug#1021793: vart: reproducible builds: buildid differences triggered by build paths

[Vagrant Cascadian]

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

The buildid for various binaries differs when built from a different
build path:

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

The attached patch to debian/rules fixes this by passing
-DCMAKE_BUILD_RPATH_USE_ORIGIN=ON to configure.

According to my local tests, with this patch applied, and the patch
submitted in #1021792 to fix timestamp issues, vart should build
reproducibly on tests.reproducible-builds.org!

Thanks for maintaining vart!

live well,
  vagrant
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