Bug#1003915: mathgl: reproducible-builds: BuildId differences triggered by RPATH

[Vagrant Cascadian]

Source: mathgl
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 RPATH contains the build path resulting in different buildid:

  https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/mathgl.html

The attached patch to debian/rules passes
-DCMAKE_BUILD_RPATH_USE_ORIGIN=ON via a dh_auto_configure override,
which should use a relative path for RPATH.

Alternately, updating the packaging to debhelper compat level 14 should
fix this, although it is currently an experimental compat level.

With this patch applied, mathgl should build reproducibly on
tests.reproducible-builds.org!

Thanks for maintaining mathgl!

live well,
  vagrant
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