Bug#1005792: btop: reproducible-builds: Build path embedded in /usr/bin/btop

[Vagrant Cascadian]

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

Different build paths trigger reproducibility issues with binaries such
as /usr/bin/btop and relevent debugging symbols.

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

  /build/1st/btop-1.1.3/include/robin_hood.h:2296
  vs.
  /build/2/btop-1.1.3/2nd/include/robin_hood.h:2296

The attached patch fixes this by passing -ffile-prefix-map via the
ADDFLAGS variable (documented in btop/README.md) to avoid embedding the
build path into the binaries.

Another option might be to pass CXXFLAGS via ADDFLAGS with the default
values that debhelper/dpkg-buildflags get.


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


Thanks for maintaining btop!


live well,
  vagrant
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