Bug#1020674: ifstat: reproducible-builds: Embedded build path in /usr/bin/ifstat

[Vagrant Cascadian]

Source: ifstat
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 build path is embedded in /usr/bin/ifstat:

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

  /build/1st/ifstat-1.1/ifstat.c:458
  vs.
  /build/2/ifstat-1.1/2nd/ifstat.c:458

The attached patch fixes this in debian/rules by passing
-ffile-prefix-map in CFLAGS to configure.

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

Thanks for maintaining ifstat!

live well,
  vagrant
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