Bug#1011496: nwall: reproducible-builds: embedded build paths in /usr/bin/nwall

[Vagrant Cascadian]

Source: nwall
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/nwall:

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

  /build/1st/nwall-1.32+debian/src/nwall.c:65
  vs.
  /build/2/nwall-1.32+debian/2nd/src/nwall.c:65

The attached patch fixes this by adding -ffile-prefix-map to CFLAGS in
debian/rules, which avoids embedding the absolute build path.

Alternately, switching to use a newer debhelper compat level and the dh
build system would likely also fix this, as it includes -ffile-prefix-map
by default.


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


live well,
  vagrant
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