Bug#1006858: libao: reproducible-builds: build path embedded in various libraries

[Vagrant Cascadian]

Source: libao
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 and resulting Build ID for various libraries is embedded:

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

  /usr/lib/x86_64-linux-gnu/ao/plugins-4/libalsa.so

  /build/1st/libao-1.2.2+20180113/src/plugins/alsa/ao_alsa.c:301
  vs.
  /build/2/libao-1.2.2+20180113/2nd/src/plugins/alsa/ao_alsa.c:30


The attached patch to debian/rules fixes this by passing
-ffile-prefix-map via CFLAGS in the dh_auto_configure override.


Alternately, updating to use the CFLAGS passed via dh/debhelper would
also likely fix this.


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


live well,
  vagrant
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