Bug#1021461: icon: reproducible-builds: buildid differences in /usr/bin/icon*

[Vagrant Cascadian]

Source: icon
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 buildid varies when built from a different path for /usr/bin/icont
and /usr/bin/iconx:

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

The attached patch to debian/rules fixes this by adding
-ffile-prefix-map to CFLAGS, and adjusting a call to sed to handle "/"
in the expression.

According to my local tests, with this patch applied, icon should build
reproducibly on tests.reproducible-builds.org!

Thanks for maintaining icon!

live well,
  vagrant
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