Bug#1021464: stfl: reproducible-builds: build path embedded in binaries

[Vagrant Cascadian]

Source: stfl
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 various binaries:

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

  /usr/lib/x86_64-linux-gnu/perl5/5.34/auto/stfl/stfl.so

  /build/1st/stfl-0.22/public.c:401
  vs.
  /build/2/stfl-0.22/2nd/public.c:401

The attached three patches to debian/rules fix this by adjusting the
make call to use dh_auto_make and passing CFLAGS via the CC variable,
adds -ffile-prefix-map to CFLAGS, and patches the generated
perl5/Makefile to add -ffile-prefix-map to CCFLAGS.

According to my local tests, with these patches applied, stfl should
build reproducibly on tests.reproducible-builds.org!

Thanks for maintaining stfl!

live well,
  vagrant
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