Bug#990912: perl-tk: reproducible-builds: incorrect path for X11 libraries when built on usrmerge system

[Vagrant Cascadian]

Source: perl-tk
Severity: normal
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: usrmerge
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org

The path for X11 libraries is probed at build time, resulting in
different hard-coded values in the package:

  https://tests.reproducible-builds.org/debian/rb-pkg/bullseye/amd64/diffoscope-results/perl-tk.html

  ./usr/lib/x86_64-linux-gnu/perl5/5.32/Tk/Config.pm

  $xlib·=·'-L/usr/lib/x86_64-linux-gnu·-lXft';
  vs.
  $xlib·=·'-L/lib/x86_64-linux-gnu·-lXft';


The attached patch passes X11LIB to Makefile.PL to always use the X11LIB
paths in /usr/lib, which are present on both usrmerge and non-usrmerge
systems.

Applying this patch should make perl-tk reproducible on
tests.reproducible-builds.org again.


Alternately, it might be better long-term to explore runtime detection,
though I'm not sure what other implications that might have.


Thanks for maintaining perl-tk!


live well,
  vagrant
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