[lamby@debian.org: Bug#808917: m4: FTBFS: FAIL: test-update-copyright.sh]

[Santiago Vila]

Greetings.

I've received this report from the Debian bug system.

Fortunately, it has been easy to diagnose and fix: New perl (5.22)
makes test-update-copyright.sh to give a deprecation warning because
there are unescaped braces in build-aux/update-copyright.
The warning message makes the test to fail, which in turn
makes the Debian package build to fail.

The attached patch seems to fix this.

Thanks.

----- Forwarded message from Chris Lamb <la...@debian.org> -----

Date: Thu, 24 Dec 2015 11:56:05 +0000
From: Chris Lamb <la...@debian.org>
To: sub...@bugs.debian.org
Subject: Bug#808917: m4: FTBFS: FAIL: test-update-copyright.sh

Source: m4
Version: 1.4.17-4
Severity: serious
Justification: fails to build from source
User: reproducible-bui...@lists.alioth.debian.org
Usertags: ftbfs
X-Debbugs-Cc: reproducible-bui...@lists.alioth.debian.org

Dear Maintainer,

m4 fails to build from source in unstable/amd64:

  [..]

  PASS: test-unistd
  PASS: test-unsetenv
  FAIL: test-update-copyright.sh

[...]

Description: build-aux/update-copyright: Add escapes for braces in perl regex
Author: Santiago Vila <sanv...@debian.org>
Bug-Debian: https://bugs.debian.org/808917

--- a/build-aux/update-copyright
+++ b/build-aux/update-copyright
@@ -124,7 +124,7 @@
 use warnings;
 
 my $copyright_re = 'Copyright';
-my $circle_c_re = '(?:\([cC]\)|@copyright{}|&copy;)';
+my $circle_c_re = '(?:\([cC]\)|@copyright\{\}|&copy;)';
 my $holder = $ENV{UPDATE_COPYRIGHT_HOLDER};
 $holder ||= 'Free Software Foundation, Inc.';
 my $prefix_max = 5;