Bug#755108: cyrus-imapd-2.4: hardcodes /usr/lib/perl5

[Niko Tyni]

Source: cyrus-imapd-2.4
Version: 2.4.17+caldav~beta9-10
Severity: important
User: debian-perl at lists.debian.org
Usertags: perl-5.20-transition

Starting with version 5.20.0 (currently in experimental), the Debian
perl package is changing the "vendorarch" library paths (currently
/usr/lib/perl5) to include the multiarch triplet and the perl version. See
#748380 for details.

For this to work, packages containing binary perl modules need to migrate
from using the hardcoded /usr/lib/perl5 directory to the value of the
$Config{vendorarch} variable, as defined in the 'Config' module.

This package fails to build with perl_5.20.0-1:

  dh_install --fail-missing
  dh_install: libcyrus-imap-perl24 missing files (usr/lib/perl*), aborting
  make[1]: *** [override_dh_install] Error 255
  debian/rules:245: recipe for target 'override_dh_install' failed
  make[1]: Leaving directory '/«BUILDDIR»/cyrus-imapd-2.4-2.4.17+caldav~beta9'
  make: *** [binary-arch] Error 2

One solution for this might be an executable debhelper install file
(available with debhelper compat level 9) expanding $Config{vendorarch}.
See #751924 for an example of this.

Please note that satisfying the build dependencies with Perl 5.20 currently
requires a locally patched net-snmp package for #751918. I hope to get
that fixed in sid soon.

Please ask on the debian-perl list if you want help with this, and see
 https://bugs.debian.org/cgi-bin/pkgreport.cgi?tag=perl-5.20-transition;users=debian-perl@lists.debian.org
for a list of similar bugs and patches.
-- 
Niko Tyni   ntyni at debian.org