Bug#1040975: perl: pod2man uses CW, groff-base no longer supports this by default

[Andrew Ruthven]

Package: perl
Version: 5.36.0-7
Severity: normal

Dear Maintainer,

groff-base v1.23 has been uploaded to unstable, which disables the CW macro
by default. This causes errors like this to be generated with pod2man now:

puck at dirk:~$ pod2man /usr/share/perl/5.36.0/version.pod | nroff -man | grep CW          
troff:<standard input>:145: warning: cannot select font 'CW'
troff:<standard input>:182: warning: cannot select font 'CW'
troff:<standard input>:191: warning: cannot select font 'CW'
troff:<standard input>:205: warning: cannot select font 'CW'
troff:<standard input>:207: warning: cannot select font 'CW'
...

This is causing lintian to be upset when build packages, e.g.:

W: rt-extension-mergeusers-common: groff-message troff:<standard input>:115: warning: cannot select font 'CW' [usr/share/man/man3/RT::Extension::MergeUsers.3pm.gz:1]

This version of groff-base introduces a new option in /etc/groff/man.local:

.\" "CW" is not a portable font name, but some man pages use it anyway.
.\" Uncomment this to suppress warnings produced by such pages.  This
.\" test remaps the font to roman ("R") on nroff (terminal) devices. You
.\" might prefer to remap it to bold ("B") instead.
.\" .if n .ftr CW R

Now, is it pod2man or groff-base that is at fault here? Perl 5.38 still uses
CW in pod2man by default.

Cheers,
Andrew

-- System Information:
Debian Release: trixie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.0.0-6-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_NZ.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages perl depends on:
ii  dpkg               1.21.22
ii  libperl5.36        5.36.0-7
ii  perl-base          5.36.0-7
ii  perl-modules-5.36  5.36.0-7

Versions of packages perl recommends:
ii  netbase  6.4

Versions of packages perl suggests:
pn  libtap-harness-archive-perl  <none>
ii  libterm-readline-gnu-perl    1.45-1
ii  libterm-readline-perl-perl   1.0303-2.1
ii  make                         4.3-4.1
ii  perl-doc                     5.36.0-7

-- no debconf information