Bug#681026: perl-modules: Installation of modules via CPAN fails due to broken dependency logic

[Vincent Lefevre]

On 2013-04-17 09:38:32 +0300, Niko Tyni wrote:
> On Wed, Apr 17, 2013 at 01:55:48AM +0200, Vincent Lefevre wrote:
> > > Note the difference in PERL5LIB: you're missing the suggested
> > > lib/perl5/<archname> .
> > 
> > That shouldn't be necessary. The perlrun(1) man page says:
> > 
> >   PERL5LIB    A list of directories in which to look for Perl library
> >               files before looking in the standard library and the
> >               current directory.  Any architecture-specific directories
> >               under the specified locations are automatically included
> >               if they exist, with this lookup done at interpreter
> >               startup time.
> > 
> > lib/perl5/<archname> doesn't exist yet initially, but I'd say
> > that's up to cpan to add it automatically when necessary.
> 
> I wouldn't FWIW, but that's for upstream to decide. I certainly won't
> add a Debian deviation to do that.

OK. Alternatively, it could be decided to add architecture-specific
directories whether they exist or not at interpreter startup time.

> > Well, at least since CPAN 1.9800, the problem no longer occurs without
> > having to do anything you suggested. 
> 
> As I said, only because installing a newer CPAN creates the arch-specific
> subdirectory as a side effect (putting perllocal.pod and .packlist there).

OK, I forgot this side effect.

> > I wonder what has changed (e.g.
> > whether this is intentional or the problem could reappear later).
> 
> I note that newest versions of local::lib no longer suggest putting the
> arch-specific directory in PERL5LIB, precisely because Perl includes
> it automatically. I suspect this bootstrapping issue with nonexistent
> directories is not widely understood.

Do you mean that architecture-specific directories are added even if
they don't exist at interpreter startup time?

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Vincent Lefèvre <vincent at vinc17.net> - Web: <http://www.vinc17.net/>
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