I'm trying to track down some errors I am seeing when running several on the tests in cpan/ExtUtils-MakeMaker/t. This is using Perl 5.22.1, cross-compiled from x86_64 to x86_64, running in a qemu target. As an example, the t/basic.t test contains:

use ExtUtils::MakeMaker;
 :
 :
use Config;
use Test::More;
use ExtUtils:MM;

plan !MM->can_run(make()) && $ENV{PERL_CORE} && $Config{'usecrosscompi
+le'}
    ? (skip_all => "cross-compiling and make not available")
    : (tests => 171);
use File::Find;
 :
 :

[download]

I am finding that the call MM->can_run(make()) returns undef. make() is defined in ExtUtils::MM_Any.pm, but it appears to never be called. In addition, make() relies on the value of $self->MAKE, which is set in init_MAKE(), also defined in ExtUtils::MM_Any.pm and never called.

Now, I can get this code to work by changing it to look like this:

my $mm = ExtUtils::MM->new();
plan !$mm->can_run($mm->make()) && ...

[download]

(init_MAKE() gets called from new(), to set the internal value for MAKE which is used when make() is called.)

So, my questions are:

  1. How is this intended to work and why did it presumably work when originally written and committed? IOW, my perl knowledge is obviously lacking here.
  2. I notice some other tests use MM->can_run($Config{make}). That would work here, too, but $Config{make} could be different than the value returned by make(); does that really matter here?
  3. A bonus question: there is a copy of ExtUtils::MakeMaker.pm and ExtUtils::MM.pm in cpan/ExtUtils-MakeMaker/lib, as well as the system library. Do these tests expect to be using the local copy lib or the system copy? (Currently they are picking up the ones in the system library.)

In reply to errors with cpan/ExtUtils-MakeMaker/t/basic.t by billr1

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