Add "-f Makefile" to initial "make" (no args). Set PERL env var in "make test" and "make"

[rocky]

I tried also adding the same "-f Makefile" to "make install" but a test fails:

$ blib/script/cpan -j t/97-lib_cpan1/CPAN/Config.pm Local::Make::Fails
Loading internal null logger. Install Log::Log4perl for logging messages
CPAN: Storable loaded ok (v2.53)
Reading '/src/external-vcs/github/rocky/cpanpm/cpan-home/Metadata'
Warning: Found only 11 objects in /src/external-vcs/github/rocky/cpanpm/cpan-home/Metadata
CPAN: LWP::UserAgent loaded ok (v6.13)
CPAN: Time::HiRes loaded ok (v1.9726)
CPAN: URI::URL loaded ok (v5.04)
Reading '/src/external-vcs/github/rocky/cpanpm/t/97-cpan1-test-mirror/authors/01mailrc.txt.gz'
CPAN: File::Which loaded ok (v1.19)
CPAN: Compress::Zlib loaded ok (v2.068)
............................................................................DONE
Reading '/src/external-vcs/github/rocky/cpanpm/t/97-cpan1-test-mirror/modules/02packages.details.txt'
  Database was generated on Tue, 27 Jan 2009 19:26:52 GMT
Warning: This index file is 2714 days old.
  Please check the host you chose as your CPAN mirror for staleness.
  I'll continue but problems seem likely to happen.�
............................................................................DONE
Reading '/src/external-vcs/github/rocky/cpanpm/t/97-cpan1-test-mirror/modules/03modlist.data.gz'
DONE
Writing /src/external-vcs/github/rocky/cpanpm/cpan-home/Metadata
Running install for module 'Local::Make::Fails'
CPAN: Digest::SHA loaded ok (v5.95)
Checksum for /src/external-vcs/github/rocky/cpanpm/t/97-cpan1-test-mirror/authors/id/B/BU/BUSTER/Local-Make-Fails.tgz ok
CPAN: Archive::Tar loaded ok (v2.04)
Local-Make-Fails/
Local-Make-Fails/.gitignore
Local-Make-Fails/.releaserc
Local-Make-Fails/Makefile.PL
Local-Make-Fails/MANIFEST
'YAML' not installed, will not store persistent state
CPAN: CPAN::Meta::Requirements loaded ok (v2.132)
CPAN: CPAN::Meta loaded ok (v2.150001)
Configuring B/BU/BUSTER/Local-Make-Fails.tgz with Makefile.PL
I didn't work. Too bad for you! at Makefile.PL line 5.
Warning: No success on command[/home/rocky/perl5/perlbrew/perls/perl-5.22.0/bin/perl Makefile.PL INSTALL_BASE=/src/external-vcs/github/rocky/cpanpm/cpan-home]
  BUSTER/Local-Make-Fails.tgz
  /home/rocky/perl5/perlbrew/perls/perl-5.22.0/bin/perl Makefile.PL INSTALL_BASE=/src/external-vcs/github/rocky/cpanpm/cpan-home -- NOT OK

See also discussion in cpantesters.

[andk]

The request is missing a motivation section that explains what this pull request is trying to achieve which cannot be achieved otherwise. And it seems to violate the DRY principle, so it would help a lot if it could explain why such a violation would seem justified.