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  }
}

sub init
{
  my($self, $meta) = @_;

  my $plugin = $self->pick;
  Alien::Build->log("Using PkgConfig plugin: $plugin");

  if(ref($self->pkg_name) eq 'ARRAY')
  {
    $meta->add_requires('configure', 'Alien::Build::Plugin::PkgConfig::Negotiate' => '0.79');
  }

  if($self->atleast_version || $self->exact_version || $self->max_version)
  {
    $meta->add_requires('configure', 'Alien::Build::Plugin::PkgConfig::Negotiate' => '1.53');
  }

  my @args;
  push @args, pkg_name         => $self->pkg_name;
  push @args, register_prereqs => 0;

  foreach my $method (map { "${_}_version" } qw( minimum atleast exact max ))
  {
    push @args, $method => $self->$method if defined $self->$method;
  }

  $meta->apply_plugin($plugin, @args);

  $self;
}

1;

__END__

=pod

=encoding UTF-8

=head1 NAME

Alien::Build::Plugin::PkgConfig::Negotiate - Package configuration negotiation plugin

=head1 VERSION

version 2.84

=head1 SYNOPSIS

 use alienfile;
 plugin 'PkgConfig' => (
   pkg_name => 'libfoo',
 );

=head1 DESCRIPTION

This plugin provides Probe and Gather steps for pkg-config based packages.  It picks
the best C<PkgConfig> plugin depending your platform and environment.

=head1 PROPERTIES

=head2 pkg_name

The package name.  If this is a list reference then .pc files with all those package
names must be present.  The first name will be the primary and used by default once
installed.  For the subsequent C<.pc> files you can use the
L<Alien::Base alt method|Alien::Base/alt> to retrieve the alternate configurations
once the L<Alien> is installed.

=head2 atleast_version

The minimum required version that is acceptable version as provided by the system.

=head2 exact_version

The exact required version that is acceptable version as provided by the system.

=head2 max_version

The max required version that is acceptable version as provided by the system.

=head2 minimum_version

Alias for C<atleast_version> for backward compatibility.

=head1 METHODS

=head2 pick

 my $name = Alien::Build::Plugin::PkgConfig::Negotiate->pick;

Returns the name of the negotiated plugin.

=head1 ENVIRONMENT

=over 4

=item ALIEN_BUILD_PKG_CONFIG

If set, this plugin will be used instead of the build in logic
which attempts to automatically pick the best plugin.

=back

=head1 SEE ALSO

L<Alien::Build>, L<alienfile>, L<Alien::Build::MM>, L<Alien>

=head1 AUTHOR

Author: Graham Ollis E<lt>plicease@cpan.orgE<gt>

Contributors:

Diab Jerius (DJERIUS)

Roy Storey (KIWIROY)

Ilya Pavlov

David Mertens (run4flat)

Mark Nunberg (mordy, mnunberg)

Christian Walde (Mithaldu)

Brian Wightman (MidLifeXis)

Zaki Mughal (zmughal)

mohawk (mohawk2, ETJ)

Vikas N Kumar (vikasnkumar)

Flavio Poletti (polettix)

Salvador Fandiño (salva)

Gianni Ceccarelli (dakkar)

Pavel Shaydo (zwon, trinitum)

Kang-min Liu (劉康民, gugod)

Nicholas Shipp (nshp)

Juan Julián Merelo Guervós (JJ)

Joel Berger (JBERGER)

Petr Písař (ppisar)

Lance Wicks (LANCEW)

Ahmad Fatoum (a3f, ATHREEF)

José Joaquín Atria (JJATRIA)

Duke Leto (LETO)

Shoichi Kaji (SKAJI)