1Alien::m4(3)          User Contributed Perl Documentation         Alien::m4(3)
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NAME

6       Alien::m4 - Find or build GNU m4
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VERSION

9       version 0.21
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SYNOPSIS

12       From a Perl script
13
14        use Alien::m4;
15        use Env qw( @PATH );
16        unshift @PATH, Alien::m4->bin_dir;  # m4 is now in your path
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18       From Alien::Base Build.PL
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20        use Alien:Base::ModuleBuild;
21        my $builder = Module::Build->new(
22          ...
23          alien_bin_requires => {
24            'Alien::m4' => '0.07',
25          },
26          ...
27        );
28        $builder->create_build_script;
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DESCRIPTION

31       This package can be used by other CPAN modules that require GNU m4.
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METHODS

34   exe
35        my $m4 = Alien::m4->exe;
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37       Returns the "name" of m4.  Normally this is "m4", but on some platforms
38       it may be gm4 or gnum4, or whatever is specified by $ENV{M4}.
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HELPERS

41   m4
42        %{m4}
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44       Returns the name of the m4 command.  Usually just "m4".
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CAVEATS

47       Why GNU m4?  Many Unixen come with BSD or other variants of m4 which
48       are perfectly good.  Unfortunately, the main use case for this module
49       is Alien::Autotools and friends.  Autoconf requires the GNU m4,
50       probably for political reasons, possibly for technical reasons.  If you
51       are using one of these Unixen, don't despair, you can usually install
52       the GNU version of m4 either by building from source or by installing a
53       binary package, with either the name "gm4" or "gnum4", and this module
54       will find it, and Alien::Autotools will be able to use it.
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AUTHOR

57       Graham Ollis <plicease@cpan.org>
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60       This software is copyright (c) 2017 by Graham Ollis.
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62       This is free software; you can redistribute it and/or modify it under
63       the same terms as the Perl 5 programming language system itself.
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67perl v5.38.0                      2023-07-20                      Alien::m4(3)
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