Module::Build::Compat(3) User Contributed Perl Documentation Module::Build::Compat(3)
Module::Build::Compat - Compatibility with ExtUtils::MakeMaker
# In a Build.PL :
my $build = Module::Build->new
( module_name => 'Foo::Bar',
license => 'perl',
create_makefile_pl => 'traditional' );
Because "ExtUtils::MakeMaker" has been the standard way to distribute modules for a long
time, many tools (CPAN.pm, or your system administrator) may expect to find a working
Makefile.PL in every distribution they download from CPAN. If you want to throw them a
bone, you can use "Module::Build::Compat" to automatically generate a Makefile.PL for you,
in one of several different styles.
"Module::Build::Compat" also provides some code that helps out the Makefile.PL at runtime.
Creates a Makefile.PL in the current directory in one of several styles, based on the
supplied "Module::Build" object $build. This is typically controlled by passing the
desired style as the "create_makefile_pl" parameter to "Module::Build"'s "new()"
method; the Makefile.PL will then be automatically created during the "distdir"
The currently supported styles are:
A Makefile.PL will be created in the "traditional" style, i.e. it will use
"ExtUtils::MakeMaker" and won't rely on "Module::Build" at all. In order to
create the Makefile.PL, we'll include the "requires" and "build_requires"
dependencies as the "PREREQ_PM" parameter.
You don't want to use this style if during the "perl Build.PL" stage you ask the
user questions, or do some auto-sensing about the user's environment, or if you
subclass "Module::Build" to do some customization, because the vanilla Makefile.PL
won't do any of that.
A small Makefile.PL will be created that passes all functionality through to the
Build.PL script in the same directory. The user must already have "Module::Build"
installed in order to use this, or else they'll get a module-not-found error.
This is just like the "small" option above, but if "Module::Build" is not already
installed on the user's system, the script will offer to use "CPAN.pm" to download
it and install it before continuing with the build.
This option has been deprecated and may be removed in a future version of
Module::Build. Modern CPAN.pm and CPANPLUS will recognize the
"configure_requires" metadata property and install Module::Build before running
Build.PL if Module::Build is listed and Module::Build now adds itself to
configure_requires by default.
Perl 5.10.1 includes "configure_requires" support. In the future, when
"configure_requires" support is deemed sufficiently widespread, the "passthrough"
style will be removed.
run_build_pl(args => \@ARGV)
This method runs the Build.PL script, passing it any arguments the user may have
supplied to the "perl Makefile.PL" command. Because "ExtUtils::MakeMaker" and
"Module::Build" accept different arguments, this method also performs some translation
between the two.
"run_build_pl()" accepts the following named parameters:
The "args" parameter specifies the parameters that would usually appear on the
command line of the "perl Makefile.PL" command - typically you'll just pass a
reference to @ARGV.
This is the filename of the script to run - it defaults to "Build.PL".
This method writes a 'dummy' Makefile that will pass all commands through to the
corresponding "Module::Build" actions.
"write_makefile()" accepts the following named parameters:
The name of the file to write - defaults to the string "Makefile".
So, some common scenarios are:
1. Just include a Build.PL script (without a Makefile.PL script), and give installation
directions in a README or INSTALL document explaining how to install the module. In
particular, explain that the user must install "Module::Build" before installing your
Note that if you do this, you may make things easier for yourself, but harder for
people with older versions of CPAN or CPANPLUS on their system, because those tools
generally only understand the Makefile.PL/"ExtUtils::MakeMaker" way of doing things.
2. Include a Build.PL script and a "traditional" Makefile.PL, created either manually or
with "create_makefile_pl()". Users won't ever have to install "Module::Build" if they
use the Makefile.PL, but they won't get to take advantage of "Module::Build"'s extra
For good measure, of course, test both the Makefile.PL and the Build.PL before
3. Include a Build.PL script and a "pass-through" Makefile.PL built using
"Module::Build::Compat". This will mean that people can continue to use the "old"
installation commands, and they may never notice that it's actually doing something
else behind the scenes. It will also mean that your installation process is
compatible with older versions of tools like CPAN and CPANPLUS.
Ken Williams <email@example.com>
Copyright (c) 2001-2006 Ken Williams. All rights reserved.
This library is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.
perl v5.16.3 2014-06-10 Module::Build::Compat(3)