Alien::cmake3(3) User Contributed Perl Documentation Alien::cmake3(3)

Alien::cmake3 - Find or download or build cmake 3 or better

version 0.08

From Perl:

use Alien::cmake3;
use Env qw( @PATH );

unshift @PATH, Alien::cmake3->bin_dir;
system 'cmake', ...;

From alienfile

use alienfile;

share {
  # Build::CMake plugin pulls in Alien::cmake3 automatically
  plugin 'Build::CMake';
  build [
    # this is the default build step, if you do not specify one.
    [ '%{cmake3}', -G => '%{cmake_generator}', '-DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=true', '-DCMAKE_INSTALL_PREFIX:PATH=%{.install.prefix}', '.' ],
    '%{make} install',

This Alien distribution provides an external dependency on the build tool "cmake" version 3.0.0 or better. "cmake" is a popular alternative to autoconf.

my @dirs = Alien::cmake3->bin_dir;

List of directories that need to be added to the "PATH" in order for "cmake" to work.

my $exe = Alien::cmake3->exe;

The name of the "cmake" executable.


The name of the "cmake" executable.

Alien::Build plugin for "cmake" This will automatically pull in Alien::cmake3 if you need it.
This is an older distribution that provides an alienized "cmake". It is different in these ways:
It integrates better with Aliens that are based on that technology.
Alien::CMake will provide 2.x.x on some platforms where more recent binaries are not available.
It does this by building "cmake" from source.
In the opinion of the maintainer of both Alien::cmake3 and Alien::CMake for these reasons.

This is the normal Alien::Build environment variable and you can set it to one of "share", "system" or "default".
If set to true, and if a share install is attempted, Alien::cmake3 will not try a binary share install (even if available), and instead a source share install.

If you do not have a system "cmake" of at least 3.0.0 available, then a share install will be attempted.

Binary share installs are attempted on platforms for which the latest version of "cmake" are provided. As of this writing, this includes: Windows (32/64 bit), macOS (intel/arm universal) and Linux (intel/arm 64 bit). No checks are made to ensure that your platform is supported by this binary installs. Typically the same versions supported by the operating system vendor and supported by "cmake", so that should not be a problem. If you are using an operating system not supported by its vendor Please Stop That, this is almost certainly a security vulnerability.

That said if you really do need Alien::cmake3 on an unsupported system, you have some options:

If you can find an older version better than 3.0.0 that is supported by your operating system.
Set the "ALIEN_CMAKE_FROM_SOURCE" environment variable to a true value to build a share install from source.

Source share installs are attempted on platforms for which the latest version of "cmake" are not available, like the various flavours of *BSD. This may not be ideal, and if you can install a system version of "cmake" it may work better.

Author: Graham Ollis <>


Adriano Ferreira (FERREIRA)

This software is copyright (c) 2017 by Graham Ollis.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

2023-07-25 perl v5.38.0