Alien::SDL2 - building, finding and using SDL2 binaries


Version 0.002


Alien::SDL2 tries (in given order) during its installation:

  • When given --with-sdl2-config option use specified sdl2-config script to locate SDL2 libs.

     perl Build.PL --with-sdl2-config=/opt/sdl2/bin/sdl2-config

    or using default script name 'sdl2-config' by running:

     perl Build.PL --with-sdl2-config

    IMPORTANT NOTE: Using --with-sdl2-config avoids considering any other build methods; no prompt with other available build options.

  • Locate an already installed SDL2 via 'sdl2-config' script.

  • Download prebuilt SDL2 binaries (if available for your platform).

  • Build SDL2 binaries from source codes (if possible on your system).

Later you can use Alien::SDL2 in your module that needs to link agains SDL2 and/or related libraries like this:

    # Sample
    use ExtUtils::MakeMaker;
    use Alien::SDL2;

      NAME         => 'Any::SDL2::Module',
      VERSION_FROM => 'lib/Any/SDL2/',
      LIBS         => Alien::SDL2->config('libs', [-lAdd_Lib]),
      INC          => Alien::SDL2->config('cflags'),
      # + additional params


Please see Alien for the manifesto of the Alien namespace.

In short Alien::SDL2 can be used to detect and get configuration settings from an installed SDL2 and related libraries. Based on your platform it offers the possibility to download and install prebuilt binaries or to build SDL2 & co. from source codes.

The important facts:

  • The module does not modify in any way the already existing SDL2 installation on your system.

  • If you reinstall SDL2 libs on your system you do not need to reinstall Alien::SDL2 (providing that you use the same directory for the new installation).

  • The prebuild binaries and/or binaries built from sources are always installed into perl module's 'share' directory.

  • If you use prebuild binaries and/or binaries built from sources it happens that some of the dynamic libraries (*.so, *.dll) will not automaticly loadable as they will be stored somewhere under perl module's 'share' directory. To handle this scenario Alien::SDL2 offers some special functionality (see below).



This function is the main public interface to this module. Basic functionality works in a very similar maner to 'sdl2-config' script:

    Alien::SDL2->config('prefix');   # gives the same string as 'sdl2-config --prefix'
    Alien::SDL2->config('version');  # gives the same string as 'sdl2-config --version'
    Alien::SDL2->config('libs');     # gives the same string as 'sdl2-config --libs'
    Alien::SDL2->config('cflags');   # gives the same string as 'sdl2-config --cflags'

On top of that this function supports special parameters:


Returns a list of full paths to shared libraries (*.so, *.dll) that will be required for running the resulting binaries you have linked with SDL2 libs.


Returns a list of full paths to directories with shared libraries (*.so, *.dll) that will be required for running the resulting binaries you have linked with SDL2 libs.


Returns a reference to hash of value pairs '<libnick>' => '<full_path_to_shlib'>, where '<libnick>' is shortname for SDL2 related library like: SDL2, SDL2_gfx, SDL2_net, SDL2_sound ... + some non-SDL2 shortnames e.g. smpeg, jpeg, png.

NOTE: config('ld_<something>') return an empty list/hash if you have decided to use SDL2 libraries already installed on your system. This concerns 'sdl2-config' detection.


This function checks the availability of given header(s) when using compiler options provided by "Alien::SDL2->config('cflags')".

    Alien::SDL2->check_header('SDL2.h', 'SDL2_net.h');

Returns 1 if all given headers are available, 0 otherwise.


Tries to find a header file specified as a param in SDL2 prefix direcotry and based on "#define" macros inside this header file tries to get a version triplet.


Returns string like '1.2.3' or undef if not able to find and parse version info.


Checks the presence of given SDL2 related libraries.

 Alien::SDL2->havelib('SDL2', 'SDL2_image', 'SDL2_mixer');

Parameter(s): One or more SDL2 related lib names - e.g. SDL2, SDL2_mixer, SDL2_image, ...

Returns: 1 if all libs specified as a param are available; 0 otherwise.


    Kartik Thakore


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

The full text of the license can be found in the LICENSE file included with this module.