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Compiling Freedoom

This document is a general overview of Freedoom’s dependencies required to build it. See README for a description of what Freedoom is, and BUILD-SYSTEM for the technical details on how Freedoom is built.

Required software

Building the Freedoom IWADs pretty much simply requires the following:

  • make: While there is some attempt to keep our Makefiles portable, testing does not really happen on anything but GNU Make (patches to fix portability are most welcome!). On non-GNU systems, it might be available in a package and binary named as gmake.

  • Python: Freedoom uses several Python programs in its tree to assist with building the IWADs. Both Python 2.7 and 3.x are fully supported.

  • Pillow: A Python image manipulation module that provides the features we need for scaling and composing various graphics of the game.

  • DeuTex 5.0: Freedoom depends on features developed in this version of DeuTex and will not build on earlier versions. It is available at https://github.com/Doom-Utils/deutex in source and Windows binary formats.

All or most of this software should already be available in your operating system’s software repository, with the likely exception of DeuTex, which is easy to build.

Building Freedoom

Significant work has been put into making this step easy. At the top of the Freedoom source tree, you should be able to simply type make and wait for it to eventually produce the IWAD files in the wads sub-directory. Parallel make builds are safe too, such as with make -j.

If only interested in a specific IWAD, you can also run make wads/freedm.wad, make wads/freedoom1.wad, make wads/freedoom2.wad.

As mentioned in the prior section, the Makefile only recieves testing with the GNU version of Make. If the primary version of your Make is not GNU and it fails, try gmake instead.

Building on Microsoft Windows

Freedoom has normally seen all of its development on Unix systems, nevertheless some people like to compile Freedoom on Windows. This is possible, although complicated by our choice of tooling for the project.

GNU environments for Windows such as Cygwin, MSYS2, or WSL provide sufficient shell capabilities to build Freedoom. The dependencies listed previously for Freedoom apply just as well to a Windows environment.

Instructions on how to use a GNU system and shell are out of scope of this document.

Optional software

  • Git: Freedoom is developed using the Git version control system, the latest developments can be tracked with it.

  • AsciiDoc: The *.adoc files are all written in AsciiDoc markup, and it can be used to generate HTML versions of all these documents. This is used as part of the make dist target, to generate the README.html file for inclusion with official Zip files.

  • Zip: The make dist target uses Zip to create release archives for FreeDM, Phase 1, and Phase 2. This can also provide an easy way to automate generating in-development versions for other people.