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| Building XZ Utils for DOS |
| ========================= |
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| Introduction |
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| This document explains how to build XZ Utils for DOS using DJGPP. |
| The resulting binaries should run at least on various DOS versions |
| and under Windows 95/98/98SE/ME. |
| |
| This is somewhat experimental and has got very little testing. |
| |
| Note: Makefile and config.h are updated only now and then. This |
| means that if you checked out a development version, building for |
| DOS might not work without updating Makefile and config.h first. |
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| Getting and Installing DJGPP |
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| You may use <https://www.delorie.com/djgpp/zip-picker.html> to help |
| deciding what to download. If you are only interested in building |
| XZ Utils, the zip-picker may list files that you don't strictly |
| need. However, using the zip-picker can still be worth it to get a |
| nice short summary of installation instructions (they can be found |
| from readme.1st too). |
| |
| For a more manual method, first select a mirror from |
| <https://www.delorie.com/djgpp/getting.html> and go the |
| subdirectory named "current". You need the following files: |
| |
| unzip32.exe (if you don't already have a LFN-capable unzipper) |
| v2/djdev205.zip |
| v2gnu/bnu234b.zip |
| v2gnu/gcc920b.zip |
| v2gnu/mak43b.zip |
| v2misc/csdpmi7b.zip |
| |
| If newer versions are available, probably you should try them first. |
| Note that versions older than djdev205.zip aren't supported. Also |
| note that you want csdpmi7b.zip even if you run under Windows or |
| DOSEMU because the XZ Utils Makefile will embed cwsdstub.exe to |
| the resulting xz.exe. |
| |
| See the instructions in readme.1st found from djdev205.zip. Here's |
| a short summary, but you should still read readme.1st. |
| |
| C:\> mkdir DJGPP |
| C:\> cd DJGPP |
| C:\DJGPP> c:\download\unzip32 c:\download\djdev205.zip |
| C:\DJGPP> c:\download\unzip32 c:\download\bnu234b.zip |
| C:\DJGPP> c:\download\unzip32 c:\download\gcc920b.zip |
| C:\DJGPP> c:\download\unzip32 c:\download\mak43b.zip |
| C:\DJGPP> c:\download\unzip32 c:\download\csdpmi7b.zip |
| |
| C:\DJGPP> set PATH=C:\DJGPP\BIN;%PATH% |
| C:\DJGPP> set DJGPP=C:\DJGPP\DJGPP.ENV |
| |
| You may want to add the last two lines into AUTOEXEC.BAT or have, |
| for example, DJGPP.BAT which you can run before using DJGPP. |
| |
| Make sure you use completely upper case path in the DJGPP environment |
| variable. This is not required by DJGPP, but the XZ Utils Makefile is |
| a bit stupid and expects that everything in DJGPP environment variable |
| is uppercase. |
| |
| |
| Building |
| |
| You need to have an environment that supports long filenames (LFN). |
| Once you have built XZ Utils, the resulting binaries can be run |
| without long filename support. |
| |
| Run "make" in this directory (the directory containing this |
| INSTALL.txt). You should get xz.exe (and a bunch of temporary files). |
| Other tools are not built. Having e.g. xzdec.exe doesn't save much |
| space compared to xz.exe because the DJGPP runtime makes the .exe |
| quite big anyway. |
| |