2 Building XZ Utils for DOS
3 =========================
7 This document explains how to build XZ Utils for DOS using DJGPP.
8 The resulting binaries should run at least on various DOS versions
9 and under Windows 95/98/98SE/ME.
11 This is somewhat experimental and has got very little testing.
13 Note: Makefile and config.h are updated only now and then. This
14 means that if you checked out a development version, building for
15 DOS might not work without updating Makefile and config.h first.
18 Getting and Installing DJGPP
20 You may use <https://www.delorie.com/djgpp/zip-picker.html> to help
21 deciding what to download. If you are only interested in building
22 XZ Utils, the zip-picker may list files that you don't strictly
23 need. However, using the zip-picker can still be worth it to get a
24 nice short summary of installation instructions (they can be found
27 For a more manual method, first select a mirror from
28 <https://www.delorie.com/djgpp/getting.html> and go the
29 subdirectory named "current". You need the following files:
31 unzip32.exe (if you don't already have a LFN-capable unzipper)
38 If newer versions are available, probably you should try them first.
39 Note that versions older than djdev205.zip aren't supported. Also
40 note that you want csdpmi7b.zip even if you run under Windows or
41 DOSEMU because the XZ Utils Makefile will embed cwsdstub.exe to
44 See the instructions in readme.1st found from djdev205.zip. Here's
45 a short summary, but you should still read readme.1st.
49 C:\DJGPP> c:\download\unzip32 c:\download\djdev205.zip
50 C:\DJGPP> c:\download\unzip32 c:\download\bnu234b.zip
51 C:\DJGPP> c:\download\unzip32 c:\download\gcc920b.zip
52 C:\DJGPP> c:\download\unzip32 c:\download\mak43b.zip
53 C:\DJGPP> c:\download\unzip32 c:\download\csdpmi7b.zip
55 C:\DJGPP> set PATH=C:\DJGPP\BIN;%PATH%
56 C:\DJGPP> set DJGPP=C:\DJGPP\DJGPP.ENV
58 You may want to add the last two lines into AUTOEXEC.BAT or have,
59 for example, DJGPP.BAT which you can run before using DJGPP.
61 Make sure you use completely upper case path in the DJGPP environment
62 variable. This is not required by DJGPP, but the XZ Utils Makefile is
63 a bit stupid and expects that everything in DJGPP environment variable
69 You need to have an environment that supports long filenames (LFN).
70 Once you have built XZ Utils, the resulting binaries can be run
71 without long filename support.
73 Run "make" in this directory (the directory containing this
74 INSTALL.txt). You should get xz.exe (and a bunch of temporary files).
75 Other tools are not built. Having e.g. xzdec.exe doesn't save much
76 space compared to xz.exe because the DJGPP runtime makes the .exe