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