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88 lines
3.4 KiB
Text
88 lines
3.4 KiB
Text
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XZ Utils on 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, although the Windows version of
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XZ Utils is recommended under Windows 95 and later.
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This is currently 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 especially if you checked out a development version,
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building for DOS probably won't work without updating Makefile
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and config.h first.
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Getting and Installing DJGPP
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You may use <http://www.delorie.com/djgpp/zip-picker.html> to help
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deciding what to download, but as of writing (2010-10-09) that may
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not be the most convenient way taking into account what components
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are actually required to build XZ Utils. However, using the
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zip-picker can still be worth doing to get nice short summary of
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installation instructions (they can be found from readme.1st too).
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For a more manual method, first select a mirror from
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<http://www.delorie.com/djgpp/getting.html>. You need
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the following files:
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unzip32.exe (if you don't already have a LFN-capable unzipper)
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beta/v2/djdev204.zip
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v2gnu/bnu219b.zip
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v2gnu/gcc444b.zip
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v2gnu/mak3791b.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 djdev203.zip is too old to build XZ Utils; you need at
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least djdev204.zip. Also note that you want csdpmi7b.zip even if you
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run under Windows or DOSEMU, because the XZ Utils Makefile will embed
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cwsdstub.exe to the resulting binaries.
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See the instructions in readme.1st found from djdev204.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\djdev204.zip
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C:\DJGPP> c:\download\unzip32 c:\download\bnu219b.zip
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C:\DJGPP> c:\download\unzip32 c:\download\gcc444b.zip
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C:\DJGPP> c:\download\unzip32 c:\download\mak3791b.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 README).
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You should get xz.exe (and a bunch of temporary files). Other tools
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are not built. Having e.g. xzdec.exe doesn't save much space compared
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to xz.exe, because the DJGPP runtime makes the .exe quite big anyway.
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Bugs
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xz doesn't necessarily work in Dosbox. It should work in DOSEMU.
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Pressing Ctrl-c or Ctrl-Break won't remove the incomplete target file
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when running under Windows XP Command Prompt (something goes wrong
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with SIGINT handling). Use the Windows build of XZ Utils on Windows.
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