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diff --git a/dos/INSTALL.txt b/dos/INSTALL.txt new file mode 100644 index 0000000..e5ba85b --- /dev/null +++ b/dos/INSTALL.txt @@ -0,0 +1,78 @@ + +Building XZ Utils for DOS +========================= + +Introduction + + 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. + + +Getting and Installing DJGPP + + 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. + |