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47 lines
2.1 KiB
Markdown
47 lines
2.1 KiB
Markdown
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Notes for the DOS platform with DJGPP
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=====================================
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OpenSSL has been ported to DJGPP, a Unix look-alike 32-bit run-time
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environment for 16-bit DOS, but only with long filename support.
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If you wish to compile on native DOS with 8+3 filenames, you will
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have to tweak the installation yourself, including renaming files
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with illegal or duplicate names.
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You should have a full DJGPP environment installed, including the
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latest versions of DJGPP, GCC, BINUTILS, BASH, etc. This package
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requires that PERL and the PERL module `Text::Template` also be
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installed (see [NOTES-PERL.md](NOTES-PERL.md)).
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All of these can be obtained from the usual DJGPP mirror sites or
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directly at <http://www.delorie.com/pub/djgpp>. For help on which
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files to download, see the DJGPP "ZIP PICKER" page at
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<http://www.delorie.com/djgpp/zip-picker.html>. You also need to have
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the WATT-32 networking package installed before you try to compile
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OpenSSL. This can be obtained from <http://www.watt-32.net/>.
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The Makefile assumes that the WATT-32 code is in the directory
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specified by the environment variable WATT_ROOT. If you have watt-32
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in directory `watt32` under your main DJGPP directory, specify
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`WATT_ROOT="/dev/env/DJDIR/watt32"`.
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To compile OpenSSL, start your BASH shell, then configure for DJGPP by
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running `./Configure` with appropriate arguments:
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./Configure no-threads --prefix=/dev/env/DJDIR DJGPP
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And finally fire up `make`. You may run out of DPMI selectors when
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running in a DOS box under Windows. If so, just close the BASH
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shell, go back to Windows, and restart BASH. Then run `make` again.
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RUN-TIME CAVEAT LECTOR
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--------------
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Quoting FAQ:
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"Cryptographic software needs a source of unpredictable data to work
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correctly. Many open source operating systems provide a "randomness
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device" (`/dev/urandom` or `/dev/random`) that serves this purpose."
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As of version 0.9.7f DJGPP port checks upon `/dev/urandom$` for a 3rd
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party "randomness" DOS driver. One such driver, `NOISE.SYS`, can be
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obtained from <http://www.rahul.net/dkaufman/index.html>.
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