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INSTALLATION ON THE DOS PLATFORM WITH DJGPP
-------------------------------------------
OpenSSL has been ported to DJGPP, a 32-bit run-time environment for
16-bit DOS, but only with long filename support. If you wish to
compile on native DOS with 8+3 filenames, you will have to tweak the
installation yourself, including renaming files with illegal
or duplicate names.
You should have a full DJGPP environment installed, including the
latest versions of DJGPP, GCC, BINUTILS, BASH, etc. This package
requires that PERL and BC also be installed.
All of these can be obtained from the usual DJGPP mirror sites, such
as "ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp". You also need to
have the WATT-32 networking package installed before you try to compile
openssl. This can be obtained from "http://www.bgnett.no/~giva/".
The Makefile assumes that the WATT-32 code is in the directory
specified by the environment variable WATT_ROOT. If you have watt-32
in directory "watt32" under your main DJGPP directory, specify
WATT_ROOT="/dev/env/DJDIR/watt32".
To compile openssl, start your BASH shell. Then configure for DOS by
running "./Configure" with appropriate arguments. The basic syntax for
DOS is:
./Configure no-threads --prefix=/dev/env/DJDIR DJGPP
You may run out of DPMI selectors when running in a DOS box under
Windows. If so, just close the BASH shell, go back to Windows, and
restart BASH. Then run "make" again.
Building openssl under DJGPP has been tested with DJGPP 2.03,
GCC 2.952, GCC 2.953, perl 5.005_02 and perl 5.006_01.
RUN-TIME CAVEAT LECTOR
--------------
Quoting FAQ:
"Cryptographic software needs a source of unpredictable data to work
correctly. Many open source operating systems provide a "randomness
device" (/dev/urandom or /dev/random) that serves this purpose."
As of version 0.9.7f OpenSSL checks upon /dev/urandom$ for a 3rd party DOS
driver. One such driver implemented by Robert Rothenberg "Walking-Owl"
can be obtained from "http://www.funet.fi/pub/crypt/random/noise063.zip."
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