1Notes for the DOS platform with DJGPP 2===================================== 3 4 OpenSSL has been ported to DJGPP, a Unix look-alike 32-bit run-time 5 environment for 16-bit DOS, but only with long filename support. 6 If you wish to compile on native DOS with 8+3 filenames, you will 7 have to tweak the installation yourself, including renaming files 8 with illegal or duplicate names. 9 10 You should have a full DJGPP environment installed, including the 11 latest versions of DJGPP, GCC, BINUTILS, BASH, etc. This package 12 requires that PERL and the PERL module `Text::Template` also be 13 installed (see [NOTES-PERL.md](NOTES-PERL.md)). 14 15 All of these can be obtained from the usual DJGPP mirror sites or 16 directly at <http://www.delorie.com/pub/djgpp>. For help on which 17 files to download, see the DJGPP "ZIP PICKER" page at 18 <http://www.delorie.com/djgpp/zip-picker.html>. You also need to have 19 the WATT-32 networking package installed before you try to compile 20 OpenSSL. This can be obtained from <http://www.watt-32.net/>. 21 The Makefile assumes that the WATT-32 code is in the directory 22 specified by the environment variable WATT_ROOT. If you have watt-32 23 in directory `watt32` under your main DJGPP directory, specify 24 `WATT_ROOT="/dev/env/DJDIR/watt32"`. 25 26 To compile OpenSSL, start your BASH shell, then configure for DJGPP by 27 running `./Configure` with appropriate arguments: 28 29 ./Configure no-threads --prefix=/dev/env/DJDIR DJGPP 30 31 And finally fire up `make`. You may run out of DPMI selectors when 32 running in a DOS box under Windows. If so, just close the BASH 33 shell, go back to Windows, and restart BASH. Then run `make` again. 34 35 RUN-TIME CAVEAT LECTOR 36 -------------- 37 38 Quoting FAQ: 39 40 "Cryptographic software needs a source of unpredictable data to work 41 correctly. Many open source operating systems provide a "randomness 42 device" (`/dev/urandom` or `/dev/random`) that serves this purpose." 43 44 As of version 0.9.7f DJGPP port checks upon `/dev/urandom$` for a 3rd 45 party "randomness" DOS driver. One such driver, `NOISE.SYS`, can be 46 obtained from <http://www.rahul.net/dkaufman/index.html>. 47