Experimenting in DOS arcana.

[p5sagit/p5-mst-13.2.git] / README.dos

If you read this file _as_is_, just ignore the funny characters you\r
see. It is written in the POD format (see perlpod manpage) which is\r
specially designed to be readable as is.\r
\r
=head1 NAME\r
\r
perldos - Perl under DOS, W31, W95.\r
\r
=head1 SYNOPSIS\r
\r
These are instructions for building Perl under DOS (or w??), using\r
DJGPP v2.01 or later. Under w95 long filenames are supported.\r
\r
=head1 DESCRIPTION\r
\r
Before you start, you should glance through the README file\r
found in the top-level directory where the Perl distribution\r
was extracted.  Make sure you read and understand the terms under\r
which this software is being distributed.\r
\r
This port currently supports MakeMaker (the set of modules that\r
is used to build extensions to perl).  Therefore, you should be\r
able to build and install most extensions found in the CPAN sites.\r
\r
=head2 Prerequisites\r
\r
=over 4\r
\r
=item DJGPP\r
\r
DJGPP is a port of GNU C/C++ compiler and development tools to 32-bit,\r
protected-mode environment on Intel 32-bit CPUs running MS-DOS and compatible\r
operating systems, by DJ Delorie <dj@delorie.com> and friends.\r
\r
For more details (FAQ), check out the home of DJGPP at:\r
\r
        http://www.delorie.com/djgpp/\r
\r
If you have questions about DJGPP, try posting to the DJGPP newsgroup:\r
comp.os.msdos.djgpp, or use the email gateway djgpp@delorie.com.\r
\r
You can find the full DJGPP distribution on any SimTel.Net mirror all over\r
the world. Like:\r
\r
        ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2*\r
\r
You need the following files to build perl (or add new modules):\r
\r
        v2/djdev202.zip\r
        v2/bnu27b.zip\r
        v2gnu/gcc2721b.zip\r
        v2gnu/bsh1147b.zip\r
        v2gnu/mak3761b.zip\r
        v2gnu/fil316b.zip\r
        v2gnu/sed118b.zip\r
        v2gnu/txt122b.zip\r
        v2gnu/dif271b.zip\r
        v2gnu/grep21b.zip\r
        v2gnu/shl112b.zip\r
        v2gnu/gawk303b.zip\r
        v2misc/csdpmi4b.zip \r
\r
or possibly any newer version.\r
\r
=item Pthreads\r
\r
Thread support is not tested in this version of the djgpp perl.\r
\r
=back\r
\r
=head2 Shortcomings of Perl under DOS\r
\r
Perl under DOS lacks some features of perl under UNIX because of\r
deficiencies in the UNIX-emulation, most notably:\r
\r
=over 4\r
\r
=item *\r
\r
fork() and pipe()\r
\r
=item *\r
\r
some features of the UNIX filesystem regarding link count and file dates\r
\r
=item *\r
\r
in-place operation is a little bit broken with short filenames\r
\r
=item *\r
\r
sockets\r
\r
=back\r
\r
=head2 Building\r
\r
=over 4\r
\r
=item *\r
\r
Unpack the source package F<perl5.6*.tar.gz> with djtarx. If you want\r
to use long file names under w95 and also to get Perl to pass all its\r
tests, don't forget to use\r
\r
        set LFN=y\r
	set FNCASE=y\r
\r
before unpacking the archive.\r
\r
=item *\r
\r
Create a "symlink" or copy your bash.exe to sh.exe in your C<($DJDIR)/bin>\r
directory.\r
\r
        ln -s bash.exe sh.exe\r
\r
And make the C<SHELL> environment variable point to this F<sh.exe>:\r
\r
        set SHELL=c:/djgpp/bin/sh.exe (use full path name!)\r
\r
You can do this in F<djgpp.env> too. Add this line BEFORE any section\r
definition:\r
\r
        +SHELL=%DJDIR%/bin/sh.exe\r
\r
=item *\r
\r
If you have F<split.exe> and F<gsplit.exe> in your path, then rename \r
F<split.exe> to F<djsplit.exe>, and F<gsplit.exe> to F<split.exe>.\r
Copy or link F<gecho.exe> to F<echo.exe> if you don't have F<echo.exe>.\r
Copy or link F<gawk.exe> to F<awk.exe> if you don't have F<awk.exe>.\r
\r
=item *\r
\r
Chdir to the djgpp subdirectory of perl toplevel and type the following\r
command:\r
\r
        configure.bat\r
\r
This will do some preprocessing then run the Configure script for you.\r
The Configure script is interactive, but in most cases you\r
just need to press ENTER.\r
\r
If the script says that your package is incomplete, and asks whether\r
to continue, just answer with Y (this can only happen if you don't use\r
long filenames).\r
\r
When Configure asks about the extensions, I suggest IO and Fcntl,\r
and if you want database handling then SDBM_File or GDBM_File\r
(you need to install gdbm for this one). If you want to use the\r
POSIX extension (this is the default), make sure that the stack\r
size of your F<cc1.exe> is at least 512kbyte (you can check this\r
with: C<stubedit cc1.exe>).\r
\r
You can use the Configure script in non-interactive mode too.\r
When I built my F<perl.exe>, I used something like this:\r
\r
        configure.bat -des\r
\r
You can find more info about Configure's command line switches in\r
the F<INSTALL> file.\r
\r
When the script ends, and you want to change some values in the\r
generated F<config.sh> file, then run\r
\r
        sh Configure -S\r
\r
after you made your modifications.\r
\r
IMPORTANT: if you use this C<-S> switch, be sure to delete the CONFIG\r
environment variable before running the script:\r
\r
        set CONFIG=\r
\r
=item *\r
\r
Now you can compile Perl. Type:\r
\r
        make\r
\r
=back\r
\r
=head2 Testing\r
\r
Type:\r
\r
        make test\r
\r
If you're lucky you should see "All tests successful". But there can be\r
a few failed subtests (less than 5 hopefully) depending on some external\r
conditions (e.g. some subtests fail under linux/dosemu or plain dos\r
with short filenames only).\r
\r
=head2 Installation\r
\r
Type:\r
\r
        make install\r
\r
This will copy the newly compiled perl and libraries into your DJGPP\r
directory structure. Perl.exe and the utilities go into C<($DJDIR)/bin>,\r
and the library goes under C<($DJDIR)/lib/perl5>. The pod documentation\r
goes under C<($DJDIR)/lib/perl5/pod>.\r
\r
=head1 AUTHOR\r
\r
Laszlo Molnar, F<laszlo.molnar@eth.ericsson.se>\r
\r
=head1 SEE ALSO\r
\r
perl(1).\r
\r
=cut\r
\r