01-27-2011
My main job for the last 10 years or so is porting different low level security apps to UNIX platforms. AIX is almost always the "difficult" one. Everything is always implemented differently. I code around the native security databases (/etc/passwd, shadow, /etc/security, TCB, etc) and AIX is always the strange one. I do have to say though that HP-UX has its quirks, although it generally conforms. Linux is easy, cos you can find the code to everything, so you can code round stuff or at least find out how it works. And there are always lots of people that have tried stuff or implemented stuff and its all relatively up-to-date. I have to admit though that Solaris is my favourite...things just seem to work, and if they dont a quick O/S patch usually fixes it. That is until Solaris 10 where, although I love some of the additions, I hate the horrible SMF service stuff, and process contracts that can make life a pain.
Anyhew, on the linker front, that is why I suggested libtool. You *can* make build systems that build generically and you dont need to know this low level stuff.
But thats all my 2c worth...other people have different views on libtool.
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LEARN ABOUT CENTOS
pod::simple::debug
Pod::Simple::Debug(3) User Contributed Perl Documentation Pod::Simple::Debug(3)
NAME
Pod::Simple::Debug -- put Pod::Simple into trace/debug mode
SYNOPSIS
use Pod::Simple::Debug (5); # or some integer
Or:
my $debuglevel;
use Pod::Simple::Debug ($debuglevel, 0);
...some stuff that uses Pod::Simple to do stuff, but which
you don't want debug output from...
$debug_level = 4;
...some stuff that uses Pod::Simple to do stuff, but which
you DO want debug output from...
$debug_level = 0;
DESCRIPTION
This is an internal module for controlling the debug level (a.k.a. trace level) of Pod::Simple. This is of interest only to Pod::Simple
developers.
CAVEATS
Note that you should load this module before loading Pod::Simple (or any Pod::Simple-based class). If you try loading Pod::Simple::Debug
after &Pod::Simple::DEBUG is already defined, Pod::Simple::Debug will throw a fatal error to the effect that "it's s too late to call
Pod::Simple::Debug".
Note that the "use Pod::Simple::Debug ($x, somenum)" mode will make Pod::Simple (et al) run rather slower, since &Pod::Simple::DEBUG won't
be a constant sub anymore, and so Pod::Simple (et al) won't compile with constant-folding.
GUTS
Doing this:
use Pod::Simple::Debug (5); # or some integer
is basically equivalent to:
BEGIN { sub Pod::Simple::DEBUG () {5} } # or some integer
use Pod::Simple ();
And this:
use Pod::Simple::Debug ($debug_level,0); # or some integer
is basically equivalent to this:
my $debug_level;
BEGIN { $debug_level = 0 }
BEGIN { sub Pod::Simple::DEBUG () { $debug_level }
use Pod::Simple ();
SEE ALSO
Pod::Simple
The article "Constants in Perl", in The Perl Journal issue 21. See <http://interglacial.com/tpj/21/>
SUPPORT
Questions or discussion about POD and Pod::Simple should be sent to the pod-people@perl.org mail list. Send an empty email to
pod-people-subscribe@perl.org to subscribe.
This module is managed in an open GitHub repository, <https://github.com/theory/pod-simple/>. Feel free to fork and contribute, or to clone
<git://github.com/theory/pod-simple.git> and send patches!
Patches against Pod::Simple are welcome. Please send bug reports to <bug-pod-simple@rt.cpan.org>.
COPYRIGHT AND DISCLAIMERS
Copyright (c) 2002 Sean M. Burke.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of
merchantability or fitness for a particular purpose.
AUTHOR
Pod::Simple was created by Sean M. Burke <sburke@cpan.org>. But don't bother him, he's retired.
Pod::Simple is maintained by:
o Allison Randal "allison@perl.org"
o Hans Dieter Pearcey "hdp@cpan.org"
o David E. Wheeler "dwheeler@cpan.org"
perl v5.16.3 2013-05-03 Pod::Simple::Debug(3)