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Full Discussion: Undefined reference to Error
Top Forums Programming Undefined reference to Error Post 98757 by jim mcnamara on Friday 10th of February 2006 04:47:56 PM
Old 02-10-2006
That's not 'an error' - there are at least 2 problems:

1. You have not declared the main() function in any of the code blocks you've compiled.

2. You are not including all of the source in the -OR-
3. You are not telling cc where to look for libraries or .o files that have HandleUserTransaction, and the other functions shown. -OR-
2+3 you didn't compile all the source and you didn't tell cc where to look for special libraries or archives.
 

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LEARN ABOUT DEBIAN

pmload

PMLOAD(1p)						User Contributed Perl Documentation						PMLOAD(1p)

NAME

       pmload - show what files a given module loads at compile time

DESCRIPTION

       Given an argument of a module name, show all the files that are loaded directly or indirectly when the module is used at compile-time.

EXAMPLES

	   $ pmload IO::Handle
	   /usr/local/devperl/lib/5.00554/Exporter.pm
	   /usr/local/devperl/lib/5.00554/Carp.pm
	   /usr/local/devperl/lib/5.00554/strict.pm
	   /usr/local/devperl/lib/5.00554/vars.pm
	   /usr/local/devperl/lib/5.00554/i686-linux/DynaLoader.pm
	   /usr/local/devperl/lib/5.00554/i686-linux/IO/Handle.pm
	   /usr/local/devperl/lib/5.00554/Symbol.pm
	   /usr/local/devperl/lib/5.00554/i686-linux/IO/File.pm
	   /usr/local/devperl/lib/5.00554/SelectSaver.pm
	   /usr/local/devperl/lib/5.00554/i686-linux/Fcntl.pm
	   /usr/local/devperl/lib/5.00554/AutoLoader.pm
	   /usr/local/devperl/lib/5.00554/i686-linux/IO.pm
	   /usr/local/devperl/lib/5.00554/i686-linux/IO/Seekable.pm

	   $ cat `pmload IO::Socket` | wc -l
	      4015

	   $ oldperl -S pmload Tk
	   /usr/lib/perl5/site_perl/Tk/Pretty.pm
	   /usr/lib/perl5/Symbol.pm
	   /usr/lib/perl5/site_perl/Tk/Frame.pm
	   /usr/lib/perl5/site_perl/Tk/Toplevel.pm
	   /usr/lib/perl5/strict.pm
	   /usr/lib/perl5/Exporter.pm
	   /usr/lib/perl5/vars.pm
	   /usr/lib/perl5/site_perl/auto/Tk/Wm/autosplit.ix
	   /usr/lib/perl5/site_perl/auto/Tk/Widget/autosplit.ix
	   /usr/lib/perl5/site_perl/Tk.pm
	   /usr/lib/perl5/i386-linux/5.00404/DynaLoader.pm
	   /usr/lib/perl5/site_perl/auto/Tk/Frame/autosplit.ix
	   /usr/lib/perl5/site_perl/auto/Tk/Toplevel/autosplit.ix
	   /usr/lib/perl5/Carp.pm
	   /usr/lib/perl5/site_perl/auto/Tk/autosplit.ix
	   /usr/lib/perl5/site_perl/Tk/CmdLine.pm
	   /usr/lib/perl5/site_perl/Tk/MainWindow.pm
	   /usr/lib/perl5/site_perl/Tk/Submethods.pm
	   /usr/lib/perl5/site_perl/Tk/Configure.pm
	   /usr/lib/perl5/AutoLoader.pm
	   /usr/lib/perl5/site_perl/Tk/Derived.pm
	   /usr/lib/perl5/site_perl/Tk/Image.pm
	   /usr/lib/perl5/site_perl/Tk/Wm.pm
	   /usr/lib/perl5/site_perl/Tk/Widget.pm

NOTE

       If the programmers used a delayed "require", those files won't show up.	Furthermore, this doesn't show all possible files that get opened,
       just those that those up in %INC.  Most systems have a way to trace system calls.  You can use this to find the real answer.  First, get a
       baseline with no modules loaded.

	   $ strace perl -e 1 2>&1 | perl -nle '/^open("(.*?)".* = [^-]/ && print $1'
	   /etc/ld.so.cache
	   /lib/libnsl.so.1
	   /lib/libdb.so.2
	   /lib/libdl.so.2
	   /lib/libm.so.6
	   /lib/libc.so.6
	   /lib/libcrypt.so.1
	   /dev/null

	   $ strace perl -e 1 2>&1 | grep -c '^open.*= [^-]'
	   8

       Now add module loads and see what you get:

	   $ strace perl -MIO::Socket -e 1 2>&1 | grep -c '^open.*= [^-]'
	   24

	   $ strace perl -MTk -e 1 2>&1 | grep -c '^open.*= [^-]'
	   35

SEE ALSO

       Devel::Loaded, plxload(1).

AUTHORS and COPYRIGHTS
       Copyright (C) 1999 Tom Christiansen.

       Copyright (C) 2006-2008 Mark Leighton Fisher.

       This is free software; you can redistribute it and/or modify it under the terms of either: (a) the GNU General Public License as published
       by the Free Software Foundation; either version 1, or (at your option) any later version, or (b) the Perl "Artistic License".  (This is the
       Perl 5 licensing scheme.)

       Please note this is a change from the original pmtools-1.00 (still available on CPAN), as pmtools-1.00 were licensed only under the Perl
       "Artistic License".

perl v5.10.1							    2010-02-22								PMLOAD(1p)
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