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.\" ========================================================================
.\"
.IX Title "PMLOAD 1p"
.TH PMLOAD 1p "2014-02-04" "perl v5.18.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
pmload \- show what files a given module loads at compile time
.SH "DESCRIPTION"
.IX Header "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.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
.Vb 10
\&    $ 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
.Ve
.SH "NOTE"
.IX Header "NOTE"
If the programmers used a delayed \f(CW\*(C`require\*(C'\fR, those files won't show up.
Furthermore, this doesn't show all possible files that get opened,
just those that those up in \f(CW%INC\fR.  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.
.PP
.Vb 9
\&    $ strace perl \-e 1 2>&1 | perl \-nle \*(Aq/^open\e("(.*?)".* = [^\-]/ && print $1\*(Aq
\&    /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 \*(Aq^open.*= [^\-]\*(Aq
\&    8
.Ve
.PP
Now add module loads and see what you get:
.PP
.Vb 2
\&    $ strace perl \-MIO::Socket \-e 1 2>&1 | grep \-c \*(Aq^open.*= [^\-]\*(Aq
\&    24
\&
\&    $ strace perl \-MTk \-e 1 2>&1 | grep \-c \*(Aq^open.*= [^\-]\*(Aq
\&    35
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Devel::Loaded, \fIplxload\fR\|(1).
.SH "AUTHORS and COPYRIGHTS"
.IX Header "AUTHORS and COPYRIGHTS"
Copyright (C) 1999 Tom Christiansen.
.PP
Copyright (C) 2006\-2014 Mark Leighton Fisher.
.SH "LICENSE"
.IX Header "LICENSE"
This is free software; you can redistribute it and/or modify it
under the terms of either:
(a) the \s-1GNU\s0 General Public License as published by the Free
Software Foundation; either version 1, or (at your option) any
later version, or
(b) the Perl \*(L"Artistic License\*(R".
(This is the Perl 5 licensing scheme.)
.PP
Please note this is a change from the
original pmtools\-1.00 (still available on \s-1CPAN\s0),
as pmtools\-1.00 were licensed only under the
Perl \*(L"Artistic License\*(R".