This is the command pmloadp that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
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
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