Check what C libraries get loaded when loading a Perl module

xscheck.pl

#!/usr/bin/env perl
use strict;
use warnings;

sub maps {
    open my $fh, '<', '/proc/self/maps';
    my @lines = <$fh>;
    my %ret = map {
        m{\ {10}(/.+)$} ? ($1,$_) : ()
    } @lines;
    return \%ret;
}

my $before_maps = maps();

my $target = shift;
eval "require $target" or die "Can't load $target: $@\n";

my $after_maps = maps();

delete @{$after_maps}{keys %{$before_maps}};

local $\="\n";
print for sort keys %{$after_maps};