IO::Pty::HalfDuplex has some portability problems. There's also the typo read. There is no method read:-). Use recv instead. Neither Ptrace nor SysctlPoll worked, even though the module passed all tests. Here's what worked for me: 
#!/usr/bin/perl

use strict;
use warnings;
use IO::Pty::HalfDuplex;

my $pty = IO::Pty::HalfDuplex->new;
$pty->spawn("nethack") or warn "Spawn failed: $!";

unless ( $pty->is_active ) {
    warn "$pty is not active";
}
else {
    print $pty->recv;
}

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In reply to Re: CPAN.pm says module is up-to-date, but running it says XS code is not built. by Khen1950fx
in thread CPAN.pm says module is up-to-date, but running it says XS code is not built. by jonadab

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