$ perl -V:timeincl
timeincl='/usr/include/x86_64-linux-gnu/sys/time.h /usr/include/time.h ';

##</code><code>##

use 5.010;
use strict;
use warnings;

use Convert::Binary::C;
use Config;

my $c = Convert::Binary::C->new;
$c->Include(
    '/usr/include',
    '/usr/include/x86_64-linux-gnu/sys/',
    '/usr/include/x86_64-linux-gnu/'
)->Define('__WORDSIZE=64');
$c->parse_file('/usr/include/x86_64-linux-gnu/sys/time.h');
my $timeval = $c->pack( 'struct timeval', { tv_sec => 1, tv_usec => 0 } );

##</code><code>##

bits/wordsize.h, line 7: macro '__WORDSIZE' redefined unidentically
	included from /usr/include/x86_64-linux-gnu//sys/cdefs.h:378
	included from /usr/include/features.h:357
	included from /usr/include/x86_64-linux-gnu/sys/time.h:23 at pack_timeval2.pl line 10.