diff XSUB.h.orig XSUB.h
141c141
< #    define XS_EXTERNAL(name) void name(pTHX_ CV* cv __attribute__unused__)
---
> #    define XS_EXTERNAL(name) name(pTHX_ CV* cv __attribute__unused__)

##</code><code>##

use warnings;
use strict;

use Inline (C => 'DATA', libs => ' -lwiringPi');

say();

__DATA__
__C__

#include <stdio.h>
#include <wiringPi.h>

void say(){
    pinMode(1, INPUT);
    printf("hello, world!\n");
}