use strict;
use warnings;

use Inline C => "DATA";
xyz();
__DATA__
__C__
xyz();

__DATA__
__C__

#define __XX__ unsigned

__XX__
int xyz(){ printf("hhaahah\n"); return 1; }

##</code><code>##

Undefined subroutine &main::xyz called at a.pl line 8.

##</code><code>##

use strict;
use warnings;

use Inline(C => <<'EOC');

#define __XX__ unsigned

__XX__
int xyz(){ printf("hhaahah\n"); return 1; }
EOC
xyz();