use Inline (
    C    => 'DATA',
    INC  => '-IE:\pjproject-1.0.1\pjlib\include',
    LIBS => '-LE:\pjproject-1.0.1\pjlib\lib -lpj'
);  #          ^ path to compiled libraries   ^ name of a library to link with
    # !!! Fill in real values for LIB, not my guesses !!!

...

__DATA__
__C__
#include <stdio.h>
#include "pj/config.h"

...