thanks for the hardcore version, nice to see the simple way, but i'll do the middle way between h2xs and this one, which would be the one you mentioned before. i'll write the xs glue at the bottom of main.xs convert it with xsubpp and link with the help of ExtUtils. so i stay portable (between perl versions and/or platforms) ;-) thanks for your help, i'll vote for your solution as soon as i've set up a real account :-)