This was the first thing I did :), before I downloaded the docs, so I didn't realise there was a problem ... this works for me, on RedHat Linux 4.2 with Xavier's Linuxthreads 0.5: J'ai réussi (avant de lire les informations---donc, je n'ai pas su que il y aurait une problème ...) avec les commandes suivantes: ocamlopt.opt -output-obj \ -I /usr/local/packages/dist/ocaml-1.06/otherlibs/systhreads \ thread.cmx threadtest.ml gcc -o threadtest camlprog.o \ -L /usr/local/packages/dist/ocaml-1.06/otherlibs/systhreads -lthreadsnat \ -L /usr/local/packages/inst/ocaml-1.06/lib -lunix -lasmrun \ -lpthread -lm