A pthread-library I'm using was written for FreeBSD, and uses the
rfork() call to create new thread. Adding an rfork() system call
was simple enough: just interpret the parameters and pass them
along to fork1().

Just a few nits I want clarification to:
First, clone() seems to be called __clone(). This probably has some
namespace implications, but I'm not 100% sure of what they are.

Second, what's an appropriate place for the rfork flags? clone
flags are located in sys/sched.h, as they are in linux. FreeBSD
hold rfork flags in sys/unistd.h.

thanks,
  antti

-- 
Antti Kantee                                      Cubical Solutions Ltd.
gsm  : +358 400 417 416                           http://www.cubical.fi/
email: antti.kantee@cubical.fi