cannot upgrade 2.1.6 to 2.1.7

Hi, If i dont ve pthread.h in my system.. then how did the 2.1.6 build work.? but i remove the line callback=wait_for_child_to_die; there is no error. can i remove this line and build or is there any other solution to fix it Thanx & Regards, kachin Keep up with people you care about with Yahoo! India Mail. Learn how. http://in.overview.mail.yahoo.com/connectmore