As Christopher Faylor sais, such a way is very wrong. Additionally, I found it is not a matter of pqcomm.h, but X header. I am very sorry to sending such a silly mail. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/