Hi! If I: $ : >tmp.c $ gcc -E -Wmissing-include-dirs tmp.c >/dev/null I get this annoying warning on stderr: cc1: warning: ../../include/w32api: No such file or directory [enabled by default] Searching the 'net suggests that it's an old bug: http://cygwin.com/ml/cygwin/2013-07/msg00509.html Cheers, Peter -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple