On 03/02/2015 19:50, Thomas Wuillemin wrote: > clang -Wall -Wextra -pedantic -g -O0 dummy.c -o dummy.exe As a reference point this works fine on FreeBSD with both:- FreeBSD clang version 3.4.1 (tags/RELEASE_34/dot1-final 208032) 20140512 FreeBSD clang version 3.5.1 (tags/RELEASE_351/final 225668) 20150115 -- 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