Good moring! Could the posix_spawn() work (branch heads/topic/posix_spawn) be merged now, but the new version kept off by default unless an option in the CYGWIN env var is set? That would make testing IMO much easier... Ced -- Cedric Blancher <cedric.blancher@gmail.com> [https://plus.google.com/u/0/+CedricBlancher/] Institute Pasteur