| is there a: | .\ | on windows? Okay, to answer my own question...now I see. Just some simple syntax misunderstandings. On win32 ------------ This works: -Fi..\inc This doesn't work: -Fi\..\inc On GnuLinux -------------- This works input="./system.pp -Fi../unix/" This doesn't work input="system.pp -Fi../unix/" On Mac and other -------------------- Not sure ;)