Hi, On linux I'm using gcc 3.2.2. If I run a command like: gcc -c foo.c -I/usr/include -v then I'm told that '-I/usr/include/' is being ignored "as it is a non-system directory that duplicates a system directory". That's good - and the way it should be, imho. On Win32 I'm using the MinGW port of gcc 3.4.4. One of the system directories is 'D:/MinGW/include'. If, on Win32, I run a command like: gcc -c foo.c -ID:/MinGW/include -v then I find that D:/MinGW/include is simply inserted at the beginning of the search path - and, furthermore, that D:/MinGW/include *loses* its status as a system directory. This is not good. The question: Do I raise this with you people, or do I raise it with the MinGW folk ? I *think* it's a MinGW implemenation issue (in which case I raise it with them) .... but, faik, it could be something that changed between gcc-3.2.2 and gcc-3.4.4. Can someone confirm ? Cheers, Rob