According to the Project Builder release notes, when you need your Kernel extension to work under 10.1, you have to compile it with the gcc 2.95 version. I'm in a more complex situation after various attempts. I'm compiling my kext under 10.1. I'm compiling my userland tool on 10.2 using gcc 3 or 2.95. In these conditions, the userland tool can't communicate with the kext using NKE sockets in 10.2. If I compile the userland tool under 10.1 too, it can communicate with the kext in 10.1 and 10.2. If I compile the kext and the userland too under 10.2 with gcc 3, then it's working on 10.2 but not on 10.1. So am I right to conclude that to maintain 10.1 compatibility, we need to compile under 10.1 both the kext and userland tool? _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.