Hello all, I'm new to darwinbuild and was having trouble trying to get it to build at all. I was getting the following error message. Undefined symbols for architecture ppc64: "_object_file_type", referenced from: SHA1DigestMachO::SHA1DigestMachO(char const*)in Digest.o Looking a bit closer, I realized that the problem was not the libredo.o that is being shipped as a binary in darwinbuild, but a libred_prebind.a that was already sitting on my system from something else. According to http://forums.macosxhints.com/archive/index.php/t-67796.html this file was likely installed when I tested out PocketMac for my Blackberry. After removing PocketMac, it appears to leave behind a bunch of files that should probably have been removed. Unfortunately, the darwinbuild makefile was picking up the file from that old installation. After moving that file out of the way, I was able to get darwinbuild to compile. Now, I can move on to the real goal of building some Darwin code. Hopefully this message will help someone else out if they run into this problem. Thanks.