Hello, I don't know if possibly the folks on this list have any knowledge of autoconf configure? Specifically, I have a system I'd like to build in either x86 default Linux GCC environment, or ARM cross compiler. I want to specify "./configure --target" (usage?) and when x86 or ARM (or some derived Makefile variables) is detected, include the appropriate $(TARGET_OS).make file. The docs on config.sub and config.guess are rather fuzzy. The examples I am digging up are vastly more complex than we need. Possible? If so, how? Regards, Michael Powell