================================================================ Dear Bug Team! when try build XEmacs in cygwin 1.7, the linker failed with following error message: undefined reference to `_IID_IPersistFile' This error is caused by the new libuuid.so delivered by cygwin1.7. With cygwin 1.7 there's multi-copy of libuuid delivered, the win32 copy of libuuid must be explictly linked instead of passing -luuid flag to linker. Attached is a simple patch for configure.ac and configure script. It's better to use the -L flag so that it will still link on Cygwin 1.5.