Hey Erik >Configuring for a i686-pc-cygwin host. > *** This configuration is not supported in the following > target-libffi target-boehm-gc target-zlib target-libjava It says about all, eh? :P Take a look at the faq, maybe it'll help (point 5) http://gcc.gnu.org/java/faq.html#1_4 Or the cross compiler faq and their list http://www.objsw.com/CrossGCC/FAQ-4.html#ss4.7 There's also a section in the gcc manual starting at page 273