http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50895 --- Comment #3 from Kai Tietz <ktietz at gcc dot gnu.org> 2012-02-14 20:21:59 UTC --- Well, the 4.7 error you get here is due unsupport posix-threading support for libjava on Windows targets. Not sure if I want to enhance libjava that it supports this feature.