http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43682
--- Comment #4 from Chen Chen <aflyhorse at foxmail dot com> 2011-11-20 07:18:28 UTC --- I've noticed the gc-7.2alpha6.tar.gz have released. The Boehm-GC has been a major obscure for the gcj port of Mingew64 I think... (embarrassed) http://www.hpl.hp.com/personal/Hans_Boehm/gc/gc_source/