http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46455
--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> 2010-11-15 21:54:40 UTC --- Butenhof's book says you don't need to destroy a mutex/condvar that was statically initialized, so given the FreeBSD bug I will only define the destructor when the __GTHREAD_XXX_INIT macro is not available
