http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56332
--- Comment #2 from Mikael Pettersson <mikpe at it dot uu.se> 2013-02-15 08:39:20 UTC --- For mingw-w64 isn't the triplet supposed to be 'x86_64-w64-mingw32'? Or has the 'old mingw' now grown its own 64-bit support?