x64版の5.2.0 sjlj(setjmp-jongjmp)出たね
この分だとすぐにsehも出て来そう

http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Personal%20Builds/mingw-builds/5.2.0/threads-posix/sjlj/