In file included from /usr/i686-w64-mingw32/include/ruby-2.2.0/ruby/defines.h:163:0,
                 from /usr/i686-w64-mingw32/include/ruby-2.2.0/ruby/ruby.h:29,
                 from /usr/i686-w64-mingw32/include/ruby-2.2.0/ruby.h:33,
                 from /home/netz/mkxp-pref/mkxp/binding-mri/binding-util.h:25,
                 from /home/netz/mkxp-pref/mkxp/binding-mri/binding-mri.cpp:23:
/usr/i686-w64-mingw32/include/boost/functional/hash/detail/float_functions.hpp: In member function 'Float boost::hash_detail::call_frexp<Float>::operator()(Float, int*) const':
/usr/i686-w64-mingw32/include/ruby-2.2.0/ruby/win32.h:802:23: error: expected unqualified-id before '__extension__'
 #define frexp(_X, _Y) __extension__ ({\
                       ^
/usr/i686-w64-mingw32/include/ruby-2.2.0/ruby/win32.h:802:23: error: expected ';' before '__extension__'
make[2]: *** [CMakeFiles/mkxp.dir/build.make:1243: CMakeFiles/mkxp.dir/binding-mri/binding-mri.cpp.obj] Error 1
make[1]: *** [CMakeFiles/Makefile2:68: CMakeFiles/mkxp.dir/all] Error 2
make: *** [Makefile:84: all] Error 2