http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56404
--- Comment #2 from argentinator.gcc.questions at outlook dot com 2013-02-20 00:21:56 UTC --- (In reply to comment #1) > Report this to the mingw folks since they are the ones who provide > fpclassify. > That is they provide the header file which does fpclassify and GCC does not. Sorry because my ignorance. Thanks by your advice.