Add incomplet long double math support to libmingwex.a

winsup/mingw/mingwex/math/fp_constsf.c

@@ -0,0 +1,12 @@
+#include "fp_consts.h"
+
+const union _ieee_rep __QNANF = { __FLOAT_QNAN_REP };   
+const union _ieee_rep __SNANF = { __FLOAT_SNAN_REP };   
+const union _ieee_rep __INFF = { __FLOAT_INF_REP };   
+const union _ieee_rep __DENORMF = { __FLOAT_DENORM_REP };   
+
+/* ISO C99 */
+#undef nanf
+/* FIXME */
+float nanf(const char * tagp __attribute__((unused)) )
+  { return __QNANF.float_val;}