fixes for mobile

hyper.h

@@ -7,7 +7,9 @@
 #define VERNUM_HEX 0xA505
 
 #include <stdarg.h>
+#if !ISSTEAM
 #include "hyper_function.h"
+#endif
 
 namespace hr {
 
@@ -16,7 +18,11 @@ void ignore(T&&) {
   // placate GCC's overzealous -Wunused-result
   }
 
+#if USE_STDFUNCTION
+using std::function;
+#else
 template<class Sig> using function = hyper_function<Sig>;
+#endif
 
 // functions and types used from the standard library
 using std::vector;