Remove heavy optims flags from makefile and add predefined function attributes instead.

cpp/types.hpp

@@ -20,6 +20,11 @@
 #include <cstdint>
 
 #define RK_EXPORT extern "C"
+#define RK_HOT gnu::hot
+#define RK_FLATTEN gnu::flatten
+#define RK_UNROLLED gnu::optimize("unroll-loops")
+#define RK_FAST gnu::optimize("Ofast")
+#define RK_INVALID_HANDLE nullptr
 #define RK_FLAG(_bit) (1 << (_bit))
 
 typedef bool rk_bool;