added a bunch of math fn decl for __DARWIN_OSX__
added a bunch of math fn decl for __DARWIN_OSX__

nakijun/vtp,markraz/vtp,nakijun/vtp,markraz/vtp,seanisom/vtp,markraz/vtp,seanisom/vtp,seanisom/vtp,seanisom/vtp,nakijun/vtp,markraz/vtp,nakijun/vtp,markraz/vtp,seanisom/vtp,nakijun/vtp