add iOS support

engine/main.cpp

@@ -8,11 +8,12 @@
 #include "keymap.h"
 
 #ifdef __APPLE__
+
+#ifdef TARGET_OS_OSX
 #include <CoreFoundation/CoreFoundation.h>
 #include <Cocoa/Cocoa.h>
 #include <CoreVideo/CoreVideo.h>
 #include <OpenGL/OpenGL.h>
-
 @interface View : NSOpenGLView
 {
     CVDisplayLinkRef dl;
@@ -360,6 +361,7 @@ int main(int argc, const char * argv[])
     return 0;
 }
 #endif
+#endif
 
 #ifdef _WIN32