When build as dynamic engines, the loading functions should be defined

static.

crypto/engine/hw_cswift.c

@@ -259,6 +259,7 @@ static int bind_helper(ENGINE *e)
 	return 1;
 	}
 
+#ifndef ENGINE_DYNAMIC_SUPPORT
 static ENGINE *engine_cswift(void)
 	{
 	ENGINE *ret = ENGINE_new();
@@ -281,6 +282,7 @@ void ENGINE_load_cswift(void)
 	ENGINE_free(toadd);
 	ERR_clear_error();
 	}
+#endif
 
 /* This is a process-global DSO handle used for loading and unloading
  * the CryptoSwift library. NB: This is only set (or unset) during an