1. An executable code generation program of creating executable code for running a real time operating system built-in application on a target device, by running the above code in a computer, the application being usable by calling resource of the real time operating system as an object, the above program comprising: a real time operating system setting information optimization unit of receiving system configuration information; and a compile unit of receiving application source code of the application, wherein the real time operating system setting information optimization unit creates real time operating system resource creating information including attribute information of a usable object and supplies the above information to the compile unit, based on the received system configuration information, wherein the compile unit analyzes the received application source code, to create first real time operating system setting information including a list of the objects called by the application and supply the above information to the real time operating system setting information optimization unit, and wherein the real time operating system setting information optimization unit creates optimized real time operating system setting information, based on the first real time operating system setting information and the system configuration information, and creates a real time operating system setting information file including the optimized real time operating system setting information, hence to create the executable code, based on the real time operating system setting information file, the application source code, and the real time operating system.