Getting ready

Recall the folder structure of the App3 project. We have the src and jni folders inside our App2 folder. The jni/Android.mk, jni/Application.mk, and build.xml files specify the Android build process. To enable the Windows executable creation, we add a file named Makefile, which references the main.cpp file.

How to do it...

The following is the content of Makefile:

CC = gcc
all:
  $(CC) -o main.exe main.cpp -lgdi32 -lstdc++

The idea is that when we add more and more OS-independent logic, the code resides in .cpp files, which do not reference any OS-specific headers or libraries. For the first few chapters, this simple framework that delegates frame rendering and event handling to portable OS-independent functions (OnDrawFrame(), OnKeyUp() and so on) is enough.

How it works...

All of our examples from the subsequent chapters are buildable for Windows from the command line using a single make all command. Android native code is buildable with a single ndk-build command. We will use this convention throughout the rest of the book.