Android NDK 做為效能的加速手段而使用到 C 或是 C++，所以會使用對應的 compiler suite：
The NDK is a toolset that allows you to implement parts of your app using native-code languages such as C and C++. Typically, good use cases for the NDK are CPU-intensive applications such as game engines, signal processing, and physics simulation.
PSA: Everyone should be switching to Clang.
GCC in the NDK is now deprecated.