I am reusing a legacy C library in an iOS app and in an Android app. I want to customize some macro definitions (e.g. for logging). Are there standard defines to check for (using #ifdef) whether the code is being compiled for iOS or Android/NDK?
__ANDROID__ or ANDROID for Android (compilation with the NDK)
and __APPLE__ on Apple platforms (iOS or OSX)
you should consider creating two separate projects for those platforms with separate output/bin directories but shared source code. Then you just set some define in project properties for android and ios so you can recognize it when compiling
来源：https://stackoverflow.com/questions/4345405/how-to-determine-c-code-is-compiled-for-android-ndk-or-ios