調べもの：Android Binary Intefarce (ABI)

「Android ABI | Android NDK | Android Developers」
https://developer.android.com/ndk/guides/abis?hl=ja

armeabi-v7a
arm64-v8a
x86
x86_64
armv4

「Android on ARMv4 (take 2) 」
http://benno.id.au/blog/2008/10/27/android-on-armv4-take2

TARGET_ARCH_VERSION=(CPU target version)