CMAKE_ANDROID_ARCH
When Cross Compiling for Android with NVIDIA Nsight Tegra Visual Studio Edition, this variable may be set to specify the default value for the ANDROID_ARCH target property. See that target property for additional information.
Otherwise, when Cross Compiling for Android, this variable provides the name of the Android architecture corresponding to the value of the CMAKE_ANDROID_ARCH_ABI variable. The architecture name may be one of:
armarm64mipsmips64x86x86_64
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https://cmake.org/cmake/help/v3.15/variable/CMAKE_ANDROID_ARCH.html