CMAKE_ANDROID_STANDALONE_TOOLCHAIN
When Cross Compiling for Android with a Standalone Toolchain, this variable holds the absolute path to the root directory of the toolchain. The specified directory must contain a sysroot subdirectory.
© 2000–2020 Kitware, Inc. and Contributors
Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.17/variable/CMAKE_ANDROID_STANDALONE_TOOLCHAIN.html