if (NOT DEFINED NDK_ROOT)
    message(FATAL_ERROR "NDK_ROOT is not defined. Please set it to the root directory of your Android NDK.")
endif ()
message(STATUS "Using Android NDK: ${NDK_ROOT}")
if (NOT DEFINED ANDROID_ABI)
    message("ANDROID_ABI is not defined. Defaulting to x86")
    set(ANDROID_ABI x86)
endif ()
set(CMAKE_TOOLCHAIN_FILE ${NDK_ROOT}/build/cmake/android.toolchain.cmake)