How to cross build md5 exsample for android?

[zuowanbushiwo]

After reading some documents ，I try cross-compile packages for Android platform: Using toolchain from Android NDK

I used my own /opt/toolchains/android-aarch64.cmake :

set(ANDROID_ABI arm64-v8a)
set(CMAKE_SIZEOF_VOID_P 8)

set(CMAKE_LIBRARY_ARCHITECTURE "aarch64-linux-android")
set(CMAKE_C_LIBRARY_ARCHITECTURE ${CMAKE_LIBRARY_ARCHITECTURE})
set(CMAKE_CXX_LIBRARY_ARCHITECTURE ${CMAKE_LIBRARY_ARCHITECTURE})

if(NOT DEFINED ANDROID_NDK)
    set(ANDROID_NDK "$ENV{ANDROID_NDK_ROOT}")
endif()
if(NOT DEFINED ANDROID_NATIVE_API_LEVEL)
    set(ANDROID_NATIVE_API_LEVEL $ENV{ANDROID_PLATFORM})
endif()
if(NOT DEFINED ANDROID_STL)
    set(ANDROID_STL "c++_shared")
endif()
if(NOT DEFINED ANDROID_LD)
    set(ANDROID_LD lld)
endif()

include(${ANDROID_NDK}/build/cmake/android.toolchain.cmake)

And wirte a conan profile local_android-ndk-arm64-v8a.txt ：

[settings]
arch=armv8
build_type=Release
compiler=clang
compiler.libcxx=c++_static
compiler.version=11
os=Android
os.api_level=25
[build_requires]
[options]
[env]
CONAN_CMAKE_TOOLCHAIN_FILE=/opt/toolchains/android-aarch64.cmake

then
first mkdir build && cd build
second， conan install --profile:host local_android-ndk-arm64-v8a.txt --build outdated --profile:build default ..
the step it seems is successful ,as:

third: cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE=/opt/toolchains/android-aarch64.cmake

this step have a  error output:
-- Conan: Adjusting output directories
-- Conan: Using cmake global configuration
-- Conan: Adjusting default RPATHs Conan policies
-- Conan: Adjusting language standard
-- Current conanbuildinfo.cmake directory: /home/packager/examples/libraries/poco/md5/build
CMake Error at build/conanbuildinfo.cmake:1369 (message):
  Incorrect 'clang', is not the one detected by CMake: 'GNU'
Call Stack (most recent call first):
  build/conanbuildinfo.cmake:930 (conan_check_compiler)
  CMakeLists.txt:19 (conan_basic_setup)

Which step I did wrong?

Thanks!