How to compile the flex delegate c library for android

[CaptainDario]

I am trying to compile the flex delegate c-library for android without success.
I tried various commands such as

bazelisk build -c opt --repo_env=HERMETIC_PYTHON_VERSION=3.11 --fat_apk_cpu=arm64-v8a //tensorflow/lite/delegates/flex:tensorflowlite_flex

bazelisk build -c opt --config=android_arm64  tensorflow/lite/delegates/flex:tensorflowlite_flex 

bazelisk build -c opt --config=android_arm --config=monolithic --define=TENSORFLOW_PROTOS=lite --verbose_failures //tensorflow/lite/delegates/flex:tensorflowlite_flex 

bazelisk build -c opt --config=android_arm64 --config=monolithic --define=tflite_convert_with_select_tf_ops=true --define=with_select_tf_ops=true //tensorflow/lite/delegates/flex:libtensorflowlite_flex.so

bazel build --config=android_arm64 \
    --cxxopt="-D__ANDROID__" \
    --copt="-DANDROID" \
    --copt="-D__ANDROID_API__=21" \
    --linkopt="-fuse-ld=lld" \
    --verbose_failures \
    //tensorflow/lite/delegates/flex:libtensorflowlite_flex.so \
    --monolithic

But all of them lead to

lite_rt_for_flutter_libs/tensorflow/tensorflow/lite/delegates/flex/BUILD:128:27: Linking tensorflow/lite/delegates/flex/libtensorflowlite_flex.so failed: (Exit 1): clang failed: error executing command (from target //tensorflow/lite/delegates/flex:libtensorflowlite_flex.so) external/androidndk/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang @bazel-out/arm64-v8a-opt/bin/tensorflow/lite/delegates/flex/libtensorflowlite_flex.so-2.params
ld.lld: error: unknown argument '-framework'
ld.lld: error: cannot open CoreFoundation: No such file or directory
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Target //tensorflow/lite/delegates/flex:libtensorflowlite_flex.so failed to build
Use --verbose_failures to see the command lines of failed build steps.
INFO: Elapsed time: 853.521s, Critical Path: 176.99s
INFO: 2555 processes: 148 internal, 2407 local.
FAILED: Build did NOT complete successfully

I am trying to build on macos with m1 processor

Bazel version: 6.5.0
python version: 3.11

[gaikwadrahul8]

Hi, @CaptainDario
I apologize for the delayed response, If possible could you please help me with complete steps which you followed before encountering the mentioned error message and on which OS you're trying ?

I believe you are referencing the Build LiteRT for Android official documentation specifically the Set Up Build Environment without Docker section.

Thank you for your cooperation and understanding.

[CaptainDario]

Thank you for your response!

Yes, I setup my build setup following the Build LiteRT for Android without docker.
Then I tried building the c share library (not Java), which resulted in the above error.