ort-customops/prebuild

Mobile Azure EP pre-build

Manual libraries that need to be prebuilt for the Azure operators on Android and iOS. There is no simple cmake setup that works, so we prebuild as a one-off.

Requirements:

• pkg-config
• Android
  • Android SDK installed with NDK 25 or later

    • You can install a package but that means you have to use sudo for all updates like installing an NDK

      • https://stackoverflow.com/questions/34556884/how-to-install-android-sdk-on-ubuntu
      • you still need to manually add the cmdline-tools to that package as well
      • probably easier to create a per-user install using command line tools

    • Using command line tools

      • Download the command line tools from https://developer.android.com/studio
        • Download the 'Command line tools only' and unzip
      • mkdir ~/Android
      • unzip commandlinetools-linux-9477386_latest.zip
      • mkdir -p ~/Android/cmdline-tools/latest
      • mv cmdline-tools/* ~/Android/cmdline-tools/latest
      • export ANDROID_HOME=~/Android
      • Add these to PATH
        • ~/Android/cmdline-tools/latest/bin
        • ~/Android/platform-tools/bin
      • sdkmanager --list to make sure the setup works
      • Install platform-tools and latest NDK
        • sdkmanager --install platform-tools
        • e.g. sdkmanager --install ndk;25.2.9519653

      That should be enough to build. e.g. ./build_lib.sh --android --android_api=24 --android_home=/home/me/Android --android_abi=x86_64 --android_ndk_path=/home/me/Android/ndk/25.2.9519653 --enable_cxx_tests

      See Android documentation for installing a system image with sdkmanager and creating an emulator with avdmanager.

• iOS
  • TBD

Android build

Export ANDROID_NDK_ROOT with the value set to the NDK path as this is used by the build script

• e.g. export ANDROID_NDK_ROOT=~/Android/ndk/25.2.9519653 From this directory run ./build_curl_for_android.sh An architecture can optionally be specified as the first argument to limit the build to that architecture. Otherwise all 4 architectures (arm, arm64, x86, x86_64) will be built. e.g. if you just want to build locally for the emulator you can do ./build_curl_for_android.sh x86_64

Android testing

Build with --enable_cxx_tests. This should result in the 'bin' directory of the build output having the two test executables. Create/start Android emulator Use adb push to copy bin, lib and data directories from the build output to the /data/local/tmp directory - adb push build/Android/bin /data/local/tmp - repeat for 'lib' and 'data'

• copy the onnxruntime shared library to the lib dir (adjust version number as needed)
  • adjust architecture as needed (most likely x86_64 for emulator and arm)
  • adb push build/Android/Debug/_deps/onnxruntime-src/jni/x86_64/libonnxruntime.so /data/local/tmp/lib
• Connect to emulator
  • adb shell
  • cd /data/local/tmp
  • Add path to .so
    • export LD_LIBRARY_PATH=/data/local/tmp/lib:$LD_LIBRARY_PATH
  • Make tests executable
    • chmod +x bin/ocos_test
    • chmod +x bin/extensions_test
  • Run tests from tmp dir so paths to data are as expected
    • ./bin/ocos_test
    • ./bin/extensions_test