build_native_ext_for_android.sh

#!/bin/sh
# Copyright 2018 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Helper script to crosscompile grpc_csharp_ext native extension for Android.

set -ex

cd "$(dirname "$0")/../../../cmake"

mkdir -p build
cd build

# set to the location where Android SDK is installed
# e.g. ANDROID_SDK_PATH="$HOME/Android/Sdk"

# set to location where Android NDK is installed, usually a subfolder of Android SDK
# to install the Android NKD, use the "sdkmanager" tool
# e.g. ANDROID_NDK_PATH=${ANDROID_SDK_PATH}/ndk-bundle

# set to location of the cmake executable from the Android SDK
# to install cmake, use the "sdkmanager" tool
# e.g. ANDROID_SDK_CMAKE=${ANDROID_SDK_PATH}/cmake/3.6.4111459/bin/cmake

# ANDROID_ABI in ('arm64-v8a', 'armeabi-v7a')
# e.g. ANDROID_ABI=armeabi-v7a

# android-21 corresponds to Lollipop 5.0
${ANDROID_SDK_CMAKE} ../.. \
  -DCMAKE_TOOLCHAIN_FILE="${ANDROID_NDK_PATH}/build/cmake/android.toolchain.cmake" \
  -DCMAKE_ANDROID_NDK="${ANDROID_NDK_PATH}" \
  -DCMAKE_ANDROID_STL_TYPE=c++_static \
  -DRUN_HAVE_POSIX_REGEX=0 \
  -DRUN_HAVE_STD_REGEX=0 \
  -DRUN_HAVE_STEADY_CLOCK=0 \
  -DCMAKE_BUILD_TYPE=Release \
  -DANDROID_PLATFORM=android-21 \
  -DANDROID_ABI="${ANDROID_ABI}" \
  -DANDROID_NDK="${ANDROID_NDK_PATH}" \
  -DgRPC_XDS_USER_AGENT_IS_CSHARP=ON

# Use externally provided env to determine build parallelism, otherwise use default.
GRPC_CSHARP_BUILD_EXT_COMPILER_JOBS=${GRPC_CSHARP_BUILD_EXT_COMPILER_JOBS:-2}

make grpc_csharp_ext "-j${GRPC_CSHARP_BUILD_EXT_COMPILER_JOBS}"