BuildGuideAndroidNDK.md

   1 # How to use the Android NDK to build ArmNN
   2
   3 *  [Introduction](#introduction)
   4 *  [Download the Android NDK and make a standalone toolchain](#downloadNDK)
   5 *  [Build the Boost C++ libraries](#buildBoost)
   6 *  [Build the Compute Library](#buildCL)
   7 *  [Build Google's Protobuf library](#buildProtobuf)
   8 *  [Download TensorFlow](#downloadTF)
   9 *  [Build ArmNN](#buildArmNN)
  10 *  [Run ArmNN UnitTests on an Android device](#runArmNNUnitTests)
  11
  12
  13 #### <a name="introduction">Introduction</a>
  14 These are step by step instructions for using the Android NDK to build ArmNN.
  15 They have been tested on a clean install of Ubuntu 18.04, and should also work with other OS versions.
  16 The instructions show how to build the ArmNN core library and the optional TensorFlow parser.
  17 All downloaded or generated files will be saved inside the `~/armnn-devenv` directory.
  18
  19 #### <a name="downloadNDK">Download the Android NDK and make a standalone toolchain</a>
  20
  21 * Download the Android NDK from [the official website](https://developer.android.com/ndk/downloads/index.html):
  22
  23      ```bash
  24      mkdir -p ~/armnn-devenv/toolchains
  25      cd ~/armnn-devenv/toolchains
  26      # For Mac OS, change the NDK download link accordingly.
  27      wget https://dl.google.com/android/repository/android-ndk-r17b-linux-x86_64.zip
  28      unzip android-ndk-r17b-linux-x86_64.zip
  29      export NDK=~/armnn-devenv/toolchains/android-ndk-r17b
  30      ```
  31
  32          You may want to append `export NDK=~/armnn-devenv/toolchains/android-ndk-r17b` to your `~/.bashrc` (or `~/.bash_profile` in Mac OS).
  33
  34 * Make a standalone toolchain:
  35
  36          (Requires python if not previously installed: `sudo apt install python`)
  37
  38    ```bash
  39    # Create an arm64 API 26 libc++ toolchain.
  40    $NDK/build/tools/make_standalone_toolchain.py \
  41        --arch arm64 \
  42        --api 26 \
  43        --stl=libc++ \
  44        --install-dir=$HOME/armnn-devenv/toolchains/aarch64-android-r17b
  45    export PATH=$HOME/armnn-devenv/toolchains/aarch64-android-r17b/bin:$PATH
  46    ```
  47
  48          You may want to append `export PATH=$HOME/armnn-devenv/toolchains/aarch64-android-r17b/bin:$PATH` to your `~/.bashrc` (or `~/.bash_profile` in Mac OS).
  49
  50 #### <a name="buildBoost">Build the Boost C++ libraries</a>
  51
  52 * Download Boost version 1.64:
  53
  54    ```bash
  55    mkdir ~/armnn-devenv/boost
  56    cd ~/armnn-devenv/boost
  57    wget https://dl.bintray.com/boostorg/release/1.64.0/source/boost_1_64_0.tar.bz2
  58    tar xvf boost_1_64_0.tar.bz2
  59    ```
  60
  61 * Build:
  62
  63         (Requires gcc if not previously installed: `sudo apt install gcc`)
  64         ```bash
  65         echo "using gcc : arm : aarch64-linux-android-clang++ ;" > $HOME/armnn-devenv/boost/user-config.jam
  66         cd ~/armnn-devenv/boost/boost_1_64_0
  67         ./bootstrap.sh --prefix=$HOME/armnn-devenv/boost/install
  68         ./b2 install --user-config=$HOME/armnn-devenv/boost/user-config.jam \
  69      toolset=gcc-arm link=static cxxflags=-fPIC --with-filesystem \
  70          --with-test --with-log --with-program_options -j16
  71     ```
  72
  73 #### <a name="buildCL">Build the Compute Library</a>
  74 * Clone the Compute Library:
  75
  76         (Requires Git if not previously installed: `sudo apt install git`)
  77
  78         ``` bash
  79         cd ~/armnn-devenv
  80         git clone https://github.com/ARM-software/ComputeLibrary.git
  81         ```
  82
  83 * Build:
  84
  85         (Requires SCons if not previously installed: `sudo apt install scons`)
  86         ```bash
  87         cd ComputeLibrary
  88         scons arch=arm64-v8a neon=1 opencl=1 embed_kernels=1 extra_cxx_flags="-fPIC" \
  89          benchmark_tests=0 validation_tests=0 os=android -j16
  90         ```
  91
  92 #### <a name="buildProtobuf">Build Google's Protobuf library</a>
  93
  94 * Clone protobuf:
  95         ```bash
  96         mkdir ~/armnn-devenv/google
  97         cd ~/armnn-devenv/google
  98         git clone https://github.com/google/protobuf.git
  99         cd protobuf
 100         git checkout -b v3.5.2 v3.5.2
 101         ```
 102
 103 * Build a native (x86) version of the protobuf libraries and compiler (protoc):
 104
 105         (Requires cUrl, autoconf, llibtool, and other build dependencies if not previously installed: `sudo apt install curl autoconf libtool build-essential g++`)
 106
 107         ```bash
 108         ./autogen.sh
 109         mkdir x86_build
 110         cd x86_build
 111         ../configure --prefix=$HOME/armnn-devenv/google/x86_pb_install
 112         make install -j16
 113         cd ..
 114         ```
 115
 116 * Build the arm64 version of the protobuf libraries:
 117
 118    ```bash
 119         mkdir arm64_build
 120         cd arm64_build
 121         CC=aarch64-linux-android-clang \
 122           CXX=aarch64-linux-android-clang++ \
 123           CFLAGS="-fPIE -fPIC" LDFLAGS="-pie -llog" \
 124        ../configure --host=aarch64-linux-android \
 125        --prefix=$HOME/armnn-devenv/google/arm64_pb_install \
 126        --with-protoc=$HOME/armnn-devenv/google/x86_pb_install/bin/protoc
 127         make install -j16
 128         cd ..
 129         ```
 130
 131 #### <a name="downloadTF">Download TensorFlow</a>
 132 * Clone TensorFlow source code:
 133
 134         ```bash
 135         cd ~/armnn-devenv/google/
 136         git clone https://github.com/tensorflow/tensorflow.git
 137         cd tensorflow/
 138         git checkout a0043f9262dc1b0e7dc4bdf3a7f0ef0bebc4891e
 139         ```
 140
 141         You need tensorflow/contrib/makefile/tf_proto_files.txt from TensorFlow to generate TensorFlow protobuf definitions. This file is not available in TensorFlow master branch.
 142
 143 #### <a name="buildArmNN">Build ArmNN</a>
 144
 145 * Clone ArmNN source code:
 146
 147         ```bash
 148         cd ~/armnn-devenv/
 149         git clone https://github.com/ARM-software/armnn.git
 150         ```
 151
 152 * Generate TensorFlow protobuf definitions:
 153
 154         ```bash
 155         cd ~/armnn-devenv/google/tensorflow
 156         ~/armnn-devenv/armnn/scripts/generate_tensorflow_protobuf.sh \
 157          $HOME/armnn-devenv/google/tf_pb $HOME/armnn-devenv/google/x86_pb_install
 158         ```
 159
 160  * Build ArmNN:
 161
 162         (Requires CMake if not previously installed: `sudo apt install cmake`)
 163
 164         ```bash
 165         mkdir ~/armnn-devenv/armnn/build
 166         cd ~/armnn-devenv/armnn/build
 167         CXX=aarch64-linux-android-clang++ \
 168          CC=aarch64-linux-android-clang \
 169          CXX_FLAGS="-fPIE -fPIC" \
 170          cmake .. \
 171       -DCMAKE_SYSTEM_NAME=Android \
 172       -DCMAKE_ANDROID_ARCH_ABI=arm64-v8a \
 173       -DCMAKE_ANDROID_STANDALONE_TOOLCHAIN=$HOME/armnn-devenv/toolchains/aarch64-android-r17b/ \
 174       -DCMAKE_EXE_LINKER_FLAGS="-pie -llog" \
 175       -DARMCOMPUTE_ROOT=$HOME/armnn-devenv/ComputeLibrary/ \
 176       -DARMCOMPUTE_BUILD_DIR=$HOME/armnn-devenv/ComputeLibrary/build \
 177       -DBOOST_ROOT=$HOME/armnn-devenv/boost/install/ \
 178       -DARMCOMPUTENEON=1 -DARMCOMPUTECL=1 -DARMNNREF=1 \
 179       -DTF_GENERATED_SOURCES=$HOME/armnn-devenv/google/tf_pb/ -DBUILD_TF_PARSER=1 \
 180       -DPROTOBUF_ROOT=$HOME/armnn-devenv/google/arm64_pb_install/
 181         make -j16
 182         ```
 183
 184 #### <a name="runArmNNUnitTests">Run the ArmNN unit tests on an Android device</a>
 185
 186
 187 * Push the build results to an Android device and make symbolic links for shared libraries:
 188
 189         ```bash
 190         adb push libarmnnTfParser.so /data/local/tmp/
 191         adb push libarmnn.so /data/local/tmp/
 192         adb push UnitTests /data/local/tmp/
 193         adb push $NDK/sources/cxx-stl/llvm-libc++/libs/arm64-v8a/libc++_shared.so /data/local/tmp/
 194         adb push $HOME/armnn-devenv/google/arm64_pb_install/lib/libprotobuf.so /data/local/tmp/libprotobuf.so.15.0.1
 195         adb shell 'ln -s libprotobuf.so.15.0.1 /data/local/tmp/libprotobuf.so.15'
 196         adb shell 'ln -s libprotobuf.so.15.0.1 /data/local/tmp/libprotobuf.so'
 197         ```
 198
 199 * Push the files needed for the unit tests (they are a mix of files, directories and symbolic links):
 200
 201         ```bash
 202         adb shell mkdir -p /data/local/tmp/src/backends/backendsCommon/test/testSharedObject
 203         adb push -p ~/armnn-devenv/armnn/build/src/backends/backendsCommon/test/testSharedObject/* /data/local/tmp/src/backends/backendsCommon/test/testSharedObject/
 204
 205         adb shell mkdir -p /data/local/tmp/src/backends/backendsCommon/test/testDynamicBackend
 206         adb push -p ~/armnn-devenv/armnn/build/src/backends/backendsCommon/test/testDynamicBackend/* /data/local/tmp/src/backends/backendsCommon/test/testDynamicBackend/
 207
 208         adb shell mkdir -p /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath1
 209         adb push -p ~/armnn-devenv/armnn/build/src/backends/backendsCommon/test/backendsTestPath1/* /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath1/
 210
 211         adb shell mkdir -p /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath2
 212         adb push -p ~/armnn-devenv/armnn/build/src/backends/backendsCommon/test/backendsTestPath2/Arm_CpuAcc_backend.so /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath2/
 213         adb shell ln -s Arm_CpuAcc_backend.so /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath2/Arm_CpuAcc_backend.so.1
 214         adb shell ln -s Arm_CpuAcc_backend.so.1 /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath2/Arm_CpuAcc_backend.so.1.2
 215         adb shell ln -s Arm_CpuAcc_backend.so.1.2 /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath2/Arm_CpuAcc_backend.so.1.2.3
 216         adb push -p ~/armnn-devenv/armnn/build/src/backends/backendsCommon/test/backendsTestPath2/Arm_GpuAcc_backend.so /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath2/
 217         adb shell ln -s nothing /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath2/Arm_no_backend.so
 218
 219         adb shell mkdir -p /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath3
 220
 221         adb shell mkdir -p /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath5
 222         adb push -p ~/armnn-devenv/armnn/build/src/backends/backendsCommon/test/backendsTestPath5/* /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath5/
 223
 224         adb shell mkdir -p /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath6
 225         adb push -p ~/armnn-devenv/armnn/build/src/backends/backendsCommon/test/backendsTestPath6/* /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath6/
 226
 227         adb shell mkdir -p /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath7
 228
 229         adb shell mkdir -p /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath9
 230         adb push -p ~/armnn-devenv/armnn/build/src/backends/backendsCommon/test/backendsTestPath9/* /data/local/tmp/src/backends/backendsCommon/test/backendsTestPath9/
 231
 232         adb shell mkdir -p /data/local/tmp/src/backends/dynamic/reference
 233         adb push -p ~/armnn-devenv/armnn/build/src/backends/dynamic/reference/Arm_CpuRef_backend.so /data/local/tmp/src/backends/dynamic/reference/
 234         ```
 235
 236 * Run ArmNN unit tests:
 237
 238         ```bash
 239         adb shell 'LD_LIBRARY_PATH=/data/local/tmp /data/local/tmp/UnitTests'
 240         ```
 241
 242         If libarmnnUtils.a is present in `~/armnn-devenv/armnn/build/` and the unit tests run without failure then the build was successful.