# How to build libs by your self.

We use the following commit for demonstration
```
commit 62ee0c8110882c6153921c87e36774273fe0a75e (HEAD -> main, github/main)
Author: Jian Chen <cjian@microsoft.com>
Date:   Wed Feb 22 19:42:36 2023 -0800
```

The build commands are:

```bash
#!/usr/bin/env bash

export ANDROID_HOME=/Users/fangjun/software/my-android
# ANDROID_HOME: Path to android sdk.
# In this directory, you can find other directories like:
#
#  emulator, platform-tools
#
export ANDROID_NDK_HOME=/Users/fangjun/software/my-android/ndk/22.1.7171670/
# ANDROID_NDK_HOME: Path to android NDK
# In this directory, you can find the file:
#    build/cmake/android.toolchain.cmake

num_jobs=3

# Get directory this script is in
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

abi=arm64-v8a
# abi=armeabi-v7a
# abi=x86_64

build_dir=$DIR/build/android-$abi

#requires python3.6 or higher
python3 \
  $DIR/tools/ci_build/build.py \
  --build_dir $build_dir \
  --config Release \
  --cmake_extra_defines onnxruntime_BUILD_UNIT_TESTS=OFF \
  --cmake_extra_defines CMAKE_INSTALL_PREFIX=$build_dir/install/ \
  --target install \
  --parallel $num_jobs \
  --skip_tests \
  --build_shared_lib \
  --android \
  --android_abi $abi \
  --android_api 21
```