build-android.sh

#!/bin/bash
set -e

# Output directory
OUTPUT_DIR="$(pwd)/libs/android"
rm -rf "$OUTPUT_DIR"

core_count=$(getconf _NPROCESSORS_ONLN)

# Make sure ANDROID_NDK_HOME is set
if [ -z "$ANDROID_NDK_HOME" ]; then
  echo "Please export ANDROID_NDK_HOME=/path/to/ndk/29.0.0"
  exit 1
fi
echo $ANDROID_NDK_HOME

TOOLCHAIN_FILE="$ANDROID_NDK_HOME/build/cmake/android.toolchain.cmake"

for arch in x86 x86_64 armeabi-v7a arm64-v8a; do
  mkdir -p "$OUTPUT_DIR/$arch"
  pushd "$OUTPUT_DIR/$arch" >/dev/null

  # API level: arm64 needs >=21, others >=19
  api=19
  if [ "$arch" = "arm64-v8a" ]; then
    api=21
  fi

  cmake \
    -DCMAKE_BUILD_TYPE=MinSizeRel \
    -DCMAKE_TOOLCHAIN_FILE="$TOOLCHAIN_FILE" \
    -DANDROID_ABI="$arch" \
    -DANDROID_PLATFORM=android-$api \
    ../../..

  make -j $((core_count + 1))
  popd >/dev/null
done