#! /bin/sh

if [ -z "$NDK_PLATFORM" ]; then

  export NDK_PLATFORM="android-16"

fi

export NDK_PLATFORM_COMPAT="${NDK_PLATFORM_COMPAT:-${NDK_PLATFORM}}"

export NDK_API_VERSION=$(echo "$NDK_PLATFORM" | sed 's/^android-//')

export NDK_API_VERSION_COMPAT=$(echo "$NDK_PLATFORM_COMPAT" | sed 's/^android-//')

if [ -z "$ANDROID_NDK_HOME" ]; then

  echo "You should probably set ANDROID_NDK_HOME to the directory containing"

  echo "the Android NDK"

  exit

fi

if [ ! -f ./configure ]; then

  echo "Can't find ./configure. Wrong directory or haven't run autogen.sh?" >&2

  exit 1

fi

if [ "x$TARGET_ARCH" = 'x' ] || [ "x$ARCH" = 'x' ] || [ "x$HOST_COMPILER" = 'x' ]; then

  echo "You shouldn't use android-build.sh directly, use android-[arch].sh instead" >&2

  exit 1

fi

export MAKE_TOOLCHAIN="${ANDROID_NDK_HOME}/build/tools/make_standalone_toolchain.py"

export PREFIX="$(pwd)/libsodium-android-${TARGET_ARCH}"

export TOOLCHAIN_DIR="$(pwd)/android-toolchain-${TARGET_ARCH}"

export PATH="${PATH}:${TOOLCHAIN_DIR}/bin"

export CC=${CC:-"${HOST_COMPILER}-clang"}

rm -rf "${TOOLCHAIN_DIR}" "${PREFIX}"

echo

echo "Warnings related to headers being present but not usable are due to functions"

echo "that didn't exist in the specified minimum API version level."

echo "They can be safely ignored."

echo

echo

if [ "$NDK_PLATFORM" != "$NDK_PLATFORM_COMPAT" ]; then

  echo "Building for platform [${NDK_PLATFORM}], retaining compatibility with platform [${NDK_PLATFORM_COMPAT}]"

else

  echo "Building for platform [${NDK_PLATFORM}]"

fi

echo

env - PATH="$PATH" \

    "$MAKE_TOOLCHAIN" --force --api="$NDK_API_VERSION_COMPAT" \

    --arch="$ARCH" --install-dir="$TOOLCHAIN_DIR" || exit 1

if [ -z "$LIBSODIUM_FULL_BUILD" ]; then

  export LIBSODIUM_ENABLE_MINIMAL_FLAG="--enable-minimal"

else

  export LIBSODIUM_ENABLE_MINIMAL_FLAG=""

fi

./configure \

    --disable-soname-versions \

    ${LIBSODIUM_ENABLE_MINIMAL_FLAG} \

    --host="${HOST_COMPILER}" \

    --prefix="${PREFIX}" \

    --with-sysroot="${TOOLCHAIN_DIR}/sysroot" || exit 1

if [ "$NDK_PLATFORM" != "$NDK_PLATFORM_COMPAT" ]; then

  egrep '^#define ' config.log | sort -u > config-def-compat.log

  echo

  echo "Configuring again for platform [${NDK_PLATFORM}]"

  echo

  env - PATH="$PATH" \

      "$MAKE_TOOLCHAIN" --force --api="$NDK_API_VERSION" \

      --arch="$ARCH" --install-dir="$TOOLCHAIN_DIR" || exit 1

  ./configure \

      --disable-soname-versions \

      ${LIBSODIUM_ENABLE_MINIMAL_FLAG} \

      --host="${HOST_COMPILER}" \

      --prefix="${PREFIX}" \

      --with-sysroot="${TOOLCHAIN_DIR}/sysroot" || exit 1

  egrep '^#define ' config.log | sort -u > config-def.log

  if ! cmp config-def.log config-def-compat.log; then

    echo "Platform [${NDK_PLATFORM}] is not backwards-compatible with [${NDK_PLATFORM_COMPAT}]" >&2

    diff -u config-def.log config-def-compat.log >&2

    exit 1

  fi

  rm -f config-def.log config-def-compat.log

fi

NPROCESSORS=$(getconf NPROCESSORS_ONLN 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null)

PROCESSORS=${NPROCESSORS:-3}

make clean && \

make -j${PROCESSORS} install && \

echo "libsodium has been installed into ${PREFIX}"