# Android options

ANDROID_NDK=${ANDROID_NDK:-"${HOME}/android/toolchain/android-ndk"}

ANDROID_PLATFORM=${ANDROID_PLATFORM:-android-28}

function configureAndroidToolchain {

ANDROID_ARCH=$1

# Android architecture

if [ -z "${ANDROID_ARCH}" ] ; then

echo >&2 "Error: \${ANDROID_ARCH} must be set"

exit 1

fi

# Expected Android standalone toolchain directory name

case "${ANDROID_ARCH}" in

armv6|armv7)

ANDROID_STANDALONE_TOOLCHAIN_DIRNAME="standalone-arm"

;;

*)

ANDROID_STANDALONE_TOOLCHAIN_DIRNAME="standalone-${ANDROID_ARCH}"

;;

esac

# Expected Android target triple and architecture flag(s)

case "${ANDROID_ARCH}" in

armv6|armv7)

# Google recommends using Thumb instructions when targeting ARM.

ANDROID_TRIPLE=arm-linux-androideabi

if [ "${ANDROID_ARCH}" == "armv7" ] ; then

BUILD_ARCH=armv7a

else

BUILD_ARCH=armv6

fi

ANDROID_TARGET_FLAGS="-target ${ANDROID_TRIPLE} -march=${BUILD_ARCH} -mthumb"

;;

arm64)

ANDROID_TRIPLE=aarch64-linux-android

ANDROID_TARGET_FLAGS="-target ${ANDROID_TRIPLE}"

;;

x86)

ANDROID_TRIPLE=i686-linux-android

ANDROID_TARGET_FLAGS="-target ${ANDROID_TRIPLE} -march=i686"

;;

x86_64)

ANDROID_TRIPLE=x86_64-linux-android

ANDROID_TARGET_FLAGS="-target ${ANDROID_TRIPLE}"

;;

*)

ANDROID_TRIPLE=

ANDROID_TARGET_FLAGS=

;;

esac

# Has a full, custom toolchain been specified?

# AR, CC, CXX, LINK, OBJCOPY, RANLIB, STRIP

if [ ! -z "${OBJCOPY}" ] ; then

ANDROID_CC="${CC}"

ANDROID_CXX="${CXX}"

ANDROID_LINK="${LINK}"

else

# Attempt to set up the toolchain automatically

if [ -z "${ANDROID_TOOLCHAIN}" ] ; then

ANDROID_TOOLCHAIN="${HOME}/android/toolchain/${ANDROID_STANDALONE_TOOLCHAIN_DIRNAME}/bin/${ANDROID_TRIPLE}-"

# OpenSSL requires this to be set when cross-compiling for Android

export CROSS_SYSROOT="${HOME}/android/toolchain/${ANDROID_STANDALONE_TOOLCHAIN_DIRNAME}/sysroot"

else

# if not defined, derive CROSS_ROOT from ANDROID_TOOLCHAIN

if [ -z "${CROSS_SYSROOT}" ] ; then

export CROSS_SYSROOT="${ANDROID_TOOLCHAIN%/*/*}/sysroot"

fi

fi

ANDROID_CC_NAME=${ANDROID_CC_NAME:-clang}

ANDROID_CXX_NAME=${ANDROID_CXX_NAME:-clang++}

export ANDROID_CC="${ANDROID_TOOLCHAIN}${ANDROID_CC_NAME} ${ANDROID_TARGET_FLAGS}"

export ANDROID_CXX="${ANDROID_TOOLCHAIN}${ANDROID_CXX_NAME} ${ANDROID_TARGET_FLAGS}"

export ANDROID_LINK="${ANDROID_TOOLCHAIN}${ANDROID_CXX_NAME} ${ANDROID_TARGET_FLAGS}"

export ANDROID_AR="${ANDROID_TOOLCHAIN}ar"

export ANDROID_OBJCOPY="${ANDROID_TOOLCHAIN}objcopy"

export ANDROID_RANLIB="${ANDROID_TOOLCHAIN}ranlib"

export ANDROID_STRIP="${ANDROID_TOOLCHAIN}strip"

# ICU needs to know the Android triple being targeted.

export ANDROID_TRIPLE

fi

}

# Android architectures

export ARCHS="armv6 armv7 x86 x86_64"