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#!/bin/bash
#
# setup_toolchain.sh: Sets toolchain environment variables used by other scripts.
# Fail-fast if anything in the script fails.
set -e
# check that the preconditions for this script are met
if [ $(type -t verbose) != 'function' ]; then
echo "ERROR: The verbose function is expected to be defined"
return 1
fi
if [ $(type -t exportVar) != 'function' ]; then
echo "ERROR: The exportVar function is expected to be defined"
return 1
fi
if [ $(type -t absPath) != 'function' ]; then
echo "ERROR: The absPath function is expected to be defined"
return 1
fi
if [ -z "$SCRIPT_DIR" ]; then
echo "ERROR: The SCRIPT_DIR variable is expected to be defined"
return 1
fi
function default_toolchain() {
API_LEVEL=14
NDK_REV=${NDK_REV-8e}
ANDROID_ARCH=${ANDROID_ARCH-arm}
TOOLCHAIN_DIR=${SCRIPT_DIR}/../toolchains
if [ $(uname) == "Darwin" ]; then
verbose "Using Mac toolchain."
TOOLCHAIN_TYPE=ndk-r$NDK_REV-$ANDROID_ARCH-mac_v$API_LEVEL
else
verbose "Using Linux toolchain."
TOOLCHAIN_TYPE=ndk-r$NDK_REV-$ANDROID_ARCH-linux_v$API_LEVEL
fi
exportVar ANDROID_TOOLCHAIN "${TOOLCHAIN_DIR}/${TOOLCHAIN_TYPE}/bin"
# if the toolchain doesn't exist on your machine then we need to fetch it
if [ ! -d "$ANDROID_TOOLCHAIN" ]; then
mkdir -p $TOOLCHAIN_DIR
# enter the toolchain directory then download, unpack, and remove the tarball
pushd $TOOLCHAIN_DIR
TARBALL=ndk-r$NDK_REV-v$API_LEVEL.tgz
${SCRIPT_DIR}/download_toolchains.py \
http://chromium-skia-gm.commondatastorage.googleapis.com/android-toolchains/$TARBALL \
$TOOLCHAIN_DIR/$TARBALL
tar -xzf $TARBALL $TOOLCHAIN_TYPE
rm $TARBALL
popd
fi
verbose "Targeting NDK API $API_LEVEL for use on Android 4.0 (NDK Revision $NDK_REV) and above"
}
#check to see if the toolchain has been defined and if not setup the default toolchain
if [ -z "$ANDROID_TOOLCHAIN" ]; then
default_toolchain
if [ ! -d "$ANDROID_TOOLCHAIN" ]; then
echo "ERROR: unable to download/setup the required toolchain (${ANDROID_TOOLCHAIN})"
return 1;
fi
fi
GCC=$(command ls $ANDROID_TOOLCHAIN/*-gcc | head -n1)
if [ -z "$GCC" ]; then
echo "ERROR: Could not find Android cross-compiler in: $ANDROID_TOOLCHAIN"
return 1
fi
# Remove the '-gcc' at the end to get the full toolchain prefix
ANDROID_TOOLCHAIN_PREFIX=${GCC%%-gcc}
CCACHE=${ANDROID_MAKE_CCACHE-$(which ccache || true)}
exportVar CC "$CCACHE $ANDROID_TOOLCHAIN_PREFIX-gcc"
exportVar CXX "$CCACHE $ANDROID_TOOLCHAIN_PREFIX-g++"
exportVar LINK "$CCACHE $ANDROID_TOOLCHAIN_PREFIX-gcc"
exportVar AR "$ANDROID_TOOLCHAIN_PREFIX-ar"
exportVar RANLIB "$ANDROID_TOOLCHAIN_PREFIX-ranlib"
exportVar OBJCOPY "$ANDROID_TOOLCHAIN_PREFIX-objcopy"
exportVar STRIP "$ANDROID_TOOLCHAIN_PREFIX-strip"
# Create symlinks for nm & readelf and add them to the path so that the ninja
# build uses them instead of attempting to use the one on the system.
# This is required to build using ninja on a Mac.
ln -sf $ANDROID_TOOLCHAIN_PREFIX-nm $ANDROID_TOOLCHAIN/nm
ln -sf $ANDROID_TOOLCHAIN_PREFIX-readelf $ANDROID_TOOLCHAIN/readelf
exportVar PATH $ANDROID_TOOLCHAIN:$PATH
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