lz4 build script for iOS (armv7, armv7s, arm64), iOS Simulator (i386, x86_64)

README

A shell script to build lz4 for iOS:
==> Default lz4 version: lz4-r112
==> Minimum deployment target start with 7.0
==> Works with Xcode 7 and produce bitcode enabled binaries
==> Currently builds: iOS (armv7, armv7s,arm64), iOS Simulator (i386, x86_64)

build-lz4-for-iOS.sh

#!/bin/bash
# By i36.lib@gmail.com
# Blog: http://i36.Me/

set -e

# LZ4 Version
#=================================
LZ4_VERSION="lz4-r112"

# SDK Version
#=================================
SDK_VERSION=$(xcodebuild -version -sdk iphoneos | grep SDKVersion | cut -f2 -d ':' | tr -d '[[:space:]]')

# Minimum iOS deployment target version
#=================================
MIN_IOS_VERSION="7.0"

echo "========================================"
echo "LZ4 version: ${LZ4_VERSION}"
echo "iOS SDK version: ${SDK_VERSION}"
echo "iOS deployment target: ${MIN_IOS_VERSION}"
echo "========================================"

AR=ar
RANLIB=ranlib
DEVELOPER=`xcode-select -print-path`

buildIOS()
{
	ARCH=$1
	mkdir -p /tmp/${LZ4_VERSION}/iOS/${ARCH}
	OUTPT=/tmp/${LZ4_VERSION}/iOS/${ARCH}
	
	pushd . > /dev/null
	cd "${LZ4_VERSION}"
  
	if [[ "${ARCH}" == "i386" || "${ARCH}" == "x86_64" ]]; then
		PLATFORM="iPhoneSimulator"
	else
		PLATFORM="iPhoneOS"
	fi

	echo "Start Building ${LZ4_VERSION} for ${PLATFORM} ${SDK_VERSION} ${ARCH} ..."
  
	export $PLATFORM
	export CROSS_TOP="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer"
	export CROSS_SDK="${PLATFORM}${SDK_VERSION}.sdk"
	export BUILD_TOOLS="${DEVELOPER}"
	export CC="${BUILD_TOOLS}/usr/bin/gcc -fembed-bitcode -isysroot ${CROSS_TOP}/SDKs/${CROSS_SDK} -mios-version-min=${MIN_IOS_VERSION} -O3 -arch ${ARCH}"
	
	$CC -c lz4.c -o $OUTPT/lz4.o >> "/tmp/${LZ4_VERSION}/iOS/${ARCH}_lz4.log" 2>&1
	$CC -c lz4hc.c -o $OUTPT/lz4hc.o >> "/tmp/${LZ4_VERSION}/iOS/${ARCH}_lz4hc.log" 2>&1
	$AR rc $OUTPT/liblz4.a $OUTPT/lz4.o $OUTPT/lz4hc.o
	$RANLIB $OUTPT/liblz4.a
	popd > /dev/null
	
	echo "Done Building ${LZ4_VERSION} for ${ARCH}!"
}

## Start building ...
################################################

#echo "Cleaning up ..."
rm -rf build/
rm -rf ${LZ4_VERSION}
rm -rf /tmp/${LZ4_VERSION}

mkdir -p build/src
mkdir -p build/lz4/lib
mkdir -p build/lz4/include/

if [ ! -e ${LZ4_VERSION}.tar.gz ]; then
	echo "Downloading ${LZ4_VERSION}.tar.gz"
	curl -O https://lz4.googlecode.com/files/${LZ4_VERSION}.tar.gz
else
	echo "Using ${LZ4_VERSION}.tar.gz"
fi

echo "Unpacking ${LZ4_VERSION}.tar.gz ..."
tar xfz "${LZ4_VERSION}.tar.gz"

cp -R ${LZ4_VERSION}/* build/src/

buildIOS "armv7"
buildIOS "armv7s"
buildIOS "arm64"
buildIOS "x86_64"
buildIOS "i386"

echo "Building iOS libraries ..."
lipo \
	"/tmp/${LZ4_VERSION}/iOS/armv7/liblz4.a" \
	"/tmp/${LZ4_VERSION}/iOS/arm64/liblz4.a" \
	"/tmp/${LZ4_VERSION}/iOS/i386/liblz4.a" \
	"/tmp/${LZ4_VERSION}/iOS/x86_64/liblz4.a" \
	-create -output build/lz4/lib/liblz4.a
cp build/src/lz4.h build/lz4/include/
cp build/src/lz4hc.h build/lz4/include/

echo "Cleaning up ..."
rm -rf ${LZ4_VERSION}
rm -rf /tmp/${LZ4_VERSION}

echo "Done!"