git clone http://repo.or.cz/luajit-2.0.git

git checkout v2.1

LUAJIT=./luajit-2.1
DEVDIR=`xcode-select -print-path`/Platforms
IOSVER=iPhoneOS8.1.sdk
SIMVER=iPhoneSimulator.sdk
IOSDIR=$DEVDIR/iPhoneOS.platform/Developer
SIMDIR=$DEVDIR/iPhoneSimulator.platform/Developer
IOSBIN=$DEVDIR/../usr/bin/
SIMBIN=$SIMDIR/usr/bin/

BUILD_DIR=$LUAJIT/build

rm -rf $BUILD_DIR
mkdir -p $BUILD_DIR
rm *.a 1>/dev/null 2>/dev/null

echo =================================================
echo ARMV7 Architecture
ISDKF="-arch armv7 -isysroot $IOSDIR/SDKs/$IOSVER"
make -j -C $LUAJIT HOST_CC="gcc -m32 " CROSS=$IOSBIN TARGET_FLAGS="$ISDKF" TARGET=armv7 TARGET_SYS=iOS clean
make -j -C $LUAJIT HOST_CC="gcc -m32 " CROSS=$IOSBIN TARGET_FLAGS="$ISDKF" TARGET=armv7 TARGET_SYS=iOS 
mv $LUAJIT/src/libluajit.a $BUILD_DIR/libluajitA7.a

echo =================================================
echo ARM64 Architecture
ISDKF="-arch arm64 -isysroot $IOSDIR/SDKs/$IOSVER"
make -j -C $LUAJIT HOST_CC="gcc " CROSS=$IOSBIN TARGET_FLAGS="$ISDKF" TARGET=arm64 TARGET_SYS=iOS clean
make -j -C $LUAJIT HOST_CC="gcc " CROSS=$IOSBIN TARGET_FLAGS="$ISDKF" TARGET=arm64 TARGET_SYS=iOS 
mv $LUAJIT/src/libluajit.a $BUILD_DIR/libluajit64bit.a

echo =================================================
echo IOS Simulator Architecture
ISDKF="-arch x86_64 -isysroot $SIMDIR/SDKs/$SIMVER -miphoneos-version-min=7.0"
make -j -C $LUAJIT HOST_CFLAGS="-arch x86_64" HOST_LDFLAGS="-arch x86_64" TARGET_SYS=iOS TARGET=x86_64 clean
make -j -C $LUAJIT HOST_CFLAGS="-arch x86_64" HOST_LDFLAGS="-arch x86_64" TARGET_SYS=iOS TARGET=x86_64 amalg CROSS=$SIMBIN TARGET_FLAGS="$ISDKF"


mv $LUAJIT/src/libluajit.a $BUILD_DIR/libluajitx86_64.a

libtool -o $BUILD_DIR/libluajit21.a $BUILD_DIR/*.a 2> /dev/null


mkdir -p $BUILD_DIR/Headers
cp $LUAJIT/src/lua.h $BUILD_DIR/Headers
cp $LUAJIT/src/lauxlib.h $BUILD_DIR/Headers
cp $LUAJIT/src/lualib.h $BUILD_DIR/Headers
cp $LUAJIT/src/luajit.h $BUILD_DIR/Headers
cp $LUAJIT/src/lua.hpp $BUILD_DIR/Headers
cp $LUAJIT/src/luaconf.h $BUILD_DIR/Headers

mv $BUILD_DIR/libluajit21.a ../lib/ios

由于iphone5s以上虚拟机需要x86_64支持，luajit为了支持此模式需要在other linker flags中增加参数

-pagezero_size 10000 -image_base 100000000

1: 目前luajit 2.1只是alpha版本，有没有大的bug不清楚

2:在arm64平台下的luajit的bytecode与早前的bytecode有区别无法直接在mac下编译后在arm64平台使用。它使用了最新的lj_gc64与lj_fr2。所以直接在macos下编译的lua代码不能在ios上运行。需要上传源代码在ios下编译