如何實現protobuf在XCODE上armv7/armv7s/i386的交叉編譯

折騰了4天，終于在xcode上完成protobuf2.5.0的交叉編譯，希望與我遇到相同問題的同學不在糾結。分享如下：

步驟一：部署protoc.exe

1）sudo su             ---進入管理模式

//以下操作切換至protobuf文件夾下

2）./configure

3)make

4)make check

5)make install

此時可以查看protobuf文件夾下面的makefile文件，可以查看-build表示的本機環境以及-host表示的編譯庫的運行環境

我本地的-build=x86_64-apple-darwin12.3.0  

-host=x86_64-apple-darwin12.3.0

（這兩個參數在后續配置腳本需要用到，與后面腳步的i686-apple-darwin12.3.0以及arm-apple-darwin12.3.0后綴“arm-apple-darwin12.3.0”保持一致）

6）make distclean清理已生成的makefile，為交叉編譯配置新makefile做準備

步驟二：配置交叉編譯

1）執行腳本ios-build.sh，腳本內容如下：

configure_for_platform() {

export PLATFORM=$1

#export PLATFORM=iPhoneOS

echo "Platform is ${PLATFORM}"

if [ "$PLATFORM" == "iPhoneSimulator" ]; then

export ARCHITECTURE=i386

export ARCH=i686-apple-darwin12.3.0

fi

if [ "$PLATFORM" == "iPhoneOS" ]; then

export ARCHITECTURE=$2

export ARCH=arm-apple-darwin12.3.0

fi

export ARCH_PREFIX=$ARCH-

export SDKVER="6.1"   #sdk版本號必須正確

export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/${PLATFORM}.platform/Developer

export SDKROOT="$DEVROOT/SDKs/${PLATFORM}$SDKVER.sdk"

export PKG_CONFIG_PATH="$SDKROOT/usr/lib/pkgconfig:$DEVROOT/usr/lib/pkgconfig"

export AS="$DEVROOT/usr/bin/as"

export ASCPP="$DEVROOT/usr/bin/as"

export AR="$DEVROOT/usr/bin/ar"

export RANLIB="$DEVROOT/usr/bin/ranlib"

#export CPP="$DEVROOT/usr/bin/c++"

#export CXXCPP="$DEVROOT/usr/bin/c++"

export CC="$DEVROOT/usr/bin/gcc"

export CXX="$DEVROOT/usr/bin/g++"

export LD="$DEVROOT/usr/bin/ld"

export STRIP="$DEVROOT/usr/bin/strip"

export LIBRARY_PATH="$SDKROOT/usr/lib"

export CPPFLAGS=""

#export CFLAGS="-arch armv7 -fmessage-length=0 -pipe -fpascal-strings -miphoneos-version-min=4.0 -isysroot=$SDKROOT -I$SDKROOT/usr/include -I$SDKROOT/usr/include/c++/4.2.1/"

export CFLAGS="-arch ${ARCHITECTURE} -fmessage-length=0 -pipe -fpascal-strings -miphoneos-version-min=4.0 -isysroot=$SDKROOT -I$SDKROOT/usr/include -I$SDKROOT/usr/include/c++/4.2.1/"

export CXXFLAGS="$CFLAGS"

#export LDFLAGS="-isysroot='$SDKROOT' -L$SDKROOT/usr/lib/system -L$SDKROOT/usr/lib/"

export LDFLAGS="-arch ${ARCHITECTURE} -isysroot='$SDKROOT' -L$SDKROOT/usr/lib/system -L$SDKROOT/usr/lib/"

./configure --host=${ARCH} --with-protoc=protoc --enable-static --disable-shared

}

mkdir ios-build

#build for iPhoneSimulator

configure_for_platform iPhoneSimulator

make clean

make

cp src/.libs/libprotobuf-lite.a ios-build/libprotobuf-lite-i386.a

#提取完整版本(i386)

cp src/.libs/libprotobuf.a ios-build/libprotobuf-i386.a

#build for iPhoneOS armv7

configure_for_platform iPhoneOS armv7

make clean

make

cp src/.libs/libprotobuf-lite.a ios-build/libprotobuf-lite-armv7.a

#提取完整版本(armv7)

cp src/.libs/libprotobuf.a ios-build/libprotobuf-armv7.a

#build for iPhoneOS armv7s

configure_for_platform iPhoneOS armv7s

make clean

make

cp src/.libs/libprotobuf-lite.a ios-build/libprotobuf-lite-armv7s.a

#提取完整版本(armv7s)

cp src/.libs/libprotobuf.a ios-build/libprotobuf-armv7s.a

make clean

#cerate a fat library containing all achitectures in libprotobuf-lite.a

xcrun -sdk iphoneos lipo -arch armv7 ios-build/libprotobuf-lite-armv7.a -arch armv7s ios-build/libprotobuf-lite-armv7s.a -arch i386 ios-build/libprotobuf-lite-i386.a -create -output ios-build/libprotobuf-lite.a

#合并三個完整版本（libprotobuf.a）

xcrun -sdk iphoneos lipo -arch armv7 ios-build/libprotobuf-armv7.a -arch armv7s ios-build/libprotobuf-armv7s.a -arch i386 ios-build/libprotobuf-i386.a -create -output ios-build/libprotobuf.a

2）將打包生成的libprotobuf-lite.a和libprotobuf.a復制至工程下進行編譯，可以編譯protobuf在xcode上的模擬器版本和真機版本，完成交叉編譯。