原文出至 http://blog.csdn.net/vieri_ch/article/details/40650467
最近升级了系统到Mac OS X 10.10 并且更新了XCode6.1和iOS 8.1
之前app用到的libmp3lame.a静态库,也要支持64位的模拟器(x86_64)和64位的真机(arm64)指令集。需要重新编译
查阅了下资料,按照如下步骤,并做了些注释和改动
1.http://sourceforge.net/projects/lame/files/lame/3.99/ 下载lame的最新版本解压到一个文件夹里例如 lame,全路径如下/Users/8wm/Desktop/lame
2.下载build的脚本,我这里使用的是国外一个朋友的分享
https://github.com/kewlbear/lame-ios-build
下载之后得到lame-build.sh拷贝到文件夹/Users/8wm/Desktop/lame
3.用bbedit或者其他编辑器打开这个脚本,按照注释修改
4.打开Terminals,
输入
cd /Users/8wm/Desktop/lame
chmod 777 lame-build.sh
sudo -s#
输入系统密码
./lame-build.sh
开始编译,编译完成之后。生成fat-lame目录和thin-lame目录,分别存放合并所有指令集的静态库,以及各指令集的静态库.
根据所需,copy lame.h和libmp3lame.a文件到project里,就可以正常使用了。
可以使用命令行,查看换个库支持的指令集。
lipo -info libmp3lame.a
Architectures in the fat file: libmp3lame.a are: armv7 armv7s i386 x86_64 arm64
以下是build的脚本,请注意黄色的字和注释。
#!/bin/sh make distclean CONFIGURE_FLAGS="--disable-shared --disable-frontend" ARCHS="arm64 armv7s x86_64 i386 armv7" # directories # SOURCE是下载lame源码包,解压后的目录,可以把sh脚本放到这个目录,source改为"" SOURCE="" # FAT是所有指令集build后,输出的目录,所有静态库被合并成一个静态库 FAT="fat-lame" # SCRATCH是下载lame源码包,解压后的目录,必须是绝对路径 SCRATCH="/Users/8wm/Desktop/lame" # must be an absolute path # THIN 各自指令集build后输出的静态库所在的目录,每个指令集为一个静态库 THIN=`pwd`/"thin-lame" COMPILE="y" LIPO="y" if [ "$*" ] then if [ "$*" = "lipo" ] then # skip compile COMPILE= else ARCHS="$*" if [ $# -eq 1 ] then # skip lipo LIPO= fi fi fi if [ "$COMPILE" ] then CWD=`pwd` echo "$CWD/$SOURCE........." for ARCH in $ARCHS do echo "building $ARCH..." mkdir -p "$SCRATCH/$ARCH" cd "$SCRATCH/$ARCH" if [ "$ARCH" = "i386" -o "$ARCH" = "x86_64" ] then PLATFORM="iPhoneSimulator" if [ "$ARCH" = "x86_64" ] then SIMULATOR="-mios-simulator-version-min=7.0" HOST=x86_64-apple-darwin else SIMULATOR="-mios-simulator-version-min=5.0" HOST=i386-apple-darwin fi else PLATFORM="iPhoneOS" SIMULATOR= HOST=arm-apple-darwin fi XCRUN_SDK=`echo $PLATFORM | tr ‘[:upper:]‘ ‘[:lower:]‘` CC="xcrun -sdk $XCRUN_SDK clang -arch $ARCH" #AS="$CWD/$SOURCE/extras/gas-preprocessor.pl $CC" CFLAGS="-arch $ARCH $SIMULATOR" CXXFLAGS="$CFLAGS" LDFLAGS="$CFLAGS" CC=$CC $CWD/$SOURCE/configure \ $CONFIGURE_FLAGS \ --host=$HOST \ --prefix="$THIN/$ARCH" \ CC="$CC" CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" make -j3 install cd $CWD done fi if [ "$LIPO" ] then echo "building fat binaries..." mkdir -p $FAT/lib set - $ARCHS CWD=`pwd` cd $THIN/$1/lib for LIB in *.a do cd $CWD lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB done cd $CWD cp -rf $THIN/$1/include $FAT fi