下載之後得到lame-build.sh拷貝到文件夾/Users/8wm/Desktop/lame
3.用bbedit或者其他編輯器打開這個腳本，按照註釋修改
4.打開Terminals，
輸入
cd /Users/8wm/Desktop/lame
chmod 777 lame-build.sh
sudo -s#
輸入系統密碼
./lame-build.sh
開始編譯，編譯完成之後。生成fat-lame目錄和thin-lame目錄，分別存放合並所有指令集的靜態庫，以及各指令集的靜態庫.
根據所需，copy lame.h和libmp3lame.a文件到project裏，就可以正常使用了。
可以使用命令行，查看換個庫支持的指令集。
lipo -info libmp3lame.a
Architectures in the fat file: libmp3lame.a are: armv7 armv7s i386 x86_64 arm64
以下是build的腳本，請註意黃色的字和註釋。
#!/bin/sh
make distclean
CONFIGURE_FLAGS="--disable-shared --disable-frontend"
ARCHS="arm64 armv7s x86_64 i386 armv7"
# directories
# SOURCE是下載lame源碼包，解壓後的目錄，可以把sh腳本放到這個目錄，source改為""
SOURCE=""
# FAT是所有指令集build後，輸出的目錄，所有靜態庫被合並成壹個靜態庫
FAT="fat-lame"
# SCRATCH是下載lame源碼包，解壓後的目錄，必須是絕對路徑
SCRATCH="/Users/8wm/Desktop/lame"
# must be an absolute path
# THIN 各自指令集build後輸出的靜態庫所在的目錄，每個指令集為壹個靜態庫
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