iOS 编译包含 bitcode 的 opencore-amr-iOS 静态库

1. 下载 opencore-amr-iOS 源码。
2. 修改 build_ios_xcode6.sh 脚本，-fembed-bitcode-marker 为新增的内容。

3. #!/bin/sh
   
   set -xe
   
   VERSION="0.1.3"
   SDKVERSION="9.2"
   LIBSRCNAME="ios-opencore-amr"
   
   CURRENTPATH=`pwd`
   
   mkdir -p "${CURRENTPATH}/src"
   cd "${CURRENTPATH}/"
   
   DEVELOPER=`xcode-select -print-path`
   DEST="${CURRENTPATH}/lib-ios"
   mkdir -p "${DEST}"
   
   ARCHS="armv7 armv7s arm64 i386 x86_64"
   # ARCHS="armv7"
   LIBS="libopencore-amrnb.a libopencore-amrwb.a"
   
   DEVELOPER=`xcode-select -print-path`
   
   for arch in $ARCHS; do
   case $arch in
   arm*)
   
   IOSV="-miphoneos-version-min=7.0"
   if [ $arch == "arm64" ]
   then
   IOSV="-miphoneos-version-min=7.0"
   fi
   
   echo "Building for iOS $arch ****************"
   SDKROOT="$(xcrun --sdk iphoneos --show-sdk-path)"
   CC="$(xcrun --sdk iphoneos -f clang)"
   CXX="$(xcrun --sdk iphoneos -f clang++)"
   CPP="$(xcrun -sdk iphonesimulator -f clang++)"
   CFLAGS="-isysroot $SDKROOT -arch $arch $IOSV -isystem $SDKROOT/usr/include -fembed-bitcode"
   CXXFLAGS=$CFLAGS
   CPPFLAGS=$CFLAGS
   export CC CXX CFLAGS CXXFLAGS CPPFLAGS
   
   ./configure \
   --host=arm-apple-darwin \
   --prefix=$DEST \
   --disable-shared --enable-static
   ;;
   *)
   IOSV="-mios-simulator-version-min=7.0"
   echo "Building for iOS $arch*****************"
   
   SDKROOT=`xcodebuild -version -sdk iphonesimulator Path`
   CC="$(xcrun -sdk iphoneos -f clang)"
   CXX="$(xcrun -sdk iphonesimulator -f clang++)"
   CPP="$(xcrun -sdk iphonesimulator -f clang++)"
   CFLAGS="-isysroot $SDKROOT -arch $arch $IOSV -isystem $SDKROOT/usr/include -fembed-bitcode"
   CXXFLAGS=$CFLAGS
   CPPFLAGS=$CFLAGS
   export CC CXX CFLAGS CXXFLAGS CPPFLAGS
   ./configure \
   --prefix=$DEST \
   --disable-shared
   ;;
   esac
   make > /dev/null
   make install
   make clean
   for i in $LIBS; do
   mv $DEST/lib/$i $DEST/lib/$i.$arch
   done
   done
   
   for i in $LIBS; do
   input=""
   for arch in $ARCHS; do
   input="$input $DEST/lib/$i.$arch"
   done
   lipo -create -output $DEST/lib/$i $input
   done

   
   
   
4. 经过测试发现，如果使用 -fembed-bitcode-marker 这一编译参数编译的话在 Archive 的时候回遇到如下错误：

所以正确的编译方式是添加 -fembed-bitcode 选项进行编译。

参考链接：

How do I xcodebuild a static library with bitcode enabled ?

Xcode 7 release notes