xcode 如何使用 bitcode 选项制作胖框架？

How do i make fat framework with bitcode option?

提问by Deepak Badiger

Environment: XCode 7.0.1 Module: Objective-C Bundle Type: Framework

环境：XCode 7.0.1 模块：Objective-C 捆绑类型：框架

Hi, I am trying to create a framework to support armv7, armv7s, arm64, i386 and x86_64. I am using aggregate to make the fat library. Inside the aggregate script, i am running two xcodebuild commands 1. for armv7, armv7s and arm64 and 2. for i386 and x86_64 architectures. Also, I have set Enable Bitcode=YES and Other C Flags=-fembed-bitcode under target build settings. As a precautionary mesasure, i am adding ENABLE_BITCODE=YES and OTHER_CFLAGS="-fembed-bitcode" options to the xcodebuild command

嗨，我正在尝试创建一个框架来支持 armv7、armv7s、arm64、i386 和 x86_64。我正在使用聚合来制作胖库。在聚合脚本中，我正在运行两个 xcodebuild 命令 1. 用于 armv7、armv7s 和 arm64 以及 2. 用于 i386 和 x86_64 架构。另外，我在目标构建设置下设置了 Enable Bitcode=YES 和 Other C Flags=-fembed-bitcode 。作为预防措施，我在 xcodebuild 命令中添加了 ENABLE_BITCODE=YES 和 OTHER_CFLAGS="-fembed-bitcode" 选项

My xcode build commands are as follows -

我的 xcode 构建命令如下 -

#Build The framework Target for iPhoneOS
xcodebuild -project "${PROJECT_FILE_PATH}" -target "${AN_TARGET}" 
ONLY_ACTIVE_ARCH=NO -configuration "${CONFIGURATION}" -sdk iphoneos 
BUILD_DIR="${BUILD_DIR}" OBJROOT="${OBJROOT}" BUILD_ROOT="${BUILD_ROOT}" 
CONFIGURATION_BUILD_DIR="${IPHONE_DEVICE_BUILD_DIR}" SYMROOT="${SYMROOT}" 
ARCHS="armv7 armv7s arm64" ENABLE_BITCODE=YES OTHER_CFLAGS="-fembed-bitcode" $ACTION

#Build The framework Target for iPhoneSimulator
xcodebuild -project "${PROJECT_FILE_PATH}" -target "${AN_TARGET}" 
ONLY_ACTIVE_ARCH=NO -configuration "${CONFIGURATION}" -sdk iphonesimulator 
BUILD_DIR="${BUILD_DIR}" OBJROOT="${OBJROOT}" BUILD_ROOT="${BUILD_ROOT}" 
CONFIGURATION_BUILD_DIR="${IPHONE_SIMULATOR_BUILD_DIR}" SYMROOT="${SYMROOT}" 
ARCHS="i386 x86_64" ENABLE_BITCODE=YES OTHER_CFLAGS="-fembed-bitcode" $ACTION

after running the above two commands, i am combining these two builds to make a fat framework binary using the below command

运行上述两个命令后，我将这两个构建结合起来使用以下命令制作一个胖框架二进制文件

# create a fat Framework
lipo -create 
"${IPHONE_DEVICE_BUILD_DIR}/${PROJECT_NAME}.framework/${PROJECT_NAME}" 
"${IPHONE_SIMULATOR_BUILD_DIR}/${PROJECT_NAME}.framework/${PROJECT_NAME}" -
output "${FRAMEWORK_FOLDER}/${AN_END_USER_FRAMEWORK_NAME}"

The issue iam facing is after the lipo is created, i am unable to use it in the bitcode enabled application. After running the otool -l framework_binary | grep -LLVM, i do not see the bitcode enabled flags or __LLVM.

我面临的问题是在创建 lipo 之后，我无法在启用位码的应用程序中使用它。运行后otool -l framework_binary | grep -LLVM，我没有看到启用位码的标志或 __LLVM。

Lipo removes bitcode from the fat binary. Is there a way i can retain bitcode while running the lipo command?

Lipo 从胖二进制文件中删除位代码。有没有办法在运行 lipo 命令时保留位码？

Correction: Based on the reply from Nestor, i ran the otool command as otool -l -arch armv7 framework_binary | grep LLVMand much to my surprise, i could see the segname __LLVM clang. However when i integrate the same fat framework binary into my project, it builds fine on simulator however throws the following error while running on device - ld: 'MyBinary' does not contain bitcode. You must rebuild it with bitcode enabled (Xcode setting ENABLE_BITCODE), obtain an updated library from the vendor, or disable bitcode for this target. for architecture armv7

更正：根据 Nestor 的回复，我运行了 otool 命令，otool -l -arch armv7 framework_binary | grep LLVM令我惊讶的是，我可以看到 segname __LLVM clang。但是，当我将相同的胖框架二进制文件集成到我的项目中时，它在模拟器上构建良好，但是在设备上运行时会引发以下错误 - ld：'MyBinary' 不包含位码。您必须在启用位码的情况下重建它（Xcode 设置 ENABLE_BITCODE），从供应商处获取更新的库，或为此目标禁用位码。用于架构 armv7

回答by David Cortes

This is something weird, there are not many documentation for do this, at the end I use this command:

这很奇怪，没有很多文档可以做到这一点，最后我使用这个命令：

xcodebuild -project ${PROJECT_NAME}.xcodeproj -target ${FRAMEWORK_NAME} ONLY_ACTIVE_ARCH=NO BITCODE_GENERATION_MODE=bitcode FRAMEWORK_SEARCH_PATHS="${FRAMEWORK_SEARCH_PARTH} ${SRCROOT}/**" -sdk ${SIMULATOR_SDK} -configuration ${CONFIGURATION} clean build CONFIGURATION_BUILD_DIR=${BUILD_DIR}/${CONFIGURATION}-${SIMULATOR_SDK} 2>&1

xcodebuild -project ${PROJECT_NAME}.xcodeproj -target ${FRAMEWORK_NAME} -sdk ${DEVICE_SDK} ONLY_ACTIVE_ARCH=NO BITCODE_GENERATION_MODE=bitcode FRAMEWORK_SEARCH_PATHS="${FRAMEWORK_SEARCH_PARTH} ${SRCROOT}/**" -configuration ${CONFIGURATION} clean build CONFIGURATION_BUILD_DIR=${BUILD_DIR}/${CONFIGURATION}-${DEVICE_SDK} 2>&1

Add the BITCODE_GENERATION_MODE=bitcode flag to the xcodebuild command

将 BITCODE_GENERATION_MODE=bitcode 标志添加到 xcodebuild 命令

回答by Nestor

Happily it's just a problem with otool's reporting, not lipo; you have to add the -archparameter:

令人高兴的是，这只是otool's 报告的问题，而不是lipo; 你必须添加-arch参数：

otool -arch arm64 -l myLipoOutput.a

Source: http://www.openradar.me/radar?id=6301306440384512

来源：http: //www.openradar.me/radar?id=6301306440384512

回答by Cosmin

Try to use archive for the arm slices instead of build

尝试对手臂切片使用存档而不是构建

xcodebuild -scheme "${SCHEME}" -workspace "${WORKSPACE}" -configuration "${CONFIGURATION}" -sdk iphoneos ARCHS="arm64 armv7 armv7s" CONFIGURATION_BUILD_DIR="${CONFIGURATION_BUILD_DIR}/arm" CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO ONLY_ACTIVE_ARCH=NO archive

After that run lipo to merge the simulator and the arm ones.

之后运行 lipo 以合并模拟器和手臂。

And after that run otool -arch arm64 -l myLipoOutput.aand it should work.

在那次运行之后，otool -arch arm64 -l myLipoOutput.a它应该可以工作。

回答by silyevsk

It looks like a bug in Xcode 7.0.1 . I've had the same issue and downgrading Xcode to version 7 fixed it.

它看起来像是 Xcode 7.0.1 中的一个错误。我遇到了同样的问题，将 Xcode 降级到版本 7 修复了它。

Update:Actually it may be a bug in Xcode 7 that was fixed in 7.0.1 - this SO answersolved the issue for me.

更新：实际上，这可能是 Xcode 7 中的一个错误，该错误已在 7.0.1 中修复 -这个 SO 答案为我解决了这个问题。