编译启用了bitcode的iOS库 [英] Compiling iOS library with bitcode enabled

问题描述

我需要发布一个启用了bitcode的框架，结果很麻烦。我将项目设置中的启用Bitcode设置为YES，它可以为真实设备和模拟器进行干净的构建。

I need to release a framework with bitcode enabled which turns out as a hassle. I set 'Enable Bitcode' in the project's settings to 'YES' and it builds cleanly for both a real device and a simulator.

我想测试库，所以我将它集成到我为此目的创建的新应用程序，但现在它只为模拟器构建。当我尝试为真实设备构建时，我得到：

I wanted to test the library so I integrated it to a new app I created for this purpose but now it only build for simulators. When I try to build for a real device I get:

ld: '/path/to/Framework.framework/Company(File.o)' 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
clang: error: linker command failed with exit code 1 (use -v to see invocation)

就像我说的那样，我已经用Bitcode启用了它，所以我不确定为什么会这样。

Like I said, I had built it with Bitcode enabled so I'm not sure why this happens.

有什么想法吗？谢谢

推荐答案

AFAIK，当您使用Xcode构建应用程序时，它仅在您进行存档时包含Bitcode，原因是 - 减少编译时间只是想调试或测试应用程序/库。

AFAIK, when you build app with Xcode it includes Bitcode only when you make archive, the reason - decrease compile time when just want to debug or test the app/library.

为了确保Xcode在每次构建时发出bitcode，你可以添加 -fembed-bitcode 标志为其他C标志和其他链接器标志：

To ensure that Xcode emits bitcode at each build you can add -fembed-bitcode flag to Other C flags and Other linker flags:

此外，检查二进制文件是否包含bitcode的最简单方法是使用 otool 和 grep ：

Also, the easiest way to check if the binary contains bitcode is to use otool and grep:

otool -l binary_name | grep __LLVM

你会看到一个或多个 segname __LLVM 条目，如果有的话如果没有，则为bitcode或空输出。

you will see one or more segname __LLVM entries if it does have bitcode or empty output if does not.

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