-all_load 链接器标志有什么作用? [英] What does the -all_load linker flag do?

问题描述

在编译 Objective-C 代码时，我在任何地方都找不到 -all_load 标志的作用.

I can't find anywhere what the -all_load flag do when compiling Objective-C code.

我在将二进制文件上传到 Apple 时遇到了一些问题，他们说这是因为我没有使用这个标志，但我的代码即使没有它也能编译.

I have some issues uploading binaries to Apple, the they say it's because I didn't use this flag, but my code compiles even without it.

有人可以帮我吗?

谢谢

推荐答案

可能和这个技术说明有关 https://developer.apple.com/library/content/qa/qa1490/_index.html

It is probably related to this technical note https://developer.apple.com/library/content/qa/qa1490/_index.html

重要提示:对于 64 位和 iPhone 操作系统应用程序，存在一个链接器错误，该错误会阻止 -ObjC 从仅包含类别而不包含类的静态库加载对象文件.解决方法是使用 -all_load 或 -force_load 标志.-all_load 强制链接器从它看到的每个存档中加载所有目标文件，即使是那些没有 Objective-C 代码的文件.-force_load 在 Xcode 3.2 及更高版本中可用.它允许对存档加载进行更精细的控制.每个 -force_load 选项都必须跟一个存档路径，并且该存档中的每个目标文件都将被加载.

IMPORTANT: For 64-bit and iPhone OS applications, there is a linker bug that prevents -ObjC from loading objects files from static libraries that contain only categories and no classes. The workaround is to use the -all_load or -force_load flags. -all_load forces the linker to load all object files from every archive it sees, even those without Objective-C code. -force_load is available in Xcode 3.2 and later. It allows finer grain control of archive loading. Each -force_load option must be followed by a path to an archive, and every object file in that archive will be loaded.

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