install_name_tool -change和-id之间的区别 [英] install_name_tool difference between -change and -id

问题描述

我在这个概念上苦苦挣扎了一段时间，我无法真正理解-change和-id之间的区别.手册页指出

I have been struggling with this concept for a while and I cannot really understand what the difference is between -change and -id.The man page states

 -id name
              Changes  the  shared  library identification name of a dynamic shared library to name.  If the Mach-O binary is not a dynamic
              shared library and the -id option is specified it is ignored.

-change old new
              Changes  the dependent shared library install name old to new in the specified Mach-O binary.  More than one of these options
              can be specified.  If the Mach-O binary does not contain the old install name in a specified -change  option  the  option  is
              ignored.

到目前为止，我已经尝试过-change.假设我具有以下结构

So far I have experimented with -change. Suppose I have the following structure

Test.App
|_Contents
    |_MacOS
    |   |_test -----> item A
    |_Library
        |_test_library.dylib     --->item B
        |_another_library.dylib  --->item C

现在假设我在itemB上运行了以下内容

Now suppose I ran the following on itemB

$ otool -L test_library.dylib
   test_library.dylib
   /some/path/another_library.dylib  -->item D

以上结果表明test_library.dylib现在依赖于another_library.dylib，如果我需要更改another_library.dylib的位置，我会这样做

The above result indicates that test_library.dylib depends on another_library.dylib now if I needed to change the location of another_library.dylib I would do this

install_name_tool -change /some/path/another_library.dylib some/new/path/another_library.dylib  test_library.dylib 

这将更改项目D的位置.我的问题是install-name_tool -id会做什么，何时使用它?

this would change the location of item D. My question is what does install-name_tool -id do and when do I use that ?

推荐答案

我的理解是:

-id:这将设置在与动态库链接时将使用的安装名称".它将在目标动态库文件上运行.

-id: This sets the "install name" that will be used when linking against the dynamic library. It would be run on the target dynamic library file.

-change:这将在链接后更改安装名称"，并将在与目标动态库链接的可执行或动态库上运行.

-change: This changes the "install name" after linking and would be run on the executable or dynamic library that links against the target dynamic library.

这篇关于install_name_tool -change和-id之间的区别的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！