<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=http://email.email.llvm.org/c/eJy1VkuP2zYQ_jXyZWDBlh9rHXTYbGAkQNscEqBHgxLHFmuKVElqHf_7zlDyys46LoqggkDTfMzjm29mVFp5Lr7VygO9AgyeYI8idA7B4d8d-gB2D7-Lqp5-Aa1lkr2AMBICX7mclBY9GBsAvyu6oAxouV6m8DnAyXZaQolQo273nYZgoRavSELAtkFZwytVLcwBSSjSZR-E1mBEg6xagMQWjUQTQKvSCXcGqRxWQZ-Bb9MdrcwRHZt2UqG2XSA_UCpzYNmuMySktT5M-Rwk69mgY8c6dsFaTWspfCNJnUeoBA0MyB7OtiNrJd0vOyM1gg-uq6LPWh0xopAsnpPZx2R2Gdez4Y1_t9amom2TbPtiTSAnPE37LaCHgP3y9WaFH7o0LmwdWXmy7ujfnSM8KuswlWeajVufCGp074_364M5t1v83DXw-rlv7PXTa7gLRD9-sKGOIUuyZ3qH83EeadVP2f9-Db9j1QVRaiYYxZQDGqNIv_2RWwziEhOhJBKQnjMIipUIRJn9Hh2TyKEWQREDW0G2ELlC7R-KIx73TJA2kvwkSApd8LVqmRnKMCdDTVqIPp4JlixnjsXTdFoSnSRoK5iQbJo17P7GOigJjSTLmeaMybWzJ8U5MHg8podyZD8ZKGnjOlM805c4W4voS8k5SWrEPqCLgA26MT2kjwn7LjdgOqi_gQbIxdHeXXQ226YpDTeEvb10NxsutHpj_V3mPBv5a1br8yOj7w3_1ZEx724y7Y6r_5on15Wz6aoaGtINlTWvaBT2_KMtdoOnAYkHYyXsyXivmvLaWE97X3x90fRGLcG9YEyZV6E7hFON5sKlFL7aBqn8UY3lSviYU5WmUMDUMmww1YwjTH8b4A92RBemf2qi6RC73XVUafmH3Hz5XygYD1QPQvOHDXgBuG-bXBQYWM8gcwIyyLbqGpKOkmtAVL3bK430763vsYzYMf2lZcYaSBKrzjHw1OE6o5pWYy8qHtOyb1U_lduD5zleDq9Zoa09UtO27gcaDG31UjZVGBv6zxpztP2AZPlVOYrHqPu2LKQRB0yvcZvIYiHzRS4moqMm7QpHxRKPk87pog6hjY2Umku2PVAT78q0sg1HT79efqats39R46e_ynv6NqHJarFa5pO6WGXz9V4u12VW5pu5nK-rvMpWuXjCKs83-WyiRYnaF8nqQ5Jl_JkTRdA8WX2c_LoFqshmGb08zGerpzTL5llePW32y4XczNcbJmsjlE5ZTmrdYeKKKLLsDp42NfNg3BTeqwPV_2gwWRhU0FjED7BtIyoQUr7_frrpCNz1-lapGpxEc4to6z83PzRX>53549</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            lld/mac add option to change install names at link time
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          rsesek
      </td>
    </tr>
</table>

<pre>
    This is a new feature request of Mach-O lld, and this feature does not exist in ld64. It would be helpful to have an option to change the install name of a dependent library directly on the linker, without needing to run a post-link `install_name_tool`. The use case is if you had a bundle structure like this:

```
Foo.app/Contents/
    MacOS/
        Foo
    Frameworks/
        libcore.dylib
    Helpers/
        Helper.app/
            Contents/
                MacOS/
                    Helper
```

Both the **Helper** and **Foo** executables need to link to **libcore.dylib**, but they are at different relative path depths to **libcore.dylib**. If you do not want to ship a binary that uses `@rpath`-based loading, one (or both) of the executables will need to change their recorded install names. This has to be done after linking, e.g.:

```
install_name_tool -change libcore.dylib @executable_path/../Frameworks/libcore.dylib Foo.app/Contents/MacOS/Foo
```

And

```
install_name_tool -change libcore.dlyb @executable_path/../../../../../Frameworks/libcore.dylib Foo.app/Contents/Helpers/Helper.app/Contents/MacOS/Helper
```

It would be much more convenient to be able to tell the linker that the install name of the dependent dylib should be recorded as a different value when linking. Something like:

```
clang -o Foo -lcore -Lpath/to/libcore -Wl,-change_install_name,libcore.dylib,@executable_path/../Frameworks/libcore.dylib Foo.app/Contents/MacOS/Foo Foo.c
```

Note that this is not the same as the documented`-dylib_file` option that exists in ld64 and is currently unimplemented in lld. The `-dylib_file` option changes where the linker looks for the dependent library, but it does not change the install name that gets recorded in the output image.


</pre>
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