<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/143506>143506</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Multi-Call command line building error
        </td>
    </tr>

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

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

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

<pre>
    I'm using a multicall build of LLVM/Clang (i.e. I have a single binary symlinked to all tools) and I'm running into an issue where if a driver call gets executed out-of-process (either because it gets expanded into multiple cc1 invocations or forced via -fproc-stat-report) the argument parsing breaks.

The multicall binary calls "path/to/clang clang -cc1" (note the duplicate clang), this works for integrated (internal redirection, no execve) cc1 but breaks for out-of-process execution. It works if I invoke the compiler as "path/to/llvm clang" (not using the symlink) as then the tool name is not in the command line twice.

</pre>
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