<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=http://email.email.llvm.org/c/eJylUsuunDAM_RrYWKBMgHksWNz2atbd3W4NMZA2JDSPO6JfX8PM9KFK3VSKwPFxTo590jm1ttlRPJZ4zcRLb9COEOel7KFQtJBVZPu1UC6CS3FJseTwXpvJCvb64lBn1Qvc0Fttxy1EP6aZbIRkUyAFKnlGoHfzog1G7exWlcnTP-6QJ8iaD8XbnaLgszNaVRhtqXjyZ83rQ8ufbdy_bxNZQPsU8VOUDuCpd6PV3zkdHXQEzhLECSMj35L2FIDJis97fxut_Ag6ws0lo7byicwyJLMdRsXUYF0kbugcaEGPkcwKzoO2TEoQcCZQGkfrQtR9Ji-cWreJBDdTnLbI6K-03am0gtUlmImVMz1L3wd1l_KXKc_8b4OrrkyTq7ZSl-qCOaY4Od_GdaGAVkdu2ufJm3aKcQnsQyavvEYdp9SVPGbeGPP-_BWLd1-oZz-uOoREgYNGni-nfGqFvJyEOMiasMfjkbqhGaQ6dEL2jajxnBvsyISWfcyktHSDnYJjNi7_fwW6lUIeDlKeRS3O9bHsuqG6DA11_bFCIeusFjSjNuXGUzo_5r7dKbs0BgaNDjH8AjEEPVqiXTArjDoaaj95964Ve6757Qzs6uM9DQbHANj3DNqIhi1fmIGRG3fChjzNyXfZ7a75B2SNJhI>52897</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Provide hint for unused flags accidentally passed without -Xclang
        </td>
    </tr>

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

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

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

<pre>
    ```
clang tmp.c -dependency-dot output.dot
# clang-14: warning: argument unused during compilation: '-dependency-dot output.dot' [-Wunused-command-line-argument]
```

When an unused argument is recognized to be one that requires `-Xclang`, it would be helpful to add a note (separately or in the same diagnostic) saying something like `did you mean to use '-Xclang -dependency-dot -Xclang output.dot?`
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJx9Uk2PmzAQ_TVwGYGIISQ5cNh2lXNv2-tgD-Ctsak_NqK_vgNJ-qFKlSwYZp7fvDdD79TaZW31ONVrVr1Ig3aEOC-lhELRQlaRlWuhXASX4pJiyeEdm4kadnxxaLL6BW7orbbjFqIf00w2QrIpkAKVPFdAunnRBqN2dkNl4vSfHuIE2fFT8XanKPjujFYVRlsqnvzZ8fWh5W8b9-fbRBbQPkX8EqUDeJJutPoHp6ODnsBZgjhh5Mr3pD0FYLLi6-5voxWfQUe4uWTUBp_ILEMy22VUTA3WRWJD50ALeoxkVnAetGVSgoAzgdI4Wheilpm4cGrdJhLcTHHaIqO_0dZTaQWrSzATK2d6lr4P6i7ln6U8838Mrr4yTa66Wl3qC-ZRR0PdF-8-tGLhmgcwsLTHUAaDYwCUkos2omHdC4atctNxYtZnhzx5000xLoFXl4krn5ERqS95M_xhzMfzVSzevZPkFV51CIkCB0dxvpzyqeuR6stwEgqxuhCeh6oZDq2sxOHUSjy0ucGeTOh49ZkQlm6wU3DMu851Jxh5EOJcNdW5acu-H5juSL1sa6xEkzUVzahNuekonR9z3-2S-jQGLhodYvhdZKd6tER7O-bHxJ59F9eFAlod-Qfx-S6g2w38BL3VEQI">