<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=http://email.email.llvm.org/c/eJylUttu3CAQ_Rr8gmxh8GX94IdcVDVSK0VJ0_QVm1kvLQaLSzb5-47XuWyrvlVCXGbgzDlzGJx66Ucj7UTEBS1ZwYqSsGvCLo7aKncMa_jHLb2_FVTwfNBxy369p1d339bk96u7ZKOegXJWdrRsipbwK_qA6RWvLMqdaPgbaoiw0Oioh8U7lUZYIUjDThTy0dA8RGX0QMQ1ziPhlzhovp9DPrp5kVEP2uj4kj-BD9pZvFd2BW9phBCLcVkQa6vkISQT_4Jfj0fprd70JvvLuqOl0k9pBhupnqzzoKi29PwJ4e2_eGGYkvoyf3zFyd9wSH19xmMPHuym9BDjsraU8E84PBiQAUJhzNNcOD9hrEYHGK7Ynp8wxoDbteDzM26UG9fzQ0D6X07B4hBns9XZ5huUhzqww4NzMUQvl00JPep42LbI_Ky3KHUOTyO9uLyhs1OAYnc3dHTJKKocjQcdtreTTe-XCO-KTPVCdaKTmUzx4Hwf0ywnZ5-z5E3_p9IJAdJQoIWrHlT7uuSvMvGoQ0iwyqsFY1V26PdD07b7BvBblY0QXdsqvt9VHdSgOiZEZuQAJvToAPY7-_-SuueMYzVWl6JipShk3ZW7dqiqquHlUDekYjBLbd79ynx_ghzSFDBpdIgfZmYyBPxPAG8Mo44G-s_uuNqTArx_sa2_H55kJ2L9idVvKOcixA>53004</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            How to use clang-cl with libc++
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
      </td>
    </tr>

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

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

<pre>
    clang: 10.0.1
windows: XP SP3 32-bit
MS CRT: VCRuntime 2019 16.7, UCRT 10.1.18362.1
step to reproduce: `clang-cl -stdlib=libc++ -fms-compatibility-version=19.27 test.cpp`
result: `clang-cl: warning: unknown argument ignored in clang-cl: '-stdlib=libc++' [-Wunknown-argument]`
reference: https://releases.llvm.org/5.0.0/projects/libcxx/docs/UsingLibcxx.html

I want to bootstrap clang with clang+libc++ in msvc ABI mode (I could do this with gnu ABI mode).
</pre>
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