<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/56343>56343</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [llvm 14] clang++ not including custom gcc include paths
        </td>
    </tr>

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

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

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

<pre>
    Hi,
  I tried to update our software stack to LLVM 14.0.6 but noticed that clang++ is not searching headers in my custom gcc directory [a]. It worked fine for llvm 12.0.1. This is causing compilation errors as clang++ is not able to find `memory_resource` . Any idea how to avoid/fix this issue?
Thanks,   

[a] LLVM 14
```
> which g++
/cvmfs/cms-ib.cern.ch/nweek-02739/el8_amd64_gcc10/external/gcc/10.3.0-84898dea653199466402e67d73657f10/bin/g++
> clang++ --print-search-dirs
programs: =/cvmfs/cms-ib.cern.ch/nweek-02739/el8_amd64_gcc10/external/gcc/10.3.0-84898dea653199466402e67d73657f10:/cvmfs/cms-ib.cern.ch/nweek-02739/el8_amd64_gcc10/external/llvm/12.0.1-dd4c586a5bebc335346bb0e879f6f0aa/bin:/cvmfs/cms-ib.cern.ch/nweek-02739/el8_amd64_gcc10/external/gcc/10.3.0-84898dea653199466402e67d73657f10/lib/gcc/x86_64-redhat-linux-gnu/10.3.0/../../../../x86_64-redhat-linux-gnu/bin
libraries: =/cvmfs/cms-ib.cern.ch/nweek-02739/el8_amd64_gcc10/external/llvm/12.0.1-dd4c586a5bebc335346bb0e879f6f0aa/lib64/clang/12.0.1:/cvmfs/cms-ib.cern.ch/nweek-02739/el8_amd64_gcc10/external/gcc/10.3.0-84898dea653199466402e67d73657f10/lib/gcc/x86_64-redhat-linux-gnu/10.3.0:/cvmfs/cms-ib.cern.ch/nweek-02739/el8_amd64_gcc10/external/gcc/10.3.0-84898dea653199466402e67d73657f10/lib/gcc/x86_64-redhat-linux-gnu/10.3.0/../../../../lib64:/cvmfs/cms-ib.cern.ch/nweek-02739/el8_amd64_gcc10/external/llvm/12.0.1-dd4c586a5bebc335346bb0e879f6f0aa/bin/../lib64:/lib/../lib64:/usr/lib/../lib64:/cvmfs/cms-ib.cern.ch/nweek-02739/el8_amd64_gcc10/external/gcc/10.3.0-84898dea653199466402e67d73657f10/lib/gcc/x86_64-redhat-linux-gnu/10.3.0/../../../../x86_64-redhat-linux-gnu/lib:/cvmfs/cms-ib.cern.ch/nweek-02739/el8_amd64_gcc10/external/gcc/10.3.0-84898dea653199466402e67d73657f10/lib/gcc/x86_64-redhat-linux-gnu/10.3.0/../../..:/lib:/usr/lib
```
[b] LLVM 12
```
> which gcc
/cvmfs/cms-ci.cern.ch/week1/PR_8803ebed/el8_amd64_gcc10/external/gcc/10.3.0-84898dea653199466402e67d73657f10/bin/gcc
> clang++ --print-search-dirs
programs: =/cvmfs/cms-ci.cern.ch/week1/PR_8803ebed/el8_amd64_gcc10/external/gcc/10.3.0-84898dea653199466402e67d73657f10:/cvmfs/cms-ci.cern.ch/week1/PR_8803ebed/el8_amd64_gcc10/external/llvm/14.0.6-be34f65399c081aae892f70eb0377d30/bin:/usr/lib/gcc/x86_64-redhat-linux/8/../../../../x86_64-redhat-linux/bin
libraries: =/cvmfs/cms-ci.cern.ch/week1/PR_8803ebed/el8_amd64_gcc10/external/llvm/14.0.6-be34f65399c081aae892f70eb0377d30/lib64/clang/14.0.6:/usr/lib/gcc/x86_64-redhat-linux/8:/usr/lib/gcc/x86_64-redhat-linux/8/../../../../lib64:/lib/../lib64:/usr/lib/../lib64:/lib:/usr/lib

```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzVV9tu5DYM_RrPC2FDlnx9mIekadAFtkBRLPo60M1jNb4MJDmT9OtL2c5ldzJogx3sIoBh2ZRIHh6KpixG9bj9zUT0l4jcROQK4BN4a7QCP8J0UNxrGCcLbmz8kVsNznN5FyY_f_7rd0izhCQFiMnDMHojg17LPciOD_uIXuMFxoU5cJpb2ZphD63mSlsHZoD-EeTk_NjDXkpQxmrpR_sIUX7No_wmgU8ejqO9Q7uNGTQ0o4Wuu-8hpeg4TeBLi-bxknxywbYc-4PpuDfjANraEd1w9xYcLjodwkCzCqKC9LpHxzurHYYrNUoggavhEYzSHNrxGBbz-9GoiN425gHjnD27SUfsdiHvS8uHO4dcAsAiWe9LNE-UrcKCrNfyyn6FY2tkCyvQVUxv5X3fuDD2LjYikdoOiWxRMBy1vosJLVmNb7qrdrxXRbZDKlMSJA8e1_IOH1GE95QkLCFxlVV1hVEVOUvrOiuKjFBdlKpkRV42s6owQ9D6CgkCfM1jHB-sGXy85DXG3Lll4cGOe8t7F7EriNjNT4mAXYq4sNmC33m7xUplMq8KngstJGM5ywohiK7KuikawvnK3MW8vzdtnRHPWg9VsSuy2GqFBRl3Zpge4v0wPdvDhyQ5vZ1XC5HNCUYvluM34sIZfjfViKPIgtNlV66aH4T9j4Hy7T2yEP9za-wUyhLYt9LJ2bNzH5T-82rB-IeM7DmB3-TszU6ZX4uXbkr_q5sinrc6qTSvWAmkpDj-8eeuqgjTQqtLs7N21Gc0l-mmPzaKk631ve6fKn8-RcZCs6xB53UtSZVyrquaNiXRgrCyVOyJxZOyPrvlUFr9_xp6R4v74XGftLpZ871UXIS57_rini3xr4t4o7ZM1azmG298p7dY8supPwuF_7puwlHeDLKb1Hz6f_mXWIQaDty3bjPZbtt6f3CL9xC68e2EX8axf8lHGLAOx7_xLwRf58N9SHlesIxt2i1jXKV5VYusEWUqaYUZ0znRlBWYMkk3HRe6cwFuROmgj-v_AaUIe2O2lFBKSpLiWKd5wuo0U4IxobOMYsVFGdE9N10ScCSj3W_sdoYkpr3Dyc44714muXNmP-iZnWCfT74d7db10z-8abjdzM63M_h_Abq6D5I">