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    <head>
      <base href="https://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW " title="NEW --- - clang-cl compatibility command line parse error" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D23709&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=6YiRQG06I545mKVDW6QBCpJrAO3siFf88410Lzm4WjY&s=utMjBwOMQ0OEvtuclEL4c10GtL40tkXsSyC88Q4HkZ4&e=">23709</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>clang-cl compatibility command line parse error
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Windows NT
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Driver
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>admin@shily.net
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>When the additional include directory ends with a backslash, the clang-cl will
parse error.

Settings in visual studio:
c:\third_party\include\
or use the macro
$(ProjectDir)

VS generate command line:
/c /IC:\third_party\include\ /IY:\proj\dir\ /Zi /nologo /W4 ...

clang-cl out put:(with -###)
... "-I" "C:\\third_party\\include /IY:\\proj\\dir /ZI" ...

It will cause some header file not found.</pre>
        </div>
      </p>
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