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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 --- - Driver passes down -stdlib for Darwin"
   href="https://llvm.org/bugs/show_bug.cgi?id=30548">30548</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Driver passes down -stdlib for Darwin
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </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>hahnjo@hahnjo.de
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Currently, Darwin constructs the header search paths in cc1. For this to work,
it needs information about the C++ STL. This is solved by passing down the
-stdlib argument to cc1.

ToolChain::AddClangCXXStdlibIncludeArgs states that this solution is legacy.
Instead, Darwin::AddClangCXXStdlibIncludeArgs should be implemented, maybe
similar to Linux::AddClangCXXStdlibIncludeArgs.

This also introduces problems with the test Driver/darwin-stdlib.cpp which
fails if CLANG_DEFAULT_CXX_STDLIB and will therefore shortly be XFAILed in that
case.</pre>
        </div>
      </p>
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