<html>
    <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 --- - LIBCXXABI_GCC_TOOLCHAIN is not used during configuration"
   href="https://llvm.org/bugs/show_bug.cgi?id=27950">27950</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>LIBCXXABI_GCC_TOOLCHAIN is not used during configuration
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>libc++abi
          </td>
        </tr>

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

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

        <tr>
          <th>OS</th>
          <td>Linux
          </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>All Bugs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>eugene.zelenko@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>LIBCXXABI_GCC_TOOLCHAIN is not used during configuration, so it's lead to
failure on RHEL 6 where GCC 4.4 is found by default. But configuration is OK
when I specify newer GCC path as --gcc-toolchain in CMAKE_CXX_FLAGS.

Same happens with LIBUNWIND_GCC_TOOLCHAIN for libunwind.</pre>
        </div>
      </p>
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