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      <base href="https://bugs.webkit.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Build failure with clang on Linux"
   href="https://bugs.webkit.org/show_bug.cgi?id=157382">157382</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Build failure with clang on Linux
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>Other
          </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>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>WebKit Gtk
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>krejzi&#64;email.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>bugs-noreply&#64;webkitgtk.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>When building webkitgtk-2.12.2 with clang 3.9.0 (trunk 268575) and using libc++ as the default C++ library, webkitgtk build fails with the following error:

In file included from &lt;built-in&gt;:1:
In file included from /sources/webkitgtk-2.12.2/Source/WebKit2/WebKit2Prefix.h:69:
In file included from /usr/bin/../include/c++/v1/algorithm:631:
/usr/bin/../include/c++/v1/type_traits:1331:59: error: incomplete type 'WebCore::IDBRequestData' used in type trait expression
    : public integral_constant&lt;bool, __is_base_of(_Bp, _Dp)&gt; {};
                                                          ^
/usr/bin/../include/c++/v1/type_traits:543:37: note: in instantiation of template class 'std::__1::is_base_of&lt;std::__1::allocator_arg_t, WebCore::IDBRequestData&gt;' requested
      here
struct __lazy_and : __lazy_and_impl&lt;_P1::type::value, _Pr...&gt; {};
                                    ^
/usr/bin/../include/c++/v1/tuple:664:9: note: in instantiation of template class 'std::__1::__lazy_and&lt;std::__1::is_base_of&lt;std::__1::allocator_arg_t, WebCore::IDBRequestData&gt;,
      std::__1::__lazy_all&lt;std::__1::__dependent_type&lt;std::__1::is_default_constructible&lt;const WebCore::IDBRequestData &amp;&gt;, true&gt;,
      std::__1::__dependent_type&lt;std::__1::is_default_constructible&lt;const WebCore::IDBObjectStoreInfo &amp;&gt;, true&gt; &gt; &gt;' requested here
        __lazy_and&lt;
        ^
/usr/bin/../include/c++/v1/tuple:670:5: note: in instantiation of default argument for 'tuple&lt;WebCore::IDBRequestData, WebCore::IDBObjectStoreInfo, true&gt;' required here
    tuple(_AllocArgT, _Alloc const&amp; __a)
    ^~~~~
/sources/webkitgtk-build/DerivedSources/WebKit2/WebIDBConnectionToClientMessages.h:180:11: note: while substituting deduced template arguments into function template 'tuple'
      [with _AllocArgT = WebCore::IDBRequestData, _Alloc = WebCore::IDBObjectStoreInfo, _Dummy = (no value), $3 = (no value)]
        : m_arguments(requestData, info)
          ^
/sources/webkitgtk-2.12.2/Source/WebKit2/DatabaseProcess/IndexedDB/WebIDBConnectionToClient.h:40:7: note: forward declaration of 'WebCore::IDBRequestData'
class IDBRequestData;
      ^
1 error generated.</pre>
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