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      <base href="https://llvm.org/bugs/" />
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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 --- - gcc -Wattribute warnings for several libc++ headers"
   href="https://llvm.org/bugs/show_bug.cgi?id=24988">24988</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>gcc -Wattribute warnings for several libc++ headers
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>libc++
          </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>All Bugs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>dimitry@andric.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>Created <span class=""><a href="attachment.cgi?id=14956" name="attach_14956" title="libc++ -Wattributes warnings from gcc 4.9.2">attachment 14956</a> <a href="attachment.cgi?id=14956&action=edit" title="libc++ -Wattributes warnings from gcc 4.9.2">[details]</a></span>
libc++ -Wattributes warnings from gcc 4.9.2

When building libc++ with gcc 4.9.2, there are quite a number of -Wattributes
warnings.  A log of all of them is attached.

They are either "type attributes ignored after type is already defined", for
example with _LIBCPP_DECLARE_STRONG_ENUM:

In file included from include/__mutex_base:16:0,
                 from include/condition_variable:111,
                 from src/condition_variable.cpp:14:
include/system_error:345:1: warning: type attributes ignored after type is
already defined [-Wattributes]
 };
 ^

or "visibility attribute ignored because it conflicts with previous
declaration", like with:

In file included from include/memory:604:0,
                 from include/condition_variable:112,
                 from src/condition_variable.cpp:14:
include/utility:471:50: warning: type attributes ignored after type is already
defined [-Wattributes]
 template <class _Tp> class _LIBCPP_TYPE_VIS_ONLY reference_wrapper;
                                                  ^
In file included from src/condition_variable.cpp:14:0:
include/condition_variable:161:1: warning: 
std::__1::condition_variable_any::condition_variable_any() : visibility
attribute ignored because it [-Wattributes]
 condition_variable_any::condition_variable_any()
 ^
include/condition_variable:127:5: warning: conflicts with previous declaration
here [-Wattributes]
     condition_variable_any();
     ^
include/condition_variable:129:10: warning: conflicts with previous declaration
here [-Wattributes]
     void notify_one() _NOEXCEPT;
          ^
include/condition_variable:130:10: warning: conflicts with previous declaration
here [-Wattributes]
     void notify_all() _NOEXCEPT;
          ^</pre>
        </div>
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