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      <base href="http://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 --- - clang fails explicit instantiate explicitly specialized classes with visibility-hidden"
   href="http://llvm.org/bugs/show_bug.cgi?id=17531">17531</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>clang fails explicit instantiate explicitly specialized classes with visibility-hidden
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>3.3
          </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>LLVM Codegen
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>artur@ebasoft.com.pl
          </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>Created <span class=""><a href="attachment.cgi?id=11355" name="attach_11355" title="full code with CMakeConfig reproducing bug.">attachment 11355</a> <a href="attachment.cgi?id=11355&action=edit" title="full code with CMakeConfig reproducing bug.">[details]</a></span>
full code with CMakeConfig reproducing bug.

clang 3.3 and trunc fails instantiate 
Case:
explicitly instantiate class which is explicitly specialized and unspecialized
declaration has missing visibility(default) then other specialized variants
will not be instantiated at all

Simplified code , please analyze attached bz2 archive wich reproducess bug.
Notice : /*VISIBILITY_DEFAULT*/
Effect: foo_plugin_base_t<THIS_TYPE,double> will not be instantiated
Effect: There are no warrnings, just missing symbols in .so
CC=clang CXX=clang++ cmake ../ -DCMAKE_CXX_FLAGS="-std=c++11
-fvisibility=hidden -fvisibility-inlines-hidden"

#define VISIBILITY_DEFAULT __attribute__ ((visibility ("default")))

template<typename THIS_TYPE, typename value_type>
struct /*VISIBILITY_DEFAULT*/ foo_plugin_base_t
  {
  };

template<typename THIS_TYPE>
struct VISIBILITY_DEFAULT foo_plugin_base_t<THIS_TYPE,double>
  {
  void may_custom_method();
  };

template struct foo_plugin_base_t<foo_t<double>,double>;
template struct foo_plugin_t<foo_t<double>,double>;</pre>
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