<html>
    <head>
      <base href="http://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 --- - libc++ has no minor or patch version, and no version symbols"
   href="http://llvm.org/bugs/show_bug.cgi?id=19817">19817</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>libc++ has no minor or patch version, and no version symbols
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>libc++
          </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>enhancement
          </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>richardg.work@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu, mclow.lists@gmail.com
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The libc++.so.1 library symlink points to libc++.so.1.0 for both llvm 3.3 and
3.4. However, these libraries contain different symbols. For example, I can see
std::__1::shared_mutex::lock is present in the llvm 3.4 libc++.so. This may
cause a problem for distributing binaries built on llvm 3.4 to a machine with
llvm 3.3 installed.

Correct me if I'm wrong, but I believe the libc++.so library should distinguish
these ambiguous libraries using patch versions, ie. create libc++.so.1.0.1, and
include version symbols similar to GLIBCXX_* symbols in the libstdc++.so
library.</pre>
        </div>
      </p>
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