<html>
    <head>
      <base href="http://bugs.llvm.org/">
    </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 - llvm-ar cannot be invoked with dash arguments"
   href="http://bugs.llvm.org/show_bug.cgi?id=31973">31973</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>llvm-ar cannot be invoked with dash arguments
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>tools
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </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>llvm-ar
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>ed@80386.nl
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Most implementations of ar(1) can be invoked like this:

ar rs bla.a foo.o bar.o

But also like this:

ar -rs bla.a foo.o bar.o

Only the latter is standardised by POSIX.

What's problematic is that our copy of llvm-ar only supports the former. I've
seen various Makefiles break as a result of this. Examples include Google's
LevelDB.</pre>
        </div>
      </p>


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