<html>
    <head>
      <base href="https://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 - Clang does not pass `-pie` to the linker when using `-fPIE`"
   href="https://bugs.llvm.org/show_bug.cgi?id=48109">48109</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Clang does not pass `-pie` to the linker when using `-fPIE`
          </td>
        </tr>

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

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

        <tr>
          <th>Reporter</th>
          <td>harley.paterson@postgrad.otago.ac.nz
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Clang does not pass the `-pie` argument to the linker implicitly when `-fPIE`
is used.

This is not strictly a bug, but a difference in the default behavior of Clang
and GCC which can cause some programs to be unexpectedly linked as classic
position dependent excutables (`PT_EXEC` for ELFs), rather than a position
independent executable (`PT_DYN` for ELFs)

See LLD bug report [48035](<a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - LLD may incorrect mark dynamic executable as PT_EXEC (static executable) in some situations."
   href="show_bug.cgi?id=48035">https://bugs.llvm.org/show_bug.cgi?id=48035</a>)for a
detailed discussion.

I suggest modifying Clang's default behavior to match GCC: Implicitly pass
`-pie` when `-fPIE` or `-fpie` is used.</pre>
        </div>
      </p>


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