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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 --- - FreeBSD: openal-soft-1.17.2 link fail with "error: cannot preempt symbol.." error"
   href="https://llvm.org/bugs/show_bug.cgi?id=30960">30960</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>FreeBSD: openal-soft-1.17.2 link fail with "error: cannot preempt symbol.." error
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>lld
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>FreeBSD
          </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>ELF
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>grimar@accesssoftek.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=17573" name="attach_17573" title="CPIO">attachment 17573</a> <a href="attachment.cgi?id=17573&action=edit" title="CPIO">[details]</a></span>
CPIO

When trying to link that port, lld fails with next errors:

/usr/bin/ld: error: cannot preempt symbol alIsExtensionPresent
/usr/bin/ld: error: cannot preempt symbol alcGetCurrentContext
/usr/bin/ld: error: cannot preempt symbol alcGetContextsDevice
/usr/bin/ld: error: cannot preempt symbol alcGetIntegerv
/usr/bin/ld: error: cannot preempt symbol alcGetError
/usr/bin/ld: error: cannot preempt symbol alGenBuffers
/usr/bin/ld: error: cannot preempt symbol alBufferData
/usr/bin/ld: error: cannot preempt symbol alGetError
....<more>

Original reproduce file is attached. 

While investigating reduced to:
dso.c:
__attribute__((visibility("protected"))) void foo() {}

main.c:
extern void foo();
int main() { foo(); return 0; }

root@freebsd:~/tests/3openal # clang dso.c -shared -o dso.so
root@freebsd:~/tests/3openal # clang main.c dso.so -o main
/usr/bin/ld: error: cannot preempt symbol foo
clang: error: linker command failed with exit code 1 (use -v to see invocation)</pre>
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