<html>
    <head>
      <base href="https://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 --- - lld produces invalid executable when statically linking against pthread"
   href="https://llvm.org/bugs/show_bug.cgi?id=23390">23390</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>lld produces invalid executable when statically linking against pthread
          </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>Windows NT
          </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>All Bugs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>davide@freebsd.org
          </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>% cat thread.c
#include <pthread.h>

pthread_mutex_t mtx;

int
main(void)
{
  pthread_mutex_lock(&mtx);

  return (0);
}

% clang thread.c -o thread -c
% /exps/llvm/build/bin/lld -flavor gnu -Bstatic -o thread /usr/lib/crt1.o
/usr/lib/crti.o /usr/lib/crtbeginT.o -L/usr/lib thread.o -lpthread -lgcc
-lgcc_eh -lc -lgcc -lgcc_eh /usr/lib/crtend.o /usr/lib/crtn.o
% ./thread
Segmentation fault (core dumped)


lldb not really helpful here:
% /exps/llvm/build/bin/lldb ./thread
(lldb) target create "./thread"
Current executable set to './thread' (x86_64).
(lldb) run
Process 37235 launching
Killed</pre>
        </div>
      </p>
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