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    <head>
      <base href="http://llvm.org/bugs/" />
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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 --- - Clang emits DWARF4 forms with -gdwarf-2 option"
   href="http://llvm.org/bugs/show_bug.cgi?id=17710">17710</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Clang emits DWARF4 forms with -gdwarf-2 option
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>new-bugs
          </td>
        </tr>

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

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

        <tr>
          <th>Reporter</th>
          <td>samsonov@google.com
          </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>$ >z.c
$ ./bin/clang -gdwarf-2 z.c -c -o z.o
$ ./bin/llvm-dwarfdump --debug-dump=info z.o | grep "DW_AT_stmt_list"
              DW_AT_stmt_list [DW_FORM_sec_offset]    (0x00000000)

DW_FORM_sec_offset first appeared in DWARF4, while the emitted compile unit is
said to have DWARF-2:
$ ./bin/llvm-dwarfdump --debug-dump=info z.o | grep "version"
0x00000000: Compile Unit: length = 0x00000022 version = 0x0002 abbr_offset =
0x0000 addr_size = 0x08 (next unit at 0x00000026)</pre>
        </div>
      </p>
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