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    <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 --- - -fsanitize-coverage=trace-pc-guard fails on OS X"
   href="https://llvm.org/bugs/show_bug.cgi?id=31247">31247</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>-fsanitize-coverage=trace-pc-guard fails on OS X
          </td>
        </tr>

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

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

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>MacOS X
          </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>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>llvm@tim-smith.us
          </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>Trying to build anything [1] with `-fsanitize-coverage=trace-pc-guard` fails on
OS X with the message:

$ /usr/local/opt/llvm/bin/clang -o test test.c -fsanitize=address
-fsanitize-coverage=trace-pc-guard

fatal error: error in backend: Global variable '__sancov_gen_' has an invalid
section specifier '__sancov_guards': mach-o section specifier requires a
segment and section separated by a comma.
clang-4.0: error: clang frontend command failed with exit code 70 (use -v to
see invocation)
clang version 4.0.0 (<a href="http://llvm.org/git/clang.git">http://llvm.org/git/clang.git</a>
012b8f13a36df5f78c62236cb3b3fc595eaa7e00) (<a href="http://llvm.org/git/llvm.git">http://llvm.org/git/llvm.git</a>
c018e3b3038be0ecf72417c1f3788d7db643b221)
Target: x86_64-apple-darwin16.1.0
Thread model: posix
InstalledDir: /usr/local/opt/llvm/bin


Compilation succeeds with -fsanitize-coverage=trace-pc.


[1] i.e. int main() { return 0; }</pre>
        </div>
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