<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 --- - -Wall flag position should not matter"
   href="https://llvm.org/bugs/show_bug.cgi?id=24376">24376</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>-Wall flag position should not matter
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>3.6
          </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>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>C++
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>j2jey@hotmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Here is a small example

int main(){ 
    int a; 
    return 0; 
}

I compile it with
clang++ -Wall -W -Werror -Wno-error=unused-variable main.cpp

And I have the expected warning.
Now If I compile with:
clang++ -W -Werror -Wno-error=unused-variable -Wall main.cpp

It triggers an error, so it seems like the position of Wall changes the
behavior, which I think is not expected.

<a href="http://stackoverflow.com/questions/31855216/clang-w-flag-order">http://stackoverflow.com/questions/31855216/clang-w-flag-order</a></pre>
        </div>
      </p>
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