<html>
    <head>
      <base href="http://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 --- - Clang unconditionally defines macros for SSE and SSE2"
   href="http://llvm.org/bugs/show_bug.cgi?id=20602">20602</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Clang unconditionally defines macros for SSE and SSE2
          </td>
        </tr>

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

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

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

        <tr>
          <th>Reporter</th>
          <td>sylvestre@debian.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>Initially reported here:
<a href="https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=632472">https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=632472</a>


$ cat sse.h
#ifdef __SSE__
#warning "SSE defined!"
#endif
$ gcc sse.h
$ clang sse.h
sse.h:2:2: warning: "SSE defined!" [-W#warnings]
#warning "SSE defined!"
 ^
1 warning generated.</pre>
        </div>
      </p>
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