<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 --- - Don't define __x86_64__ in microsoft mode?"
href="http://llvm.org/bugs/show_bug.cgi?id=20896">20896</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Don't define __x86_64__ in microsoft mode?
</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>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>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nicolasweber@gmx.de
</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>v8 uses this technique to check for x32:
#if defined(__x86_64__) && !defined(__LP64__)
...
#endif
With cl.exe, this works as cl.exe doesn't define __x86_64__. With clang-cl,
this fails since clang-cl does define __x86_64__ but doesn't define __LP64__
(because Windows is LLP64).
clang-cl probably shouldn't define __x86_64__? It already defines the
cl-equivalent _M_X64.
<a href="https://codereview.chromium.org/18014003/diff/161001/src/base/build_config.h">https://codereview.chromium.org/18014003/diff/161001/src/base/build_config.h</a></pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>