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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang-cl incorrectly defines __cpp_rtti when /GR- is specified"
href="https://bugs.llvm.org/show_bug.cgi?id=46230">46230</a>
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<th>Summary</th>
<td>clang-cl incorrectly defines __cpp_rtti when /GR- is specified
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Driver
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>zufuliu@163.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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</tr></table>
<p>
<div>
<pre>// test-rtti.cpp
#ifdef __cpp_rtti
#warning __cpp_rtti defined
#endif
#ifdef _CPPRTTI
#warning _CPPRTTI defined
#endif
tested llvm 10, and 693ff89f47ffe1f357ddd3a5112cd90eb8b3e2d1
clang-cl -c /GR- test-rtti.cpp
test-rtti.cpp(2,2): warning: __cpp_rtti defined [-W#warnings]
#warning __cpp_rtti defined
^
1 warning generated.
clang-cl -c /GR test-rtti.cpp
test-rtti.cpp(2,2): warning: __cpp_rtti defined [-W#warnings]
#warning __cpp_rtti defined
^
test-rtti.cpp(5,2): warning: _CPPRTTI defined [-W#warnings]
#warning _CPPRTTI defined
^
2 warnings generated.
clang -c -frtti test-rtti.cpp
test-rtti.cpp:2:2: warning: __cpp_rtti defined [-W#warnings]
#warning __cpp_rtti defined
^
test-rtti.cpp:5:2: warning: _CPPRTTI defined [-W#warnings]
#warning _CPPRTTI defined
^
2 warnings generated.
clang -c -fno-rtti test-rtti.cpp
// expected, neither is defined.</pre>
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