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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_cuda_runtime_wrapper.h __THROW macro redefinition inconsistent with libc"
href="https://bugs.llvm.org/show_bug.cgi?id=47869">47869</a>
</td>
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<th>Summary</th>
<td>__clang_cuda_runtime_wrapper.h __THROW macro redefinition inconsistent with libc
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>CUDA
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>daravi@alumni.ubc.ca
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>Trying to build TensorFlow with LLVM trunk, I arrived at this error
```
++ compilation of rule '//tensorflow/core/kernels/rnn:gru_ops_gpu' failed (Exit
1)
In file included from <built-in>:1:
In file included from
/opt/llvm-master/lib/clang/12.0.0/include/__clang_cuda_runtime_wrapper.h:211:
In file included from /opt/llvm-master/bin/../include/c++/v1/string.h:60:
In file included from /usr/include/string.h:431:
In file included from /usr/include/strings.h:144:
/usr/include/bits/strings_fortified.h:23:8: error: exception specification in
declaration does not match previous declaration
__NTH (bcopy (const void *__src, void *__dest, size_t __len))
^
/usr/include/strings.h:38:13: note: previous declaration is here
extern void bcopy (const void *__src, void *__dest, size_t __n)
```
Looking at those files I see that the macros are defined in
`/usr/include/sys/cdefs.h`. This file defines __THROW, __NTH and __NTHNL with
consistent exception specifier as they are used to declare and define the same
functions. However `__clang_cuda_runtime_wrapper.h` re-defines only the
`__THROW` macro:
```
// __THROW is redefined to be empty by device_functions_decls.h in CUDA.
Clang's
// counterpart does not do it, so we need to make it empty here to keep
// following CUDA includes happy.
#undef __THROW
#define __THROW
```
I think the other two macros should also be cleared to avoid breaking the
exception specifier consistency in libc. If you agree please let me know and I
will be glad to contribute the fix.</pre>
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