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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 - ld cannot link tests with #pragma omp atomic"
href="https://bugs.llvm.org/show_bug.cgi?id=32506">32506</a>
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<th>Summary</th>
<td>ld cannot link tests with #pragma omp atomic
</td>
</tr>
<tr>
<th>Product</th>
<td>OpenMP
</td>
</tr>
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<th>Version</th>
<td>unspecified
</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>Clang Compiler Support
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ilia.taraban@intel.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>==============atomic.c=================
int main(){
struct {
char a ;
int b:16;
} s;
#pragma omp atomic
s.b++;
}
=======================================
<span class="quote">>>>clang -v</span >
clang version 5.0.0 (trunk 299342)
...
<span class="quote">>>>clang -O0 -fopenmp atomic.c</span >
/tmp/atomic-36a041.o: In function `main':
atomic.c:(.text+0x39): undefined reference to `__atomic_load'
atomic.c:(.text+0x7b): undefined reference to `__atomic_compare_exchange'
But if you add "-latomic":
<span class="quote">>>>clang -O0 -fopenmp atomic.c -latomic
>>></span >
(no errors)</pre>
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