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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Testsuite uses ::fabs without <math.h>"
href="https://llvm.org/bugs/show_bug.cgi?id=26120">26120</a>
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<th>Summary</th>
<td>Testsuite uses ::fabs without <math.h>
</td>
</tr>
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<th>Product</th>
<td>libc++
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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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>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>zilla@kayari.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>A number of tests in the testsuite (particularly unordered container tests) use
fabs() without qualification, and without #include <math.h>, only #include
<cmath> (sometimes only indirectly).
That isn't portable, because some implementations only define std::fabs() when
<cmath> is included, and relying on transitive includes is not portable either.
e.g. std/containers/unord/unord.map/unord.map.cnstr/copy.pass.cpp only includes
<cmath> indirectly, and uses fabs() without qualification, so fails to compile
using libstdc++</pre>
</div>
</p>
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