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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - feraiseexcept is stripped out of C++ programs"
href="http://llvm.org/bugs/show_bug.cgi?id=18008">18008</a>
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<th>Summary</th>
<td>feraiseexcept is stripped out of C++ programs
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>tjablin@gmail.com
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>feraiseexcept is stripped out of C++ (but not C programs). Here is a simple
test case:
echo -e "#include <fenv.h>\\n void foo(void) { feraiseexcept(1); }" | clang -x
c++ -emit-llvm -S -o - - -O2
The underlying problem is that clang is resolving renamed symbols in the wrong
way. fenv.h says:
int feraiseexcept_renamed(void) __asm__ ("" "feraiseexcept");
extern inline int feraiseexcept(void) {
...
return feraiseexcept_renamed();
}
In gcc, the call to feraiseexcept_renamed resolves to the external version of
feraiseexcept. In clang, the call to feraiseexcept_renamed resolves to the
inlined version.</pre>
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