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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Aarch64: libstdc++ std::thread, when compiled with clang, "pure virtual method called""
href="https://llvm.org/bugs/show_bug.cgi?id=23428">23428</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Aarch64: libstdc++ std::thread, when compiled with clang, "pure virtual method called"
</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>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++11
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>danilo.piparo@cern.ch
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>cat stdthreadbug.cpp
#include <thread>
int main()
{
std::thread t([](){});
t.join();
}
$clang++ -v
clang version 3.7.0 (trunk 236571) (llvm/trunk 236570)
Target: aarch64-unknown-linux-gnu
Thread model: posix
$clang++ -std=c++11 -pthread stdthreadbug.cpp -o stdthreadbug
$./stdthreadbug
pure virtual method called
terminate called without an active exception
Aborted
Note that this works:
cat stdthreadbugkludge.cpp
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
#include <thread>
int main()
{
std::thread t([](){});
t.join();
}
One of the many ways in which one might fix this is the following:
Index: lib/Basic/Targets.cpp
===================================================================
--- lib/Basic/Targets.cpp (revision 236571)
+++ lib/Basic/Targets.cpp (working copy)
@@ -4926,6 +4926,11 @@
if (Crypto)
Builder.defineMacro("__ARM_FEATURE_CRYPTO");
+
+ Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1");
+ Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2");
+ Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4");
+ Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8");
}
void getTargetBuiltins(const Builtin::Info *&Records,</pre>
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