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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Missing __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 et al for non-x86/x64 architectures"
href="http://llvm.org/bugs/show_bug.cgi?id=16917">16917</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Missing __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 et al for non-x86/x64 architectures
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.3
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>Driver
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>s_llvm@nedprod.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Here's an illustrative patch for the ARM driver, but I think one of these needs
to go into every architecture supporting CAS atomics:
--- a/tools/clang/lib/Basic/Targets.cpp
+++ b/tools/clang/lib/Basic/Targets.cpp
@@ -3819,6 +3859,15 @@ public:
// when Neon instructions are actually available.
if ((FPU & NeonFPU) && !SoftFloat && IsARMv7)
Builder.defineMacro("__ARM_NEON__");
+
+ // These need setting for every architecture I think, but I'll just patch
+ // for ARM now. See <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - libstdc++ std::thread, when compiled with clang, "pure virtual method called""
href="show_bug.cgi?id=12730">http://llvm.org/bugs/show_bug.cgi?id=12730</a> for more
info.
+ if ('6' <= CPUArch[0]) {
+ 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");
+ }
}
virtual void getTargetBuiltins(const Builtin::Info *&Records,
unsigned &NumRecords) const {
Related is <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - libstdc++ std::thread, when compiled with clang, "pure virtual method called""
href="show_bug.cgi?id=12730#c13">http://llvm.org/bugs/show_bug.cgi?id=12730#c13</a>.
Niall</pre>
</div>
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