https://llvm.org/bugs/show_bug.cgi?id=23428
Bug ID: 23428
Summary: Aarch64: libstdc++ std::thread, when compiled with
clang, "pure virtual method called"
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
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,
--
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