http://llvm.org/bugs/show_bug.cgi?id=6523
Summary: Externally visible global gets wrong name
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: enhancement
Priority: P5
Component: C++
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
If I build LLVM with g++ and dragonegg with clang++ then I get a link failure
because g++ and clang++ disagree over some symbol names:
$ clang++ -S -O2 llvm-backend.ii -o - | grep Registry
movq $createLinearScanRegisterAllocator, Registry(%rip)
$ g++ -S -O2 llvm-backend.ii -o - | grep Registry
movq $_ZN4llvm33createLinearScanRegisterAllocatorEv,
_ZN4llvm16RegisterRegAlloc8RegistryE(%rip)
Reduced testcase follows:
namespace std __attribute__ ((__visibility__ ("default"))) {
# 202 "/usr/local/include/llvm/OperandTraits.h" 3 4
}
namespace llvm {
class Pass {
};
class FunctionPass : public Pass {
};
FunctionPass *createLinearScanRegisterAllocator();
typedef void *(*MachinePassCtor)();
class MachinePassRegistryNode {
};
class MachinePassRegistry {
MachinePassCtor Default;
public:
MachinePassRegistryNode *getList() {
}
void setDefault(MachinePassCtor C) {
Default = C;
}
};
class RegisterRegAlloc : public MachinePassRegistryNode {
public:
typedef FunctionPass *(*FunctionPassCtor)();
static MachinePassRegistry Registry;
static void setDefault(FunctionPassCtor C) {
Registry.setDefault((MachinePassCtor)C);
}
};
}
void LazilyInitializeModule(void) {
llvm::RegisterRegAlloc::setDefault(llvm::createLinearScanRegisterAllocator);
}
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