[LLVMdev] Question about linking llvm-mc when porting a new backend

Lu Mitnick king19880326 at gmail.com
Sat May 7 04:48:29 PDT 2011 

Hello all,

I am a LLVM newer who want to add a new backend(EBC) into LLVM. After coping
the related
files from another target and modifying it, I meet a problem when I build
the project. The
error message is as follows:

================================================================
[ 94%] Built target llvm-dis
Linking CXX executable ../../bin/llvm-mc
Undefined symbols:

"llvm::TargetRegisterInfo::getInitialFrameState(std::vector<llvm::MachineMove,
std::allocator<llvm::MachineMove> >&) const", referenced from:
      vtable for llvm::EBCRegisterInfoin
libLLVMEBCCodeGen.a(EBCRegisterInfo.cpp.o)
      vtable for llvm::EBCGenRegisterInfoin
libLLVMEBCCodeGen.a(EBCRegisterInfo.cpp.o)
  "llvm::TargetMachine::getAsmVerbosityDefault()", referenced from:
      getVerboseAsm()     in libLLVMCodeGen.a(LLVMTargetMachine.cpp.o)
  "llvm::TargetData::getPrefTypeAlignment(llvm::Type const*) const",
referenced from:
      llvm::SelectionDAG::getConstantPool(llvm::MachineConstantPoolValue*,
llvm::EVT, unsigned int, int, bool, unsigned char)in
libLLVMSelectionDAG.a(SelectionDAG.cpp.o)
      llvm::SelectionDAG::getConstantPool(llvm::Constant const*, llvm::EVT,
unsigned int, int, bool, unsigned char)in
libLLVMSelectionDAG.a(SelectionDAG.cpp.o)
      llvm::SelectionDAG::CreateStackTemporary(llvm::EVT, llvm::EVT)in
libLLVMSelectionDAG.a(SelectionDAG.cpp.o)
      llvm::SelectionDAG::CreateStackTemporary(llvm::EVT, llvm::EVT)in
libLLVMSelectionDAG.a(SelectionDAG.cpp.o)
      llvm::SelectionDAG::CreateStackTemporary(llvm::EVT, unsigned int)in
libLLVMSelectionDAG.a(SelectionDAG.cpp.o)
      llvm::SelectionDAGBuilder::visitInlineAsm(llvm::ImmutableCallSite)
in libLLVMSelectionDAG.a(SelectionDAGBuilder.cpp.o)
      llvm::SelectionDAGBuilder::LowerCallTo(llvm::ImmutableCallSite,
llvm::SDValue, bool, llvm::MachineBasicBlock*)in
libLLVMSelectionDAG.a(SelectionDAGBuilder.cpp.o)
      llvm::SelectionDAGBuilder::visitAlloca(llvm::AllocaInst const&)in
libLLVMSelectionDAG.a(SelectionDAGBuilder.cpp.o)
      (anonymous namespace)::DAGCombiner::SimplifySelectCC(llvm::DebugLoc,
llvm::SDValue, llvm::SDValue, llvm::SDValue, llvm::SDValue,
llvm::ISD::CondCode, bool)
            in libLLVMSelectionDAG.a(DAGCombiner.cpp.o)
      llvm::FunctionLoweringInfo::set(llvm::Function const&,
llvm::MachineFunction&)in libLLVMSelectionDAG.a(FunctionLoweringInfo.cpp.o)
      llvm::ComputeMaskedBits(llvm::Value*, llvm::APInt const&,
llvm::APInt&, llvm::APInt&, llvm::TargetData const*, unsigned int)in
libLLVMAnalysis.a(ValueTracking.cpp.o)
      (anonymous
namespace)::SelectionDAGLegalize::EmitStackConvert(llvm::SDValue, llvm::EVT,
llvm::EVT, llvm::DebugLoc)
                                              in
libLLVMSelectionDAG.a(LegalizeDAG.cpp.o)
      (anonymous
namespace)::SelectionDAGLegalize::EmitStackConvert(llvm::SDValue, llvm::EVT,
llvm::EVT, llvm::DebugLoc)
                                              in
libLLVMSelectionDAG.a(LegalizeDAG.cpp.o)
      llvm::isSafeToLoadUnconditionally(llvm::Value*, llvm::Instruction*,
unsigned int, llvm::TargetData const*)in libLLVMAnalysis.a(Loads.cpp.o)
      llvm::DAGTypeLegalizer::SplitVecRes_INSERT_VECTOR_ELT(llvm::SDNode*,
llvm::SDValue&, llvm::SDValue&)in
libLLVMSelectionDAG.a(LegalizeVectorTypes.cpp.o)
      llvm::InstrEmitter::AddOperand(llvm::MachineInstr*, llvm::SDValue,
unsigned int, llvm::TargetInstrDesc const*, llvm::DenseMap<llvm::SDValue,
unsigned int, llvm::DenseMapInfo<llvm::SDValue>, llvm::DenseMapInfo<unsigned
int> >&, bool, bool, bool)in libLLVMSelectionDAG.a(InstrEmitter.cpp.o)
      llvm::DAGTypeLegalizer::ExpandRes_BIT_CONVERT(llvm::SDNode*,
llvm::SDValue&, llvm::SDValue&)in
libLLVMSelectionDAG.a(LegalizeTypesGeneric.cpp.o)
  "llvm::TargetSubtarget::enablePostRAScheduler(llvm::CodeGenOpt::Level,
llvm::TargetSubtarget::AntiDepBreakMode&,
llvm::SmallVectorImpl<llvm::TargetRegisterClass*>&) const", referenced from:
      vtable for llvm::EBCSubtargetin
libLLVMEBCCodeGen.a(EBCTargetMachine.cpp.o)
      vtable for llvm::EBCSubtargetin
libLLVMEBCCodeGen.a(EBCSubtarget.cpp.o)
  "llvm::DisableFramePointerElim(llvm::MachineFunction const&)", referenced
from:
      llvm::DwarfDebug::endFunction(llvm::MachineFunction const*)in
libLLVMAsmPrinter.a(DwarfDebug.cpp.o)
  "typeinfo for llvm::TargetLoweringObjectFile", referenced from:
      typeinfo for llvm::TargetLoweringObjectFileELFin
libLLVMCodeGen.a(TargetLoweringObjectFileImpl.cpp.o)
      typeinfo for llvm::TargetLoweringObjectFileMachOin
libLLVMCodeGen.a(TargetLoweringObjectFileImpl.cpp.o)
      typeinfo for llvm::TargetLoweringObjectFileCOFFin
libLLVMCodeGen.a(TargetLoweringObjectFileImpl.cpp.o)
  "llvm::GuaranteedTailCallOpt", referenced from:
      __ZN4llvm21GuaranteedTailCallOptE$non_lazy_ptr in
libLLVMCodeGen.a(Analysis.cpp.o)
  "llvm::TargetLoweringObjectFile::SectionForGlobal(llvm::GlobalValue
const*, llvm::SectionKind, llvm::Mangler*, llvm::TargetMachine const&)
const", referenced from:
      llvm::AsmPrinter::EmitGlobalVariable(llvm::GlobalVariable const*)in
libLLVMAsmPrinter.a(AsmPrinter.cpp.o)
      llvm::AsmPrinter::EmitGlobalVariable(llvm::GlobalVariable const*)in
libLLVMAsmPrinter.a(AsmPrinter.cpp.o)
      llvm::TargetLoweringObjectFile::SectionForGlobal(llvm::GlobalValue
const*, llvm::Mangler*, llvm::TargetMachine const&) constin
libLLVMAsmPrinter.a(AsmPrinter.cpp.o)
  "llvm::TargetLoweringObjectFile::TargetLoweringObjectFile()", referenced
from:
      llvm::TargetLoweringObjectFileCOFF::TargetLoweringObjectFileCOFF()in
libLLVMEBCCodeGen.a(EBCISelLowering.cpp.o)
  "llvm::TargetLoweringObjectFile::~TargetLoweringObjectFile()", referenced
from:
      llvm::TargetLoweringObjectFileELF::~TargetLoweringObjectFileELF()in
libLLVMCodeGen.a(TargetLoweringObjectFileImpl.cpp.o)
      llvm::TargetLoweringObjectFileELF::~TargetLoweringObjectFileELF()in
libLLVMCodeGen.a(TargetLoweringObjectFileImpl.cpp.o)

llvm::TargetLoweringObjectFileMachO::~TargetLoweringObjectFileMachO()in
libLLVMCodeGen.a(TargetLoweringObjectFileImpl.cpp.o)

llvm::TargetLoweringObjectFileMachO::~TargetLoweringObjectFileMachO()in
libLLVMCodeGen.a(TargetLoweringObjectFileImpl.cpp.o)
      llvm::TargetLoweringObjectFileCOFF::~TargetLoweringObjectFileCOFF()in
libLLVMCodeGen.a(TargetLoweringObjectFileImpl.cpp.o)
      llvm::TargetLoweringObjectFileCOFF::~TargetLoweringObjectFileCOFF()in
libLLVMCodeGen.a(TargetLoweringObjectFileImpl.cpp.o)
  "llvm::TargetData::getTypeSizeInBits(llvm::Type const*) const", referenced
from:
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMAsmPrinter.a(AsmPrinter.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMSelectionDAG.a(TargetLowering.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMCodeGen.a(MachineFunction.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMSelectionDAG.a(SelectionDAGBuilder.cpp.o)
      llvm::SDISelAsmOperandInfo::getCallOperandValEVT(llvm::LLVMContext&,
llvm::TargetLowering const&, llvm::TargetData const*) constin
libLLVMSelectionDAG.a(SelectionDAGBuilder.cpp.o)
      CanCoerceMustAliasedValueToLoad(llvm::Value*, llvm::Type const*,
llvm::TargetData const&)in libLLVMScalarOpts.a(GVN.cpp.o)
      CanCoerceMustAliasedValueToLoad(llvm::Value*, llvm::Type const*,
llvm::TargetData const&)in libLLVMScalarOpts.a(GVN.cpp.o)
      CoerceAvailableValueToLoadType(llvm::Value*, llvm::Type const*,
llvm::Instruction*, llvm::TargetData const&)in
libLLVMScalarOpts.a(GVN.cpp.o)
      GetStoreValueForLoad(llvm::Value*, unsigned int, llvm::Type const*,
llvm::Instruction*, llvm::TargetData const&)in
libLLVMScalarOpts.a(GVN.cpp.o)
      GetStoreValueForLoad(llvm::Value*, unsigned int, llvm::Type const*,
llvm::Instruction*, llvm::TargetData const&)in
libLLVMScalarOpts.a(GVN.cpp.o)
      GetMemInstValueForLoad(llvm::MemIntrinsic*, unsigned int, llvm::Type
const*, llvm::Instruction*, llvm::TargetData const&)in
libLLVMScalarOpts.a(GVN.cpp.o)
      AnalyzeLoadFromClobberingWrite(llvm::Type const*, llvm::Value*,
llvm::Value*, unsigned long long, llvm::TargetData const&)in
libLLVMScalarOpts.a(GVN.cpp.o)
      AnalyzeLoadFromClobberingStore(llvm::Type const*, llvm::Value*,
llvm::StoreInst*, llvm::TargetData const&)in libLLVMScalarOpts.a(GVN.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMScalarOpts.a(GVN.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMAnalysis.a(BasicAliasAnalysis.cpp.o)
      SymbolicallyEvaluateGEP(llvm::Constant* const*, unsigned int,
llvm::Type const*, llvm::TargetData const*)in
libLLVMAnalysis.a(ConstantFolding.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMAnalysis.a(ConstantFolding.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMSelectionDAG.a(DAGCombiner.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMAnalysis.a(AliasAnalysis.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMCodeGen.a(Analysis.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMCodeGen.a(StackProtector.cpp.o)
      llvm::ScalarEvolution::getTypeSizeInBits(llvm::Type const*) constin
libLLVMAnalysis.a(ScalarEvolution.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMAnalysis.a(ScalarEvolution.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMSelectionDAG.a(FastISel.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMAnalysis.a(MemoryBuiltins.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMSelectionDAG.a(FunctionLoweringInfo.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMTransformUtils.a(AddrModeMatcher.cpp.o)
      llvm::ComputeMaskedBits(llvm::Value*, llvm::APInt const&,
llvm::APInt&, llvm::APInt&, llvm::TargetData const*, unsigned int)in
libLLVMAnalysis.a(ValueTracking.cpp.o)
      llvm::ComputeMaskedBits(llvm::Value*, llvm::APInt const&,
llvm::APInt&, llvm::APInt&, llvm::TargetData const*, unsigned int)in
libLLVMAnalysis.a(ValueTracking.cpp.o)
      llvm::ComputeNumSignBits(llvm::Value*, llvm::TargetData const*,
unsigned int)in libLLVMAnalysis.a(ValueTracking.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMAnalysis.a(ValueTracking.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMSelectionDAG.a(LegalizeDAG.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMAnalysis.a(Loads.cpp.o)
      llvm::TargetData::getTypeStoreSize(llvm::Type const*) constin
libLLVMSelectionDAG.a(InstrEmitter.cpp.o)

.
.
.

ld: symbol(s) not found
collect2: ld returned 1 exit status
make[2]: *** [bin/llvm-mc] Error 1
make[1]: *** [tools/llvm-mc/CMakeFiles/llvm-mc.dir/all] Error 2
make: *** [all] Error 2

================================================================

I just modify files in lib/Target/EBC/ and Triple.h/Triple.cpp. However
there is some error
message about building LLVM core. Would someone mind to tell me how could I
solve this
problem??

Thanks a lot

Yi-Hong
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