构建LLVM示例：体系结构x86_64的未定义符号 [英] build LLVM example: Undefined symbols for architecture x86_64

问题描述

我已经在笔记本电脑上安装了LLVM，但是在 llvm / examples / Fibonacci 中编译 Fibonacci 示例时遇到问题：

I've installed LLVM on my laptop but having problem compiling the Fibonacci example in llvm/examples/Fibonacci:

clang ++ -std = c ++ 11 -I ../../include fibonacci.cpp -o fib

clang++ -std=c++11 -I ../../include fibonacci.cpp -o fib

/usr/local/include/llvm/Support/DataTypes.h:57:3: error: "Must #define __STDC_LIMIT_MACROS before #including Support/DataTypes.h"

根据这个问题，我添加了一些驱动程序标志：

According to this question, I add some driver flags:

clang ++ fibonacci .cpp -std = c ++ 11 -I ../../include -o fib -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS

clang++ fibonacci.cpp -std=c++11 -I ../../include -o fib -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS

产生的不同错误：

Undefined symbols for architecture x86_64:
  "_LLVMInitializeX86Target", referenced from:
      llvm::InitializeNativeTarget() in fibonacci-1b0cd0.o
  "_LLVMInitializeX86TargetInfo", referenced from:
      llvm::InitializeNativeTarget() in fibonacci-1b0cd0.o
  "_LLVMInitializeX86TargetMC", referenced from:
      llvm::InitializeNativeTarget() in fibonacci-1b0cd0.o
  "_LLVMLinkInInterpreter", referenced from:
      (anonymous namespace)::ForceInterpreterLinking::ForceInterpreterLinking() in fibonacci-1b0cd0.o
  "llvm::BasicBlock::BasicBlock(llvm::LLVMContext&, llvm::Twine const&, llvm::Function*, llvm::BasicBlock*)", referenced from:
      llvm::BasicBlock::Create(llvm::LLVMContext&, llvm::Twine const&, llvm::Function*, llvm::BasicBlock*) in fibonacci-1b0cd0.o
  "llvm::BranchInst::BranchInst(llvm::BasicBlock*, llvm::BasicBlock*, llvm::Value*, llvm::BasicBlock*)", referenced from:
      llvm::BranchInst::Create(llvm::BasicBlock*, llvm::BasicBlock*, llvm::Value*, llvm::BasicBlock*) in fibonacci-1b0cd0.o
  "llvm::ReturnInst::ReturnInst(llvm::LLVMContext&, llvm::Value*, llvm::BasicBlock*)", referenced from:
      llvm::ReturnInst::Create(llvm::LLVMContext&, llvm::Value*, llvm::BasicBlock*) in fibonacci-1b0cd0.o
  "llvm::VectorType::get(llvm::Type*, unsigned int)", referenced from:
      llvm::CmpInst::makeCmpResultType(llvm::Type*) in fibonacci-1b0cd0.o
  "llvm::ConstantInt::get(llvm::IntegerType*, unsigned long long, bool)", referenced from:
      CreateFibFunction(llvm::Module*, llvm::LLVMContext&) in fibonacci-1b0cd0.o
  "llvm::Instruction::Instruction(llvm::Type*, unsigned int, llvm::Use*, unsigned int, llvm::BasicBlock*)", referenced from:
      llvm::CallInst::CallInst(llvm::Value*, llvm::ArrayRef<llvm::Value*>, llvm::ArrayRef<llvm::OperandBundleDefT<llvm::Value*> >, llvm::Twine const&, llvm::BasicBlock*) in fibonacci-1b0cd0.o
  "llvm::Instruction::~Instruction()", referenced from:
      llvm::CmpInst::~CmpInst() in fibonacci-1b0cd0.o
      llvm::CallInst::CallInst(llvm::Value*, llvm::ArrayRef<llvm::Value*>, llvm::ArrayRef<llvm::OperandBundleDefT<llvm::Value*> >, llvm::Twine const&, llvm::BasicBlock*) in fibonacci-1b0cd0.o
  "llvm::LLVMContext::LLVMContext()", referenced from:
      _main in fibonacci-1b0cd0.o
  "llvm::LLVMContext::~LLVMContext()", referenced from:
      _main in fibonacci-1b0cd0.o
  "llvm::raw_ostream::write(char const*, unsigned long)", referenced from:
      llvm::raw_ostream::operator<<(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in fibonacci-1b0cd0.o
      llvm::raw_ostream::operator<<(llvm::StringRef) in fibonacci-1b0cd0.o
  "llvm::raw_ostream::operator<<(long)", referenced from:
      llvm::raw_ostream::operator<<(int) in fibonacci-1b0cd0.o
  "llvm::verifyModule(llvm::Module const&, llvm::raw_ostream*)", referenced from:
      _main in fibonacci-1b0cd0.o
  "llvm::EngineBuilder::selectTarget()", referenced from:
      llvm::EngineBuilder::create() in fibonacci-1b0cd0.o
  "llvm::EngineBuilder::create(llvm::TargetMachine*)", referenced from:
      llvm::EngineBuilder::create() in fibonacci-1b0cd0.o
  "llvm::EngineBuilder::EngineBuilder(std::__1::unique_ptr<llvm::Module, std::__1::default_delete<llvm::Module> >)", referenced from:
      _main in fibonacci-1b0cd0.o
  "llvm::EngineBuilder::~EngineBuilder()", referenced from:
      _main in fibonacci-1b0cd0.o
  "llvm::BinaryOperator::Create(llvm::Instruction::BinaryOps, llvm::Value*, llvm::Value*, llvm::Twine const&, llvm::BasicBlock*)", referenced from:
      llvm::BinaryOperator::CreateSub(llvm::Value*, llvm::Value*, llvm::Twine const&, llvm::BasicBlock*) in fibonacci-1b0cd0.o
      llvm::BinaryOperator::CreateAdd(llvm::Value*, llvm::Value*, llvm::Twine const&, llvm::BasicBlock*) in fibonacci-1b0cd0.o
  "llvm::llvm_unreachable_internal(char const*, char const*, unsigned int)", referenced from:
      llvm::User::operator delete(void*, unsigned int) in fibonacci-1b0cd0.o
  "llvm::Type::getInt32Ty(llvm::LLVMContext&)", referenced from:
      CreateFibFunction(llvm::Module*, llvm::LLVMContext&) in fibonacci-1b0cd0.o
  "llvm::Type::getInt1Ty(llvm::LLVMContext&)", referenced from:
      llvm::CmpInst::makeCmpResultType(llvm::Type*) in fibonacci-1b0cd0.o
  "llvm::User::operator delete(void*)", referenced from:
      CreateFibFunction(llvm::Module*, llvm::LLVMContext&) in fibonacci-1b0cd0.o
      llvm::ICmpInst::~ICmpInst() in fibonacci-1b0cd0.o
     (maybe you meant: __ZN4llvm4UserdlEPvj)
  "llvm::User::operator new(unsigned long, unsigned int)", referenced from:
      llvm::CmpInst::operator new(unsigned long) in fibonacci-1b0cd0.o
      llvm::BranchInst::Create(llvm::BasicBlock*, llvm::BasicBlock*, llvm::Value*, llvm::BasicBlock*) in fibonacci-1b0cd0.o
      llvm::ReturnInst::Create(llvm::LLVMContext&, llvm::Value*, llvm::BasicBlock*) in fibonacci-1b0cd0.o
      llvm::CallInst::Create(llvm::Value*, llvm::ArrayRef<llvm::Value*>, llvm::Twine const&, llvm::BasicBlock*) in fibonacci-1b0cd0.o
  "llvm::errs()", referenced from:
      _main in fibonacci-1b0cd0.o
  "llvm::outs()", referenced from:
      _main in fibonacci-1b0cd0.o
  "llvm::APInt::initSlowCase(unsigned int, unsigned long long, bool)", referenced from:
      llvm::APInt::APInt(unsigned int, unsigned long long, bool) in fibonacci-1b0cd0.o
  "llvm::Value::setName(llvm::Twine const&)", referenced from:
      CreateFibFunction(llvm::Module*, llvm::LLVMContext&) in fibonacci-1b0cd0.o
  "llvm::Module::getOrInsertFunction(llvm::StringRef, llvm::Type*, ...)", referenced from:
      CreateFibFunction(llvm::Module*, llvm::LLVMContext&) in fibonacci-1b0cd0.o
  "llvm::Module::Module(llvm::StringRef, llvm::LLVMContext&)", referenced from:
      _main in fibonacci-1b0cd0.o
  "llvm::Module::~Module()", referenced from:
      _main in fibonacci-1b0cd0.o
  "llvm::CmpInst::anchor()", referenced from:
      vtable for llvm::ICmpInst in fibonacci-1b0cd0.o
  "llvm::CmpInst::CmpInst(llvm::Type*, llvm::Instruction::OtherOps, unsigned short, llvm::Value*, llvm::Value*, llvm::Twine const&, llvm::BasicBlock*)", referenced from:
      llvm::ICmpInst::ICmpInst(llvm::BasicBlock&, llvm::CmpInst::Predicate, llvm::Value*, llvm::Value*, llvm::Twine const&) in fibonacci-1b0cd0.o
  "llvm::CallInst::init(llvm::FunctionType*, llvm::Value*, llvm::ArrayRef<llvm::Value*>, llvm::ArrayRef<llvm::OperandBundleDefT<llvm::Value*> >, llvm::Twine const&)", referenced from:
      llvm::CallInst::init(llvm::Value*, llvm::ArrayRef<llvm::Value*>, llvm::ArrayRef<llvm::OperandBundleDefT<llvm::Value*> >, llvm::Twine const&) in fibonacci-1b0cd0.o
  "llvm::Type::getScalarType() const", referenced from:
      llvm::Type::isIntOrIntVectorTy() const in fibonacci-1b0cd0.o
      llvm::Type::isPtrOrPtrVectorTy() const in fibonacci-1b0cd0.o
  "llvm::APInt::print(llvm::raw_ostream&, bool) const", referenced from:
      llvm::operator<<(llvm::raw_ostream&, llvm::APInt const&) in fibonacci-1b0cd0.o
  "llvm::Module::print(llvm::raw_ostream&, llvm::AssemblyAnnotationWriter*, bool, bool) const", referenced from:
      llvm::operator<<(llvm::raw_ostream&, llvm::Module const&) in fibonacci-1b0cd0.o
  "llvm::Function::BuildLazyArguments() const", referenced from:
      llvm::Function::CheckLazyArguments() const in fibonacci-1b0cd0.o
  "typeinfo for llvm::CmpInst", referenced from:
      typeinfo for llvm::ICmpInst in fibonacci-1b0cd0.o
  "vtable for llvm::CallInst", referenced from:
      llvm::CallInst::CallInst(llvm::Value*, llvm::ArrayRef<llvm::Value*>, llvm::ArrayRef<llvm::OperandBundleDefT<llvm::Value*> >, llvm::Twine const&, llvm::BasicBlock*) in fibonacci-1b0cd0.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
ld: symbol(s) not found for architecture x86_64
clang-3.8: error: linker command failed with exit code 1 (use -v to see invocation)

我一直在搜索并找到类似问题。另一个镜头：

I keep searching and find a similar question. Another shot:

clang ++ -g -O3 fibonacci.cpp llvm-config --cxxflags --ldflags --system-libs- -libs核心 -o fib

更短的错误：

Undefined symbols for architecture x86_64:
  "_LLVMInitializeX86Target", referenced from:
      _main in fibonacci-21f462.o
  "_LLVMInitializeX86TargetInfo", referenced from:
      _main in fibonacci-21f462.o
  "_LLVMInitializeX86TargetMC", referenced from:
      _main in fibonacci-21f462.o
  "_LLVMLinkInInterpreter", referenced from:
      __GLOBAL__sub_I_fibonacci.cpp in fibonacci-21f462.o
  "llvm::EngineBuilder::selectTarget()", referenced from:
      _main in fibonacci-21f462.o
  "llvm::EngineBuilder::create(llvm::TargetMachine*)", referenced from:
      _main in fibonacci-21f462.o
  "llvm::EngineBuilder::EngineBuilder(std::__1::unique_ptr<llvm::Module, std::__1::default_delete<llvm::Module> >)", referenced from:
      _main in fibonacci-21f462.o
  "llvm::EngineBuilder::~EngineBuilder()", referenced from:
      _main in fibonacci-21f462.o
ld: symbol(s) not found for architecture x86_64
clang-3.8: error: linker command failed with exit code 1 (use -v to see invocation)

由CMake自动生成的 llvm / build / bin 可执行文件很好，这可能证明工具链正在工作。

The executables of llvm/build/bin generated by CMake auto-build are good, which might prove the tool chain is working.

但是我仍然想进入代码并观察。

But I still want to go into the code and observe.

有人可以帮我吗？

LLVM version 3.8.0svn
Default target: x86_64-apple-darwin15.0.0
Host CPU: has well

clang version 3.8.0 
Target: x86_64-apple-darwin15.0.0
Thread model: posix

---

更新：

---

update:

我构建了什么都不做的 a-test.cpp ：

I build a do-nothing a-test.cpp:

#include "llvm/IR/Verifier.h"
#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/ExecutionEngine/Interpreter.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/raw_ostream.h"

int main(int argc, char const *argv[])
{
    printf("hello world\n");
    return 0;
}

并成功编译：

clang ++ -g -O3 -std = c ++ 11 a-test.cpp llvm-config --cppflags --ldflags --system-libs --libs核心执行引擎解释器mc支持nativecodegen -o测试

。/a测试

hello world

但对于 fibonacci.cpp ：

clang ++ -g -O3 -std = c ++ 11 fibonacci.cpp llvm-config --cppflags- ldflags --system-libs --libs核心执行引擎解释器mc支持nativecodegen -o fib

Undefined symbols for architecture x86_64:
  "typeinfo for llvm::CmpInst", referenced from:
      typeinfo for llvm::ICmpInst in fibonacci-009ddf.o
ld: symbol(s) not found for architecture x86_64
clang-3.8: error: linker command failed with exit code 1 (use -v to see invocation)

推荐答案

如果您查看构建Fibonacci的CMakeFile，您会发现它不仅需要Core库。

If you look in the CMakeFile that builds Fibonacci, you'll see that it requires more than just the Core library.

需要 Core ， ExecutionEngine ，解释器， MC ，支持，本地代码。正确的-libs 行应为-libs核心执行引擎解释器mc support nativecodegen

It requires Core, ExecutionEngine, Interpreter, MC, Support, nativecodege. The correct --libs line would be --libs core executionengine interpreter mc support nativecodegen

您要查找的文件是 build.ninja 。如果您在其中搜索Fibonacci，您将获得所需的所有信息。

The file you're looking for is build.ninja. If you search in there for Fibonacci, you'll in all the information you need.

编辑：由于OP在这里苦苦挣扎，因此我将

clang++ -g -O3 -std=c++11 -fno-exceptions -fno-rtti fibonacci.cpp `llvm-config --cppflags --ldflags --system-libs --libs core executionengine interpreter mc support nativecodegen` -o fib

使用 llvm-config --ldflags --libs 通常更容易，而不用担心需要使用哪个子集好吧，但是，嗯。

It's generally easier to use llvm-config --ldflags --libs rather than worrying about exactly which subset you need as well, but meh.

反正这不是正确的方法，请使用构建系统！

This is not the right way do this anyway, use the build system!

这篇关于构建LLVM示例：体系结构x86_64的未定义符号的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！