使用LLVM MAC OS X编译项目会导致链接器错误

问题描述

我用brew安装了LLVM

brew install llvm

在测试c ++文件中：

#include <llvm/IR/Value.h>
#include <llvm/IR/IRBuilder.h>

int main()
{
    llvm::LLVMContext context;
    llvm::Module *module = new llvm::Module("module",context);

    return 0;
}

Makefile：

BIN=main
SRC_FILES=main.cpp
FLAGS := $(shell llvm-config --cxxflags --ldflags --libs)

CC=/usr/local/opt/llvm/bin/clang
CXX=$(CC)++

all:
        $(CXX) $(FLAGS) -o $(BIN) $(SRC_FILES)

我运行make

它给了我这个错误：

Undefined symbols for architecture x86_64:
  "_del_curterm",referenced from:
      llvm::sys::Process::FileDescriptorHasColors(int) in libLLVMSupport.a(Process.cpp.o)
  "_set_curterm",referenced from:
      llvm::sys::Process::FileDescriptorHasColors(int) in libLLVMSupport.a(Process.cpp.o)
  "_setupterm",referenced from:
      llvm::sys::Process::FileDescriptorHasColors(int) in libLLVMSupport.a(Process.cpp.o)
  "_tigetnum",referenced from:
      llvm::sys::Process::FileDescriptorHasColors(int) in libLLVMSupport.a(Process.cpp.o)
ld: symbol(s) not found for architecture x86_64
clang-10: error: linker command Failed with exit code 1 (use -v to see invocation)
make: *** [all] Error 1

我在做什么错了？

解决方法

我最终在class Entity { public: int x; Entity() {} Entity(int y) : x(y) {} }; int main() { Entity* e = new Entity(1); vector<Entity*> vec1; vector<Entity*> vec2; vec1.push_back(e); vec2.push_back(e); vec1[0]->x = 5; cout << vec2[0]->x << endl; return 0; } 命令中需要使用--system-libs作为标志：

llvm-config