"Undefined symbols for architecture x86_64" 试图包含来自另一个文件的函数

Question

我正在尝试在另一个程序 event_rate.cpp 中包含一个名为 kinematicfactor 的函数，它是用 kinematic_factor.cpp 编写的。

kinematic_factor.cpp:

#include "kinematic_factor.hpp"

double kinematicfactor (double md) {
    double mt = 17.6924; // Mass of Fluorine [GeV/c^2]
    double r = 4*mt*md/pow(mt+md, 2);
    return r;
}

kinematic_factor.hpp:

#ifndef kinematic_factor_hpp
#define kinematic_factor_hpp

double kinematicfactor (double md);

#endif /* kinematic_factor_hpp */

event_rate:

#include "event_rate.hpp"
#include "kinematic_factor.hpp"

#include <iostream>
#include <cmath>

using namespace std;

int main() {
    cout << kinematic_factor(1.0) << endl;
}

据我所知，这是我应该做的，但我收到一个错误：

Undefined symbols for architecture x86_64:
  "kinematicfactor(double)", referenced from:
      _main in event_rate-1d17f7.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我做错了什么？

编辑：我试过了

#include "kinematic_factor.cpp"

它奏效了。但是我听说包含 cpp 文件（而不是头文件）对学习者来说是一种不好的做法...我该怎么办？

Answer 1

你是怎么编译这个程序的，我能正确编译同样的程序。我怀疑这应该是 linking 问题。

需要编译源码一起编译和link.

g++ kinematic_factor.cpp event_rate.cpp -o event_rate

"Undefined symbols for architecture x86_64" 试图包含来自另一个文件的函数

"Undefined symbols for architecture x86_64" trying to include function from another file

c++

function

include

clang

undefined-symbol