“架构x86_64的未定义符号”试图包含来自另一个文件的函数

时间:2015-10-28 03:01:16

标签: c++ function include clang undefined-symbol

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,该函数用kinematic_factor.cpp编写。

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,这就是我应该这样做的,但是我收到了一个错误:

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

#include "kinematic_factor.cpp"

它有效。但我听说包含cpp文件(而不是头文件)对于学习者来说是一种不好的做法......我该怎么办?

1 个答案:

答案 0 :(得分:0)

你是如何编译这个程序的,我能够正确地编译相同的程序。我怀疑它应该是链接问题。

您需要一起编译源代码以进行编译和链接。

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