Clion 未定义的建筑符号 x86_64

Question

我的代码已按预期在 CodeLite 中编译并运行。然后我尝试在 Clion 中运行相同的代码，但它给了我这个错误：

Scanning dependencies of target leastSquareFitting
[ 50%] Building CXX object CMakeFiles/leastSquareFitting.dir/main.cpp.o
[100%] Linking CXX executable leastSquareFitting
Undefined symbols for architecture x86_64:
  "printMatrix(Matrix)", referenced from:
      _main in main.cpp.o
  "constructMatrix(int, std::__1::vector<double, 
std::__1::allocator<double> >)", referenced from:
      _main in main.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see 
invocation)
make[3]: *** [leastSquareFitting] Error 1
make[2]: *** [CMakeFiles/leastSquareFitting.dir/all] Error 2
make[1]: *** [CMakeFiles/leastSquareFitting.dir/rule] Error 2
make: *** [leastSquareFitting] Error 2

我试图在网上搜索这个错误，但根据我的发现无法解决。这是我的代码：

main.cpp

#include "fullMatrix.h"
#include <cstdio>
#include <iostream>
#include <vector>
using namespace std;
int main()
{
    vector<double> value = {1.0,2.0,3.0,4.0};
    Matrix m = constructMatrix(2, value);
    printMatrix(m);
    return 0;
}

fullMatrix.cpp

#include "fullMatrix.h"
#include <iostream>
#include <vector>
#include "cmath"
#include <cstdio>
using namespace std;


Matrix constructMatrix(int size, vector<double> x) {
    //initiate variables of a matrix
    Matrix myMatrix;
    myMatrix.size = size;
    myMatrix.value = x;
    return myMatrix;
}

void printMatrix(Matrix matrix){
    // Loop through rows and columns to display all values
    for (int row = 0; row < matrix.size; row++) {
        for (int col = 0; col < matrix.size; col++) {
            cout <<matrix.value[col+row*matrix.size] << " ";
        }
        cout << endl;
    }
}

fullMatrix.h

#ifndef fullMatrix_h
#define fullMatrix_h
#include <vector>
using namespace std;

struct Matrix
{
    int size;
    vector<double> value;
};
Matrix constructMatrix(int size, vector<double> x);

void printMatrix(Matrix matrix);

#endif

我是 CMake 的新手，这就是 CMakeLists.txt:

cmake_minimum_required(VERSION 3.10)
project(leastSquareFitting)

set(CMAKE_CXX_STANDARD 11)

add_executable(leastSquareFitting main.cpp)

谢谢！感谢您的帮助！

Answer 1

将 CMakeLists 的最后一行更改为：

add_executable(leastSquareFitting main.cpp fullMatrix.cpp)

链接器告诉您的是它找不到包含函数 printMatrix 的已编译文件，如果您查看 cmake 的输出，您会看到 cmake 仅在编译 main.cpp 但有没有提到 fullMatrix.cpp:

Building CXX object CMakeFiles/leastSquareFitting.dir/main.cpp.o

它没有提到另一个文件的原因是你没有告诉它那个文件也是你的来源的一部分。

Clion 未定义的建筑符号 x86_64

Clion Undefined symbols for architecture x86_64

c++

cmake

clion