架构x86_64的不确定符号

Question

我的代码编译并按照Codelite的预期运行。然后，我尝试在Clion中运行相同的代码，但是它给了我这个错误：

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

我试图在线搜索此错误，但无法根据发现的问题来解决它。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

我对Cmake非常陌生，这就是Cmakelists中的内容：

cmake_minimum_required(VERSION 3.10)
project(leastSquareFitting)
set(CMAKE_CXX_STANDARD 11)
add_executable(leastSquareFitting main.cpp)

谢谢！任何帮助都将不胜感激！

Answer 1

将您的cmakelists的最后一行更改为：

add_executable(leastSquareFitting main.cpp fullMatrix.cpp)

链接器告诉您的内容是找不到包含函数printMatrix的编译文件，如果您查看CMAKE的输出，您会看到CMAKE仅编译Main.cpp。/p>

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

它没有提及另一个文件的原因是您没有告诉它文件也是您的来源的一部分。