Ошибка компоновщика C++ OSX Mavericks

Question

У меня проблемы с компоновщиком g ++. Мой код выглядит следующим образом:

prog3.cpp

#include "linkedlist.h" 
#include <iostream> 
#include <fstream> 
#include <string> 
#include <vector> 
#include <iomanip> 

using namespace std; 

bool readFile(const char* file, linkedlist &l); 

int main(int argc, char **argv) 
{ 
int i = 0, j = 0; //Incrementers 
linkedlist dictionary; 
string word; 
ifstream fin; 

if(argc != 3) 
{ 
    //give the user an error and exit 
} 

if(!readFile("dictionary_short.txt", dictionary)) 
{ 
    //give the user an error and exit 
} 
dictionary.printToCommandline(); 

return 0; 
} 

bool readFile(const char* file, linkedlist &l) 
{ 
string tmp; 

ifstream fin; 
fin.open(file, ios::in); 
if(fin.is_open()) 
{ 
    //Read the file 
    while(!fin.eof()) 
    { 
     fin >> tmp; 
     l.insert(tmp); 
    } 

    //close the file and return the array 
    fin.close(); 

    return true; 
} 
return false; 
} 

linkedlist.h

class linkedlist 
{ 
public: 
    /*! 
    * @brief Constructor for the linked list 
    */ 
    linkedlist(); 
    /*! 
    * @brief Deconstructor for the linked list 
    */ 
    ~linkedlist(); 

    /*! 
    * @brief inserts a word into the linked list. Returns true if sucessful. 
    */ 
    bool insert(string str); 
    /*! 
    * @brief removes a word from the linked list. Returns true if successful 
    */ 
    bool remove(string str); 
    /*! 
    * @brief finds a word in the linked list. Returns true if sucessful 
    */ 
    bool find(string str); 
    /*! 
    * @brief Increases the frequency count of a word. Returns true if sucessful 
    */ 
    bool incrementFrequency(string str); 
    /*! 
    * @brief Returns true if a node is empty. 
    */ 
    bool isEmpty(); 
    /*! 
    * @brief Returns the manimum frequency of a word from the linked list. 
    */ 
    int getMaxFrequency(); 
    /*! 
    * @brief Returns the number of nodes in the list. 
    */ 
    int size(); 
    /*! 
    * @brief Outputs the list into a file formatted correctly. 
    */ 
    void printToFile(ostream &out); 
    /*! 
    * @brief Outputs the list to the command line in alphabetical order 
    */ 
    void printToCommandline(); 

private: 
    /*! 
    * @brief Structure for a node. Keeps track of the frequency for the word. 
    * Stores the word. Also keeps a pointer to the next word in the list. 
    */ 
    struct node 
    { 
     int frequencyCount; 
     string word; 
     node *next; 
    }; 
    node *headptr; 
}; 

linkedlist.cpp

#include "linkedlist.h" 


linkedlist::linkedlist() 
{ 
headptr = nullptr; 
} 

linkedlist::~linkedlist() 
{ 
    //Function Implementation 
} 

bool linkedlist::insert(string str) 
{ 
    //Function Implementation 
} 

bool linkedlist::remove(string str) 
{ 
    //Function Implementation 
} 

bool linkedlist::find(string str) 
{ 
    //Function Implementation 
} 

bool linkedlist::incrementFrequency(string str) 
{ 
    //Function Implementation 
} 

bool linkedlist::isEmpty() 
{ 
    //Function Implementation 
} 

int linkedlist::getMaxFrequency() 
{ 
    //Function Implementation 
} 

int linkedlist::size() 
{ 
    //Function Implementation 
} 

void linkedlist::printToFile(ostream &out) 
{ 
    //Function Implementation 
} 

void linkedlist::printToCommandline() 
{ 
    //Function Implementation 
} 

ошибка я получаю, когда я компилирую (с использованием g ++ в Mac OS X 10.9.2):

Undefined symbols for architecture x86_64: 
"linkedlist::printToCommandline()", referenced from: 
_main in prog3-717fc0.o 
"linkedlist::insert(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)", referenced from: 
    readFile(char const*, linkedlist&) in prog3-717fc0.o 
"linkedlist::linkedlist()", referenced from: 
    _main in prog3-717fc0.o 
"linkedlist::~linkedlist()", referenced from: 
    _main in prog3-717fc0.o 
ld: symbol(s) not found for architecture x86_64 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 
[Finished in 0.3s with exit code 1] 

Просто из любопытства я скопировал файлы в проект Xcode, и у меня не было никаких ошибок. Как я могу исправить эту проблему с компоновщиком?

Answer 1

Вам необходимо пройти linkedlist.o линкера к

g++ -c prog3.cpp 
g++ -c linkedlist.cpp 
g++ prog3.o linkedlist.o -o prog3 

или в одной команде:

g++ prog3.cpp linkedlist.cpp -o prog3