error: ld returned 1 exit status
Sep 20, 2014 at 10:02pm UTC
I'm using Ubuntu 14.04 and gcc 4.8.2. I'm trying to compile the following code using this command:
g++ -Wall -W -std=c++11 game.cpp -o game
I'm getting the following error:
game.cpp:(.text+0x24): undefined reference to 'GameLoop::WelcomePlayer(sPlayer&)'
game.cpp:(.text+0x2f): undefined reference to 'GameLoop::RunGame()'
collect2: error: ld returned 1 exit status
Here is the part of my code where I'm assuming my error is:
game.cpp
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//#include "stdafx.h"
#include "Player.h"
#include "GameLoop.h"
int main(int argc, char * argv[])
{
sPlayer player;
GameLoop::WelcomePlayer(player);
bool bIsPlaying = true ;
while (bIsPlaying)
{
bIsPlaying = GameLoop::RunGame();
}
return 0;
}
GameLoop.cpp
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#include "GameLoop.h"
#include <iostream>
using namespace std;
namespace GameLoop
{
void WelcomePlayer(sPlayer& player)
{
cout<< "What name shall adorn your gravestone? " << endl;
cin>> player.m_name;
cout<< endl << "Greetings " << player.m_name << endl;
}
void GivePlayerOptions()
{
cout<< "What would you like to do? " << endl;
cout<< "1: Quit" << endl;
}
void GetPlayerInput(string& playerInput)
{
cin>> playerInput;
}
PlayerOptions EvaluateInput(string& playerInput)
{
PlayerOptions chosenOption = PlayerOptions::None;
if (playerInput.compare("1" ) == 0)
{
cout<< "You have chosen to quit!" << endl;
chosenOption = PlayerOptions::Quit;
}
else
{
cout<< "I do not recognize that option, try again." << endl;
}
return chosenOption;
}
bool RunGame()
{
bool bShouldEnd = false ;
GivePlayerOptions();
string playerInput;
GetPlayerInput(playerInput);
bShouldEnd = EvaluateInput(playerInput) == PlayerOptions::Quit;
return !bShouldEnd;
}
}
GameLoop.h
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#pragma once
#include "Player.h"
#include "PlayerOptions.h"
namespace GameLoop
{
void WelcomePlayer(sPlayer& player);
void GivePlayerOptions();
void GetPlayerInput(std::string& playerInput);
PlayerOptions EvaluateInput(std::string& playerInput);
bool RunGame();
}
Player.h
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#pragma once
#include <string>
struct sPlayer
{
std::string m_name;
};
Any help would be appreciated. Thanks.
Sep 21, 2014 at 1:34am UTC
You need to include GameLoop.cpp on the command line otherwise those function definitions you supply won't be linked in.
Sep 22, 2014 at 2:55pm UTC
That did it! Thank you.
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