"undefined reference" error with namespace across multiple files
- by user1330734
I've looked at several related posts but no luck with this error.
I receive this undefined reference error message below when my namespace exists across multiple files. If I compile only ConsoleTest.cpp with contents of Console.cpp dumped into it the source compiles.
I would appreciate any feedback on this issue, thanks in advance.
g++ Console.cpp ConsoleTest.cpp -o ConsoleTest.o -Wall
/tmp/cc8KfSLh.o: In function `getValueTest()':
ConsoleTest.cpp:(.text+0x132): undefined reference to `void Console::getValue<unsigned int>(unsigned int&)'
collect2: ld returned 1 exit status
Console.h
#include <iostream>
#include <sstream>
#include <string>
namespace Console
{
std::string getLine();
template <typename T>
void getValue(T &value);
}
Console.cpp
#include "Console.h"
using namespace std;
namespace Console
{
string getLine()
{
string str;
while (true)
{
cin.clear();
if (cin.eof()) {
break; // handle eof (Ctrl-D) gracefully
}
if (cin.good()) {
char next = cin.get();
if (next == '\n')
break;
str += next; // add character to string
} else {
cin.clear(); // clear error state
string badToken;
cin >> badToken;
cerr << "Bad input encountered: " << badToken << endl;
}
}
return str;
}
template <typename T>
void getValue(T &value)
{
string inputStr = Console::getLine();
istringstream strStream(inputStr);
strStream >> value;
}
}
ConsoleTest.cpp
#include "Console.h"
void getLineTest()
{
std::string str;
std::cout << "getLinetest" << std::endl;
while (str != "next")
{
str = Console::getLine();
std::cout << "<string>" << str << "</string>"<< std::endl;
}
}
void getValueTest()
{
std::cout << "getValueTest" << std::endl;
unsigned x = 0;
while (x != 12345)
{
Console::getValue(x);
std::cout << "x: " << x << std::endl;
}
}
int main()
{
getLineTest();
getValueTest();
return 0;
}
