Can't compile c++ program using gcc

pengu · 02-20-2006, 09:04 PM

Hi, I've been using linux for some time now, but am new to programming on it. When trying to compile a simple c++ program the compilation fails.

Program:

Code:

#include <iostream>
using namespace std;

// C++ Program

int main()
{
cout << "Hello World";
return 0;
}

Error:

Code:

/tmp/cc4geWt3.o: In function `main':
c++.cpp:(.text+0x25): undefined reference to `std::cout'
c++.cpp:(.text+0x2a): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)'
/tmp/cc4geWt3.o: In function `__tcf_0':
c++.cpp:(.text+0x47): undefined reference to `std::ios_base::Init::~Init()'
/tmp/cc4geWt3.o: In function `__static_initialization_and_destruction_0(int, int)':
c++.cpp:(.text+0x74): undefined reference to `std::ios_base::Init::Init()'
/tmp/cc4geWt3.o:(.eh_frame+0x11): undefined reference to `__gxx_personality_v0'
collect2: ld returned 1 exit status

Thanks for the help,

nadroj · 02-20-2006, 09:08 PM

unless im missing something, it looks fine to me.

can u copy and paste the command u used to compile it

duffmckagan · 02-20-2006, 09:52 PM

Quote:

#include <iostream>

I think it has to be iostream.h (You have iostream)

slantoflight · 02-20-2006, 09:58 PM

Hey, the same thing happens on my compiler as well!

#include <iostream.h> works but not

#include <iostream>

But interestingly enough it warns me that <iostream.h> is deprecated and I should replace it with <iostream>.
I thought <iostream> was STANDARD, though.

reddazz · 02-20-2006, 10:01 PM

The problem here is that you are using gcc and not g++. The correct way of compiling would be something like,

Code:

$g++ -o program program.cpp

Quote:

Originally Posted by duffmckagan

I think it has to be iostream.h (You have iostream)

The code is alright. C++ header files are imported differently to C header files.

bigearsbilly · 02-21-2006, 07:14 AM

if you use make it will g++ insted of gcc if your file has a .cpp extension.

you can use the inbuilt rules:

Code:

primadA$ touch 1.cpp
primadA$ make 1
g++     1.cpp   -o 1

(you don't need a makefile for simple files.

duffmckagan · 02-21-2006, 09:35 AM

Quote:

The code is alright. C++ header files are imported differently to C header files.

Yeah. I am still learning C. :P

pengu · 02-21-2006, 07:03 PM

hi, thanx for the replies. redazzz was right, using "g++ -o ... ..." solved the problem. I would like to say thanks to redazz because i see him post really helpfull comments all the time. Unfourtanatly i just broke my arm today, so i wont be awnsering many posts for a while. Typing with one hand is hard

reddazz · 02-22-2006, 02:10 AM

Quote:

Originally Posted by pengu

hi, thanx for the replies. redazzz was right, using "g++ -o ... ..." solved the problem. I would like to say thanks to redazz because i see him post really helpfull comments all the time. Unfourtanatly i just broke my arm today, so i wont be awnsering many posts for a while. Typing with one hand is hard

I'm also learning C++ so some of the stuff is still fresh in my mind.

The_Nerd · 02-22-2006, 01:59 PM

Quote:

Originally Posted by pengu

hi, thanx for the replies. redazzz was right, using "g++ -o ... ..." solved the problem. I would like to say thanks to redazz because i see him post really helpfull comments all the time. Unfourtanatly i just broke my arm today, so i wont be awnsering many posts for a while. Typing with one hand is hard

Owwhhh... Get better soon! And good luck with the learning!