Re: g++ linker error

[marcel@ballistix.icce.rug.nl (Marcel Harkema)]

On Thu, Oct 14, 1999 at 12:28:47PM +0200, Oliver Bettinger wrote:
> 
> I just installed Debian 2.1 and tried tu compile a small program with the
> g++ compiler. It worked. then I tried to write a Header file and a CPP file
> and compile it, so I could use the methods in there in other programs. Just
> to test, if it would work. Here are the files:
> 
> HEADER:
> struct Test {
>    void func();
> };
> 
> CPP:
> #include "test.h"
> #include <iostream>
> using namespace std;
> void Test::func() {
>    cout << "This function does absolutely nothing!\n";
> }
> 
> Thats all.
> As I said    g++ test.cpp
> my compiler returned:
> /usr/lib/crt1.o(.text+0x36): undefined reference to 'main'
> collect2: ld returned 1 exit status
> 
> What went wrong??? HELP!!!

  I suggest you buy yourself a good C++ book, and read the manpage of gcc.
  Anyway, you probably want to use 'g++ -c test.cpp' to compile to a .o file
  instead of building an executable (you have no main function).