Re: [gentoo-dev] Need some c++ help here please:

[Richard Reich]

ou need to drop the .h.  The header files for the new stl and iostream
libs have been changed for the new standard.  

You'll also need to do 1 of 2 things

using namespace std;
or 
std::cout << "Hello World" << std::endl;

anyway, here are the changes...

#include <iostream>
using namespace std;
int main(){
     cout << "Hello World" << endl;
      return(0);
}

OR......................
#include <iostream>

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


also gcc doesn't by default link the stl lib to the app.  g++ will.

That should take care of your problems

- Richard Reich

On Mon, 2002-08-26 at 10:42, Spider wrote:
>
> cat hiworld.cpp
> #include <iostream.h>
> int main(){
>         cout << "Hello World" << endl;
>         return(0);
> }
>
>
> Old standard, but should work afaik...
>
> gcc -dumpversion
> 3.2
>
> c++ -dumpversion
> 3.2
>
>
>
> spider@Darkmere> gcc -o hiworld hiworld.cpp
> In file included from /usr/include/g++-v32/backward/iostream.h:31,
>                  from hiworld.cpp:1:
> /usr/include/g++-v32/backward/backward_warning.h:32:2: warning: #warning
> This file includes at least one deprecated or antiquated header. Please
> consider using one of the 32 headers found in section 17.4.1.2 of the
> C++ standard. Examples include substituting the <X> header for the <X.h>
> header for C++ includes, or <sstream> instead of the deprecated header
> <strstream.h>. To disable this warning use -Wno-deprecated.
> /tmp/ccKgk3Jj.o: In function `main':
> /tmp/ccKgk3Jj.o(.text+0x13): undefined reference to `std::cout'
> /tmp/ccKgk3Jj.o(.text+0x20): 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/ccKgk3Jj.o(.text+0x2b): undefined reference to
> `std::basic_ostream<char, std::char_traits<char> >& std::endl<char,
> std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char>
> >&)'
> /tmp/ccKgk3Jj.o(.text+0x30): undefined reference to
> `std::basic_ostream<char, std::char_traits<char>
> >::operator<<(std::basic_ostream<char, std::char_traits<char> >&
> >(*)(std::basic_ostream<char, std::char_traits<char> >&))'
> /tmp/ccKgk3Jj.o: In function
> `__static_initialization_and_destruction_0(int, int)':
> /tmp/ccKgk3Jj.o(.text+0x59): undefined reference to
> `std::ios_base::Init::Init[in-charge]()'
> /tmp/ccKgk3Jj.o: In function `__tcf_0':
> /tmp/ccKgk3Jj.o(.text+0x8a): undefined reference to
> `std::ios_base::Init::~Init [in-charge]()'
> /tmp/ccKgk3Jj.o(.eh_frame+0x11): undefined reference to
> `__gxx_personality_v0'
> collect2: ld returned 1 exit status
>
> spider@Darkmere> c++ -o hiworld hiworld.cpp
>                                           /tmp/dd
> In file included from /usr/include/g++-v32/backward/iostream.h:31,
>                  from hiworld.cpp:1:
> /usr/include/g++-v32/backward/backward_warning.h:32:2: warning: #warning
> This file includes at least one deprecated or antiquated header. Please
> consider using one of the 32 headers found in section 17.4.1.2 of the
> C++ standard. Examples include substituting the <X> header for the <X.h>
> header for C++ includes, or <sstream> instead of the deprecated header
> <strstream.h>. To disable this warning use -Wno-deprecated.
>
>
>
>
> But this works.... .
>
> Now.. what am I missing here???
>
> //Spider
>
>
> --
> begin  .signature
> This is a .signature virus! Please copy me into your .signature!
> See Microsoft KB Article Q265230 for more information.
> end