GCC issue

[Suvayu Ali]

Hi,

I have a strange problem.  When I try to use std::to_string() I get the
following error:

$ g++ -o test_to_string test_to_string.cc
  test_to_string.cc: In function ‘int main()’:
  test_to_string.cc:7:28: error: ‘to_string’ is not a member of ‘std’
     std::cout << "Five: " << std::to_string(5) << std::endl;
                              ^

Here is my test file (test_to_string.cc):

----------8<----------8<----------
#include <iostream>
#include <string>

int main()
{
  std::cout << "Five: " << std::to_string(5) << std::endl;
  return 0;
}
----------8<----------8<----------

A quick search does not point me to any error on my part[1].  Is there a
bug in Fedora GCC?

Thanks for any thoughts.

[1] http://en.cppreference.com/w/cpp/string/basic_string/to_string

[Suvayu Ali]

On Tue, Oct 08, 2013 at 09:20:58AM +0200, Suvayu Ali wrote:
> I have a strange problem.  When I try to use std::to_string() I get the
> following error:
>
> $ g++ -o test_to_string test_to_string.cc
>   test_to_string.cc: In function ‘int main()’:
>   test_to_string.cc:7:28: error: ‘to_string’ is not a member of ‘std’
>      std::cout << "Five: " << std::to_string(5) << std::endl;

Okay, found my problem.  I have to explicitly choose C++11.  I did not
realise C++11 was not the default.  Any ideas why?

[Andrew Haley]

On 10/08/2013 08:30 AM, Suvayu Ali wrote:
> Okay, found my problem.  I have to explicitly choose C++11.  I did not
> realise C++11 was not the default.  Any ideas why?

We (GCC maintainers) tend to change defaults when it's what the
majority of users want.  For most people C++11 is still experimental.
Changing the default language is risky because it breaks build
scripts.

Andrew.

[Suvayu Ali]

Hi Andrew and Mamoru,

On Tue, Oct 08, 2013 at 08:57:29AM +0100, Andrew Haley wrote:
> On 10/08/2013 08:30 AM, Suvayu Ali wrote:
> > Okay, found my problem.  I have to explicitly choose C++11.  I did not
> > realise C++11 was not the default.  Any ideas why?
>
> We (GCC maintainers) tend to change defaults when it's what the
> majority of users want.  For most people C++11 is still experimental.
> Changing the default language is risky because it breaks build
> scripts.

Thank you for both your answers.  Both make sense.  :)

Cheers,