How to Make Visual Studio C++ 2010 Compilation Behave Like gcc/g++? (or vice-versa)

Question

Say you've got the following simple main.cpp file:

#include <cstdlib>
#include <iostream>
#include <fstream>

using namespace std;

int main() {
    const string FILENAME = "foo.txt";
    ifstream somefile(FILENAME);
    populations.close();
    return 0;
}

This compiles fine via Visual Studio C++ 2010.

However, on a Linux-based system, if I execute make main and compile, we get an expected error since we didn't call c_str() on the string constant, like so:

ifstream somefile(FILENAME.c_str());

As is commonly known, and described in this SO thread.

How can I get VS to behave like gcc/g++ and raise a compilation error for the code above? Or, how can I get gcc/g++ to behave like VS and compile the above without error? (Is it a simple matter of upgrading my gnu compiler?)

(I don't believe disabling compiler extensions is a solution, as I've done this and it still compiles without error.)

http://stackoverflow.com/questions/5060034/vs2010-c-and-c-enforce-ansi-compliance-for-linux-gcc-compatibility — Gant, Oct 07 '11 at 15:50

jpalecek · Answer 1 · 2011-10-07T15:50:40.597

6

Visual Studio behaves correctly in this case with respect to the C++11 standard (it works on g++ now, too). I'm not sure why would you want to do this, but you'll probably need to edit MSVC's headers (not advisable and rather drastic).

Strange thing is though, that they don't write it in their documentation. Can you check which constructor is actually being called?

edited Oct 07 '11 at 15:50

answered Oct 07 '11 at 15:41

jpalecek

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It goes into: explicit basic_ifstream(const string& _Str, ios_base::openmode _Mode = ios_base::in, int _Prot = (int)ios_base::_Openprot) – crashmstr Oct 07 '11 at 15:52
Thanks for this insight jpalecek. – ybakos Oct 07 '11 at 15:53
It's not mentioned in the documentation under basic_ifstream either: http://msdn.microsoft.com/en-us/library/zek0beca(v=VS.100).aspx – Mooing Duck Oct 07 '11 at 16:12

score 5 · Accepted Answer · answered Oct 07 '11 at 15:45

5

It is available as part of the newer c++ standard.

To disable, add

  #define _HAS_CPP0X 0

at the top before your includes.

answered Oct 07 '11 at 15:45

crashmstr

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This does work, although I recognize it's probably better for me to upgrade by gnu toolkit. – ybakos Oct 07 '11 at 15:53

How to Make Visual Studio C++ 2010 Compilation Behave Like gcc/g++? (or vice-versa)

2 Answers2