std::to_string is not a member of 'std'

[apex-omontgomery]

Description

It's my understanding that this is due to cygwin issues
Mailing list: here

I cannot modify my gcc:cygwin.

Steps to reproduce

PS C:\application\common\tests> g++ -std=c++11 -Wfatal-errors -Wall -I. -c 000-CatchMain.cpp
In file included from 000-CatchMain.cpp:9:0:
catch.hpp: In function 'std::string Catch::to_string(const T&)':
catch.hpp:8418:16: error: 'to_string' is not a member of 'std'
         return std::to_string(t);
                ^
compilation terminated due to -Wfatal-errors.

Extra information

PS C:\application\common\tests> head -n 3 .\catch.hpp
/*
 *  Catch v2.4.0
 *  Generated: 2018-09-04 11:55:01.682061

C:\Users\me>ver

Microsoft Windows [Version 10.0.16299.611]

PS C:\application\common\tests> g++ --version
g++ (GCC) 4.9.3
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.