On May 19, 2016, at 3:30 AM, Jarosław Bober <jaroslaw.bo...@gmail.com> wrote:
> 
> Do I have to  install devtoolset on all my machines that I want to run this
> app?

Probably, yes.  That, or redistribute parts of it with your app, either by 
cherrypicking files from the devtoolset RPM or statically linking to it.

> Or would it use built-in libstdc++ library, linking statically only
> the missing parts?

Are you asking if the new libstdc++ is statically linked into your app only for 
the new functions but your app remains dynamically linked to the old one for 
the parts of C++ that have remained unchanged, the answer is “no”.  Your app is 
linked to the new library, period.  You can use ldd(1) to prove this to 
yourself.

Yes, this is a pain, which is why most people writing software for older CentOS 
releases don’t upgrade their development tools.  There’s a lot to be said for 
holding off on using new language features until they’re available in the stock 
version of the tools for all OSes you need to deploy on.

I’d like to be using C++11 myself, but a feature-complete version of C++11 
didn’t appear in g++ until 4.8, which first shipped in CentOS 7.  I just got 
done backporting a feature to a 32-bit CentOS 5 box, so I’m probably not going 
to be able to use C++11 for another 3-5 years.  Sad, but I still get the work 
done with C++98.
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