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Date:      Thu, 29 May 2014 15:19:27 -0400
From:      Lowell Gilbert <freebsd-ports-local@be-well.ilk.org>
To:        hhh@sdf.org
Cc:        freebsd-ports@freebsd.org
Subject:   Re: g++ cannot find std::stoi
Message-ID:  <44k3942y0w.fsf@be-well.ilk.org>
In-Reply-To: <874n09tr87.fsf@gmail.com> (hhh@sdf.org's message of "Thu, 29 May 2014 01:31:52 %2B0200")
References:  <874n09tr87.fsf@gmail.com>

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hhh@sdf.org writes:

> I'm trying to compile OpenCog [1] using g++47, but get an error about
> missing std::stoi.
>
> I have attached a micro-example [2] that generates the same error, if I
> try to compile it with:
>
> % g++47 -std=c++11 s.cc
> s.cc: In function 'int main()':
> s.cc:8:13: error: 'stoi' is not a member of 'std'
>
>
> There are no problems neither with clang nor with g++ on Debian:
>
> % clang++ -std=c++11 s.cc
>
>
>
> What am I missing?

An old libc++ bug in gcc.

You need a newer compiler. 

The default compiler on recent (I think 10.0 and up) is a version of
clang that will get this right.



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