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Message-ID: <1421428942.5548.6.camel@cygwin.com>
Subject: Re: std::to_string missing under gcc 4.8.3?
From: Yaakov Selkowitz <yselkowitz@cygwin.com>
To: cygwin@cygwin.com
Date: Fri, 16 Jan 2015 11:22:22 -0600
In-Reply-To: <20150116104740.GA3122@calimero.vinschen.de>
References: <loom.20150105T175419-513@post.gmane.org>	 <loom.20150115T172713-675@post.gmane.org>	 <20150116104740.GA3122@calimero.vinschen.de>
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On Fri, 2015-01-16 at 11:47 +0100, Corinna Vinschen wrote:
> On Jan 15 16:32, Mark Ziesemer wrote:
> > Bump / any ideas here?
> > 
> > > $ cat test.cpp
> > > #include <string>
> > > 
> > > int main()
> > > {
> > >         std::to_string(0);
> > >         return 0;
> > > }
> > > 
> > > # Reference:
> > >
> > http://stackoverflow.com/questions/12975341/to-string-is-not-a-member-of-std-says-so-g
> > > 
> > > $ g++ -std=c++1y test.cpp
> > > test.cpp: In function ‘int main()’:
> > > test.cpp:5:2: error: ‘to_string’ is not a member of ‘std’
> > >   std::to_string(0);
> > >   ^
> 
> The problem is a shortcoming of newlib.  Newlib doesn't provide most
> "long double" functions, which in turn makes newlib not C99 aware.
> This in turn enables the flag _GLIBCXX_HAVE_BROKEN_VSWPRINTF at compile

_GLIBCXX_USE_C99

> time of libstdc++ which, unfortunately, disables the entire "to_string"
> functionality, even for non-"long double" values.

The alternative is to hack libstdc++ to separate long double functions
from the rest of the C99 functionality.

> We're still hoping to get the "long double" functionality into newlib at
> one point.

That would be nice...


Yaakov



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