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X-HELO: calimero.vinschen.de
Date: Mon, 10 Mar 2014 11:39:47 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: strtold() availability
Message-ID: <20140310103947.GC2828@calimero.vinschen.de>
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On Mar 10 10:11, V=C3=A1clav Zeman wrote:
> On 7 March 2014 21:08, Corinna Vinschen wrote:
> > On Mar  7 17:04, V=C3=A1clav Zeman wrote:
> >> Hi.
> >>
> >> This bit from /usr/include/stdlib.h hides the `strtold()` function
> >> even though the `strtold` symbol appears to be exported from
> >> `cygwin1.dll`:
> >>
> >> ~~~~{.c}
> >> /* On platforms where long double equals double.  */
> >> #ifdef _LDBL_EQ_DBL
> >> #if !defined(__STRICT_ANSI__) || (__STDC_VERSION__ >=3D 199901L) ||
> >> (__cplusplus >=3D 201103L)
> >> extern long double strtold (const char *__restrict, char **__restrict);
> >> #endif
> >> #endif /* _LDBL_EQ_DBL */
> >> ~~~~
> >>
> >> This in turn breaks my source because I cannot use `_GLIBCXX_USE_C99`
> >> to expose some C++11 features like `std::vsnprintf()`.
> >>
> >> Shouldn't the `_LDBL_EQ_DBL` guard be removed and the function exposed
> >> regardless of `double` and `long double` sizes?
> >
> > I fixed that in newlib after a discussion with my co-maintainer.
> > strtold now gets defined if _HAVE_LONG_DOUBLE is defined.  This is
> > the case for Cygwin, for instance.
>=20
> I think that similar fix needs to be applied to `wchar.h` and `wcstold()`.

Not yet.  Newlib doesn't provide wcstold, only wcstod.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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