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Date:	Thu, 14 Apr 2016 15:52:35 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Cc:	JonY <10walls AT gmail DOT com>
Subject:	Re: multiple definition of `atan2l' on the current Cygwin
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On Apr 14 19:00, Takashi Yano wrote:
> Hi Corinna,
>=20
> On Thu, 14 Apr 2016 09:52:05 +0200
> Corinna Vinschen wrote:
> > If it's that simple, why does my STC (or a simple variation thereof) not
> > complain?
>=20
> It is because optimizer removes the function call.
>=20
> Try:
>=20
> $ cat > m.cc <<EOF
> #include <cstdio>
> #include <cmath>
>=20
> int main()
> {
>   long double x, y;
>   scanf("%Lf %Lf", &x, &y);
>   printf("%Lf\n", atan2l(x,y));
>   return 0;
> }
> EOF
> $ g++ m.cc -lm

Thanks!  So that's why my testcase didn't work :}

This is actually a problem in libstdc++-v3.  On platforms missing
certain long double functions libstdc++-v3 is built with stub functions
using the same name.

Jon, any chance to rebuild the gcc packages ASAP?


Thanks,
Corinna

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

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