multiple definition of `atan2l' on the current Cygwin
Corinna Vinschen
corinna-cygwin@cygwin.com
Thu Apr 14 13:52:00 GMT 2016
On Apr 14 19:00, Takashi Yano wrote:
> Hi Corinna,
>
> 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?
>
> It is because optimizer removes the function call.
>
> Try:
>
> $ cat > m.cc <<EOF
> #include <cstdio>
> #include <cmath>
>
> 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
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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