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Date: Tue, 19 Apr 2016 08:33:22 +0900 (JST)
From: Tatsuro MATSUOKA <tmacchant2 AT yahoo DOT co DOT jp>
Reply-To: Tatsuro MATSUOKA <matsuoka AT nuce DOT nagoya-u DOT ac DOT jp>
Subject: Re: multiple definition of `atan2l' on the current Cygwin
To: cygwin AT cygwin DOT com
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> From: Tatsuro MATSUOKA
> To: cygwin
           > Cc: 
> Date: 2016/4/17, Sun 14:15
> Subject: Re: multiple definition of `atan2l' on the current Cygwin
> 
>>  I have confirmed the mutiple definition error does not occur on gnuplot 
> build 
>>  with 
>>  gcc-5.3.0-4 today.
>>  Thanks!
>>  Tatsuro
> 
> The above is for Cygwin X86.
> Cygwin 64 still has problem
> // m.cc
> #include <cstdio> 
> #include <cmath> 
> 
> int main() 
> { 
>   long double x, y; 
>   scanf("%Lf %Lf", &x, &y); 
>   printf("%Lf\n", atan2l(x,y)); 
>   return 0; 
> } 
> //m.cc
> LANG=C g++ m.cc -lm
> /usr/lib/gcc/x86_64-pc-cygwin/5.3.0/libstdc++.dll.a(d005836.o):(.text+0x0): 
> multiple definition of `atan2l'
> /usr/lib/../lib/libm.a(t-d000195.o):fake:(.text+0x0): first defined here
> collect2: error: ld returned 1 exit status
> Tatsuro

gcc-5.3.0 for x86 has been updated to gcc-5.3.0-5
http://cygwin.1069669.n5.nabble.com/Updated-gcc-5-3-0-5-x64-td126377.html  
I confirmed this update resolve this issue.
Thanks!
Tatsuro  

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