multiple definition of `atan2l' on the current Cygwin

multiple definition of `atan2l' on the current Cygwin

[Tatsuro MATSUOKA]

Hello
I have updated Cygwin_x86 and Cygwin_x86-64 today.
In building the gnuplot I have met the error of "multiple definition of `atan2l'".
/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
Makefile:777: recipe for target 'gnuplot.exe' failed
This did not occur yesterday.
Perhaps the latest change gcc-5.3.0 give this results.
At the moment a workaroud is :
LDFLAGS='-Wl,--allow-multiple-definition' \
at configure.

Tatsuro

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Re: multiple definition of `atan2l' on the current Cygwin

[Corinna Vinschen]

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On Apr 12 17:11, Tatsuro MATSUOKA wrote:
> Hello
> I have updated Cygwin_x86 and Cygwin_x86-64 today.
> In building the gnuplot I have met the error of "multiple definition of `atan2l'".
> /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
> Makefile:777: recipe for target 'gnuplot.exe' failed
> This did not occur yesterday.
> Perhaps the latest change gcc-5.3.0 give this results.
> At the moment a workaroud is :
> LDFLAGS='-Wl,--allow-multiple-definition' \
> at configure.

I can't reproduce this with a simple testcase:

  $ cat > m.cc <<EOF
  #include <math.h>

  int main ()
  {
    atan2l (1.0, 2.0);
  }
  EOF
  $ g++ -g -o m m.cc -lm -lstdc++ -lm -lstdc++

This builds and links fine for me.

Is there a chance that gnuplot accidentally provides its own atan2l on
Cygwin, despite Cygwin 2.5.0 now providing it per C99?  Or did you, by
any chance, try to rebuild gnuplot without reconfiguring the build?

Can you please provide a simple, self-contained testcase?


Thanks,
Corinna

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

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Re: multiple definition of `atan2l' on the current Cygwin

[Tatsuro MATSUOKA]

> From: Corinna Vinschen > To: cygwin@cygwin.com
> Cc: 
> Date: 2016/4/12, Tue 22:39
> Subject: Re: multiple definition of `atan2l' on the current Cygwin
> 
> On Apr 12 17:11, Tatsuro MATSUOKA wrote:
>>  Hello
>>  I have updated Cygwin_x86 and Cygwin_x86-64 today.
>>  In building the gnuplot I have met the error of "multiple definition 
> of `atan2l'".
> I can't reproduce this with a simple testcase:
> 
>   $ cat > m.cc <<EOF
>   #include <math.h>
> 
>   int main ()
>   {
>     atan2l (1.0, 2.0);
>   }
>   EOF
>   $ g++ -g -o m m.cc -lm -lstdc++ -lm -lstdc++
> 
> This builds and links fine for me.
> 
> Is there a chance that gnuplot accidentally provides its own atan2l on
> Cygwin, despite Cygwin 2.5.0 now providing it per C99?  Or did you, by
> any chance, try to rebuild gnuplot without reconfiguring the build?
> 
> Can you please provide a simple, self-contained testcase?
Your testcase also works here.
I tried to make the test but I could not make a simple, self-contained testcase.
Instead I copy and paste full compile command and output at the link.
Tatsuro
*******************************************
c++  -g -O2 -I/usr/lib/wx/include/gtk2-unicode-3.0 -I/usr/include/wx-3.0 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE=1 -DWXUSINGDLL -D__WXGTK__  -I/usr/include/pango-1.0 -I/usr/include/harfbuzz -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/freetype2 -I/usr/include/libpng16 -D_REENTRANT -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/cairo -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libpng16 -I/usr/include/pango-1.0 -I/usr/include/harfbuzz -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/freetype2 -I/usr/include/libpng16  -L/usr/local/lib -lcerf  -o gnuplot.exe alloc.o axis.o breaders.o
 boundary.o color.o command.o contour.o datablock.o datafile.o dynarray.o eval.o external.o fit.o gadgets.o getcolor.o graph3d.o graphics.o help.o hidden3d.o history.o internal.o interpol.o jitter.o libcerf.o matrix.o misc.o mouse.o multiplot.o parse.o plot.o plot2d.o plot3d.o pm3d.o readline.o save.o scanner.o set.o show.o specfun.o standard.o stats.o stdfn.o tables.o tabulate.o term.o time.o unset.o util.o util3d.o variable.o version.o wxterminal/wxt_gui.o wxterminal/gp_cairo.o wxterminal/gp_cairo_helpers.o   -lz -lgd -lgd -ljpeg -lz -lpng16 -lm -lz -lfreetype -lbz2 -lz -lpng16 -lm -lz -lfontconfig -lexpat -lfreetype -lbz2 -lz -lpng16 -lm -lz -lexpat -lfreetype -lbz2 -lz -lpng16 -lm -lz -lfontconfig -lXpm -lX11 -lxcb -lXau -lXdmcp -lvpx -lm -lpthread -ltiff -llzma -ljbig -ljpeg -lz -liconv -llua -lcaca  -lwx_gtk2u_xrc-3.0 -lwx_gtk2u_webview-3.0 -lwx_gtk2u_html-3.0 -lwx_gtk2u_qa-3.0 -lwx_gtk2u_adv-3.0 -lwx_gtk2u_core-3.0 -lwx_baseu_xml-3.0
 -lwx_baseu_net-3.0 -lwx_baseu-3.0  -lpangocairo-1.0 -lpango-1.0 -lgobject-2.0 -lglib-2.0 -lintl -lcairo -lgtk-x11-2.0 -lgdk-x11-2.0 -lpangocairo-1.0 -lgio-2.0 -lXrender -lXinerama -lXi -lXrandr -lXcursor -lXcomposite -lXdamage -lXfixes -lX11 -lXext -latk-1.0 -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lpangoft2-1.0 -lpango-1.0 -lgobject-2.0 -lglib-2.0 -lintl -lfontconfig -lfreetype  -lcaca -lcerf  -lz -lpangocairo-1.0 -lpango-1.0 -lgobject-2.0 -lcairo -lglib-2.0 -lintl
/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

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Re: multiple definition of `atan2l' on the current Cygwin

[Corinna Vinschen]

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On Apr 13 09:08, Tatsuro MATSUOKA wrote:
> > From: Corinna Vinschen > To: cygwin@cygwin.com
> > Cc: 
> > Date: 2016/4/12, Tue 22:39
> > Subject: Re: multiple definition of `atan2l' on the current Cygwin
> > 
> > On Apr 12 17:11, Tatsuro MATSUOKA wrote:
> >>  Hello
> >>  I have updated Cygwin_x86 and Cygwin_x86-64 today.
> >>  In building the gnuplot I have met the error of "multiple definition 
> > of `atan2l'".
> > I can't reproduce this with a simple testcase:
> > 
> >   $ cat > m.cc <<EOF
> >   #include <math.h>
> > 
> >   int main ()
> >   {
> >     atan2l (1.0, 2.0);
> >   }
> >   EOF
> >   $ g++ -g -o m m.cc -lm -lstdc++ -lm -lstdc++
> > 
> > This builds and links fine for me.
> > 
> > Is there a chance that gnuplot accidentally provides its own atan2l on
> > Cygwin, despite Cygwin 2.5.0 now providing it per C99?  Or did you, by
> > any chance, try to rebuild gnuplot without reconfiguring the build?
> > 
> > Can you please provide a simple, self-contained testcase?
> Your testcase also works here.
> I tried to make the test but I could not make a simple, self-contained testcase.
> Instead I copy and paste full compile command and output at the link.

That's not helpful, unfortunately.  What about my other questions?


Corinna

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

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Re: multiple definition of `atan2l' on the current Cygwin

[René Berber]

On 4/12/2016 7:08 PM, Tatsuro MATSUOKA wrote:

[snip]
> /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

Those lines point to the double definition very clearly.

In Linux, libstdc++ doesn't include atan2l, only libm has it.  The
question then is: why is libstdc++ different?
-- 
René Berber


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Re: multiple definition of `atan2l' on the current Cygwin

[Marco Atzeri]

On 13/04/2016 18:55, René Berber wrote:
> On 4/12/2016 7:08 PM, Tatsuro MATSUOKA wrote:
>
> [snip]
>> /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
>
> Those lines point to the double definition very clearly.
>
> In Linux, libstdc++ doesn't include atan2l, only libm has it.  The
> question then is: why is libstdc++ different?
>

likely because it was built before that libm had it.
Only latest cygwin 2.5.0 has it.

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Re: multiple definition of `atan2l' on the current Cygwin

[Corinna Vinschen]

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On Apr 13 11:55, René Berber wrote:
> On 4/12/2016 7:08 PM, Tatsuro MATSUOKA wrote:
> 
> [snip]
> > /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
> 
> Those lines point to the double definition very clearly.
> 
> In Linux, libstdc++ doesn't include atan2l, only libm has it.  The
> question then is: why is libstdc++ different?

If it's that simple, why does my STC (or a simple variation thereof) not
complain?


Corinna

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

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Re: multiple definition of `atan2l' on the current Cygwin

[Takashi Yano]

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

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>

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Re: multiple definition of `atan2l' on the current Cygwin

[Corinna Vinschen]

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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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Re: multiple definition of `atan2l' on the current Cygwin

[JonY]

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On 4/14/2016 21:52, Corinna Vinschen wrote:
> 
> 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?
> 

Already on it, uploads should start over the weekends.



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Re: multiple definition of `atan2l' on the current Cygwin

[Tatsuro MATSUOKA]

> From: Corinna Vinschen >
> To: cygwin> Cc: JonY
> Date: 2016/4/14, Thu 22:52
> Subject: Re: multiple definition of `atan2l' on the current Cygwin
> 
> 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
I have confirmed the mutiple definition error does not occur on gnuplot build with 
gcc-5.3.0-4 today.
Thanks!
Tatsuro


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Re: multiple definition of `atan2l' on the current Cygwin

[Tatsuro MATSUOKA]

> 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


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Re: multiple definition of `atan2l' on the current Cygwin

[Tatsuro MATSUOKA]

> 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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Re: multiple definition of `atan2l' on the current Cygwin

[Warren Young]

On Apr 11, 2016, at 9:06 PM, Tatsuro MATSUOKA <tmacchant2@yahoo.co.jp> wrote:
> 
> In building the gnuplot

Why aren’t you using the gnuplot package in the Cygwin package repository?

> I have met the error of "multiple definition of `atan2l’".

This is doubtless because that function was just added to Cygwin in 2.5.0.

Perhaps gnuplot is providing its own copy due to a naive platform test?  Have you tried a clean reconfigure and rebuild?
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Re: multiple definition of `atan2l' on the current Cygwin

[Tatsuro MATSUOKA]

Please inore this post.
I have made a mistake to post under the different thread.

       
       
> From: Tatsuro MATSUOKA 
> To: cygwin
> Cc: 
> Date: 2016/4/12, Tue 12:06
> Subject: multiple definition of `atan2l' on the current Cygwin
> 
> I have updated Cygwin_x86 and Cygwin_x86-64 today.
> In building the gnuplot I have met the error of "multiple definition of 
> `atan2l'".
> /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
> Makefile:777: recipe for target 'gnuplot.exe' failed
> This did not occur yesterday.
> Perhaps the latest change gcc-5.3.0 give this results.
> At the moment a workaroud is :
> LDFLAGS='-Wl,--allow-multiple-definition' \
> at configure.
> Tatsuro
>

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multiple definition of `atan2l' on the current Cygwin

[Tatsuro MATSUOKA]

I have updated Cygwin_x86 and Cygwin_x86-64 today.
In building the gnuplot I have met the error of "multiple definition of `atan2l'".
/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
Makefile:777: recipe for target 'gnuplot.exe' failed
This did not occur yesterday.
Perhaps the latest change gcc-5.3.0 give this results.
At the moment a workaroud is :
LDFLAGS='-Wl,--allow-multiple-definition' \
at configure.
Tatsuro


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