Emacs and last libpng release

Angelo Graziosi angelo.graziosi@alice.it
Tue Feb 10 17:36:00 GMT 2015

Il 10/02/2015 17:55, Angelo Graziosi ha scritto:
> Ken Brown wrote:
>> I think the better way is for all libraries that rely on libpng15 to
>> rebuild for libpng16.
> Does this mean that there is some library which, after being rebuilt,
> will allow Emacs to be build OB, linking to libpng16, without the need
> to install libpng15?

Maybe I have understood.. it seems an issue similar to that I flagged 
here: https://cygwin.com/ml/cygwin/2014-12/msg00390.html

The build log shows:

   Does Emacs use a png library?                           yes -lpng16

and ldd :

$ ldd /usr/local/emacs/bin/emacs.exe | grep png
         cygpng16-16.dll => /usr/bin/cygpng16-16.dll (0x3f6700000)
         cygpng15-15.dll => /usr/bin/cygpng15-15.dll (0x3f6740000)

So, the "spurious" dependency could came from ImageMagick which still 
depend on libpng15.

> Ciao,
>   Angelo.

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