Am Sonntag, den 24.01.2016, 12:39 +0300 schrieb Sergei Golovan:
> Hi Tobias,
> 
> On Sun, Jan 24, 2016 at 12:17 PM, Tobias Frost <t...@frost.de> wrote:
> > (Resent -- buxtehude.d.o was down yesterday)
> > 
> > > Gianfranco,
> > > can you elaborate?
> > > (Its not common that libpng16 patches breaks compatiblity with
> > > libpng12)
> 
> It's just the way it's written. You can look here
> http://sourceforge.net/p/tkimg/code/HEAD/tree/trunk/libpng/pngtclStub
> Init.c
> and see that the tkimg library maintains a full internal table of
> libpng interface functions (I guess it makes more sense for Windows
> than for Linux but anyway), so if these function change then tkimg
> loses its compatibility with the previous libpng version. There're no
> changes from the user's point of view. All Tcl scripts that use tkimg
> continue working as before.
> 
> Cheers!

I see.
In this case an explicit B-D on libpng16-dev is probably more sane.

--
tobi

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