Bug#649557: extremetuxracer: FTBFS: ppgltk/images/png_reader.cpp:80:49: error: 'int_p_NULL' was not declared in this scope

[James Cowgill]

On Fri, 2016-01-08 at 16:20 +0100, Markus Koschany wrote:
> Am 08.01.2016 um 16:02 schrieb James Cowgill:
> > On Fri, 2016-01-08 at 12:21 +0100, Markus Koschany wrote:
> > > The package cannot be built with libpng16-dev because it
> > > conflicts with libpng12-dev. I will try to verify this patch as
> > > soon as this issue is resolved.
> > 
> > This is intentional. Both packages provide files such as
> > /usr/include/png.h and libpng.so so they have to conflict with each
> > other.
> > 
> > You have to remove libpng12-dev first or build the package in a
> > chroot.
> 
> Hi,
> 
> I just have replaced the current B-D on libpng-dev with libpng16-dev
> and I only build in clean chroots. My guess is that another build-
> dependency pulls in libpng12-dev and that leads to the aforementioned
> conflict. If I'm not mistaken I have to wait until the other package
> is fixed and then I can fix this issue. Right?

Ah ok, I think this is because libpng16-dev doesn't provide libpng-dev
so any *-dev package depending on libpng-dev will use libpng12-dev.

This is the package Tobias Frost posted which has libpng-dev enabled:
https://libpng.sviech.de/libpng_package_used/libpng1.6_1.6.19-1.dsc

This thread has the link (+ some discussion):
https://lists.debian.org/debian-devel/2016/01/msg00159.html

James
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