[Debian-science-sagemath] apt upgrading issue:

[Tobias Hansen]

On 08/11/2016 01:18 PM, Tobias Hansen wrote:
> On 08/11/2016 11:51 AM, Jerome BENOIT wrote:
>> Hi,
>>
>> On 11/08/16 10:51, Ximin Luo wrote:
>>> Jerome BENOIT:
>>>>  sagemath-build-deps : Depends: libbrial-dev (>= 0.8.5) but it is not going to be installed
>>>>                        Depends: libbrial-groebner-dev (>= 0.8.5) but it is not going to be installed
>>>>                        Depends: python-brial (>= 0.8.5) but it is not going to be installed
>>>>
>>
>>> What's the rest of the error message? When it says "it is not going to be installed", there should be other reasons on why, above this.
>>
>> Indeed, but I could not figure it out. Hence my email.
>>
>>
>>> You could also try using `aptitude install -R sagemath-build-deps` instead of apt-get, it has a more sophisticated dependency resolution.
>>
>> Finally I get a hint from dselect:
>>
>> 	libbrial-groebner-dev depends on libbrial-groebner0 (= 0.8.5-0+sage1)
>> 	libbrial-groebner0 depends on libpng12-0 (>= 1.2.13-4)
>> 	libpng12-0 does not appear to be available
>>
>> It appears that libpng12-0 is effectively not available in Sid for amd64 architecture:
>> I guess that brial was built within a Jessie environment or something.
>> Second, I am surprised to meet PNG here.
>>
> 
> Ok, I still had libpng12-0 installed in my unstable chroot. It was only
> removed from unstable in May. I'll reupload a version of the package
> without the dependency.
> 
> Best,
> Tobias

I uploaded a new version which now depends on libpng16-16. That's the
reason why it's good we don't all have the same chroot. Thanks!