librdf libraries not installed on Ubuntu

[gothub]

It appears that the librdf system libraries that the 'redland' R package requires can't be installed on Ubuntu (rhub platform: Ubuntu Linux 16.04 LTS, R-release, GCC).

How can this be resolved? The packages are available for Ubuntu 16.04 LTS.

Here is the log.

... and here are the relevant lines from that log:

82#> Some packages could not be installed. This may mean that you have
83#> requested an impossible situation or if you are using the unstable
84#> distribution that some required packages have not yet been created
85#> or been moved out of Incoming.
86#> The following information may help to resolve the situation:
87#> The following packages have unmet dependencies:
88#> librdf0-dev : Depends: libraptor2-dev (>= 2.0.10) but it is not going to be installed
89#> Depends: librasqal3-dev (>= 0.9.30) but it is not going to be installed
90#> E: Unable to correct problems, you have held broken packages.

Here are the libraries that are installed on my local Ubuntu 16.04 LTS:

root@kube-01:~# sudo apt list --installed    | egrep '(rdf|rasqal|raptor)'
libraptor2-0/xenial,now 2.0.14-1 amd64 [installed]
libraptor2-dev/xenial,now 2.0.14-1 amd64 [installed,automatic]
librasqal3/xenial,now 0.9.32-1 amd64 [installed]
librasqal3-dev/xenial,now 0.9.32-1 amd64 [installed,automatic]
librdf0/xenial,now 1.0.17-1build1 amd64 [installed]
librdf0-dev/xenial,now 1.0.17-1build1 amd64 [installed]
raptor2-utils/xenial,now 2.0.14-1 amd64 [installed,automatic]
rasqal-utils/xenial,now 0.9.32-1 amd64 [installed,automatic]
root@kube-01:~# lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 16.04.4 LTS
Release:	16.04
Codename:	xenial

[gaborcsardi]

Hopefully this is fixed now.

[michaelmayer2]

I am still seeing this with Ubuntu Focal (20.04 LTS)

The following packages have unmet dependencies:
 librdf0-dev : Depends: libraptor2-dev (>= 2.0.10) but it is not going to be installed
               Depends: librasqal3-dev (>= 0.9.30) but it is not going to be installed

Both libraptor2-dev and librasqual3-dev are available in much later versions than required in the error message (2.0.15-0ubuntu1.20.04.1 and 0.9.33-0.1, respectively).

This is with pak 0.7.2 when trying to install the system requirements via pak::pkg_sysreqs() using the attached list of packages.

When manually installing all 3 dependencies, another error message pops up highlighting IMHO the root cause

The following packages have unmet dependencies:
 libcurl4-gnutls-dev : Conflicts: libcurl4-openssl-dev but 7.68.0-1ubuntu2.22 is to be installed
 libcurl4-openssl-dev : Conflicts: libcurl4-gnutls-dev but 7.68.0-1ubuntu2.22 is to be installed

It seems that both libcurl4-* packages are mutually exclusive but for some reason our dependency tracking mechanism in pak desires to use both of them.

pak-deps.txt

@gaborcsardi feel free to move to the pak repo - I think it makes more sens to get it fixed over there.