Can't install libqt4-dev

[walkeraj]

Was attempting to install libqt4-dev so that I could use openscad, but keep running into inane dependency issues:

First I tried:

$ apt-get install -f libqt4-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  libqt4-dev: Depends: libxft-dev but it is not going to be installed

Which meant that I then had to walk the dependency tree manually to determine the problem:

$ apt-get install libxft-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  libxft-dev: Depends: libfontconfig1-dev but it is not going to be installed

And then

$ apt-get install libfontconfig1-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  libfontconfig1-dev: Depends: libfontconfig1 (= 2.6.0-1ubuntu12) but 2.8.0-0ubuntu1 is to be installed

Ah, finally some useful information! So what's the deal here? My /etc/apt/sources.list is:

deb http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu karmic main
deb http://archive.ubuntu.com/ubuntu/ karmic main universe restricted multiverse
deb http://security.ubuntu.com/ubuntu/ karmic-security universe main multiverse restricted
deb http://archive.ubuntu.com/ubuntu/ karmic-updates universe main multiverse restricted

If I look at the properties of libfontconfig1 in synaptic, the versions tab lists:

2.8.0-0ubuntu1 (now)
2.6.0-1ubuntu12 (karmic)

Sooo.. what does that mean,exactly? Is the libqt4-dev package out of date? Am I somehow ahead of where I should be? What do I need to do?

[guriinii]

This tedious process does end. I have done it. The Packages do genuinely need the dependencies. Just keep at it.

[walkeraj]

This tedious process does end. I have done it. The Packages do genuinely need the dependencies. Just keep at it.

What? What does that even mean? I can't 'just keep at it'. I kept at it, but I couldn't figure it out, now I'm asking here for the answer to my problem.

[bodhi.zazen]

You should file a bug report about the "missing" dependencies on launchpad.

I would file a bug against libfontconfig1-dev

[walkeraj]

Well I'm not sure if they're "missing", they just seem to be unresolved somehow. The main reason I came here was to determine if it is or is not a bug or if it's just something I myself need to do. Does it look like a bug?

[mc4man]

Don't believe this is a bug - the current version of libfontconfig1 in karmic is 2.6.0-1ubuntu12

You got 2.8.0-0ubuntu1 from somewhere, you'll need to get a matching libfontconfig1-dev from the same source (if even possible

Otherwise you should downgrade libfontconfig1 back to the karmic version


Edit - lok at the properties of libfontconfig1 in synaptic, may show who built it

[walkeraj]

Yeah, I thought that's what I was seeing with the "now" vs. "karmic" thing. Is there any way to tell where I got this one from? Is that stored anywhere?

[mc4man]

Is that stored anywhere?

As mentioned see what the properties of libfontconfig1 in synaptic say.

(you may be able to force the version back in synaptic - though it's possible something will break (if that version was installed as a dependency

There are some other possibilities if you can't locate the mayching -dev and don't want or can't downgrade

edit: also be aware that you may (most likely) have an updated fontconfig-config which would be a factor if downgrading - I would be careful in what you do

[walkeraj]

I looked at the properties in synaptic, but there wasn't anything to indicate where it came from, if not from Ubuntu. Where should I look for it? apt-cache show, maybe?

[walkeraj]

OK, so here's some more information:

$ apt-cache policy libfontconfig1
libfontconfig1:
  Installed: 2.8.0-0ubuntu1
  Candidate: 2.8.0-0ubuntu1
  Version table:
 *** 2.8.0-0ubuntu1 0
        100 /var/lib/dpkg/status
     2.6.0-1ubuntu12 0
        500 http://archive.ubuntu.com karmic/main Packages

Which is interesting, because if I run apt-cache policy against something like wine, I get:

$ apt-cache policy wine
wine:
  Installed: 1.1.43-0ubuntu1~karmicppa1
  Candidate: 1.1.43-0ubuntu1~karmicppa1
  Version table:
 *** 1.1.43-0ubuntu1~karmicppa1 0
        500 http://ppa.launchpad.net karmic/main Packages
        100 /var/lib/dpkg/status
     1.0.1-0ubuntu8 0
        500 http://archive.ubuntu.com karmic/universe Package

To my unfamiliar eye, this appears to mean that there is no information on where my version of libfontconfig1 came from? Is this correct? If I want to bring it back inline with karmic, what should I do? I attempted:

$ apt-get install libfontconfig1=2.6.0-1ubuntu12
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  libfontconfig1: Depends: fontconfig-config (= 2.6.0-1ubuntu12) but 2.8.0-0ubuntu1 is to be installed

Does this mean I need to walk backwards to downgrade it? I attempted 'force version' in synaptic as well, but nothing happened.