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I'm trying to install libgdal-dev:

sudo apt-get install libgdal-dev

But it has unmet dependencies: Depends: libpng-dev

Which itself cannot be installed because:

libpng12-dev : Depends: libpng12-0 (= 1.2.54-1ubuntu1.1) but 1.2.54-5x0~ppa is to be installed

This package is installed from a ppa:

dpkg -s libpng12-0 | grep ^Maintainer
Maintainer: Otto Meier <[email protected]>

(via)

I want to keep that ppa as it provides GIMP 2.9.

Question:

  • How can I install libpng12-dev and libgdal-dev (maybe ignoring or manually changing certain dependencies) ?

  • or generally: How to install packages when dependency is already installed in another version from PPA ?

(Hint: Installing GIMP with Snap is neither preferred nor possible)

What I tried:

I installed libpng12-dev ignoring libpng12-0 dependecy (via):

apt download libpng12-dev
sudo dpkg --ignore-depends=libpng12-0 -i libpng12-dev_1.2.54-1ubuntu1.1_amd64.deb

This worked.
Also, libgdal-dev still had unmnet dependencies, so I did the same:

sudo apt install libgdal-dev
sudo dpkg --ignore-depends=libpng12-0 -i libgdal-dev_2.2.2+dfsg-1~xenial1_amd64.deb #png12-dev_1.2.54-1ubuntu1.1_amd64.deb

dpkg: dependency problems prevent configuration of libgdal-dev:
 libgdal-dev depends on libarmadillo-dev; however:
  Package libarmadillo-dev is not installed.
 libgdal-dev depends on libcurl4-gnutls-dev | libcurl-ssl-dev; however:
  Package libcurl4-gnutls-dev is not installed.
  Package libcurl-ssl-dev is not installed.
 libgdal-dev depends on libdap-dev; however:
  Package libdap-dev is not installed.
 libgdal-dev depends on libepsilon-dev; however:
  Package libepsilon-dev is not installed.
 libgdal-dev depends on libfreexl-dev; however:
  Package libfreexl-dev is not installed.
 libgdal-dev depends on libfyba-dev; however:
  Package libfyba-dev is not installed.
 libgdal-dev depends on libgeos-dev; however:
  Package libgeos-dev is not installed.
 libgdal-dev depends on libgeotiff-dev; however:
  Package libgeotiff-dev is not installed.
 libgdal-dev depends on libgif-dev; however:
  Package libgif-dev is not installed.
 libgdal-dev depends on libhdf4-alt-dev; however:
  Package libhdf4-alt-dev is not installed

So, I stopped here and fixed the situation again:

sudo dpkg -r libgdal-dev
sudo dpkg -r libpng12-dev
Improve this question
2
  • 1
    forgot about that, updated tags.
    – pLumo
    Aug 28, 2018 at 8:42
  • Thanks for the hint. Indeed that is the root cause of my problem => Leftovers from the ppa installed earlier.
    – pLumo
    Aug 28, 2018 at 9:38

1 Answer 1

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@dsstorefile1 gave the right hint to fix my issue:

The ppa I linked in the question was made for 16.04 when I installed it, but it changed and the the maintainer removed most packages for xenial including libpng12-0.

So this is how I fixed the situation:

  • Remove the ppa using ppa-purge:

    sudo ppa-purge ppa:otto-kesselgulasch/gimp

  • Downgrade the libpng12-0 package to the version from the official repos:

    sudo apt install libpng12-0=1.2.54-1ubuntu1.1

  • Install libgdal-dev:

    sudo apt install libgdal-dev

I also noticed that following packages are also leftovers from that ppa:

libbabl-0.1-0
libgegl-0.3-0
liblcms2
libwebp6

So, I also downgraded/removed these:

sudo apt install libbabl-0.1-0=0.1.16-1
sudo apt install libgegl-0.3-0=0.3.4-1ubuntu2
sudo apt install liblcms2-2=2.6-3ubuntu2
sudo apt remove libwebp6 #no candidate from repos
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3
  • 1
    While this fixes my issue, the general question is still open.
    – pLumo
    Aug 28, 2018 at 9:20
  • i followed your steps and i cannot get libpng12-0 package for artful, if that package for xenial, how i can get it sir?
    – abu-ahmed al-khatiri
    Aug 28, 2018 at 9:41
  • 1
    First of all artful is EOL. Then, why do you follow my steps at all if you don't have the same issue?
    – pLumo
    Aug 28, 2018 at 10:46

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