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cmannett85's questions

Martin Hope
cmannett85
Asked: 2020-07-12 00:57:23 +0800 CST
  • 1

I'm creating a deb package for the first time (using CPack, but I don't think that's relevant), and I'm confused by dependent package versioning. My application depends on 2 Boost libraries and I need a minimum of v1.71, so I thought I could just use this string:

"libboost-program_options (>= 1.71), libboost-log (>= 1.71)"

But it turns out those packages have the version in their name! So I have to use this string in order to get the package to install at all:

"libboost-program_options1.71.0 (>= 1.71), libboost-log1.71.0  (>= 1.71)"

Which renders the minimum versioning specification useless. So now if someone has v1.73 of the libraries installed, which would be perfectly fine, apt would fail to meet the dependencies!

How do 'real' package maintainers solve this problem?

package-management versions deb
Martin Hope
cmannett85
Asked: 2019-10-13 23:18:37 +0800 CST
  • 7

When running Ubuntu 19.04, I'm trying to install ardour, but apt is requesting to uninstall GIMP:

$ sudo apt install ardour
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  gimp-data libamd2 libass9 libbabl-0.1-0 libbs2b0 libcamd2 libccolamd2 libcholmod3 libde265-0 libflite1 libgegl-common libheif1 libmetis5 libmng2 libmypaint-1.3-0 libmypaint-common libmysofa0 libnorm1
  libpgm-5.2-0 libraw19 libumfpack5 libvidstab1.1 libzmq5
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  ardour-data
Suggested packages:
  jamin
Recommended packages:
  ardour-video-timeline
The following packages will be REMOVED
  gimp gstreamer1.0-libav libavfilter7 libgegl-0.4-0 libgimp2.0 libpostproc55 libswscale5
The following NEW packages will be installed
  ardour ardour-data
0 to upgrade, 2 to newly install, 7 to remove and 1 not to upgrade.
Need to get 9,885 kB of archives.
After this operation, 20.9 MB of additional disk space will be used.
Do you want to continue? [Y/n] n

Why is apt trying to get me to uninstall GIMP (amongst other things) when trying to install ardour?

apt-cache output:

$ apt-cache policy gimp gimp-data ardour
gimp:
  Installed: 2.10.8-2
  Candidate: 2.10.8-2
  Version table:
 *** 2.10.8-2 500
        500 http://gb.archive.ubuntu.com/ubuntu disco/universe amd64 Packages
        100 /var/lib/dpkg/status
gimp-data:
  Installed: 2.10.8-2
  Candidate: 2.10.8-2
  Version table:
 *** 2.10.8-2 500
        500 http://gb.archive.ubuntu.com/ubuntu disco/universe amd64 Packages
        500 http://gb.archive.ubuntu.com/ubuntu disco/universe i386 Packages
        100 /var/lib/dpkg/status
ardour:
  Installed: (none)
  Candidate: 1:5.12.0-3
  Version table:
     1:5.12.0-3 500
        500 http://gb.archive.ubuntu.com/ubuntu disco/universe amd64 Packages

Repository list:

$ grep -r ^deb /etc/apt/ --include="*.list"
/etc/apt/sources.list:deb http://gb.archive.ubuntu.com/ubuntu/ disco main restricted
/etc/apt/sources.list:deb http://archive.ubuntu.com/ubuntu/ disco-updates main restricted
/etc/apt/sources.list:deb http://gb.archive.ubuntu.com/ubuntu/ disco universe
/etc/apt/sources.list:deb http://gb.archive.ubuntu.com/ubuntu/ disco multiverse
/etc/apt/sources.list.d/google-chrome.list:deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
/etc/apt/sources.list.d/spotify.list:deb http://repository.spotify.com stable non-free
/etc/apt/sources.list.d/vscode.list:deb [arch=amd64] http://packages.microsoft.com/repos/vscode stable main
apt gimp ardour