ocaml-maint team mailing list archive

[Mick <1568459@xxxxxxxxxxxxxxxxxx>]

This may help.
After upgrading my Desktop from Mint19 to Mint20 I could not get unison
file sync working to my Ubuntu Server.  With some help from the guys on
the GitHub issues list I have now fixed it. Apparently unison for
Ubuntu19 and Mint20 are compiled differently, and even though they are
both version 2.48.4 they are compiled with different releases of OCaml,
which makes them incompatible.
This is what I did -
Remove all traces of unison
then run 
wget http://mirrors.kernel.org/ubuntu/pool/universe/u/unison/unison_2.48.4-1ubuntu1_amd64.deb
wget http://mirrors.kernel.org/ubuntu/pool/universe/u/unison/unison-gtk_2.48.4-1ubuntu1_amd64.deb
sudo dpkg -r unison		this removes the old install
sudo dpkg -i unison_2.48.4-1ubuntu1_amd64.deb
sudo dpkg -i unison-gtk_2.48.4-1ubuntu1_amd64.deb
sudo apt-mark hold unison		this stops it updating 
sudo apt-mark hold unison-gtk

This is not a proper solution it is just a fix, but it did get me out of a hole :)
Mick

-- 
You received this bug notification because you are a member of Debian
OCaml Maintainers, which is subscribed to unison in Ubuntu.
https://bugs.launchpad.net/bugs/1568459

Title:
  unison incompatible with older ubuntu/debian versions

Status in unison package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  16.04 comes with a new version of unison, which is great.

  Unfortunately, it comes just with that new version, not older ones.
  Unison can synchronize only with precisely the same version on the
  peer, not interact with others. Therefore a 16.04 machine cannot sync
  to any older linux (ubuntu,debian,...), especially not to servers
  running 14.04.

  Older versions of ubuntu therefore came with different versions of
  unison, i.e. at least the version of the last LTS version to keep it
  functional and to have new clients work with older (but still
  supported) LTS servers.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: unison 2.48.3-1ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
  Uname: Linux 4.4.0-18-generic x86_64
  ApportVersion: 2.20.1-0ubuntu1
  Architecture: amd64
  CurrentDesktop: LXDE
  Date: Sun Apr 10 10:20:04 2016
  Dependencies:
   gcc-6-base 6-20160405-0ubuntu1
   libc6 2.23-0ubuntu2
   libgcc1 1:6-20160405-0ubuntu1
  SourcePackage: unison
  UpgradeStatus: Upgraded to xenial on 2016-04-06 (4 days ago)

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