CoinMP Solver not Available, option requires coinmp to be promoted

I see that CoinMP support was disabled in Ubuntu (it is enabled in Debian) 5 years ago¹, because of dependency issues. This could/should probably be revisited.

¹ https://git.launchpad.net/~libreoffice/ubuntu/+source/libreoffice/commit/?h=ubuntu-groovy-7.0&id=3d9c888b38a35b39f282e6aedfd4ad6d447faf0b

Ok so looks like CoinMP was disabled in 2015 but then Rene re-eneabled it only a few months ago:

https://git.launchpad.net/~libreoffice/ubuntu/+source/libreoffice/commit/?h=ubuntu-groovy-7.0&id=8a5d2a1162dbacd05a656eea7ce6b4769ab568bb

However, this is for groovy - the only series for which we've published _in the archive_ a 7.X version of Libreoffice. Rafael, are you using the snap or perhaps you can point to the PPA that is providing your Libreoffice debs?

Heather, this is not groovy-specific. It was re-enabled recently in Debian, but the Ubuntu packages have additional logic that override this, and force-disable it. See the commit I linked to in comment #1, which is inside a [ifeq "$(DEB_VENDOR)" "Ubuntu"] conditional.

> which is inside a [ifeq "$(DEB_VENDOR)" "Ubuntu"] conditional.

Ah yes darn I missed this. Thanks for that :)

Without a reason of why CoinMP was disabled in 2015, I don't have a basis to go off on to re-evaluate enabling it. We could revert the patch Olivier mentioned in comment 1 to close this bug but could be reintroducing an old issue. Olivier/Seb, your suggestions?

The usual reason is 'the package is in universe so we can't use it yet, the MIR process takes time and we don't want to be blocked so let's disable so we can get things rolling' but I don't have more background information on whether there was a specific reason, I will let Olivier comment

Unfortunately, the commit I linked to in comment #1 doesn't explain why coinmp support was disabled. The most likely reason is what Séb wrote, that a package in main cannot depend on a package in universe, and promoting a dependency from universe to main can be a tedious and time-consuming process.

Before going ahead with the MIR, I suggest listing all of coinmp's direct and indirect dependencies, and checking whether there are known bugs affecting these packages (in Ubuntu and Debian).

Would be nice to provide but it doesn't seem important enough for rls tracking at this point

I think it'd be worth testing whether libreoffice-calc can be built with coinmp support (build dependencies don't have to be in main) and still function without the dependency installed (i.e. runtime detection).

Well I removed the "ENABLE_COINMP := n" from the "ifeq "$(DEB_VENDOR)" "Ubuntu"" block and launched an amd64 build and it failed with:

dpkg-shlibdeps: error: no dependency information found for /<<PKGBUILDDIR>>/debian/libreoffice-core/usr/lib/libreoffice/program/libCoinMP.so.1 (used by debian/libreoffice-calc/usr/lib/libreoffice/program/libsolverlo.so)

The PPA where this built:
https://launchpad.net/~hellsworth/+archive/ubuntu/lo-coinmp

The full PPA build log is here:
https://launchpadlibrarian.net/509651435/buildlog_ubuntu-hirsute-amd64.libreoffice_1%3A7.0.3-0ubuntu3_BUILDING.txt.gz

It looks like this libCoinMP.so.1 is provided by the coinor-libcoinmp1v5 package. I can try to add this as a depends, rebuild, and see if we get further.

I've built Libreoffice with coinmp support and all of the Libreoffice applications seem to run just fine.

@Rafael, would you mind trying to use the CoinMP linear solver as you'd like and provide feedback? The patched packages are in this ppa:

https://launchpad.net/~hellsworth/+archive/ubuntu/lo-coinmp/

Hi Heather! I was not able to install LibreOffice using this PPA. When I enter:

sudo add-apt-repository ppa:hellsworth/lo-coinmp

I get the following error:

Err:22 http://ppa.launchpad.net/hellsworth/lo-coinmp/ubuntu groovy Release
  404 Not Found [IP: 91.189.95.83 80]
Hit:23 http://security.ubuntu.com/ubuntu groovy-security InRelease
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/hellsworth/lo-coinmp/ubuntu groovy Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Maybe this is because I'm running Ubuntu 20.10 Groovy and you built LibreOffice for 21.04 Hirsuite. Will I need to install a 21.04 daily build to test the new LibreOffice package? Or is there another way for me to download and test it?

MIR required for binary packages of the following source packages:
  coinmp, coinor-cbc, coinor-cgl, coinor-osi, coinutils, clp

libreoffice in hirsute-proposed built with coinmp support
  https://launchpad.net/ubuntu/+source/libreoffice/1:7.0.4~rc2-0ubuntu1

The PPA builds for bionic, focal and hirsute in https://launchpad.net/~libreoffice/+archive/ubuntu/libreoffice-prereleases are built with enabled coinmp support now.

This bug was fixed in the package libreoffice - 1:7.0.4~rc2-0ubuntu2

---------------
libreoffice (1:7.0.4~rc2-0ubuntu2) hirsute; urgency=medium

  * Revert "Re-enable coinmp (LP: #1905422)" until MIR is sorted out

 -- Rico Tzschichholz <email address hidden> Mon, 14 Dec 2020 10:05:19 +0100

So I've been using LO from the fresh PPA (https://launchpad.net/~libreoffice/+archive/ubuntu/ppa) and it does not come with CoinMP enabled.

Is there any particular package that I need to install to make CoinMP work with LibreOffice on Ubuntu?

Or is this a bug and we should reopen the ticket?