Looking for collaborators for an OpenModelica ebuild

penetrode

I am trying to put together an ebuild for OpenModelica: https://www.openmodelica.org/

There are packages for Debian and Ubuntu, but no ebuild yet for Gentoo, despite that fact that Modelica is gaining traction. The build is a little bit tricky. Before I try and do everything myself, I thought it wise to see if anyone else has an interest so that we might join forces.

A user (ilovekiruna) appeared on IRC a few days ago looking for assistance, but hasn't been back, and I have no way to contact him.

Anyway: if you have used OpenModelica or would like to use OpenModelica and would like to see an ebuild, reply to this message or get in touch with me privately.

NeddySeagoon · Posted: Tue Apr 14, 2015 8:26 pm Post subject:

penetrode,

Someone has made a start.
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NeddySeagoon

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penetrode · Posted: Wed Apr 15, 2015 7:48 am Post subject:

Yes, I had seen that one. It's six years old, and OpenModelica looks very different now. It might be better to start from scratch.

The biggest problem with it -- which is likely why there's still no ebuild or maintainer, even after all these years -- is that upstream actually recommends working with nightly builds. That's how "bleeding edge" we are here. So maybe it shouldn't go into the main tree, but into the science overlay instead. And yet, people still use it, and even the developers are running it in Linux (primarily Debian/Ubuntu, however).

But I'm getting ahead of myself. We have to have a working ebuild first, before we can talk about where it belongs

steveL · Posted: Wed Apr 15, 2015 11:50 am Post subject:

Naib · Posted: Thu Apr 16, 2015 7:00 pm Post subject:

I would be up for helping as I am trying to use Modelica as there is an industry drive to steer away from Matlab
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#define Int main()
#define Return printf
#define Print return
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HelloWorld Int {
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John R. Graham · Posted: Thu Apr 16, 2015 7:21 pm Post subject:

Naib · Posted: Thu Apr 16, 2015 9:09 pm Post subject:

penetrode · Posted: Thu Apr 16, 2015 9:21 pm Post subject:

This is good news, I'm glad to see there is interest.

As steveL pointed out, one has to have it building from ordinary sources, first, and at the moment I can't even get that far.

OpenModelica requires antlr, java, qt, and readline, as well as a library called paradiseo (for which I now have a simple ebuild that seems to work), plus LAPACK and BLAS.

I can make omc and mosh, but when I try to build the qtclients it fails:

leo-recover · n00b Joined: 11 May 2018 Posts: 12 Location: Italy

Hi,

I hope this is still the right place to post this.
I've been trying for some time to write a very simple ebuild for the latest openmodelica source code.
I'm able to compile and run the SW on my Gentoo installation by hand. When trying to run the ebuild though it fails.
From what I understood, this is related to the fact that the openmodelica makefile is trying to download from git and patch the modelica libraries during the build phase, and this is not allowed by the ebuild system.
Do you have some suggestions on how to overcome this issue?

Hu · Administrator Joined: 06 Mar 2007 Posts: 23364

All required files must be available locally before the build starts. Supporting files can be packaged as an archive, listed in SRC_URI, and then Portage will download them for you at the right time. You then use src_unpack to unpack them to the location the upstream build would have used if you let it do the download. If the upstream build system is polite, it will notice you have already provided the files and simply use them in place. If it is rude, it will ignore you and try to download anyway. In that case, you must patch it to be polite.

leo-recover · n00b Joined: 11 May 2018 Posts: 12 Location: Italy

I see, thanks for the explanation. I'm afraid that this will not be an easy task.
The upstream build system is doing this when making the libraries (extract from Makefile.libs):

Hu · Administrator Joined: 06 Mar 2007 Posts: 23364

That Makefile is amazingly bad and unreliable. Whoever wrote it should be ashamed of committing it. You said earlier that the dependent libraries are patched here, which would be even worse. I don't see that in the part you quoted, but on the assumption you were right, we will need to continue letting this project bundle the supporting libraries.

Fortunately, it should be pretty easy to bypass. Add to SRC_URI the zip archives of each of the supporting libraries. In src_unpack, extract those to the directories that this Makefile tries to use. In src_prepare, patch this Makefile to skip the checkout-git.sh call.

leo-recover · n00b Joined: 11 May 2018 Posts: 12 Location: Italy

Yes sorry, the part where they are patching the library is the following, for the Modelica library:

vince.ice · n00b Joined: 18 Jan 2019 Posts: 8 Location: Italy

Dear all,
here is my openmodelica ebuild. It builds just fine but it needs some expert revision.
What it does is cloning from github and recursively check out the "v1.13.2" tag, which represents the latest stable release.
I left all my comments in the ebuild file, so that it is easier to see what I did.
I also wrote 2 easy patches to fix fome bugs: paradiseo-cmake.patch and sundials-cmake.patch
Here the files, just put them in your local Portage overlay:

PLEASE NOTE: I am not an experienced portage/ebuild programmer. I only managed to write a couple of ebuilds and adapt another couple. So, I expect I made many mistakes. Nevertheless, I wrote the ebuild because I need OpenModelica and it was a pity Gentoo Science doesn't have it. I'd be proud If my attempt can be useful to the community.
Ciao to all