Add spral linear solver on Linux

[traversaro]

This PR enables support for the spral linear solver (see https://coin-or.github.io/Ipopt/INSTALL.html#DOWNLOAD_SPRAL) on Linux, as for now spral on conda-forge is available just on Linux.

Beside modifications to enable the compilation and the tests, this PR also backports coin-or/Ipopt#677 to the feedstock, to ensure that mumps remain the default linear solver, has anyhow that will be the case in the next release of ipopt.

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[traversaro]

@conda-forge-admin, please rerender

[traversaro]

This will fail on arm and ppc, let's see if we can fix that with conda-forge/conda-forge-pinning-feedstock#4802 .

[traversaro]

@conda-forge/ipopt the PR is ready for review, thanks!

[traversaro]

@conda-forge/ipopt if there is no specific objection, I would like to merge this by the end of this week.

[bluescarni]

@traversaro sorry for not replying earlier...

If I understand correctly, for the conda package the SPRAL solver is not the default solver option right?

I am a bit concerned about the numerous hoops you had to go through to make the segfaults go away and the general attitude towards memory bugs as exemplified here:

ralna/spral#67

Other than that, looking good to me.

[traversaro]

If I understand correctly, for the conda package the SPRAL solver is not the default solver option right?

Exactly, this is correct. Without any specific intention, spral was made the default linear solver (if available) in ipopt upstream. However, this was fixed in coin-or/Ipopt#677 and I backported this fix here.

I explicitly make sure that by default ipopt works without any strange OMP_* env variable in the test script, where the test for the ipopt binary is running without setting env variable, see https://github.com/traversaro/ipopt-feedstock/blob/e79e47bbed6c7f81452b222eec147596a297bbcf/recipe/run_test.sh#L8 .

[edwardsun]

Hello, I just want to follow up on this feature.
link: mechmotum/cyipopt#233
In short, it seems cyipopt 1.3.0 on conda does not seem to allow "spral" linear solver yet, even explicitly specified.

[traversaro]

Can you open a new issue in the feedstock reporting the mamba list of the environment in which you have the problem? Thanks!

[edwardsun]

Hi, I'm not sure what you mean by saying "open a new issue in the feedstock". Is it just creating a new issue in the cyipopt repo? Thanks.

…

________________________________ From: Silvio Traversaro ***@***.***> Sent: Sunday, October 1, 2023 11:33 AM To: conda-forge/ipopt-feedstock ***@***.***> Cc: edwardsun ***@***.***>; Comment ***@***.***> Subject: Re: [conda-forge/ipopt-feedstock] Add spral linear solver on Linux (PR #94) Can you open a new issue in the feedstock reporting the mamba list of the environment in which you have the problem? Thanks! — Reply to this email directly, view it on GitHub<#94 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AACX3FTT6C3OQE44K3XJQQ3X5GEK3ANCNFSM6AAAAAA3UVZQYI>. You are receiving this because you commented.Message ID: ***@***.***>

[traversaro]

I mean open a new issue in this repo, thanks!