[request] lapack/3.9.0

[leha-bot]

Package Details

• Package Name/Version: lapack/3.9.0
• Website: https://netlib.sandia.gov/lapack/
• Source code: https://github.com/Reference-LAPACK/lapack

Description Of The Library / Tool

LAPACK is a library of Fortran subroutines for solving the most commonly occurring problems in numerical linear algebra.

Additional info

The almost perfect recipe of Lapack's version 3.7.1 is available at archived conan-community repository
I think we should move it to conan-center to continue recipe polish :)

[mydatamodels]

We have ported the community recipe but the CI can't build it because gfortran is missing.
We have removed system_requirements() because of https://github.com/conan-io/conan-center-index/blob/master/docs/error_knowledge_base.md#kb-h032-system-requirements but we don't know how to proceed at the moment.

[Croydon]

Yes, we first need a package for fortran. That is the reason why a recipe for lapack is stalling

[samuel-emrys]

I'm the first to confess I don't know a lot about lapack, so forgive me if this is an ignorant question, but is the gfortran blocker resolved by #4249?

[ruilvo]

And we already have LLVM, is it packaging FLang?

[leha-bot]

I think that we should add another languages support in the future for Conan itself, e.g., for Fortran, some c++ dialects like Cuda, MPI (actually a c/c++/Fortran with some additional flags)

[mydatamodels]

I'm the first to confess I don't know a lot about lapack, so forgive me if this is an ignorant question, but is the gfortran blocker resolved by #4249?

We used the gfortran package as a requirement but now the code that has lapack as dependency doesn't build anymore, because in the gfortran recipe fPIC is not used, and there is no option to use a shared library. In production we use the shared library, anyway.

Honestly we are waiting to see how they are going to solve with OpenBLAS: #1867

Personally we'd prefer to use the same fortran compiler of the gcc suite we're using, or maybe flang, and not one imposed by the package manager, but maybe we are a minority, i don't know.

[samuel-emrys]

This statement in #4696 seems to indicate that gfortran is being made available in Conan Docker Tools (so available in the CI?) - it seems like the fortran compiler dependency might be able to be offloaded as a system requirement. Presumably this will allow this issue to progress forward with a new PR?

Edit: no it doesn't: #4696 (comment)