Ensure string lengths are provided as arguments when calling BLAS/LAPACK Fortran APIs from C

[kgryte]

Checklist

Please ensure the following tasks are completed before filing a bug report.

• Read and understood the Code of Conduct.
• Searched for existing issues and pull requests.

Description

Description of the issue.

As discussed elsewhere,

• https://developer.r-project.org/Blog/public/2019/05/15/gfortran-issues-with-lapack/
• C Fortran ABI issues with character arguments scipy/scipy#10335
• https://lwn.net/Articles/791393/

a bug arose due to changes in the GFortran compiler when calling from C into Fortran in the reference BLAS/LAPACK implementations. We should be aware of this bug, as we work to include BLAS wrappers in the codebase.

Related Issues

Does this issue have any related issues?

No.

Questions

Any questions for reviewers?

No.

Other

Any other information relevant to this issue? This may include screenshots, references, stack traces, sample output, and/or implementation notes.

N/A

[kgryte]

cc @aman-095 @Pranavchiku Just flagging in case it comes up later.