Add support for cktso

[mzy2240]

https://github.com/chenxm1986/cktso

In my preliminary comparison, it is much faster than KLU on solving multi-vector rhs.

[ChrisRackauckas]

That sounds like a good idea. Do you have a code using it from Julia? I don't know of a Julia wrapper.

[mzy2240]

I am currently calling the C-API directly like this. From my experience it is quite straightforward to get it supported in Julia.

using CEnum

mutable struct __cktso_l_dummy end

const ICktSo_L = Ptr{__cktso_l_dummy}

const _libcktso = joinpath(dirname(@__FILE__),"libcktso_l.so")

function CKTSO_L_CreateSolver(inst, iparm, oparm)
    ccall((:CKTSO_L_CreateSolver, _libcktso), Cint, (Ptr{ICktSo_L}, Ptr{Ptr{Cint}}, Ptr{Ptr{Clonglong}}), inst, iparm, oparm)
end

[ChrisRackauckas]

Could you try making a first version similar to https://github.com/SciML/LinearSolve.jl/blob/main/ext/LinearSolveMetalExt.jl ? I'd be happy to finish it, though I don't know how to set this solver up well, so your expertise of how to call it could help get this done quickly. Does this already have a Yggdrasil JLL?

[mzy2240]

No it does not have a JLL yet. I don’t have any experience creating a JLL unfortunately.

[mzy2240]

Also just saw this news from Dr. Davis: DrTimothyAldenDavis/SuiteSparse#448. Might worth to add the support for ParU since UMFPACK is already supported.

[ChrisRackauckas]

oh that's great news. That should be a separate issue though.