Compile the amgcl as library in Linux

[RF3Dcode]

Hi, I would like to compile this amgcl as library (*.so) in Linux, and use it for my CFD code to solve large sparse linear system. Tried cmake and make, still does nothing.

Could you please write a short installation on how to compile amgcl and also some examples?

Thanks very much.

[ddemidov]

amgcl is header only. That is, you don't need to compile it into .so to use it; you can just include the headers into your own code.

[RF3Dcode]

Thanks Denis!

So the sparse matrix is stored as CSR in amgcl, and we can solve large sparse linear systems with either OpenMP or MPI, or even hybrid? e.g. use BiCGSTAB.

I will try to solve my Ax=B using this header only library.

best regards

On Tue, 8 Sep 2020 at 20:16, Denis Demidov notifications@github.com wrote:

amgcl is header only. That is, you don't need to compile it into .so to use it; you can just include the headers into your own code.

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[ddemidov]

MPI and non-MPI variants have different interfaces, but yes, you can use both kinds. You choose OpenMP, CUDA, OpenCL parallelization by selecting the appropriate backend. See examples in examples folder. Also, here is a simple example of using a BiCGStab solver preconditioned with smoothed aggregation AMG with SPAI0 smoother: https://gist.github.com/ddemidov/8c529aa2f2de75f297f3.

EDIT: I've just updated the gist to be compatible with the latest amgcl.