ndarray-linalg

Linear algebra package for Rust with ndarray based on external LAPACK implementations.

Examples

See examples directory.

Note: To run examples, you must specify which backend will be used (as described below). For example, you can execute the solve example with the OpenBLAS backend like this:

cargo run --example solve --features=openblas

and run all tests of ndarray-linalg with OpenBLAS

cargo test --features=openblas

Backend Features

There are three LAPACK source crates:

ndarray_linalg must link just one of them for LAPACK FFI.

[dependencies]
ndarray = "0.14"
ndarray-linalg = { version = "0.13", features = ["openblas-static"] }

Supported features are following:

Feature	Link type	Requirements	Description
openblas-static	static	gcc, gfortran, make	Build OpenBLAS in your project, and link it statically
openblas-system	dynamic/static	libopenblas-dev	Seek OpenBLAS in system, and link it
netlib-static	static	gfortran, make	Same as openblas-static except for using reference LAPACK
netlib-system	dynamic/static	liblapack-dev	Same as openblas-system except for using reference LAPACK
intel-mkl-static	static	(pkg-config)	Seek static library of Intel MKL from system, or download if not found, and link it statically
intel-mkl-system	dynamic	(pkg-config)	Seek shared library of Intel MKL from system, and link it dynamically

You must use just one feature of them.
dynamic/static means it depends on what is found in the system. When the system has /usr/lib/libopenblas.so, it will be linked dynamically, and /usr/lib/libopenblas.a will be linked statically. Dynamic linking is prior to static linking.
Requirements notices:
- gcc and gfortran can be another compiler, e.g. icc and ifort.
- libopenblas-dev is package name in Debian, Ubuntu, and other derived distributions. There are several binary packages of OpenBLAS, i.e. libopenblas-{openmp,pthread,serial}-dev. It can be other names in other distributions, e.g. Fedora, ArchLinux, and so on.
- pkg-config is used for searching Intel MKL packages in system, and it is optional. See intel-mkl-src/README.md for detail.

For library developer

If you creating a library depending on this crate, we encourage you not to link any backend:

[dependencies]
ndarray = "0.13"
ndarray-linalg = "0.12"

The cargo's feature is additive. If your library (saying lib1) set a feature openblas-static, the application using lib1 builds ndarray_linalg with openblas-static feature though they want to use intel-mkl-static backend.

See the cargo reference for detail

Tested Environments

Only x86_64 system is supported currently.

Backend	Linux	Windows	macOS
OpenBLAS	✔️	-	-
Netlib	✔️	-	-
Intel MKL	✔️	✔️	✔️

License

CAUTION Be sure that if you use intel-mkl-src backend, you have to accept Intel Simplified Software License in addition to the MIT-License or Apache-2.0 License.