[Unstable Update] 2023-05-21 - Repository changes

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:information_source: OpenBLAS >= 0.3.23-2 update requires manual intervention

2023-06-14 - Felix Yan

The openblas package prior to version 0.3.23-2 doesn’t ship optimized LAPACK routine and CBLAS/LAPACKE interfaces for compatibility. This decision has been reverted now, and the ability to choose a different default system BLAS/LAPACK implementation while keeping openblas installed is now provided to allow future co-installation of BLIS, ATLAS, etc.

The default BLAS implementation will be used for most packages like NumPy or R. Please install blas-openblas and blas64-openblas to make OpenBLAS the default BLAS implementation, just like the old behavior.

Unfortunately you will get errors on updating if you currently have OpenBLAS installed as the default BLAS implementation:

error: failed to prepare transaction (could not satisfy dependencies)
:: installing openblas (0.3.23-2) breaks dependency 'blas' required by cblas
:: installing openblas (0.3.23-2) breaks dependency 'blas' required by lapack

Please append your preferred default BLAS implementation to the regular -Syu command line to get around it. For example:

sudo pacman -Syu blas-openblas

or

sudo pacman -Syu blas