[ET Trac] [Einstein Toolkit] #1674: Switch to OpenBLAS

[Einstein Toolkit]

#1674: Switch to OpenBLAS
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  Reporter:  eschnett     |       Owner:                     
      Type:  enhancement  |      Status:  review             
  Priority:  major        |   Milestone:                     
 Component:  Other        |     Version:  development version
Resolution:               |    Keywords:                     
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Comment (by eschnett):

 It is dangerous to auto-detect existing BLAS libraries, because these are
 often just the reference BLAS. It is better to build OpenBLAS in this
 case, since building it is actually quite fast. The point of using
 OpenBLAS is to guarantee that we have an efficient BLAS implementation at
 hand, e.g. for people using PETSc.

 We could auto-detect existing BLAS libraries if we also auto-detect what
 kind it is (e.g. Atlas, OpenBLAS, reference BLAS, MKL, ...), but that is
 difficult, and we haven't done this before, so this shouldn't be a
 prerequisite.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1674#comment:7>
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