[ET Trac] [Einstein Toolkit] #1708: Add autoconf detection for #pragma omp simd

[Einstein Toolkit]

#1708: Add autoconf detection for #pragma omp simd
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  Reporter:  eschnett     |       Owner:                     
      Type:  enhancement  |      Status:  new                
  Priority:  major        |   Milestone:                     
 Component:  Cactus       |     Version:  development version
Resolution:               |    Keywords:                     
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Comment (by eschnett):

 It's "#pragma omp simd", so it's an OpenMP pragma. Compilers recognize the
 "omp", but the don't recognize the "simd" -- fatal error.

 Some compilers support "#pragma simd", but not all; e.g. Clang understands
 "#pragma omp simd", but ignores "#pragma simd".

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1708#comment:2>
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