[ET Trac] [Einstein Toolkit] #513: Make signbit in Vectors work on more architectures

[Einstein Toolkit]

#513: Make signbit in Vectors work on more architectures
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 Reporter:  eschnett               |       Owner:     
     Type:  defect                 |      Status:  new
 Priority:  major                  |   Milestone:     
Component:  EinsteinToolkit thorn  |     Version:     
 Keywords:                         |  
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 Several C++ compilers cannot handle std::signbit. There is also a
 namespace problem when using the same identifier Vectors_SGN for different
 precisions (real*4 and real*8). In addition, kifpos is implemented
 incorrectly on several architectures. The attached patch corrects these.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/513>
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