[ET Trac] [Einstein Toolkit] #669: Rewrite users of deprecated HDF5 C++ API

[Einstein Toolkit]

#669: Rewrite users of deprecated HDF5 C++ API
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  Reporter:  eschnett  |       Owner:          
      Type:  task      |      Status:  reopened
  Priority:  minor     |   Milestone:          
 Component:  Other     |     Version:          
Resolution:            |    Keywords:          
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Comment (by rhaas):

 ':=' actually assigns default values (see the bash man page). So as long
 as the line Ian quoted is the first one where the variable appears
 everything after that has well defined default values. Bash's syntax is
 definitely rather strange. A less below-the-radar way of setting defaults
 would be something like:
 {{{
 : ${HDF5_ENABLE_CXX:=yes}
 }}}
 (note the ':' at the beginning of the line).

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/669#comment:7>
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