[ET Trac] [Einstein Toolkit] #1851: HDF5 won't configure on Fedora

[Einstein Toolkit]

#1851: HDF5 won't configure on Fedora
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  Reporter:  sbrandt  |       Owner:  sbrandt            
      Type:  defect   |      Status:  review             
  Priority:  unset    |   Milestone:                     
 Component:  Other    |     Version:  development version
Resolution:           |    Keywords:                     
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Comment (by rhaas):

 Replying to [comment:9 eschnett]:
 > This patch has an error, there's a missing {{{-a}}} in the {{{if}}}
 statement.
 >
 > Also, other external libraries (e.g. {{{Boost}}}) use a different
 condition for setting the {{{INC_DIRS}}}, {{{LIB_DIRS}}}, and {{{LIBS}}}
 variable: Autodetection happens depending on the values of the {{{DIR}}}
 variable (and independent of the three specific variables), and if any of
 the variables is unset, it is set to the autodetected value.
 >
 > This has the following advantage: If you set e.g. {{{HDF5_DIR}}} to a
 specific value, then this value is used to set {{{HDF5_INC_DIRS}}},
 {{{HDF5_LIB_DIRS}}}, and {{{HDF5_LIBS}}}. If any of these three values is
 wrong, you can overwrite it, without affecting the values of the other
 variables. This has been like this in Cactus for a long time.
 >
 > As is, if you set {{{HDF5_INC_DIRS}}}, then {{{HDF5_LIBS}}} is left
 empty.

 ExternalLibraries are inconsistent at best in how they handle this. I
 checked MPI (perl) and GSL (monolithic shell) and both assume a full
 manual configuration if one of the LIBS variables is set. For now I would
 keep it this way and make all libraries uniform once we use a common
 framework.

-- 
Ticket URL: <https://trac.einsteintoolkit.org/ticket/1851#comment:21>
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