[ET Trac] [Einstein Toolkit] #1173: ExternalLibraries build environment problems

[Einstein Toolkit]

#1173: ExternalLibraries build environment problems
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  Reporter:  hinder                 |       Owner:            
      Type:  defect                 |      Status:  review    
  Priority:  major                  |   Milestone:            
 Component:  EinsteinToolkit thorn  |     Version:            
Resolution:                         |    Keywords:  zlib hwloc
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Comment (by hinder):

 One could use NO_BUILD in any case where the autodetection fails.  This
 could be, for example, if the library is installed in a system location
 for which the linker has been correctly configured but is not one of the
 locations that the library-thorn writer thought of.  For example, in
 Ubuntu, I found that libraries were installed in /usr/lib/x86_64-linux-gnu
 rather than /usr/lib.

 I disagree that we want to abort if ZLIB_DIR = NO_BUILD.  Currently, I set
 NO_BUILD because we cannot determine the correct directory, but the
 compiler and linker know it already.  Ideally, we would probe this case by
 compiling and running a test program, but we don't do that yet. Linking
 will not necessarily fail if we don't know the location; the linker might
 know this itself.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1173#comment:6>
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