[ET Trac] [Einstein Toolkit] #831: Cactus FAQ is out of date

[Einstein Toolkit]

#831: Cactus FAQ is out of date
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  Reporter:  hinder          |       Owner:  dcastl2   
      Type:  defect          |      Status:  accepted  
  Priority:  major           |   Milestone:  ET_2012_11
 Component:  Cactus website  |     Version:            
Resolution:                  |    Keywords:            
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Comment (by rhaas):

 I would like to suggest a FAQ item concerning the interaction of
 environment variables and make. Something along the lines:

 ----

 The compilation aborts with "error: /usr/lib/lib: No such file or
 directory". What is happening?

 It is possible that there is an unintended interaction between options in
 your option list and environment variables. When using ExternalLibraries
 thorns, you should check that you do not have any environment variables
 <LIBRARY_NAME>_DIR set (eg. HDF5_DIR), since they will override settings
 in the option list. A typical example is "HDF5_DIR=/usr/lib" while Cactus
 would expect "HDF5_DIR=/usr". Most likely the options is set in your shell
 initialization files (.bashrc, .cshrc, .profile etc). To remove it
 permanently you will have to edit those files. For an ongoing session (or
 if the variable is set by the sysadmin) you can use "unset HDF5_DIR".

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 It might also be a good idea to regularly post the FAQ URL on the mailing
 list (say once a month). That might also serve as an incentive to keep it
 up to date.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/831#comment:7>
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