[ET Trac] [Einstein Toolkit] #456: Ensure functions are not defined twice

[Einstein Toolkit]

#456: Ensure functions are not defined twice
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  Reporter:  hinder       |       Owner:     
      Type:  enhancement  |      Status:  new
  Priority:  major        |   Milestone:     
 Component:  Cactus       |     Version:     
Resolution:               |    Keywords:     
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Comment (by eschnett):

 That would be straightforward.

 However, I do not think that this is about scheduled functions. Any
 function defined twice is an error. In most cases, it is a helper function
 that has a non-unique name when a thorn is copied (e.g. called
 SpatialDeterminant).

 The best solution would be to check while linking. Most linkers (at least
 the linux linkers) have options for this (--whole-archive). One would need
 to introduce new configuration variables, autoconf these, and then uses
 these while linking.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/456#comment:3>
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