[ET Trac] [Einstein Toolkit] #1334: CCTK_CHECK_HEADER_LIB_FUNC adds library multiple times to $LIBS

[Einstein Toolkit]

#1334: CCTK_CHECK_HEADER_LIB_FUNC adds library multiple times to $LIBS
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 Reporter:  knarf   |       Owner:                     
     Type:  defect  |      Status:  new                
 Priority:  minor   |   Milestone:  ET_2013_05         
Component:  Cactus  |     Version:  development version
 Keywords:          |  
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 CCTK_CHECK_HEADER_LIB_FUNC (in aclocal.m4) adds its second argument to
 $LIBS, every time it is called. I found 8 invocations in configure.in,
 each time adding the math library, resulting in a very weird (but not
 necessarily wrong) link line in Cactus.

 I am not entirely sure about what to do here, but my best guess is that
 $LIBS shouldn't be changed at all after this function was called. An
 alternative would be to check for the existance of $2 in $LIBS before it
 is unconditionally added.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1334>
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