[ET Trac] [Einstein Toolkit] #535: Add autoconf macro to test C99 style variable declarations

[Einstein Toolkit]

#535: Add autoconf macro to test C99 style variable declarations
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 Reporter:  eschnett     |       Owner:     
     Type:  enhancement  |      Status:  new
 Priority:  major        |   Milestone:     
Component:  Cactus       |     Version:     
 Keywords:               |  
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 Many compilers don't support C99 style variable declarations in their
 default settings. We should test this, add certain flags automatically if
 we can, or abort with a clear error message otherwise.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/535>
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