[ET Trac] [Einstein Toolkit] #747: 9th order prolongation test fails with REAL_PRECISION=4

[Einstein Toolkit]

#747: 9th order prolongation test fails with REAL_PRECISION=4
--------------------+-------------------------------------------------------
 Reporter:  hinder  |       Owner:  eschnett
     Type:  defect  |      Status:  new     
 Priority:  major   |   Milestone:          
Component:  Carpet  |     Version:          
 Keywords:          |  
--------------------+-------------------------------------------------------
 If I set REAL_PRECISION=4 in my option list (single precision), Carpet
 will not run.  This is because it performs self-tests on startup of the
 prolongation operators, and my guess is that single precision is
 insufficient for the 9th order operators.

 {{{
 WARNING[L1,P0] (CarpetLib): Error in prolongate_3d_rf2::coeffs_3d_rf2
    RT=CCTK_REAL4
    ORDER=9
    n=6
    y0=0, res=9.53674e-07
 WARNING[L1,P0] (CarpetLib): Error in prolongate_3d_rf2::coeffs_3d_rf2
    RT=CCTK_REAL4
    ORDER=9
    n=6
    y0=0, res=9.53674e-07
 WARNING[L1,P0] (CarpetLib): Error in prolongate_3d_rf2::coeffs_3d_rf2
    RT=CCTK_REAL4
    ORDER=9
    n=8
    y0=0, res=1.52588e-05
 WARNING[L1,P0] (CarpetLib): Error in prolongate_3d_rf2::coeffs_3d_rf2
    RT=CCTK_REAL4
    ORDER=9
    n=8
    y0=0, res=1.52588e-05
 WARNING level 0 in thorn CarpetLib processor 0 host MacBook-2.local
   (line 98 of
 /Users/ian/Cactus/EinsteinToolkit/arrangements/Carpet/CarpetLib/src/prolongate_3d_rf2.cc):
   -> Aborting.
 WARNING level 0 in thorn CarpetLib processor 0 host MacBook-2.local
   (line 98 of
 /Users/ian/Cactus/EinsteinToolkit/arrangements/Carpet/CarpetLib/src/prolongate_3d_rf2.cc):
   -> Aborting.
 }}}

 I propose that the final warning should be changed to level 1 unless that
 order of prolongation has actually be requested for the run.  In my case,
 I'm doing unigrid and don't care about prolongation.  I don't know how to
 test the type (what type of object is "RT"?) in this template function.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/747>
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