[petsc-dev] PETSC_DESIRE_COMPLEX vs <petsccomplex.h>

Barry Smith bsmith at mcs.anl.gov
Mon Jul 28 11:58:50 CDT 2014

On Jul 28, 2014, at 10:39 AM, Jed Brown <jed at jedbrown.org> wrote:

> Can we loosen the order-dependence so that instructions can be
>  #include <petsccomplex.h>
> instead of defining PETSC_DESIRE_COMPLEX in the compilation unit?  I
> think the include is more natural and less error-prone.

  Where petsccomplex.h  simply defines PETSC_DESIRE_COMPLEX?  

   And what happens if petsccomplex.h is included after petscsys.h it will have no affect? Should it generate an error if not defined first?

  So petsccomplex.h in pseudo code would be 

      #if defined(__PETSCMATH_H)
      #error   must include petsccomplex.h BEFORE other petsc include files

   Seems reasonable to me.


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