An implementation is allowed to implement MPI_AINT_ADD, PMPI_AINT_ADD, MPI_AINT_DIFF, and PMPI_AINT_DIFF, and no others, as macros in C.
Advice
to implementors.
Implementors should document which routines are implemented as macros.
( End of advice to implementors.)
Advice to users.
If these routines are implemented as macros, they will not work with the MPI
profiling interface.
( End of advice to users.)