4.17 Functions and Macros

An implementation is allowed to implement MPI_WTIME, MPI_WTICK, PMPI_WTIME, PMPI_WTICK, and the handle-conversion functions (MPI_Group_f2c, etc.) in Section 4.12.4, 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.)

MPI-Standard for MARMOT