Introduction

MPI_ALLTOALLW

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This item was rejected as breaking existing user programs and implementations. Several alternatives that address the binding problem are (at the time of this writing) still under discussion.
The displacements in MPI_ALLTOALLW are in bytes but the language binding uses int and INTEGER instead of MPI_Aint and INTEGER (KIND=MPI_ADDRESS_KIND).
Proposed text

MPI-2, page 165, lines 25-38 read

int MPI_Alltoallw(void *sendbuf, int sendcounts[], int sdispls[], 
              MPI_Datatype sendtypes[], void *recvbuf, int recvcounts[], 
              int rdispls[], MPI_Datatype recvtypes[], MPI_Comm comm) 

MPI_ALLTOALLW(SENDBUF, SENDCOUNTS, SDISPLS, SENDTYPES, RECVBUF, RECVCOUNTS, 
              RDISPLS, RECVTYPES, COMM, IERROR) 
<type> SENDBUF(*), RECVBUF(*)
INTEGER SENDCOUNTS(*), SDISPLS(*), SENDTYPES(*), RECVCOUNTS(*), 
RDISPLS(*), RECVTYPES(*), COMM, IERROR 

void MPI::Comm::Alltoallw(const void* sendbuf, const int sendcounts[], 
             const int sdispls[], const MPI::Datatype sendtypes[], void* 
             recvbuf, const int recvcounts[], const int rdispls[], const 
             MPI::Datatype recvtypes[]) const = 0 

but should read

int MPI_Alltoallw(void *sendbuf, int sendcounts[], MPI_Aint sdispls[], 
              MPI_Datatype sendtypes[], void *recvbuf, int recvcounts[], 
              MPI_Aint rdispls[], MPI_Datatype recvtypes[], MPI_Comm comm) 

MPI_ALLTOALLW(SENDBUF, SENDCOUNTS, SDISPLS, SENDTYPES, RECVBUF, RECVCOUNTS, 
              RDISPLS, RECVTYPES, COMM, IERROR) 
<type> SENDBUF(*), RECVBUF(*)
INTEGER SENDCOUNTS(*), SENDTYPES(*), RECVCOUNTS(*), RECVTYPES(*), COMM, IERROR 
INTEGER (KIND=MPI_ADDRESS_KIND) SDISPLS(*), RDISPLS(*)

void MPI::Comm::Alltoallw(const void* sendbuf, const int sendcounts[], 
             const MPI::Aint sdispls[], const MPI::Datatype sendtypes[], 
             void* recvbuf, const int recvcounts[], const MPI::Aint rdispls[],
             const MPI::Datatype recvtypes[]) const = 0 

These modifications also need to be made in MPI-2, Appendix A.6.4, A.7.4, A.8.4:

• page 312, line 34 (C)
• page 322, line 41 (Fortran)
• page 335, line 16 (C++)