[MPICH] Replacing collective routines

[Georg Wassen]

Hi,

Darius, thanks a lot for your help - this was exactly what I was 
searching for.

> In order to set the coll_fns function when the communicator is created, 
> define MPID_Dev_comm_create_hook() to set it (or define it to a function 
> which sets it).  There's also a MPID_Dev_comm_destroy_hook() if you need 
> it.

I've done so like in your files but I've still a problem: The init-hook 
is only called, when a new communicator is created (e.g. 
MPI_Comm_split), not at the initial creation of MPI_COMM_WORLD. (I'm 
using nmpi-1.2 which is based on mpich2-1.0.2p1)

May this be a problem which is fixed in recent versions or are these 
hooks intended for new communicators only?

Kind regards,
Georg.