Re: [Boost-users] A default constructor for Boost.MPI environment?

13 Dec 2006

      Hi,

On Wed, 13 Dec 2006 13:26:21 -0500
Douglas Gregor  wrote:
...
I'll be happy to provide the default constructor, but it will only be
available when we can be sure that it can be implemented correctly,
either because we've checked out a particular MPI implementation
(e.g., LAM-MPI does not need the real argc/argv) or it claims to be
MPI-2 compliant.
Open-MPI (the successor of LAM-MPI) is MPI-2 compliant.
...
I'll add a new macro
"BOOST_MPI_HAS_DEFAULT_ENVIRONMENT" that is used to indicate that the
default constructor exists.
MPI 1.2 defines the macros MPI_VERSION and MPI_SUBVERSION, which could
be used to detect, if

MPI_Init(0, 0);

is a valid function call, that could be used to implement a default
constructor.

	Heiko

-- 
-- It is not even wrong.  (Wolfgang Pauli, 1900-1958)
-- Cluster Computing @ http://www.clustercomputing.de
--       Heiko Bauke @ http://www.physics.ox.ac.uk/users/bauke