Not sure if this is the correct place for this kind of question, but: is there any plan for supporting features coming from mpi 2 standard (im basically thinking about spawning child processes from an initialized mpi parent).

PS: i know you explicitly say there is no intention in implementing mpi 2 support, but the readme is quite old.

This might be painful, as the 'plain' install of mpich2 does not include mpicc.

Hi I built mpich from version mpich-4.0.2 (stable release).

build mpich

./configure --prefix=/home/bill/lab/mpich-install --disable-fortran --
disable-cxx 2>&1 | tee c.txt
make 2>&1 | tee m.txt
make install 2>&1 | tee mi.txt

export PATH=${PATH}:/home/bill/lab/mpich-install/bin

build Parallel::MPI::Simple

curl -L -o - http://www.cpan.org/authors/id/A/AJ/AJGOUGH/Parallel-MPI-Simple-0.10.tar.gz | tar xz
cd Parallel-MPI-Simple-0.10/
perl Makefile.PL INSTALL_BASE=/home/bill/lab/perl-libs INC="-I/home/bill/lab/mpich-install/include"
make
make install

use Parallel::MPI::Simple

export PERL5LIB=/home/bill/lab/perl-libs/lib/perl5/x86_64-linux-thread-multi/

#!/usr/bin/perl
use Parallel::MPI::Simple

./parallel.py
Can't load '/home/bill/lab/perl-libs/lib/perl5/x86_64-linux-thread-multi//auto/Parallel/MPI/Simple/Simple.so' for module Parallel::MPI::Simple: /home/bill/lab/perl-libs/lib/perl5/x86_64-linux-thread-multi//auto/Parallel/MPI/Simple/Simple.so: undefined symbol: MPI_Gather at /usr/lib64/perl5/DynaLoader.pm line 193.
at /home/bill/lab/parallel.py line 4.
Compilation failed in require at /home/bill/lab/parallel.py line 4.
BEGIN failed--compilation aborted at /home/bill/lab/parallel.py line 4.

I can kind of see the header is in the so
trings /home/bill/lab/perl-libs/lib/perl5/x86_64-linux-thread-multi//auto/Parallel/MPI/Simple/Simple.so | grep -i MPI_Gather
MPI_Gather

Some systems (e.g. windows mpich2 install) do not have mpirun, just mpiexec. Look for both.