[Pw_forum] (no subject) - PARALLEL NVIRONMENT

[Giovanni Cantele]

Rudra Banerjee wrote:
> how can i compile parallel version of the executable?i have  mpich2 
> installed
Hi,
you should first make sure that mpich executables (mpif77,mpif90) are in 
you PATH.

Usually, just running
./configure
should be enough to detect a parallel environment and let the configure 
script to setup compilation for
the parallel version. The configure script generates a make.sys file, 
that should contain the
-D__MPI -D__PARA flags .

In the case for some reason the mpi stuff is not detected a message like
"Parallel environment not detected" should be output by the configure 
script.
There are cases in which this may happen, as some previous messages in 
the archive show, see for example

http://www.democritos.it/pipermail/pw_forum/2006-September/004973.html
http://www.democritos.it/pipermail/pw_forum/2006-September/004974.html
http://www.democritos.it/pipermail/pw_forum/2004-October/001507.html


You may also want to browse the "Installation" section of the 
Quantum-ESPRESSO Wiki:
http://www.quantum-espresso.org/wiki/index.php/Installation

If something goes wrong, try first to compile a sample program using the 
mpif90

Giovanni

-- 



Dr. Giovanni Cantele
Coherentia CNR-INFM and Dipartimento di Scienze Fisiche
Universita' di Napoli "Federico II"
Complesso Universitario di Monte S. Angelo - Ed. 6
Via Cintia, I-80126, Napoli, Italy
Phone: +39 081 676910
Fax:   +39 081 676346
E-mail: Giovanni.Cantele at na.infn.it
Web: http://people.na.infn.it/~cantele