[Beowulf] An Ask about Compilation

matheus reimann mgrhferlamb2002 at yahoo.it
Fri Jan 2 07:23:40 EST 2009


Thank you about the answer to my Question.
 
I will try this. but I believe, the compiler will include all the MPI's code, and I would like to disable this part with macros, because my programm works with lists and normally the list are made with pointers, and as far as I know, the MPI dont "like" pointers... So the Seriell version, when the MPI part is on, will not be optimized. 
 
With Regards
 
Matheus

--- Mar 30/12/08, Bruno Coutinho <coutinho at dcc.ufmg.br> ha scritto:

Da: Bruno Coutinho <coutinho at dcc.ufmg.br>
Oggetto: Re: [Beowulf] An Ask about Compilation
A: beowulf at beowulf.org
Data: Martedì 30 dicembre 2008, 22:12



2008/12/30 matheus reimann <mgrhferlamb2002 at yahoo.it>
>
> Hi,
>
> I am a newbie in the group, and I have an ask about Compilation of programs in seriel and paralell.
>
> I wanna have a programm which decides if the run is parallel or seriell. P.ex.: myexe.exe -> runs in seriell, and when I write: myexe.exe -parallel -> runs in parallel.
>
> I dont wanna compile ever when I need the program in seriel or in parallel. Usually is the seriell compilation with g++ and the parallel with mpiCC. Has anybody done a program like this before???

mpiCC is a wrap to g++ that adds flags to find MPI include and library files.
You can compile both with mpiCC.

To run the serial version, you can call  the binary directly and to run the parallel version run your program through mpirun to run inside the MPI enveronment.
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