Re: centos 5.5 oscar: gcc41, gcc44 and gfortran41, gfortran44

["Marcelo M. Garcia" <marcelo.maia.garcia@xxxxxxxxxxxxxx>]

> 
> ok. but if script are using direct gcc...and not the varaible CC ?
> 
>> I think this make more sense if you have different MPI compilers, like, 
>> one mpicc (gcc34), other mpicc(gcc41), etc. Or different BLAS libraries, 
>> like libblas or libgoto etc.
>>
> 
> it is my problem...with mpicc for example. And I though I could solve it
> with a gcc44 module or a gcc41 module. For example I have gcc 4.4
> installed, how can say to mpicc to use it ?
> 

Hi

I suggest you to edit script, and replace gcc with CC[1]. Or put an 
alias at the beginning of the script: alias gcc=gcc34(?).

For mpi, it's much easier because you set everything: CC=gcc34, 
PREFIX=/data/mpi/gcc34, etc. Then you build the other one, CC=gcc, 
PREFIX=/data/mpi/gcc41, etc. Now you build you modules.

Probably in the FAQ or documentation of your MPI explains how to create 
your libraries, etc.

There a few good tutorials about parallel computing and MPI, etc here:
https://computing.llnl.gov/tutorials/parallel_comp/
https://computing.llnl.gov/tutorials/mpi/

Regards

mg.

[1]
You can replace inside vi, for example, or use something like 'sed':
http://www.grymoire.com/Unix/Sed.html#uh-0
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