[CentOS] centos 5.5 oscar: gcc41, gcc44 and gfortran41, gfortran44

giggzounet giggzounet at gmail.com
Fri Sep 3 05:18:41 EDT 2010

Le 03/09/2010 10:58, Marcelo M. Garcia a écrit :
> giggzounet wrote:
>> So I must have a directory (for example /opt/compiler/gcc) with the
>> different versions of gcc (4.1 and 4.4 in my case). Then the module tcl
>> script chooses one and exclude the other, does it ?
>> in order to have these gcc directories can I just copy the files from
>> the installed rpm ? or must I compile the different gcc versions by myself ?
> Hi
> To be honest, I'm a little bit confused. If you install from the rpms 
> the binaries will have different names : gcc, gcc34, etc. So why the 
> hassle to differentiate them?
> Unless, instead, you only set environment variables CC=gcc or CC=gcc34. 
> But sounds silly.

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 ?

Thx for your patience :)
Best regards

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