[GRASS-user] grass + OpenMP

[Soeren Gebbert]

Hello Olavo,

2011/5/31 Olavo Borges D'Antonio <odantonio at aol.com>:
> Hello,
>
> I was looking for informations about grass and distributed computing and
> found a pdf on the subject. However I have a question:
>
> The Grass 6 has some modules that can be compiled with the OpenMP option,
> the other modules would have to be rebuild so they can run with this option?

Have a look at:
http://grass.osgeo.org/wiki/OpenMP

There are only a few modules using OpenMP (r.gwflow, r3.gwflow and
r.solute.transport). Parts of the gpde and gmath libraries in grass
6.5 and 7 are parallelized using OpenMP. These libraries provide tests
and benchmarks in the libraries test directories.

OpenMP is compiler dependent so specific compiler flags must be set.
Here a gcc grass compile example:
export CFLAGS="-ggdb -Wall -Werror-implicit-function-declaration
-fno-common -fopenmp"
export LDFLAGS="-lgomp"
./configure --with-cxx --without-freetype --with-sqlite --with-python
--with-postgresql

Best regards
Soeren

>
> thanks,
> Olavo D'Antonio
>
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