[mplongjr]

Hi all... I've been using OpenFOAM 1.3 for several months now and I've been very impressed with it's capabilities. In the 1.4 release notes, there is mention of a parallel build process with wmake, but I can't find any mention of how to initiate it.

I naively tried ./Allwmake -j 2 .. but it didn't seem to use more than one process..

Is there something I'm missing?

[mbeaudoin]

Mike,

There is a new environment variable called $WM_NCOMPPROCS.

Check out the file $WM_DIR/wmake for the details.

The funny thing is: that variable is not initialized under OpenFOAM 1.4.

Just add the following line to your $WM_PROJECT_DIR/$FOAM_DOT_DIR/bashrc

export WM_NCOMPPROCS=2

Adjust the number to the number of processors you want to use for compiling.

(For csh, adjust your file $WM_PROJECT_DIR/$FOAM_DOT_DIR/cshrc

setenv WM_NCOMPPROCS 2
)

Enjoy,

Martin

[mplongjr]

Thanks Martin... that worked perfectly. I've been trying out some different optimizations with the pre-release GCC 4.2 and it really helps cutting the compile time down.

Mike

[mattijs]

You can also distribute parallel builds. Works great on clusters. See the Wiki page about wmake.