(New page: == Remarks == As usual we would like to install the libraries in the user space, so we will create a couple of directories for that purpose: mkdir $HOME/usr mkdir $HOME/soft To inst...) |
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Revision as of 14:12, 29 January 2009
Remarks
As usual we would like to install the libraries in the user space, so we will create a couple of directories for that purpose:
mkdir $HOME/usr mkdir $HOME/soft
To install FFTW3, download the package from the FFTW3 download page and decompress it:
cd ~/soft wget http://www.fftw.org/fftw-3.3alpha1.tar.gz tar -zxvf fftw-3.3alpha1.tar.gz cd fftw-3.3alpha1
Ubuntu only: If you want to install FFTW3 in your local Ubuntu you can skip this tutorial altogether and just run:
sudo apt-get install libfftw3-dev libfftw3-doc
However the MPI version (e.g. for testing) will not be installed in this way.
Build and Install (serial version only)
Then configure, make and install:
./configure --prefix=$HOME/usr make make install
The following files will be installed in:
~/usr/include/fftw3.h ~/usr/include/fftw3.f ~/usr/lib/libfftw3.a ~/usr/lib/libfftw3.la
The typical compilation options will be
export LD_RUN_PATH=$HOME/usr/lib #do this once *before* compiling cc -I$HOME/usr/include program.c -L$HOME/usr/lib -lfftw3 -o program
The official tutorial on the usage of FFTW3 (which is different from FFTW 2) is located here.
MPI version
To install the experimental MPI version of FFTW3, make sure you downloaded fftw-3.3alpha1 (and not fftw-3.2 for example). Also make sure that there is an MPI compiler available:
$which mpicc /usr/bin/mpicc
If it is not available, you can choose one with the command 'mpi-selector-menu' in wcr. I tested this with the 'openmpi_gcc-1.2.2' compiler.
Do the same procedure of downloading the file and decompressing it, but add the --enable-mpi flag:
./configure --prefix=$HOME/usr --enable-mpi make install
now the library will be installed in your home directory, besides the files mentioned above, you will find also:
~/usr/include/fftw3-mpi.h ~/usr/lib/libfftw3_mpi.a ~/usr/lib/libfftw3_mpi.la
The typical command line for compilation will be
export LD_RUN_PATH=$HOME/usr/lib #do this *before* compiling mpicc -I$HOME/usr mpi_program.c -L$HOME/usr/lib -lfftw3_mpi -lfftw3 -o mpi_program
Make sure to link *first* to fftw3_mpi and *later* to fftw3.
The official tutorial for the MPI version of FFTW3 can be found here.