fftw3.3.8
Introduction to fftw
FFTW is a C subroutine library for computing the discrete Fourier
transform (DFT) in one or more dimensions, of arbitrary input size,
and of both real and complex data (as well as of even/odd data,
i.e. the discrete cosine/sine transforms or DCT/DST).
This package is known to build and work properly using an LFS8.3
platform.
Package Information
User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/fftw
Installation of fftw
Install fftw by running the
following commands:
./configure prefix=/usr enableshared enablethreads &&
make
To test the results, issue: make
check. On 32bit systems, the tests can take
substantially longer than they would on 64bit machines.
Now, as the root
user:
make install
Command Explanations
enableshared
disablestatic: Use shared libs instead of static
libs.
enablethreads:
This enables libfftw3_threads.so
to
be compiled. It is used by e.g. the gimp plugin from G'MIC.
enablefloat
: This enables floating
point, and will cause the library to be called libfftw3f.so
(needed by RawTherapee (and similarly for
the threaded library if that is built (not needed by RawTherapee).
These versions are not usable by packages in this book which use
libfftw3
so if you need both you will
need to build fftw twice.
Contents
Installed Programs:
fftwwisdom and
fftwwisdomtoconf
Installed Library:
libfftw3.so and libfftw3_threads.so, or
libfftw3f.so and libfftw3f_threads.so
Installed Directories:
None
Short Descriptions
fftwwisdom

is a utility to generate FFTW wisdom files, which contain
saved information about how to optimally compute
(Fourier) transforms of various sizes.

fftwwisdomtoconf

is a utility to generate C configuration routines from
FFTW wisdom files, where the latter contain saved
information about how to optimally compute (Fourier)
transforms of various sizes.

libfftw3.so

is the Fast Fourier Transform library

libfftw3_threads.so

is the threaded Fast Fourier Transform library

libfftw3f.so

is the floatingpoint Fast Fourier Transform library

libfftw3f_threads.so

is the threaded floatingpoint Fast Fourier Transform
library

Last updated on 20190117 15:52:08 0600