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FFTW includes two standalone utility programs that deal with wisdom. We
cannam@95: merely summarize them here, since they come with their own man
cannam@95: pages for Unix and GNU systems (with HTML versions on our web site).
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The first program is fftw-wisdom (or fftwf-wisdom in
cannam@95: single precision, etcetera), which can be used to create a wisdom file
cannam@95: containing plans for any of the transform sizes and types supported by
cannam@95: FFTW. It is preferable to create wisdom directly from your executable
cannam@95: (see Caveats in Using Wisdom), but this program is useful for
cannam@95: creating global wisdom files for fftw_import_system_wisdom.
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The second program is fftw-wisdom-to-conf, which takes a wisdom
cannam@95: file as input and produces a configuration routine as output. The
cannam@95: latter is a C subroutine that you can compile and link into your
cannam@95: program, replacing a routine of the same name in the FFTW library, that
cannam@95: determines which parts of FFTW are callable by your program.
cannam@95: fftw-wisdom-to-conf produces a configuration routine that links
cannam@95: to only those parts of FFTW needed by the saved plans in the wisdom,
cannam@95: greatly reducing the size of statically linked executables (which should
cannam@95: only attempt to create plans corresponding to those in the wisdom,
cannam@95: however).
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