100 lines
4.3 KiB
HTML
100 lines
4.3 KiB
HTML
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<!-- This manual is for FFTW
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(version 3.3.10, 10 December 2020).
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Copyright (C) 2003 Matteo Frigo.
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Copyright (C) 2003 Massachusetts Institute of Technology.
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Permission is granted to make and distribute verbatim copies of this
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<title>Wisdom Utilities (FFTW 3.3.10)</title>
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<link href="Concept-Index.html" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Wisdom.html" rel="up" title="Wisdom">
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<span id="Wisdom-Utilities"></span><div class="header">
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<p>
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Previous: <a href="Forgetting-Wisdom.html" accesskey="p" rel="prev">Forgetting Wisdom</a>, Up: <a href="Wisdom.html" accesskey="u" rel="up">Wisdom</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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<hr>
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<span id="Wisdom-Utilities-1"></span><h4 class="subsection">4.7.4 Wisdom Utilities</h4>
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<p>FFTW includes two standalone utility programs that deal with wisdom. We
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merely summarize them here, since they come with their own <code>man</code>
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pages for Unix and GNU systems (with HTML versions on our web site).
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</p>
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<p>The first program is <code>fftw-wisdom</code> (or <code>fftwf-wisdom</code> in
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single precision, etcetera), which can be used to create a wisdom file
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containing plans for any of the transform sizes and types supported by
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FFTW. It is preferable to create wisdom directly from your executable
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(see <a href="Caveats-in-Using-Wisdom.html">Caveats in Using Wisdom</a>), but this program is useful for
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creating global wisdom files for <code>fftw_import_system_wisdom</code>.
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<span id="index-fftw_002dwisdom-utility-1"></span>
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</p>
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<p>The second program is <code>fftw-wisdom-to-conf</code>, which takes a wisdom
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file as input and produces a <em>configuration routine</em> as output. The
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latter is a C subroutine that you can compile and link into your
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program, replacing a routine of the same name in the FFTW library, that
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determines which parts of FFTW are callable by your program.
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<code>fftw-wisdom-to-conf</code> produces a configuration routine that links
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to only those parts of FFTW needed by the saved plans in the wisdom,
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greatly reducing the size of statically linked executables (which should
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only attempt to create plans corresponding to those in the wisdom,
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however).
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<span id="index-fftw_002dwisdom_002dto_002dconf-utility"></span>
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<span id="index-configuration-routines"></span>
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</p>
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</body>
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