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2 <head>
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3 <title>Wisdom Utilities - FFTW 3.3.4</title>
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4 <meta http-equiv="Content-Type" content="text/html">
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5 <meta name="description" content="FFTW 3.3.4">
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7 <link title="Top" rel="start" href="index.html#Top">
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8 <link rel="up" href="Wisdom.html#Wisdom" title="Wisdom">
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9 <link rel="prev" href="Forgetting-Wisdom.html#Forgetting-Wisdom" title="Forgetting Wisdom">
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11 <!--
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12 This manual is for FFTW
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13 (version 3.3.4, 20 September 2013).
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14
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15 Copyright (C) 2003 Matteo Frigo.
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16
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17 Copyright (C) 2003 Massachusetts Institute of Technology.
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18
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19 Permission is granted to make and distribute verbatim copies of
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20 this manual provided the copyright notice and this permission
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21 notice are preserved on all copies.
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22
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23 Permission is granted to copy and distribute modified versions of
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24 this manual under the conditions for verbatim copying, provided
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25 that the entire resulting derived work is distributed under the
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26 terms of a permission notice identical to this one.
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27
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28 Permission is granted to copy and distribute translations of this
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29 manual into another language, under the above conditions for
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30 modified versions, except that this permission notice may be
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31 stated in a translation approved by the Free Software Foundation.
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32 -->
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44 --></style>
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45 </head>
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46 <body>
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47 <div class="node">
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48 <a name="Wisdom-Utilities"></a>
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49 <p>
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50 Previous: <a rel="previous" accesskey="p" href="Forgetting-Wisdom.html#Forgetting-Wisdom">Forgetting Wisdom</a>,
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51 Up: <a rel="up" accesskey="u" href="Wisdom.html#Wisdom">Wisdom</a>
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52 <hr>
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53 </div>
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54
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55 <h4 class="subsection">4.7.4 Wisdom Utilities</h4>
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56
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57 <p>FFTW includes two standalone utility programs that deal with wisdom. We
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58 merely summarize them here, since they come with their own <code>man</code>
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59 pages for Unix and GNU systems (with HTML versions on our web site).
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60
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61 <p>The first program is <code>fftw-wisdom</code> (or <code>fftwf-wisdom</code> in
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62 single precision, etcetera), which can be used to create a wisdom file
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63 containing plans for any of the transform sizes and types supported by
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64 FFTW. It is preferable to create wisdom directly from your executable
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65 (see <a href="Caveats-in-Using-Wisdom.html#Caveats-in-Using-Wisdom">Caveats in Using Wisdom</a>), but this program is useful for
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66 creating global wisdom files for <code>fftw_import_system_wisdom</code>.
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67 <a name="index-fftw_002dwisdom-utility-292"></a>
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68
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69 <p>The second program is <code>fftw-wisdom-to-conf</code>, which takes a wisdom
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70 file as input and produces a <dfn>configuration routine</dfn> as output. The
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71 latter is a C subroutine that you can compile and link into your
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72 program, replacing a routine of the same name in the FFTW library, that
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73 determines which parts of FFTW are callable by your program.
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74 <code>fftw-wisdom-to-conf</code> produces a configuration routine that links
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75 to only those parts of FFTW needed by the saved plans in the wisdom,
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76 greatly reducing the size of statically linked executables (which should
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77 only attempt to create plans corresponding to those in the wisdom,
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78 however).
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79 <a name="index-fftw_002dwisdom_002dto_002dconf-utility-293"></a><a name="index-configuration-routines-294"></a>
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80 <!-- -->
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81
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82 </body></html>
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83
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