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1 <html lang="en">
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2 <head>
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3 <title>Installation and Customization - FFTW 3.3.3</title>
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4 <meta http-equiv="Content-Type" content="text/html">
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5 <meta name="description" content="FFTW 3.3.3">
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6 <meta name="generator" content="makeinfo 4.13">
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7 <link title="Top" rel="start" href="index.html#Top">
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8 <link rel="prev" href="Upgrading-from-FFTW-version-2.html#Upgrading-from-FFTW-version-2" title="Upgrading from FFTW version 2">
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9 <link rel="next" href="Acknowledgments.html#Acknowledgments" title="Acknowledgments">
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10 <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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11 <!--
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12 This manual is for FFTW
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13 (version 3.3.3, 25 November 2012).
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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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34 <style type="text/css"><!--
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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="Installation-and-Customization"></a>
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49 <p>
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50 Next: <a rel="next" accesskey="n" href="Acknowledgments.html#Acknowledgments">Acknowledgments</a>,
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51 Previous: <a rel="previous" accesskey="p" href="Upgrading-from-FFTW-version-2.html#Upgrading-from-FFTW-version-2">Upgrading from FFTW version 2</a>,
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52 Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
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53 <hr>
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54 </div>
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55
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56 <h2 class="chapter">10 Installation and Customization</h2>
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57
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58 <p><a name="index-installation-603"></a>
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59 This chapter describes the installation and customization of FFTW, the
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60 latest version of which may be downloaded from
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61 <a href="http://www.fftw.org">the FFTW home page</a>.
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62
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63 <p>In principle, FFTW should work on any system with an ANSI C compiler
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64 (<code>gcc</code> is fine). However, planner time is drastically reduced if
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65 FFTW can exploit a hardware cycle counter; FFTW comes with cycle-counter
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66 support for all modern general-purpose CPUs, but you may need to add a
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67 couple of lines of code if your compiler is not yet supported
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68 (see <a href="Cycle-Counters.html#Cycle-Counters">Cycle Counters</a>). (On Unix, there will be a warning at the end
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69 of the <code>configure</code> output if no cycle counter is found.)
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70 <a name="index-cycle-counter-604"></a><a name="index-compiler-605"></a><a name="index-portability-606"></a>
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71
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72 <p>Installation of FFTW is simplest if you have a Unix or a GNU system,
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73 such as GNU/Linux, and we describe this case in the first section below,
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74 including the use of special configuration options to e.g. install
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75 different precisions or exploit optimizations for particular
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76 architectures (e.g. SIMD). Compilation on non-Unix systems is a more
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77 manual process, but we outline the procedure in the second section. It
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78 is also likely that pre-compiled binaries will be available for popular
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79 systems.
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80
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81 <p>Finally, we describe how you can customize FFTW for particular needs by
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82 generating <em>codelets</em> for fast transforms of sizes not supported
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83 efficiently by the standard FFTW distribution.
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84 <a name="index-codelet-607"></a>
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85
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86 <ul class="menu">
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87 <li><a accesskey="1" href="Installation-on-Unix.html#Installation-on-Unix">Installation on Unix</a>
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88 <li><a accesskey="2" href="Installation-on-non_002dUnix-systems.html#Installation-on-non_002dUnix-systems">Installation on non-Unix systems</a>
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89 <li><a accesskey="3" href="Cycle-Counters.html#Cycle-Counters">Cycle Counters</a>
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90 <li><a accesskey="4" href="Generating-your-own-code.html#Generating-your-own-code">Generating your own code</a>
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91 </ul>
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92
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93 <!-- -->
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94 </body></html>
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95
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