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Current fftw source
author Chris Cannam <cannam@all-day-breakfast.com>
date Tue, 18 Oct 2016 13:40:26 +0100
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3 <!-- This manual is for FFTW
4 (version 3.3.5, 30 July 2016).
5
6 Copyright (C) 2003 Matteo Frigo.
7
8 Copyright (C) 2003 Massachusetts Institute of Technology.
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10 Permission is granted to make and distribute verbatim copies of this
11 manual provided the copyright notice and this permission notice are
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14 Permission is granted to copy and distribute modified versions of this
15 manual under the conditions for verbatim copying, provided that the
16 entire resulting derived work is distributed under the terms of a
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25 <title>FFTW 3.3.5: Installation and Customization</title>
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72 <a name="Installation-and-Customization"></a>
73 <div class="header">
74 <p>
75 Next: <a href="Acknowledgments.html#Acknowledgments" accesskey="n" rel="next">Acknowledgments</a>, Previous: <a href="Upgrading-from-FFTW-version-2.html#Upgrading-from-FFTW-version-2" accesskey="p" rel="prev">Upgrading from FFTW version 2</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
76 </div>
77 <hr>
78 <a name="Installation-and-Customization-1"></a>
79 <h2 class="chapter">10 Installation and Customization</h2>
80 <a name="index-installation"></a>
81
82 <p>This chapter describes the installation and customization of FFTW, the
83 latest version of which may be downloaded from
84 <a href="http://www.fftw.org">the FFTW home page</a>.
85 </p>
86 <p>In principle, FFTW should work on any system with an ANSI C compiler
87 (<code>gcc</code> is fine). However, planner time is drastically reduced if
88 FFTW can exploit a hardware cycle counter; FFTW comes with cycle-counter
89 support for all modern general-purpose CPUs, but you may need to add a
90 couple of lines of code if your compiler is not yet supported
91 (see <a href="Cycle-Counters.html#Cycle-Counters">Cycle Counters</a>). (On Unix, there will be a warning at the end
92 of the <code>configure</code> output if no cycle counter is found.)
93 <a name="index-cycle-counter"></a>
94 <a name="index-compiler-1"></a>
95 <a name="index-portability-9"></a>
96 </p>
97
98 <p>Installation of FFTW is simplest if you have a Unix or a GNU system,
99 such as GNU/Linux, and we describe this case in the first section below,
100 including the use of special configuration options to e.g. install
101 different precisions or exploit optimizations for particular
102 architectures (e.g. SIMD). Compilation on non-Unix systems is a more
103 manual process, but we outline the procedure in the second section. It
104 is also likely that pre-compiled binaries will be available for popular
105 systems.
106 </p>
107 <p>Finally, we describe how you can customize FFTW for particular needs by
108 generating <em>codelets</em> for fast transforms of sizes not supported
109 efficiently by the standard FFTW distribution.
110 <a name="index-codelet-1"></a>
111 </p>
112 <table class="menu" border="0" cellspacing="0">
113 <tr><td align="left" valign="top">&bull; <a href="Installation-on-Unix.html#Installation-on-Unix" accesskey="1">Installation on Unix</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
114 </td></tr>
115 <tr><td align="left" valign="top">&bull; <a href="Installation-on-non_002dUnix-systems.html#Installation-on-non_002dUnix-systems" accesskey="2">Installation on non-Unix systems</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
116 </td></tr>
117 <tr><td align="left" valign="top">&bull; <a href="Cycle-Counters.html#Cycle-Counters" accesskey="3">Cycle Counters</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
118 </td></tr>
119 <tr><td align="left" valign="top">&bull; <a href="Generating-your-own-code.html#Generating-your-own-code" accesskey="4">Generating your own code</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
120 </td></tr>
121 </table>
122
123
124 <hr>
125 <div class="header">
126 <p>
127 Next: <a href="Acknowledgments.html#Acknowledgments" accesskey="n" rel="next">Acknowledgments</a>, Previous: <a href="Upgrading-from-FFTW-version-2.html#Upgrading-from-FFTW-version-2" accesskey="p" rel="prev">Upgrading from FFTW version 2</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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