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Add FFTW 3.3.8 source, and a Linux build
author Chris Cannam <cannam@all-day-breakfast.com>
date Tue, 19 Nov 2019 14:52:55 +0000
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1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
2 <html>
3 <!-- This manual is for FFTW
4 (version 3.3.8, 24 May 2018).
5
6 Copyright (C) 2003 Matteo Frigo.
7
8 Copyright (C) 2003 Massachusetts Institute of Technology.
9
10 Permission is granted to make and distribute verbatim copies of this
11 manual provided the copyright notice and this permission notice are
12 preserved on all copies.
13
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
17 permission notice identical to this one.
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20 into another language, under the above conditions for modified versions,
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22 approved by the Free Software Foundation. -->
23 <!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
24 <head>
25 <title>FFTW 3.3.8: Installation and Supported Hardware/Software</title>
26
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35 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
36 <link href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW" rel="up" title="Multi-threaded FFTW">
37 <link href="Usage-of-Multi_002dthreaded-FFTW.html#Usage-of-Multi_002dthreaded-FFTW" rel="next" title="Usage of Multi-threaded FFTW">
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71 <a name="Installation-and-Supported-Hardware_002fSoftware"></a>
72 <div class="header">
73 <p>
74 Next: <a href="Usage-of-Multi_002dthreaded-FFTW.html#Usage-of-Multi_002dthreaded-FFTW" accesskey="n" rel="next">Usage of Multi-threaded FFTW</a>, Previous: <a href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW" accesskey="p" rel="prev">Multi-threaded FFTW</a>, Up: <a href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW" accesskey="u" rel="up">Multi-threaded FFTW</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>
75 </div>
76 <hr>
77 <a name="Installation-and-Supported-Hardware_002fSoftware-1"></a>
78 <h3 class="section">5.1 Installation and Supported Hardware/Software</h3>
79
80 <p>All of the FFTW threads code is located in the <code>threads</code>
81 subdirectory of the FFTW package. On Unix systems, the FFTW threads
82 libraries and header files can be automatically configured, compiled,
83 and installed along with the uniprocessor FFTW libraries simply by
84 including <code>--enable-threads</code> in the flags to the <code>configure</code>
85 script (see <a href="Installation-on-Unix.html#Installation-on-Unix">Installation on Unix</a>), or <code>--enable-openmp</code> to use
86 <a href="http://www.openmp.org">OpenMP</a> threads.
87 <a name="index-configure"></a>
88 </p>
89
90 <a name="index-portability-3"></a>
91 <a name="index-OpenMP"></a>
92 <p>The threads routines require your operating system to have some sort
93 of shared-memory threads support. Specifically, the FFTW threads
94 package works with POSIX threads (available on most Unix variants,
95 from GNU/Linux to MacOS X) and Win32 threads. OpenMP threads, which
96 are supported in many common compilers (e.g. gcc) are also supported,
97 and may give better performance on some systems. (OpenMP threads are
98 also useful if you are employing OpenMP in your own code, in order to
99 minimize conflicts between threading models.) If you have a
100 shared-memory machine that uses a different threads API, it should be
101 a simple matter of programming to include support for it; see the file
102 <code>threads/threads.c</code> for more detail.
103 </p>
104 <p>You can compile FFTW with <em>both</em> <code>--enable-threads</code> and
105 <code>--enable-openmp</code> at the same time, since they install libraries
106 with different names (&lsquo;<samp>fftw3_threads</samp>&rsquo; and &lsquo;<samp>fftw3_omp</samp>&rsquo;, as
107 described below). However, your programs may only link to <em>one</em>
108 of these two libraries at a time.
109 </p>
110 <p>Ideally, of course, you should also have multiple processors in order to
111 get any benefit from the threaded transforms.
112 </p>
113
114
115
116 </body>
117 </html>