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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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cannam@167 1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
cannam@167 2 <html>
cannam@167 3 <!-- This manual is for FFTW
cannam@167 4 (version 3.3.8, 24 May 2018).
cannam@167 5
cannam@167 6 Copyright (C) 2003 Matteo Frigo.
cannam@167 7
cannam@167 8 Copyright (C) 2003 Massachusetts Institute of Technology.
cannam@167 9
cannam@167 10 Permission is granted to make and distribute verbatim copies of this
cannam@167 11 manual provided the copyright notice and this permission notice are
cannam@167 12 preserved on all copies.
cannam@167 13
cannam@167 14 Permission is granted to copy and distribute modified versions of this
cannam@167 15 manual under the conditions for verbatim copying, provided that the
cannam@167 16 entire resulting derived work is distributed under the terms of a
cannam@167 17 permission notice identical to this one.
cannam@167 18
cannam@167 19 Permission is granted to copy and distribute translations of this manual
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cannam@167 22 approved by the Free Software Foundation. -->
cannam@167 23 <!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
cannam@167 24 <head>
cannam@167 25 <title>FFTW 3.3.8: Installation and Supported Hardware/Software</title>
cannam@167 26
cannam@167 27 <meta name="description" content="FFTW 3.3.8: Installation and Supported Hardware/Software">
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cannam@167 35 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
cannam@167 36 <link href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW" rel="up" title="Multi-threaded FFTW">
cannam@167 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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cannam@167 68 </head>
cannam@167 69
cannam@167 70 <body lang="en">
cannam@167 71 <a name="Installation-and-Supported-Hardware_002fSoftware"></a>
cannam@167 72 <div class="header">
cannam@167 73 <p>
cannam@167 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>
cannam@167 75 </div>
cannam@167 76 <hr>
cannam@167 77 <a name="Installation-and-Supported-Hardware_002fSoftware-1"></a>
cannam@167 78 <h3 class="section">5.1 Installation and Supported Hardware/Software</h3>
cannam@167 79
cannam@167 80 <p>All of the FFTW threads code is located in the <code>threads</code>
cannam@167 81 subdirectory of the FFTW package. On Unix systems, the FFTW threads
cannam@167 82 libraries and header files can be automatically configured, compiled,
cannam@167 83 and installed along with the uniprocessor FFTW libraries simply by
cannam@167 84 including <code>--enable-threads</code> in the flags to the <code>configure</code>
cannam@167 85 script (see <a href="Installation-on-Unix.html#Installation-on-Unix">Installation on Unix</a>), or <code>--enable-openmp</code> to use
cannam@167 86 <a href="http://www.openmp.org">OpenMP</a> threads.
cannam@167 87 <a name="index-configure"></a>
cannam@167 88 </p>
cannam@167 89
cannam@167 90 <a name="index-portability-3"></a>
cannam@167 91 <a name="index-OpenMP"></a>
cannam@167 92 <p>The threads routines require your operating system to have some sort
cannam@167 93 of shared-memory threads support. Specifically, the FFTW threads
cannam@167 94 package works with POSIX threads (available on most Unix variants,
cannam@167 95 from GNU/Linux to MacOS X) and Win32 threads. OpenMP threads, which
cannam@167 96 are supported in many common compilers (e.g. gcc) are also supported,
cannam@167 97 and may give better performance on some systems. (OpenMP threads are
cannam@167 98 also useful if you are employing OpenMP in your own code, in order to
cannam@167 99 minimize conflicts between threading models.) If you have a
cannam@167 100 shared-memory machine that uses a different threads API, it should be
cannam@167 101 a simple matter of programming to include support for it; see the file
cannam@167 102 <code>threads/threads.c</code> for more detail.
cannam@167 103 </p>
cannam@167 104 <p>You can compile FFTW with <em>both</em> <code>--enable-threads</code> and
cannam@167 105 <code>--enable-openmp</code> at the same time, since they install libraries
cannam@167 106 with different names (&lsquo;<samp>fftw3_threads</samp>&rsquo; and &lsquo;<samp>fftw3_omp</samp>&rsquo;, as
cannam@167 107 described below). However, your programs may only link to <em>one</em>
cannam@167 108 of these two libraries at a time.
cannam@167 109 </p>
cannam@167 110 <p>Ideally, of course, you should also have multiple processors in order to
cannam@167 111 get any benefit from the threaded transforms.
cannam@167 112 </p>
cannam@167 113
cannam@167 114
cannam@167 115
cannam@167 116 </body>
cannam@167 117 </html>