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106 lines
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106 lines
5 KiB
HTML
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<!-- This manual is for FFTW
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(version 3.3.10, 10 December 2020).
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Copyright (C) 2003 Matteo Frigo.
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Copyright (C) 2003 Massachusetts Institute of Technology.
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Permission is granted to make and distribute verbatim copies of this
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manual provided the copyright notice and this permission notice are
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preserved on all copies.
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Permission is granted to copy and distribute modified versions of this
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manual under the conditions for verbatim copying, provided that the
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entire resulting derived work is distributed under the terms of a
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permission notice identical to this one.
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Permission is granted to copy and distribute translations of this manual
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into another language, under the above conditions for modified versions,
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except that this permission notice may be stated in a translation
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approved by the Free Software Foundation. -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>Installation and Supported Hardware/Software (FFTW 3.3.10)</title>
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<meta name="description" content="Installation and Supported Hardware/Software (FFTW 3.3.10)">
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<link href="index.html" rel="start" title="Top">
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<link href="Concept-Index.html" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Multi_002dthreaded-FFTW.html" rel="up" title="Multi-threaded FFTW">
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<link href="Usage-of-Multi_002dthreaded-FFTW.html" rel="next" title="Usage of Multi-threaded FFTW">
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</head>
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<body lang="en">
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<span id="Installation-and-Supported-Hardware_002fSoftware"></span><div class="header">
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<p>
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Next: <a href="Usage-of-Multi_002dthreaded-FFTW.html" accesskey="n" rel="next">Usage of Multi-threaded FFTW</a>, Previous: <a href="Multi_002dthreaded-FFTW.html" accesskey="p" rel="prev">Multi-threaded FFTW</a>, Up: <a href="Multi_002dthreaded-FFTW.html" accesskey="u" rel="up">Multi-threaded FFTW</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<span id="Installation-and-Supported-Hardware_002fSoftware-1"></span><h3 class="section">5.1 Installation and Supported Hardware/Software</h3>
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<p>All of the FFTW threads code is located in the <code>threads</code>
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subdirectory of the FFTW package. On Unix systems, the FFTW threads
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libraries and header files can be automatically configured, compiled,
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and installed along with the uniprocessor FFTW libraries simply by
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including <code>--enable-threads</code> in the flags to the <code>configure</code>
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script (see <a href="Installation-on-Unix.html">Installation on Unix</a>), or <code>--enable-openmp</code> to use
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<a href="http://www.openmp.org">OpenMP</a> threads.
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<span id="index-configure"></span>
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</p>
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<span id="index-portability-3"></span>
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<span id="index-OpenMP"></span>
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<p>The threads routines require your operating system to have some sort
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of shared-memory threads support. Specifically, the FFTW threads
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package works with POSIX threads (available on most Unix variants,
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from GNU/Linux to MacOS X) and Win32 threads. OpenMP threads, which
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are supported in many common compilers (e.g. gcc) are also supported,
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and may give better performance on some systems. (OpenMP threads are
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also useful if you are employing OpenMP in your own code, in order to
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minimize conflicts between threading models.) If you have a
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shared-memory machine that uses a different threads API, it should be
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a simple matter of programming to include support for it; see the file
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<code>threads/threads.c</code> for more detail.
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</p>
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<p>You can compile FFTW with <em>both</em> <code>--enable-threads</code> and
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<code>--enable-openmp</code> at the same time, since they install libraries
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with different names (‘<samp>fftw3_threads</samp>’ and ‘<samp>fftw3_omp</samp>’, as
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described below). However, your programs may only link to <em>one</em>
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of these two libraries at a time.
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</p>
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<p>Ideally, of course, you should also have multiple processors in order to
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get any benefit from the threaded transforms.
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</p>
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</body>
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</html>
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