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2 <head>
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3 <title>Installation and Supported Hardware/Software - FFTW 3.3.3</title>
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5 <meta name="description" content="FFTW 3.3.3">
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8 <link rel="up" href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW" title="Multi-threaded FFTW">
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9 <link rel="prev" href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW" title="Multi-threaded FFTW">
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10 <link rel="next" href="Usage-of-Multi_002dthreaded-FFTW.html#Usage-of-Multi_002dthreaded-FFTW" title="Usage of Multi-threaded FFTW">
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11 <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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12 <!--
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13 This manual is for FFTW
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14 (version 3.3.3, 25 November 2012).
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15
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16 Copyright (C) 2003 Matteo Frigo.
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17
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18 Copyright (C) 2003 Massachusetts Institute of Technology.
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19
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20 Permission is granted to make and distribute verbatim copies of
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21 this manual provided the copyright notice and this permission
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22 notice are preserved on all copies.
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23
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24 Permission is granted to copy and distribute modified versions of
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25 this manual under the conditions for verbatim copying, provided
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26 that the entire resulting derived work is distributed under the
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27 terms of a permission notice identical to this one.
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28
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29 Permission is granted to copy and distribute translations of this
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30 manual into another language, under the above conditions for
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31 modified versions, except that this permission notice may be
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32 stated in a translation approved by the Free Software Foundation.
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33 -->
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45 --></style>
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46 </head>
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47 <body>
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48 <div class="node">
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49 <a name="Installation-and-Supported-Hardware%2fSoftware"></a>
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50 <a name="Installation-and-Supported-Hardware_002fSoftware"></a>
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51 <p>
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52 Next: <a rel="next" accesskey="n" href="Usage-of-Multi_002dthreaded-FFTW.html#Usage-of-Multi_002dthreaded-FFTW">Usage of Multi-threaded FFTW</a>,
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53 Previous: <a rel="previous" accesskey="p" href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW">Multi-threaded FFTW</a>,
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54 Up: <a rel="up" accesskey="u" href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW">Multi-threaded FFTW</a>
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55 <hr>
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56 </div>
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57
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58 <h3 class="section">5.1 Installation and Supported Hardware/Software</h3>
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59
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60 <p>All of the FFTW threads code is located in the <code>threads</code>
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61 subdirectory of the FFTW package. On Unix systems, the FFTW threads
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62 libraries and header files can be automatically configured, compiled,
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63 and installed along with the uniprocessor FFTW libraries simply by
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64 including <code>--enable-threads</code> in the flags to the <code>configure</code>
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65 script (see <a href="Installation-on-Unix.html#Installation-on-Unix">Installation on Unix</a>), or <code>--enable-openmp</code> to use
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66 <a href="http://www.openmp.org">OpenMP</a> threads.
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67 <a name="index-configure-329"></a>
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68
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69 <p><a name="index-portability-330"></a><a name="index-OpenMP-331"></a>The threads routines require your operating system to have some sort
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70 of shared-memory threads support. Specifically, the FFTW threads
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71 package works with POSIX threads (available on most Unix variants,
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72 from GNU/Linux to MacOS X) and Win32 threads. OpenMP threads, which
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73 are supported in many common compilers (e.g. gcc) are also supported,
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74 and may give better performance on some systems. (OpenMP threads are
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75 also useful if you are employing OpenMP in your own code, in order to
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76 minimize conflicts between threading models.) If you have a
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77 shared-memory machine that uses a different threads API, it should be
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78 a simple matter of programming to include support for it; see the file
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79 <code>threads/threads.c</code> for more detail.
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80
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81 <p>You can compile FFTW with <em>both</em> <code>--enable-threads</code> and
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82 <code>--enable-openmp</code> at the same time, since they install libraries
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83 with different names (‘<samp><span class="samp">fftw3_threads</span></samp>’ and ‘<samp><span class="samp">fftw3_omp</span></samp>’, as
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84 described below). However, your programs may only link to <em>one</em>
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85 of these two libraries at a time.
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86
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87 <p>Ideally, of course, you should also have multiple processors in order to
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88 get any benefit from the threaded transforms.
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89
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90 <!-- -->
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91 </body></html>
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92
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