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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.
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10 Permission is granted to make and distribute verbatim copies of this
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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: Linking and Initializing MPI FFTW</title>
26
27 <meta name="description" content="FFTW 3.3.8: Linking and Initializing MPI FFTW">
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34 <link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
35 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
36 <link href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI" rel="up" title="Distributed-memory FFTW with MPI">
37 <link href="2d-MPI-example.html#g_t2d-MPI-example" rel="next" title="2d MPI example">
38 <link href="FFTW-MPI-Installation.html#FFTW-MPI-Installation" rel="prev" title="FFTW MPI Installation">
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70 <body lang="en">
71 <a name="Linking-and-Initializing-MPI-FFTW"></a>
72 <div class="header">
73 <p>
74 Next: <a href="2d-MPI-example.html#g_t2d-MPI-example" accesskey="n" rel="next">2d MPI example</a>, Previous: <a href="FFTW-MPI-Installation.html#FFTW-MPI-Installation" accesskey="p" rel="prev">FFTW MPI Installation</a>, Up: <a href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI" accesskey="u" rel="up">Distributed-memory FFTW with MPI</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="Linking-and-Initializing-MPI-FFTW-1"></a>
78 <h3 class="section">6.2 Linking and Initializing MPI FFTW</h3>
79
80 <p>Programs using the MPI FFTW routines should be linked with
81 <code>-lfftw3_mpi -lfftw3 -lm</code> on Unix in double precision,
82 <code>-lfftw3f_mpi -lfftw3f -lm</code> in single precision, and so on
83 (see <a href="Precision.html#Precision">Precision</a>). You will also need to link with whatever library
84 is responsible for MPI on your system; in most MPI implementations,
85 there is a special compiler alias named <code>mpicc</code> to compile and
86 link MPI code.
87 <a name="index-mpicc-1"></a>
88 <a name="index-linking-on-Unix-1"></a>
89 <a name="index-precision-5"></a>
90 </p>
91
92 <a name="index-fftw_005finit_005fthreads-1"></a>
93 <p>Before calling any FFTW routines except possibly
94 <code>fftw_init_threads</code> (see <a href="Combining-MPI-and-Threads.html#Combining-MPI-and-Threads">Combining MPI and Threads</a>), but after calling
95 <code>MPI_Init</code>, you should call the function:
96 </p>
97 <div class="example">
98 <pre class="example">void fftw_mpi_init(void);
99 </pre></div>
100 <a name="index-fftw_005fmpi_005finit"></a>
101
102 <p>If, at the end of your program, you want to get rid of all memory and
103 other resources allocated internally by FFTW, for both the serial and
104 MPI routines, you can call:
105 </p>
106 <div class="example">
107 <pre class="example">void fftw_mpi_cleanup(void);
108 </pre></div>
109 <a name="index-fftw_005fmpi_005fcleanup"></a>
110
111 <p>which is much like the <code>fftw_cleanup()</code> function except that it
112 also gets rid of FFTW&rsquo;s MPI-related data. You must <em>not</em> execute
113 any previously created plans after calling this function.
114 </p>
115
116
117
118 </body>
119 </html>