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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">
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3 <!-- This manual is for FFTW
4 (version 3.3.8, 24 May 2018).
5
6 Copyright (C) 2003 Matteo Frigo.
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8 Copyright (C) 2003 Massachusetts Institute of Technology.
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25 <title>FFTW 3.3.8: Calling FFTW from Legacy Fortran</title>
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37 <link href="Fortran_002dinterface-routines.html#Fortran_002dinterface-routines" rel="next" title="Fortran-interface routines">
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71 <a name="Calling-FFTW-from-Legacy-Fortran"></a>
72 <div class="header">
73 <p>
74 Next: <a href="Upgrading-from-FFTW-version-2.html#Upgrading-from-FFTW-version-2" accesskey="n" rel="next">Upgrading from FFTW version 2</a>, Previous: <a href="Calling-FFTW-from-Modern-Fortran.html#Calling-FFTW-from-Modern-Fortran" accesskey="p" rel="prev">Calling FFTW from Modern Fortran</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</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="Calling-FFTW-from-Legacy-Fortran-1"></a>
78 <h2 class="chapter">8 Calling FFTW from Legacy Fortran</h2>
79 <a name="index-Fortran-interface-3"></a>
80
81 <p>This chapter describes the interface to FFTW callable by Fortran code
82 in older compilers not supporting the Fortran 2003 C interoperability
83 features (see <a href="Calling-FFTW-from-Modern-Fortran.html#Calling-FFTW-from-Modern-Fortran">Calling FFTW from Modern Fortran</a>). This interface
84 has the major disadvantage that it is not type-checked, so if you
85 mistake the argument types or ordering then your program will not have
86 any compiler errors, and will likely crash at runtime. So, greater
87 care is needed. Also, technically interfacing older Fortran versions
88 to C is nonstandard, but in practice we have found that the techniques
89 used in this chapter have worked with all known Fortran compilers for
90 many years.
91 </p>
92 <p>The legacy Fortran interface differs from the C interface only in the
93 prefix (&lsquo;<samp>dfftw_</samp>&rsquo; instead of &lsquo;<samp>fftw_</samp>&rsquo; in double precision) and
94 a few other minor details. This Fortran interface is included in the
95 FFTW libraries by default, unless a Fortran compiler isn&rsquo;t found on
96 your system or <code>--disable-fortran</code> is included in the
97 <code>configure</code> flags. We assume here that the reader is already
98 familiar with the usage of FFTW in C, as described elsewhere in this
99 manual.
100 </p>
101 <p>The MPI parallel interface to FFTW is <em>not</em> currently available
102 to legacy Fortran.
103 </p>
104 <table class="menu" border="0" cellspacing="0">
105 <tr><td align="left" valign="top">&bull; <a href="Fortran_002dinterface-routines.html#Fortran_002dinterface-routines" accesskey="1">Fortran-interface routines</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
106 </td></tr>
107 <tr><td align="left" valign="top">&bull; <a href="FFTW-Constants-in-Fortran.html#FFTW-Constants-in-Fortran" accesskey="2">FFTW Constants in Fortran</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
108 </td></tr>
109 <tr><td align="left" valign="top">&bull; <a href="FFTW-Execution-in-Fortran.html#FFTW-Execution-in-Fortran" accesskey="3">FFTW Execution in Fortran</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
110 </td></tr>
111 <tr><td align="left" valign="top">&bull; <a href="Fortran-Examples.html#Fortran-Examples" accesskey="4">Fortran Examples</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
112 </td></tr>
113 <tr><td align="left" valign="top">&bull; <a href="Wisdom-of-Fortran_003f.html#Wisdom-of-Fortran_003f" accesskey="5">Wisdom of Fortran?</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
114 </td></tr>
115 </table>
116
117 <hr>
118 <div class="header">
119 <p>
120 Next: <a href="Upgrading-from-FFTW-version-2.html#Upgrading-from-FFTW-version-2" accesskey="n" rel="next">Upgrading from FFTW version 2</a>, Previous: <a href="Calling-FFTW-from-Modern-Fortran.html#Calling-FFTW-from-Modern-Fortran" accesskey="p" rel="prev">Calling FFTW from Modern Fortran</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</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>
121 </div>
122
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124
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126 </html>