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Add null config files
author Chris Cannam <cannam@all-day-breakfast.com>
date Mon, 02 Mar 2020 14:03:47 +0000
parents bd3cc4d1df30
children
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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.
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cannam@167 10 Permission is granted to make and distribute verbatim copies of this
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cannam@167 24 <head>
cannam@167 25 <title>FFTW 3.3.8: Calling FFTW from Legacy Fortran</title>
cannam@167 26
cannam@167 27 <meta name="description" content="FFTW 3.3.8: Calling FFTW from Legacy Fortran">
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cannam@167 37 <link href="Fortran_002dinterface-routines.html#Fortran_002dinterface-routines" rel="next" title="Fortran-interface routines">
cannam@167 38 <link href="Defining-an-FFTW-module.html#Defining-an-FFTW-module" rel="prev" title="Defining an FFTW module">
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cannam@167 68 </head>
cannam@167 69
cannam@167 70 <body lang="en">
cannam@167 71 <a name="Calling-FFTW-from-Legacy-Fortran"></a>
cannam@167 72 <div class="header">
cannam@167 73 <p>
cannam@167 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>
cannam@167 75 </div>
cannam@167 76 <hr>
cannam@167 77 <a name="Calling-FFTW-from-Legacy-Fortran-1"></a>
cannam@167 78 <h2 class="chapter">8 Calling FFTW from Legacy Fortran</h2>
cannam@167 79 <a name="index-Fortran-interface-3"></a>
cannam@167 80
cannam@167 81 <p>This chapter describes the interface to FFTW callable by Fortran code
cannam@167 82 in older compilers not supporting the Fortran 2003 C interoperability
cannam@167 83 features (see <a href="Calling-FFTW-from-Modern-Fortran.html#Calling-FFTW-from-Modern-Fortran">Calling FFTW from Modern Fortran</a>). This interface
cannam@167 84 has the major disadvantage that it is not type-checked, so if you
cannam@167 85 mistake the argument types or ordering then your program will not have
cannam@167 86 any compiler errors, and will likely crash at runtime. So, greater
cannam@167 87 care is needed. Also, technically interfacing older Fortran versions
cannam@167 88 to C is nonstandard, but in practice we have found that the techniques
cannam@167 89 used in this chapter have worked with all known Fortran compilers for
cannam@167 90 many years.
cannam@167 91 </p>
cannam@167 92 <p>The legacy Fortran interface differs from the C interface only in the
cannam@167 93 prefix (&lsquo;<samp>dfftw_</samp>&rsquo; instead of &lsquo;<samp>fftw_</samp>&rsquo; in double precision) and
cannam@167 94 a few other minor details. This Fortran interface is included in the
cannam@167 95 FFTW libraries by default, unless a Fortran compiler isn&rsquo;t found on
cannam@167 96 your system or <code>--disable-fortran</code> is included in the
cannam@167 97 <code>configure</code> flags. We assume here that the reader is already
cannam@167 98 familiar with the usage of FFTW in C, as described elsewhere in this
cannam@167 99 manual.
cannam@167 100 </p>
cannam@167 101 <p>The MPI parallel interface to FFTW is <em>not</em> currently available
cannam@167 102 to legacy Fortran.
cannam@167 103 </p>
cannam@167 104 <table class="menu" border="0" cellspacing="0">
cannam@167 105 <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">
cannam@167 106 </td></tr>
cannam@167 107 <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">
cannam@167 108 </td></tr>
cannam@167 109 <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">
cannam@167 110 </td></tr>
cannam@167 111 <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">
cannam@167 112 </td></tr>
cannam@167 113 <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">
cannam@167 114 </td></tr>
cannam@167 115 </table>
cannam@167 116
cannam@167 117 <hr>
cannam@167 118 <div class="header">
cannam@167 119 <p>
cannam@167 120 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>
cannam@167 121 </div>
cannam@167 122
cannam@167 123
cannam@167 124
cannam@167 125 </body>
cannam@167 126 </html>