100 lines
4.1 KiB
HTML
100 lines
4.1 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<!-- This manual is for FFTW
|
|
(version 3.3.10, 10 December 2020).
|
|
|
|
Copyright (C) 2003 Matteo Frigo.
|
|
|
|
Copyright (C) 2003 Massachusetts Institute of Technology.
|
|
|
|
Permission is granted to make and distribute verbatim copies of this
|
|
manual provided the copyright notice and this permission notice are
|
|
preserved on all copies.
|
|
|
|
Permission is granted to copy and distribute modified versions of this
|
|
manual under the conditions for verbatim copying, provided that the
|
|
entire resulting derived work is distributed under the terms of a
|
|
permission notice identical to this one.
|
|
|
|
Permission is granted to copy and distribute translations of this manual
|
|
into another language, under the above conditions for modified versions,
|
|
except that this permission notice may be stated in a translation
|
|
approved by the Free Software Foundation. -->
|
|
<!-- Created by GNU Texinfo 6.7, http://www.gnu.org/software/texinfo/ -->
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
|
<title>Defining an FFTW module (FFTW 3.3.10)</title>
|
|
|
|
<meta name="description" content="Defining an FFTW module (FFTW 3.3.10)">
|
|
<meta name="keywords" content="Defining an FFTW module (FFTW 3.3.10)">
|
|
<meta name="resource-type" content="document">
|
|
<meta name="distribution" content="global">
|
|
<meta name="Generator" content="makeinfo">
|
|
<link href="index.html" rel="start" title="Top">
|
|
<link href="Concept-Index.html" rel="index" title="Concept Index">
|
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
|
<link href="Calling-FFTW-from-Modern-Fortran.html" rel="up" title="Calling FFTW from Modern Fortran">
|
|
<link href="Calling-FFTW-from-Legacy-Fortran.html" rel="next" title="Calling FFTW from Legacy Fortran">
|
|
<link href="Wisdom-Generic-Export_002fImport-from-Fortran.html" rel="prev" title="Wisdom Generic Export/Import from Fortran">
|
|
<style type="text/css">
|
|
<!--
|
|
a.summary-letter {text-decoration: none}
|
|
blockquote.indentedblock {margin-right: 0em}
|
|
div.display {margin-left: 3.2em}
|
|
div.example {margin-left: 3.2em}
|
|
div.lisp {margin-left: 3.2em}
|
|
kbd {font-style: oblique}
|
|
pre.display {font-family: inherit}
|
|
pre.format {font-family: inherit}
|
|
pre.menu-comment {font-family: serif}
|
|
pre.menu-preformatted {font-family: serif}
|
|
span.nolinebreak {white-space: nowrap}
|
|
span.roman {font-family: initial; font-weight: normal}
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
|
ul.no-bullet {list-style: none}
|
|
-->
|
|
</style>
|
|
|
|
|
|
</head>
|
|
|
|
<body lang="en">
|
|
<span id="Defining-an-FFTW-module"></span><div class="header">
|
|
<p>
|
|
Previous: <a href="Accessing-the-wisdom-API-from-Fortran.html" accesskey="p" rel="prev">Accessing the wisdom API from Fortran</a>, Up: <a href="Calling-FFTW-from-Modern-Fortran.html" accesskey="u" rel="up">Calling FFTW from Modern Fortran</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>
|
|
</div>
|
|
<hr>
|
|
<span id="Defining-an-FFTW-module-1"></span><h3 class="section">7.7 Defining an FFTW module</h3>
|
|
|
|
<p>Rather than using the <code>include</code> statement to include the
|
|
<code>fftw3.f03</code> interface file in any subroutine where you want to
|
|
use FFTW, you might prefer to define an FFTW Fortran module. FFTW
|
|
does not install itself as a module, primarily because
|
|
<code>fftw3.f03</code> can be shared between different Fortran compilers while
|
|
modules (in general) cannot. However, it is trivial to define your
|
|
own FFTW module if you want. Just create a file containing:
|
|
</p>
|
|
<div class="example">
|
|
<pre class="example"> module FFTW3
|
|
use, intrinsic :: iso_c_binding
|
|
include 'fftw3.f03'
|
|
end module
|
|
</pre></div>
|
|
|
|
<p>Compile this file into a module as usual for your compiler (e.g. with
|
|
<code>gfortran -c</code> you will get a file <code>fftw3.mod</code>). Now,
|
|
instead of <code>include 'fftw3.f03'</code>, whenever you want to use FFTW
|
|
routines you can just do:
|
|
</p>
|
|
<div class="example">
|
|
<pre class="example"> use FFTW3
|
|
</pre></div>
|
|
|
|
<p>as usual for Fortran modules. (You still need to link to the FFTW
|
|
library, of course.)
|
|
</p>
|
|
|
|
|
|
</body>
|
|
</html>
|