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Add FFTW3
author Chris Cannam
date Wed, 20 Mar 2013 15:35:50 +0000
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+<html lang="en">
+<head>
+<title>Calling FFTW from Modern Fortran - FFTW 3.3.3</title>
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+<link rel="next" href="Calling-FFTW-from-Legacy-Fortran.html#Calling-FFTW-from-Legacy-Fortran" title="Calling FFTW from Legacy Fortran">
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+<!--
+This manual is for FFTW
+(version 3.3.3, 25 November 2012).
+
+Copyright (C) 2003 Matteo Frigo.
+
+Copyright (C) 2003 Massachusetts Institute of Technology.
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+     this manual provided the copyright notice and this permission
+     notice are preserved on all copies.
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+<a name="Calling-FFTW-from-Modern-Fortran"></a>
+<p>
+Next:&nbsp;<a rel="next" accesskey="n" href="Calling-FFTW-from-Legacy-Fortran.html#Calling-FFTW-from-Legacy-Fortran">Calling FFTW from Legacy Fortran</a>,
+Previous:&nbsp;<a rel="previous" accesskey="p" href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI">Distributed-memory FFTW with MPI</a>,
+Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+<hr>
+</div>
+
+<h2 class="chapter">7 Calling FFTW from Modern Fortran</h2>
+
+<p><a name="index-Fortran-interface-500"></a>
+Fortran 2003 standardized ways for Fortran code to call C libraries,
+and this allows us to support a direct translation of the FFTW C API
+into Fortran.  Compared to the legacy Fortran 77 interface
+(see <a href="Calling-FFTW-from-Legacy-Fortran.html#Calling-FFTW-from-Legacy-Fortran">Calling FFTW from Legacy Fortran</a>), this direct interface
+offers many advantages, especially compile-time type-checking and
+aligned memory allocation.  As of this writing, support for these C
+interoperability features seems widespread, having been implemented in
+nearly all major Fortran compilers (e.g. GNU, Intel, IBM,
+Oracle/Solaris, Portland Group, NAG). 
+<a name="index-portability-501"></a>
+This chapter documents that interface.  For the most part, since this
+interface allows Fortran to call the C interface directly, the usage
+is identical to C translated to Fortran syntax.  However, there are a
+few subtle points such as memory allocation, wisdom, and data types
+that deserve closer attention.
+
+<ul class="menu">
+<li><a accesskey="1" href="Overview-of-Fortran-interface.html#Overview-of-Fortran-interface">Overview of Fortran interface</a>
+<li><a accesskey="2" href="Reversing-array-dimensions.html#Reversing-array-dimensions">Reversing array dimensions</a>
+<li><a accesskey="3" href="FFTW-Fortran-type-reference.html#FFTW-Fortran-type-reference">FFTW Fortran type reference</a>
+<li><a accesskey="4" href="Plan-execution-in-Fortran.html#Plan-execution-in-Fortran">Plan execution in Fortran</a>
+<li><a accesskey="5" href="Allocating-aligned-memory-in-Fortran.html#Allocating-aligned-memory-in-Fortran">Allocating aligned memory in Fortran</a>
+<li><a accesskey="6" href="Accessing-the-wisdom-API-from-Fortran.html#Accessing-the-wisdom-API-from-Fortran">Accessing the wisdom API from Fortran</a>
+<li><a accesskey="7" href="Defining-an-FFTW-module.html#Defining-an-FFTW-module">Defining an FFTW module</a>
+</ul>
+
+<!--  -->
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