Mercurial > hg > sv-dependency-builds
diff src/fftw-3.3.3/doc/html/Installation-and-Supported-Hardware_002fSoftware.html @ 10:37bf6b4a2645
Add FFTW3
| author | Chris Cannam |
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| date | Wed, 20 Mar 2013 15:35:50 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/fftw-3.3.3/doc/html/Installation-and-Supported-Hardware_002fSoftware.html Wed Mar 20 15:35:50 2013 +0000 @@ -0,0 +1,92 @@ +<html lang="en"> +<head> +<title>Installation and Supported Hardware/Software - FFTW 3.3.3</title> +<meta http-equiv="Content-Type" content="text/html"> +<meta name="description" content="FFTW 3.3.3"> +<meta name="generator" content="makeinfo 4.13"> +<link title="Top" rel="start" href="index.html#Top"> +<link rel="up" href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW" title="Multi-threaded FFTW"> +<link rel="prev" href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW" title="Multi-threaded FFTW"> +<link rel="next" href="Usage-of-Multi_002dthreaded-FFTW.html#Usage-of-Multi_002dthreaded-FFTW" title="Usage of Multi-threaded FFTW"> +<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> +<!-- +This manual is for FFTW +(version 3.3.3, 25 November 2012). + +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. + --> +<meta http-equiv="Content-Style-Type" content="text/css"> +<style type="text/css"><!-- + pre.display { font-family:inherit } + pre.format { font-family:inherit } + pre.smalldisplay { font-family:inherit; font-size:smaller } + pre.smallformat { font-family:inherit; font-size:smaller } + pre.smallexample { font-size:smaller } + pre.smalllisp { font-size:smaller } + span.sc { font-variant:small-caps } + span.roman { font-family:serif; font-weight:normal; } + span.sansserif { font-family:sans-serif; font-weight:normal; } +--></style> +</head> +<body> +<div class="node"> +<a name="Installation-and-Supported-Hardware%2fSoftware"></a> +<a name="Installation-and-Supported-Hardware_002fSoftware"></a> +<p> +Next: <a rel="next" accesskey="n" href="Usage-of-Multi_002dthreaded-FFTW.html#Usage-of-Multi_002dthreaded-FFTW">Usage of Multi-threaded FFTW</a>, +Previous: <a rel="previous" accesskey="p" href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW">Multi-threaded FFTW</a>, +Up: <a rel="up" accesskey="u" href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW">Multi-threaded FFTW</a> +<hr> +</div> + +<h3 class="section">5.1 Installation and Supported Hardware/Software</h3> + +<p>All of the FFTW threads code is located in the <code>threads</code> +subdirectory of the FFTW package. On Unix systems, the FFTW threads +libraries and header files can be automatically configured, compiled, +and installed along with the uniprocessor FFTW libraries simply by +including <code>--enable-threads</code> in the flags to the <code>configure</code> +script (see <a href="Installation-on-Unix.html#Installation-on-Unix">Installation on Unix</a>), or <code>--enable-openmp</code> to use +<a href="http://www.openmp.org">OpenMP</a> threads. +<a name="index-configure-329"></a> + + <p><a name="index-portability-330"></a><a name="index-OpenMP-331"></a>The threads routines require your operating system to have some sort +of shared-memory threads support. Specifically, the FFTW threads +package works with POSIX threads (available on most Unix variants, +from GNU/Linux to MacOS X) and Win32 threads. OpenMP threads, which +are supported in many common compilers (e.g. gcc) are also supported, +and may give better performance on some systems. (OpenMP threads are +also useful if you are employing OpenMP in your own code, in order to +minimize conflicts between threading models.) If you have a +shared-memory machine that uses a different threads API, it should be +a simple matter of programming to include support for it; see the file +<code>threads/threads.c</code> for more detail. + + <p>You can compile FFTW with <em>both</em> <code>--enable-threads</code> and +<code>--enable-openmp</code> at the same time, since they install libraries +with different names (‘<samp><span class="samp">fftw3_threads</span></samp>’ and ‘<samp><span class="samp">fftw3_omp</span></samp>’, as +described below). However, your programs may only link to <em>one</em> +of these two libraries at a time. + + <p>Ideally, of course, you should also have multiple processors in order to +get any benefit from the threaded transforms. + +<!-- --> + </body></html> +