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Current fftw source
author Chris Cannam
date Tue, 18 Oct 2016 13:40:26 +0100
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3 <!-- This manual is for FFTW
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25 <title>FFTW 3.3.5: FFTW MPI Installation</title>
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36 <link href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI" rel="up" title="Distributed-memory FFTW with MPI">
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72 <a name="FFTW-MPI-Installation"></a>
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74 <p>
75 Next: <a href="Linking-and-Initializing-MPI-FFTW.html#Linking-and-Initializing-MPI-FFTW" accesskey="n" rel="next">Linking and Initializing MPI FFTW</a>, Previous: <a href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI" accesskey="p" rel="prev">Distributed-memory FFTW with MPI</a>, Up: <a href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI" accesskey="u" rel="up">Distributed-memory FFTW with MPI</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>
76 </div>
77 <hr>
78 <a name="FFTW-MPI-Installation-1"></a>
79 <h3 class="section">6.1 FFTW MPI Installation</h3>
80
81 <p>All of the FFTW MPI code is located in the <code>mpi</code> subdirectory of
82 the FFTW package. On Unix systems, the FFTW MPI libraries and header
83 files are automatically configured, compiled, and installed along with
84 the uniprocessor FFTW libraries simply by including
85 <code>--enable-mpi</code> in the flags to the <code>configure</code> script
86 (see <a href="Installation-on-Unix.html#Installation-on-Unix">Installation on Unix</a>).
87 <a name="index-configure-1"></a>
88 </p>
89
90 <p>Any implementation of the MPI standard, version 1 or later, should
91 work with FFTW. The <code>configure</code> script will attempt to
92 automatically detect how to compile and link code using your MPI
93 implementation. In some cases, especially if you have multiple
94 different MPI implementations installed or have an unusual MPI
95 software package, you may need to provide this information explicitly.
96 </p>
97 <p>Most commonly, one compiles MPI code by invoking a special compiler
98 command, typically <code>mpicc</code> for C code. The <code>configure</code>
99 script knows the most common names for this command, but you can
100 specify the MPI compilation command explicitly by setting the
101 <code>MPICC</code> variable, as in &lsquo;<samp>./configure MPICC=mpicc ...</samp>&rsquo;.
102 <a name="index-mpicc"></a>
103 </p>
104
105 <p>If, instead of a special compiler command, you need to link a certain
106 library, you can specify the link command via the <code>MPILIBS</code>
107 variable, as in &lsquo;<samp>./configure MPILIBS=-lmpi ...</samp>&rsquo;. Note that if
108 your MPI library is installed in a non-standard location (one the
109 compiler does not know about by default), you may also have to specify
110 the location of the library and header files via <code>LDFLAGS</code> and
111 <code>CPPFLAGS</code> variables, respectively, as in &lsquo;<samp>./configure
112 LDFLAGS=-L/path/to/mpi/libs CPPFLAGS=-I/path/to/mpi/include ...</samp>&rsquo;.
113 </p>
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