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author Chris Cannam
date Wed, 07 Sep 2016 10:40:32 +0100
parents 26056e866c29
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Chris@19 1 <html lang="en">
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Chris@19 3 <title>FFTW MPI Installation - FFTW 3.3.4</title>
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Chris@19 13 This manual is for FFTW
Chris@19 14 (version 3.3.4, 20 September 2013).
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Chris@19 48 <div class="node">
Chris@19 49 <a name="FFTW-MPI-Installation"></a>
Chris@19 50 <p>
Chris@19 51 Next:&nbsp;<a rel="next" accesskey="n" href="Linking-and-Initializing-MPI-FFTW.html#Linking-and-Initializing-MPI-FFTW">Linking and Initializing MPI FFTW</a>,
Chris@19 52 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>,
Chris@19 53 Up:&nbsp;<a rel="up" accesskey="u" href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI">Distributed-memory FFTW with MPI</a>
Chris@19 54 <hr>
Chris@19 55 </div>
Chris@19 56
Chris@19 57 <h3 class="section">6.1 FFTW MPI Installation</h3>
Chris@19 58
Chris@19 59 <p>All of the FFTW MPI code is located in the <code>mpi</code> subdirectory of
Chris@19 60 the FFTW package. On Unix systems, the FFTW MPI libraries and header
Chris@19 61 files are automatically configured, compiled, and installed along with
Chris@19 62 the uniprocessor FFTW libraries simply by including
Chris@19 63 <code>--enable-mpi</code> in the flags to the <code>configure</code> script
Chris@19 64 (see <a href="Installation-on-Unix.html#Installation-on-Unix">Installation on Unix</a>).
Chris@19 65 <a name="index-configure-352"></a>
Chris@19 66
Chris@19 67 <p>Any implementation of the MPI standard, version 1 or later, should
Chris@19 68 work with FFTW. The <code>configure</code> script will attempt to
Chris@19 69 automatically detect how to compile and link code using your MPI
Chris@19 70 implementation. In some cases, especially if you have multiple
Chris@19 71 different MPI implementations installed or have an unusual MPI
Chris@19 72 software package, you may need to provide this information explicitly.
Chris@19 73
Chris@19 74 <p>Most commonly, one compiles MPI code by invoking a special compiler
Chris@19 75 command, typically <code>mpicc</code> for C code. The <code>configure</code>
Chris@19 76 script knows the most common names for this command, but you can
Chris@19 77 specify the MPI compilation command explicitly by setting the
Chris@19 78 <code>MPICC</code> variable, as in &lsquo;<samp><span class="samp">./configure MPICC=mpicc ...</span></samp>&rsquo;.
Chris@19 79 <a name="index-mpicc-353"></a>
Chris@19 80
Chris@19 81 <p>If, instead of a special compiler command, you need to link a certain
Chris@19 82 library, you can specify the link command via the <code>MPILIBS</code>
Chris@19 83 variable, as in &lsquo;<samp><span class="samp">./configure MPILIBS=-lmpi ...</span></samp>&rsquo;. Note that if
Chris@19 84 your MPI library is installed in a non-standard location (one the
Chris@19 85 compiler does not know about by default), you may also have to specify
Chris@19 86 the location of the library and header files via <code>LDFLAGS</code> and
Chris@19 87 <code>CPPFLAGS</code> variables, respectively, as in &lsquo;<samp><span class="samp">./configure
Chris@19 88 LDFLAGS=-L/path/to/mpi/libs CPPFLAGS=-I/path/to/mpi/include ...</span></samp>&rsquo;.
Chris@19 89
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Chris@19 92