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Replace these with versions built using an older toolset (so as to avoid ABI compatibilities when linking on Ubuntu 14.04 for packaging purposes)
author Chris Cannam
date Fri, 07 Feb 2020 11:51:13 +0000
parents d0c2a83c1364
children
rev   line source
Chris@82 1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
Chris@82 2 <html>
Chris@82 3 <!-- This manual is for FFTW
Chris@82 4 (version 3.3.8, 24 May 2018).
Chris@82 5
Chris@82 6 Copyright (C) 2003 Matteo Frigo.
Chris@82 7
Chris@82 8 Copyright (C) 2003 Massachusetts Institute of Technology.
Chris@82 9
Chris@82 10 Permission is granted to make and distribute verbatim copies of this
Chris@82 11 manual provided the copyright notice and this permission notice are
Chris@82 12 preserved on all copies.
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Chris@82 24 <head>
Chris@82 25 <title>FFTW 3.3.8: Installation on Unix</title>
Chris@82 26
Chris@82 27 <meta name="description" content="FFTW 3.3.8: Installation on Unix">
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Chris@82 69
Chris@82 70 <body lang="en">
Chris@82 71 <a name="Installation-on-Unix"></a>
Chris@82 72 <div class="header">
Chris@82 73 <p>
Chris@82 74 Next: <a href="Installation-on-non_002dUnix-systems.html#Installation-on-non_002dUnix-systems" accesskey="n" rel="next">Installation on non-Unix systems</a>, Previous: <a href="Installation-and-Customization.html#Installation-and-Customization" accesskey="p" rel="prev">Installation and Customization</a>, Up: <a href="Installation-and-Customization.html#Installation-and-Customization" accesskey="u" rel="up">Installation and Customization</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>
Chris@82 75 </div>
Chris@82 76 <hr>
Chris@82 77 <a name="Installation-on-Unix-1"></a>
Chris@82 78 <h3 class="section">10.1 Installation on Unix</h3>
Chris@82 79
Chris@82 80 <p>FFTW comes with a <code>configure</code> program in the GNU style.
Chris@82 81 Installation can be as simple as:
Chris@82 82 <a name="index-configure-2"></a>
Chris@82 83 </p>
Chris@82 84 <div class="example">
Chris@82 85 <pre class="example">./configure
Chris@82 86 make
Chris@82 87 make install
Chris@82 88 </pre></div>
Chris@82 89
Chris@82 90 <p>This will build the uniprocessor complex and real transform libraries
Chris@82 91 along with the test programs. (We recommend that you use GNU
Chris@82 92 <code>make</code> if it is available; on some systems it is called
Chris@82 93 <code>gmake</code>.) The &ldquo;<code>make install</code>&rdquo; command installs the fftw
Chris@82 94 and rfftw libraries in standard places, and typically requires root
Chris@82 95 privileges (unless you specify a different install directory with the
Chris@82 96 <code>--prefix</code> flag to <code>configure</code>). You can also type
Chris@82 97 &ldquo;<code>make check</code>&rdquo; to put the FFTW test programs through their paces.
Chris@82 98 If you have problems during configuration or compilation, you may want
Chris@82 99 to run &ldquo;<code>make distclean</code>&rdquo; before trying again; this ensures that
Chris@82 100 you don&rsquo;t have any stale files left over from previous compilation
Chris@82 101 attempts.
Chris@82 102 </p>
Chris@82 103 <p>The <code>configure</code> script chooses the <code>gcc</code> compiler by default,
Chris@82 104 if it is available; you can select some other compiler with:
Chris@82 105 </p><div class="example">
Chris@82 106 <pre class="example">./configure CC=&quot;<span class="roman"><i>&lt;the name of your C compiler&gt;</i></span>&quot;
Chris@82 107 </pre></div>
Chris@82 108
Chris@82 109 <p>The <code>configure</code> script knows good <code>CFLAGS</code> (C compiler flags)
Chris@82 110 <a name="index-compiler-flags"></a>
Chris@82 111 for a few systems. If your system is not known, the <code>configure</code>
Chris@82 112 script will print out a warning. In this case, you should re-configure
Chris@82 113 FFTW with the command
Chris@82 114 </p><div class="example">
Chris@82 115 <pre class="example">./configure CFLAGS=&quot;<span class="roman"><i>&lt;write your CFLAGS here&gt;</i></span>&quot;
Chris@82 116 </pre></div>
Chris@82 117 <p>and then compile as usual. If you do find an optimal set of
Chris@82 118 <code>CFLAGS</code> for your system, please let us know what they are (along
Chris@82 119 with the output of <code>config.guess</code>) so that we can include them in
Chris@82 120 future releases.
Chris@82 121 </p>
Chris@82 122 <p><code>configure</code> supports all the standard flags defined by the GNU
Chris@82 123 Coding Standards; see the <code>INSTALL</code> file in FFTW or
Chris@82 124 <a href="http://www.gnu.org/prep/standards/html_node/index.html">the GNU web page</a>.
Chris@82 125 Note especially <code>--help</code> to list all flags and
Chris@82 126 <code>--enable-shared</code> to create shared, rather than static, libraries.
Chris@82 127 <code>configure</code> also accepts a few FFTW-specific flags, particularly:
Chris@82 128 </p>
Chris@82 129 <ul>
Chris@82 130 <li> <a name="index-precision-9"></a>
Chris@82 131 <code>--enable-float</code>: Produces a single-precision version of FFTW
Chris@82 132 (<code>float</code>) instead of the default double-precision (<code>double</code>).
Chris@82 133 See <a href="Precision.html#Precision">Precision</a>.
Chris@82 134
Chris@82 135 </li><li> <a name="index-precision-10"></a>
Chris@82 136 <code>--enable-long-double</code>: Produces a long-double precision version of
Chris@82 137 FFTW (<code>long double</code>) instead of the default double-precision
Chris@82 138 (<code>double</code>). The <code>configure</code> script will halt with an error
Chris@82 139 message if <code>long double</code> is the same size as <code>double</code> on your
Chris@82 140 machine/compiler. See <a href="Precision.html#Precision">Precision</a>.
Chris@82 141
Chris@82 142 </li><li> <a name="index-precision-11"></a>
Chris@82 143 <code>--enable-quad-precision</code>: Produces a quadruple-precision version
Chris@82 144 of FFTW using the nonstandard <code>__float128</code> type provided by
Chris@82 145 <code>gcc</code> 4.6 or later on x86, x86-64, and Itanium architectures,
Chris@82 146 instead of the default double-precision (<code>double</code>). The
Chris@82 147 <code>configure</code> script will halt with an error message if the
Chris@82 148 compiler is not <code>gcc</code> version 4.6 or later or if <code>gcc</code>&rsquo;s
Chris@82 149 <code>libquadmath</code> library is not installed. See <a href="Precision.html#Precision">Precision</a>.
Chris@82 150
Chris@82 151 </li><li> <a name="index-threads-3"></a>
Chris@82 152 <code>--enable-threads</code>: Enables compilation and installation of the
Chris@82 153 FFTW threads library (see <a href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW">Multi-threaded FFTW</a>), which provides a
Chris@82 154 simple interface to parallel transforms for SMP systems. By default,
Chris@82 155 the threads routines are not compiled.
Chris@82 156
Chris@82 157 </li><li> <code>--enable-openmp</code>: Like <code>--enable-threads</code>, but using OpenMP
Chris@82 158 compiler directives in order to induce parallelism rather than
Chris@82 159 spawning its own threads directly, and installing an &lsquo;<samp>fftw3_omp</samp>&rsquo; library
Chris@82 160 rather than an &lsquo;<samp>fftw3_threads</samp>&rsquo; library (see <a href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW">Multi-threaded FFTW</a>). You can use both <code>--enable-openmp</code> and <code>--enable-threads</code>
Chris@82 161 since they compile/install libraries with different names. By default,
Chris@82 162 the OpenMP routines are not compiled.
Chris@82 163
Chris@82 164 </li><li> <code>--with-combined-threads</code>: By default, if <code>--enable-threads</code>
Chris@82 165 is used, the threads support is compiled into a separate library that
Chris@82 166 must be linked in addition to the main FFTW library. This is so that
Chris@82 167 users of the serial library do not need to link the system threads
Chris@82 168 libraries. If <code>--with-combined-threads</code> is specified, however,
Chris@82 169 then no separate threads library is created, and threads are included
Chris@82 170 in the main FFTW library. This is mainly useful under Windows, where
Chris@82 171 no system threads library is required and inter-library dependencies
Chris@82 172 are problematic.
Chris@82 173
Chris@82 174 </li><li> <a name="index-MPI-1"></a>
Chris@82 175 <code>--enable-mpi</code>: Enables compilation and installation of the FFTW
Chris@82 176 MPI library (see <a href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI">Distributed-memory FFTW with MPI</a>), which provides
Chris@82 177 parallel transforms for distributed-memory systems with MPI. (By
Chris@82 178 default, the MPI routines are not compiled.) See <a href="FFTW-MPI-Installation.html#FFTW-MPI-Installation">FFTW MPI Installation</a>.
Chris@82 179
Chris@82 180 </li><li> <a name="index-Fortran_002dcallable-wrappers"></a>
Chris@82 181 <code>--disable-fortran</code>: Disables inclusion of legacy-Fortran
Chris@82 182 wrapper routines (see <a href="Calling-FFTW-from-Legacy-Fortran.html#Calling-FFTW-from-Legacy-Fortran">Calling FFTW from Legacy Fortran</a>) in the standard
Chris@82 183 FFTW libraries. These wrapper routines increase the library size by
Chris@82 184 only a negligible amount, so they are included by default as long as
Chris@82 185 the <code>configure</code> script finds a Fortran compiler on your system.
Chris@82 186 (To specify a particular Fortran compiler <i>foo</i>, pass
Chris@82 187 <code>F77=</code><i>foo</i> to <code>configure</code>.)
Chris@82 188
Chris@82 189 </li><li> <code>--with-g77-wrappers</code>: By default, when Fortran wrappers are
Chris@82 190 included, the wrappers employ the linking conventions of the Fortran
Chris@82 191 compiler detected by the <code>configure</code> script. If this compiler is
Chris@82 192 GNU <code>g77</code>, however, then <em>two</em> versions of the wrappers are
Chris@82 193 included: one with <code>g77</code>&rsquo;s idiosyncratic convention of appending
Chris@82 194 two underscores to identifiers, and one with the more common
Chris@82 195 convention of appending only a single underscore. This way, the same
Chris@82 196 FFTW library will work with both <code>g77</code> and other Fortran
Chris@82 197 compilers, such as GNU <code>gfortran</code>. However, the converse is not
Chris@82 198 true: if you configure with a different compiler, then the
Chris@82 199 <code>g77</code>-compatible wrappers are not included. By specifying
Chris@82 200 <code>--with-g77-wrappers</code>, the <code>g77</code>-compatible wrappers are
Chris@82 201 included in addition to wrappers for whatever Fortran compiler
Chris@82 202 <code>configure</code> finds.
Chris@82 203 <a name="index-g77"></a>
Chris@82 204
Chris@82 205 </li><li> <code>--with-slow-timer</code>: Disables the use of hardware cycle counters,
Chris@82 206 and falls back on <code>gettimeofday</code> or <code>clock</code>. This greatly
Chris@82 207 worsens performance, and should generally not be used (unless you don&rsquo;t
Chris@82 208 have a cycle counter but still really want an optimized plan regardless
Chris@82 209 of the time). See <a href="Cycle-Counters.html#Cycle-Counters">Cycle Counters</a>.
Chris@82 210
Chris@82 211 </li><li> <code>--enable-sse</code> (single precision),
Chris@82 212 <code>--enable-sse2</code> (single, double),
Chris@82 213 <code>--enable-avx</code> (single, double),
Chris@82 214 <code>--enable-avx2</code> (single, double),
Chris@82 215 <code>--enable-avx512</code> (single, double),
Chris@82 216 <code>--enable-avx-128-fma</code>,
Chris@82 217 <code>--enable-kcvi</code> (single),
Chris@82 218 <code>--enable-altivec</code> (single),
Chris@82 219 <code>--enable-vsx</code> (single, double),
Chris@82 220 <code>--enable-neon</code> (single, double on aarch64),
Chris@82 221 <code>--enable-generic-simd128</code>,
Chris@82 222 and
Chris@82 223 <code>--enable-generic-simd256</code>:
Chris@82 224
Chris@82 225 <p>Enable various SIMD instruction sets. You need compiler that supports
Chris@82 226 the given SIMD extensions, but FFTW will try to detect at runtime
Chris@82 227 whether the CPU supports these extensions. That is, you can compile
Chris@82 228 with<code>--enable-avx</code> and the code will still run on a CPU without AVX
Chris@82 229 support.
Chris@82 230 </p>
Chris@82 231 <ul class="no-bullet">
Chris@82 232 <li>- These options require a compiler supporting SIMD extensions, and
Chris@82 233 compiler support is always a bit flaky: see the FFTW FAQ for a list of
Chris@82 234 compiler versions that have problems compiling FFTW.
Chris@82 235 </li><li>- Because of the large variety of ARM processors and ABIs, FFTW
Chris@82 236 does not attempt to guess the correct <code>gcc</code> flags for generating
Chris@82 237 NEON code. In general, you will have to provide them on the command line.
Chris@82 238 This command line is known to have worked at least once:
Chris@82 239 <div class="example">
Chris@82 240 <pre class="example">./configure --with-slow-timer --host=arm-linux-gnueabi \
Chris@82 241 --enable-single --enable-neon \
Chris@82 242 &quot;CC=arm-linux-gnueabi-gcc -march=armv7-a -mfloat-abi=softfp&quot;
Chris@82 243 </pre></div>
Chris@82 244 </li></ul>
Chris@82 245
Chris@82 246 </li></ul>
Chris@82 247
Chris@82 248 <a name="index-compiler-2"></a>
Chris@82 249 <p>To force <code>configure</code> to use a particular C compiler <i>foo</i>
Chris@82 250 (instead of the default, usually <code>gcc</code>), pass <code>CC=</code><i>foo</i> to the
Chris@82 251 <code>configure</code> script; you may also need to set the flags via the variable
Chris@82 252 <code>CFLAGS</code> as described above.
Chris@82 253 <a name="index-compiler-flags-1"></a>
Chris@82 254 </p>
Chris@82 255 <hr>
Chris@82 256 <div class="header">
Chris@82 257 <p>
Chris@82 258 Next: <a href="Installation-on-non_002dUnix-systems.html#Installation-on-non_002dUnix-systems" accesskey="n" rel="next">Installation on non-Unix systems</a>, Previous: <a href="Installation-and-Customization.html#Installation-and-Customization" accesskey="p" rel="prev">Installation and Customization</a>, Up: <a href="Installation-and-Customization.html#Installation-and-Customization" accesskey="u" rel="up">Installation and Customization</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>
Chris@82 259 </div>
Chris@82 260
Chris@82 261
Chris@82 262
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Chris@82 264 </html>