mirror of
https://github.com/Zeckmathederg/glfs.git
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325 lines
9.9 KiB
XML
325 lines
9.9 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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<!ENTITY fftw-download-http "http://www.fftw.org/fftw-&fftw-version;.tar.gz">
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<!ENTITY fftw-download-ftp "ftp://ftp.fftw.org/pub/fftw/fftw-&fftw-version;.tar.gz ">
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<!ENTITY fftw-md5sum "8ccbf6a5ea78a16dbc3e1306e234cc5c">
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<!ENTITY fftw-size "4.0 MB">
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<!ENTITY fftw-buildsize "59 MB">
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<!ENTITY fftw-time "1.6 SBU (add 3.4 SBU for tests, both using parallelism=4)">
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]>
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<sect1 id="fftw" xreflabel="fftw-&fftw-version;">
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<?dbhtml filename="fftw.html"?>
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<sect1info>
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<date>$Date$</date>
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</sect1info>
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<title>fftw-&fftw-version;</title>
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<indexterm zone="fftw">
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<primary sortas="a-fftw">fftw</primary>
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</indexterm>
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<sect2 role="package">
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<title>Introduction to fftw</title>
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<para>
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FFTW is a C subroutine library for computing the discrete Fourier
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transform (DFT) in one or more dimensions, of arbitrary input size, and
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of both real and complex data (as well as of even/odd data, i.e. the
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discrete cosine/sine transforms or DCT/DST).
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</para>
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&lfs111_checked;
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<bridgehead renderas="sect3">Package Information</bridgehead>
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<itemizedlist spacing="compact">
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<listitem>
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<para>
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Download (HTTP): <ulink url="&fftw-download-http;"/>
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</para>
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</listitem>
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<listitem>
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<para>
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Download (FTP): <ulink url="&fftw-download-ftp;"/>
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</para>
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</listitem>
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<listitem>
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<para>
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Download MD5 sum: &fftw-md5sum;
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</para>
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</listitem>
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<listitem>
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<para>
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Download size: &fftw-size;
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</para>
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</listitem>
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<listitem>
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<para>
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Estimated disk space required: &fftw-buildsize;
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</para>
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</listitem>
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<listitem>
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<para>
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Estimated build time: &fftw-time;
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</para>
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</listitem>
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</itemizedlist>
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<para condition="html" role="usernotes">
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User Notes: <ulink url="&blfs-wiki;/fftw"/>
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</para>
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</sect2>
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<sect2 role="installation">
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<title>Installation of fftw</title>
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<note>
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<para>
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We build fftw three times for different libraries in different
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numerical precisions: the default double precision floating point, the
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older 32-bit (single precision) version named float which sacrifices
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precision for speed, and the long double which offers increased
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precision at the cost of slower execution.
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</para>
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</note>
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<para>
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The first build is for double precision arithmetic. Install
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<application>fftw</application> by running the following commands:
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</para>
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<screen><userinput>./configure --prefix=/usr \
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--enable-shared \
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--disable-static \
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--enable-threads \
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--enable-sse2 \
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--enable-avx &&
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make</userinput></screen>
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<para>
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To test the results, issue: <command>make check</command>.
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On 32-bit systems, the tests can take substantially longer than
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they would on 64-bit machines.
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</para>
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<para>
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Now, as the <systemitem class="username">root</systemitem> user:
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</para>
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<screen role="root"><userinput>make install</userinput></screen>
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<para>
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Now build single precision:
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</para>
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<screen><userinput>make clean &&
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./configure --prefix=/usr \
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--enable-shared \
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--disable-static \
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--enable-threads \
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--enable-sse2 \
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--enable-avx \
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--enable-float &&
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make</userinput></screen>
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<para>
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As the <systemitem class="username">root</systemitem> user:
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</para>
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<screen role="root"><userinput>make install</userinput></screen>
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<para>
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Finally, build long double precision:
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</para>
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<screen><userinput>make clean &&
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./configure --prefix=/usr \
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--enable-shared \
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--disable-static \
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--enable-threads \
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--enable-long-double &&
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make</userinput></screen>
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<para>
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As the <systemitem class="username">root</systemitem> user:
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</para>
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<screen role="root"><userinput>make install</userinput></screen>
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</sect2>
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<sect2 role="commands">
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<title>Command Explanations</title>
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<para>
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<parameter>--enable-shared --disable-static</parameter>: Use shared
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libs instead of static libs.
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</para>
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<para>
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<parameter>--enable-threads</parameter>: This enables <filename
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class="libraryfile"> libfftw3_threads.so</filename> to be compiled.
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It is used by e.g. the <application>gimp</application> plugin from
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<ulink url="http://gmic.eu/">G'MIC</ulink>.
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</para>
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<para>
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<parameter>--enable-float</parameter>: This enables building the library that
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uses single precision floating point arithmetic. It is faster but less
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precise than the default double precision library. The library will be
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called <filename class="libraryfile">libfftw3f.so</filename> needed by
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<xref linkend="pulseaudio"/>.
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</para>
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<para>
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<parameter>--enable-long-double</parameter>: This enables building the
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library that uses higher precision long-double floating point arithmetic.
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The library will be called <filename
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class="libraryfile">libfftw3l.so</filename>.
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</para>
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</sect2>
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<sect2 role="content">
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<title>Contents</title>
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<segmentedlist>
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<segtitle>Installed Programs</segtitle>
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<segtitle>Installed Libraries</segtitle>
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<segtitle>Installed Directories</segtitle>
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<seglistitem>
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<seg>
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fftw-wisdom and fftw-wisdom-to-conf
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</seg>
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<seg>
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libfftw3.so, libfftw3_threads.so, libfftw3f.so,
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libfftw3f_threads.so, libfftw3l.so and libfftw3l_threads.so
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</seg>
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<seg>
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None
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</seg>
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</seglistitem>
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</segmentedlist>
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<variablelist>
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<bridgehead renderas="sect3">Short Descriptions</bridgehead>
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<?dbfo list-presentation="list"?>
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<?dbhtml list-presentation="table"?>
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<varlistentry id="fftw-wisdom">
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<term><command>fftw-wisdom</command></term>
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<listitem>
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<para>
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is a utility to generate FFTW wisdom files, which contain saved
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information about how to optimally compute (Fourier) transforms of
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various sizes
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</para>
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<indexterm zone="fftw fftw-wisdom">
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<primary sortas="b-fftw-wisdom">fftw-wisdom</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="fftw-wisdom-to-conf">
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<term><command>fftw-wisdom-to-conf</command></term>
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<listitem>
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<para>
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is a utility to generate C configuration routines from FFTW wisdom
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files, where the latter contain saved information about how to
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optimally compute (Fourier) transforms of various sizes
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</para>
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<indexterm zone="fftw fftw-wisdom-to-conf">
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<primary sortas="b-fftw-wisdom-to-conf">fftw-wisdom-to-conf</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libfftw3">
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<term><filename class="libraryfile">libfftw3.so</filename></term>
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<listitem>
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<para>
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is the Fast Fourier Transform library
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</para>
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<indexterm zone="fftw libfftw3">
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<primary sortas="c-libfftw3">libfftw3.so</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libfftw3_threads">
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<term><filename class="libraryfile">libfftw3_threads.so</filename></term>
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<listitem>
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<para>
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is the threaded Fast Fourier Transform library
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</para>
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<indexterm zone="fftw libfftw3_threads">
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<primary sortas="c-libfftw3_threads">libfftw3_threads.so</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libfftw3f">
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<term><filename class="libraryfile">libfftw3f.so</filename></term>
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<listitem>
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<para>
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is the single-precision Fast Fourier Transform library, described
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as <quote>float</quote> for historic reasons
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</para>
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<indexterm zone="fftw libfftw3f">
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<primary sortas="c-libfftw3f">libfftw3f.so</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libfftw3f_threads">
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<term><filename class="libraryfile">libfftw3f_threads.so</filename></term>
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<listitem>
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<para>
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is the threaded single-precision Fast Fourier Transform library
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</para>
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<indexterm zone="fftw libfftw3f_threads">
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<primary sortas="c-libfftw3f_threads">libfftw3f_threads.so</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libfftw3l">
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<term><filename class="libraryfile">libfftw3l.so</filename></term>
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<listitem>
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<para>
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is the long double Fast Fourier Transform library
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</para>
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<indexterm zone="fftw libfftw3l">
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<primary sortas="c-libfftw3l">libfftw3l.so</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libfftw3l_threads">
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<term><filename class="libraryfile">libfftw3l_threads.so</filename></term>
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<listitem>
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<para>
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is the threaded long double Fast Fourier Transform library
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</para>
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<indexterm zone="fftw libfftw3l_threads">
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<primary sortas="c-libfftw3l_threads">libfftw3l_threads.so</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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</variablelist>
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</sect2>
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</sect1>
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