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ffcb43bf78
We don't use FTP links, so this commit removes them. As a result, specifying links as HTTP doesn't make sense. If ENTITIES are empty, they should probably be removed.
295 lines
9.0 KiB
XML
295 lines
9.0 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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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 python3-download
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"https://www.python.org/ftp/python/&python3-version;/Python-&python3-version;.tar.xz">
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]>
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<sect1 id="python3" xreflabel="Python-&python3-version;">
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<?dbhtml filename="python3.html" ?>
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<title>Python-&python3-version;</title>
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<indexterm zone="python3">
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<primary sortas="a-Python3">Python3</primary>
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</indexterm>
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<sect2 role="package">
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<title>Introduction to Python 3</title>
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<para>
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The Python 3 package contains the
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Python development environment.
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This is useful for object-oriented programming, writing scripts,
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prototyping large programs or developing entire applications.
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</para>
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<note>
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<para>
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Python 3 was installed in LFS.
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The only reason to rebuild it here is if <xref linkend="sqlite"/> is
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installed or if upgrading.
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</para>
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</note>
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<important>
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<para>
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If upgrading to a new Python-3 minor version (for example,
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from Python-3.11.x to Python-3.12.0), you will need to reinstall
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any Python3 modules you have installed. You should also
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reinstall packages that generate Python3 modules.
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</para>
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<para>Before you upgrade, you can get a list of modules installed
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with <command>pip3 list</command>. The list may be incomplete as
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some Python modules are not installed with <command>pip3</command>,
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for example the <literal>xcbgen</literal> module installed by
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<xref role='nodep' linkend='xcb-proto'/>. Use <command>ls
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/usr/lib/python3.<replaceable>minor</replaceable>/site-packages</command>
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for a comprehensive list.
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</para>
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<para>
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The Python modules from LFS will also have to be reinstalled:
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<ulink url="&lfs-root;/chapter08/flit-core.html">flit-core</ulink>,
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<ulink url="&lfs-root;/chapter08/wheel.html">wheel</ulink>,
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<ulink url="&lfs-root;/chapter08/setuptools.html">setuptools</ulink>,
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<ulink url="&lfs-root;/chapter08/meson.html">meson</ulink>,
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<ulink url="&lfs-root;/chapter08/markupsafe.html">MarkupSafe</ulink>,
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and <ulink url="&lfs-root;/chapter08/jinja2.html">Jinja2</ulink>.
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</para>
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</important>
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<itemizedlist spacing="compact">
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<listitem>
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<para>
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Download: <ulink url="&python3-download;"/>
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</para>
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</listitem>
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</itemizedlist>
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<bridgehead renderas="sect3">Python 3 Dependencies</bridgehead>
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<bridgehead renderas="sect4">Recommended</bridgehead>
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<para role="recommended">
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<xref linkend="sqlite"/> (required if building <ulink
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url="&blfs-svn;/xsoft/firefox.html">Firefox</ulink> or <ulink
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url="&blfs-svn;/xsoft/thunderbird.html">Thunderbird</ulink>)
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</para>
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</sect2>
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<sect2 role="installation">
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<title>Installation of Python 3</title>
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<para>
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Install Python 3 by running the following
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commands:
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</para>
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<screen><userinput>CXX="/usr/bin/g++" \
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./configure --prefix=/usr \
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--enable-shared \
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--with-system-expat \
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--enable-optimizations &&
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make</userinput></screen>
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<para>
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Now, as the &root; 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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<command> CXX="/usr/bin/g++" ./configure ...</command>: Avoid an annoying
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message during configuration.
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</para>
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<para>
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<parameter>--with-system-expat</parameter>: This switch enables linking
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against the system version of Expat.
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</para>
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<!--
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<para>
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<parameter>- -with-ensurepip=yes</parameter> : This switch enables building
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the <command>pip</command> and <command>setuptools</command> packaging
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programs. <command>setuptools</command> is needed for building some
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Python modules.
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</para>
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-->
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<para>
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<parameter>--enable-optimizations</parameter>: This switch enables
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stable, but expensive, optimizations.
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</para>
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<para>
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<option>--with-lto</option>: This optional switch enables thick Link
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Time Optimization. Unusually, it creates a much larger <filename
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class="libraryfile">/usr/lib/python&python3-majorver;/config-&python3-majorver;-<arch>-linux-gnu/libpython&python3-majorver;.a</filename>
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with a small increase in the time to compile
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Python. Run-time results do not appear to show
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any benefit from doing this.
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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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<!--
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2to3 (symlink) and
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2to3-&python3-majorver;,
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-->
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<!--
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easy_install-&python3-majorver;,
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-->
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idle3 (symlink) and
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idle&python3-majorver;,
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pip3 and
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pip&python3-majorver;,
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pydoc3 (symlink) and
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pydoc&python3-majorver;,
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python3 (symlink) and
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python&python3-majorver;, and
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python3-config (symlink) and
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python&python3-majorver;-config
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</seg>
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<seg>
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libpython&python3-majorver; and libpython3
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</seg>
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<seg>
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/usr/include/python&python3-majorver; and
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/usr/lib/python&python3-majorver;
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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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<!--
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<varlistentry id="2to3">
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<term><command>2to3</command></term>
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<listitem>
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<para>
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is designed to assist in the transition between python2 and python3
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by automatically converting code to be Python3 compatible.
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</para>
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<indexterm zone="python3 2to3">
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<primary sortas="b-2to3">2to3</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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Put here for easy use when removing Python2 -->
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<!--
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<varlistentry id="easy_install">
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<term><command>easy_install</command></term>
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<listitem>
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<para>
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is a frontend to pip3 to make it easier to configure python modules
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through the PIP package manager
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</para>
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<indexterm zone="python3 easy_install">
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<primary sortas="python3 easy_install">easy_install</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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-->
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<varlistentry id="idle3">
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<term><command>idle3</command></term>
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<listitem>
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<para>
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is a wrapper script that opens a Python
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aware GUI editor. For this script to run, you must have installed
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Tk before Python so that the Tkinter
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Python module is built
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</para>
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<indexterm zone="python3 idle3">
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<primary sortas="b-idle3">idle3</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="pydoc3">
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<term><command>pydoc3</command></term>
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<listitem>
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<para>
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is the Python documentation
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tool
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</para>
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<indexterm zone="python3 pydoc3">
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<primary sortas="b-pydoc3">pydo3c</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="python3-prog">
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<term><command>python3</command></term>
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<listitem>
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<para>
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is an interpreted, interactive, object-oriented programming
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language
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</para>
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<indexterm zone="python3 python3-prog">
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<primary sortas="b-python3">python3</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="python-ver">
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<term><command>python&python3-majorver;</command></term>
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<listitem>
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<para>
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is a version-specific name for the <command>python</command>
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program
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</para>
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<indexterm zone="python3 python-ver">
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<primary sortas="b-python&python3-majorver;">python&python3-majorver;</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<!--
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<varlistentry id="pyvenv">
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<term><command>pyvenv</command></term>
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<listitem>
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<para>
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creates virtual Python environments in
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one or more target directories.
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</para>
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<indexterm zone="python3 pyvenv">
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<primary
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sortas="b-python&python3-majorver;">python&python3-majorver;</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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-->
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</variablelist>
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</sect2>
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</sect1>
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