lfs/chapter08/bc.xml
Xi Ruoyao e909a1ebdf
bc: enable readline
Using readline can improve line editing feature of bc, but it's not
enabled by default.

As readline is already installed before bc, let's pick up this
improvement with no cost.
2022-06-22 15:16:03 +08:00

138 lines
3.5 KiB
XML

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY % general-entities SYSTEM "../general.ent">
%general-entities;
]>
<sect1 id="ch-system-bc" role="wrap">
<?dbhtml filename="bc.html"?>
<sect1info condition="script">
<productname>bc</productname>
<productnumber>&bc-version;</productnumber>
<address>&bc-url;</address>
</sect1info>
<title>Bc-&bc-version;</title>
<indexterm zone="ch-system-bc">
<primary sortas="a-Bc">Bc</primary>
</indexterm>
<sect2 role="package">
<title/>
<para>The Bc package contains an arbitrary precision numeric processing
language.</para>
<segmentedlist>
<segtitle>&buildtime;</segtitle>
<segtitle>&diskspace;</segtitle>
<seglistitem>
<seg>&bc-fin-sbu;</seg>
<seg>&bc-fin-du;</seg>
</seglistitem>
</segmentedlist>
</sect2>
<sect2 role="installation">
<title>Installation of Bc</title>
<para>Prepare Bc for compilation:</para>
<screen><userinput remap="configure">CC=gcc ./configure --prefix=/usr -G -O3 -r</userinput></screen>
<variablelist>
<title>The meaning of the configure options:</title>
<varlistentry>
<term><parameter>CC=gcc</parameter></term>
<listitem>
<para>This parameter specifies the compiler to use.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>-G</parameter></term>
<listitem>
<para>Omit parts of the test suite that won't work
without a GNU bc present.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>-O3</parameter></term>
<listitem>
<para>Specify the optimization to use.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>-r</parameter></term>
<listitem>
<para>Enable the use of <application>Readline</application> to
improve the line editing feature of bc.</para>
</listitem>
</varlistentry>
</variablelist>
<para>Compile the package:</para>
<screen><userinput remap="make">make</userinput></screen>
<para>To test bc, run:</para>
<screen><userinput remap="test">make test</userinput></screen>
<para>Install the package:</para>
<screen><userinput remap="install">make install</userinput></screen>
</sect2>
<sect2 id="contents-bc" role="content">
<title>Contents of Bc</title>
<segmentedlist>
<segtitle>Installed programs</segtitle>
<seglistitem>
<seg>bc and dc</seg>
</seglistitem>
</segmentedlist>
<variablelist>
<bridgehead renderas="sect3">Short Descriptions</bridgehead>
<?dbfo list-presentation="list"?>
<?dbhtml list-presentation="table"?>
<varlistentry id="bc">
<term><command>bc</command></term>
<listitem>
<para>A command line calculator</para>
<indexterm zone="ch-system-bc bc">
<primary sortas="b-bc">bc</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="dc">
<term><command>dc</command></term>
<listitem>
<para>A reverse-polish command line calculator</para>
<indexterm zone="ch-system-bc dc">
<primary sortas="b-dc">dc</primary>
</indexterm>
</listitem>
</varlistentry>
</variablelist>
</sect2>
</sect1>