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<?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-ch6-sbu;</seg>
<seg>&bc-ch6-du;</seg>
</seglistitem>
</segmentedlist>
</sect2>
<sect2 role="installation">
<title>Installation of Bc</title>
<para>First, change an internal script to use <command>sed</command> instead
of <command>ed</command>:</para>
<screen><userinput remap="pre">cat > bc/fix-libmath_h << "EOF"
#! /bin/bash
sed -e '1 s/^/{"/' \
-e 's/$/",/' \
-e '2,$ s/^/"/' \
-e '$ d' \
-i libmath.h
sed -e '$ s/$/0}/' \
-i libmath.h
EOF</userinput></screen>
<para>Create temporary symbolic links so the package can find
the readline library and confirm that its required libncurses
library is available. Even though the libraries are in /tools/lib
at this point, the system will use /usr/lib at the end of
this chapter.</para>
<screen><userinput remap="pre">ln -sv /tools/lib/libncursesw.so.6 /usr/lib/libncursesw.so.6
ln -sfv libncurses.so.6 /usr/lib/libncurses.so</userinput></screen>
<para>Fix an issue in <command>configure</command> due to missing
files in the early stages of LFS:</para>
<screen><userinput remap="pre">sed -i -e '/flex/s/as_fn_error/: ;; # &/' configure</userinput></screen>
<para>Prepare Bc for compilation:</para>
<screen><userinput remap="configure">./configure --prefix=/usr \
--with-readline \
--mandir=/usr/share/man \
--infodir=/usr/share/info</userinput></screen>
<variablelist>
<title>The meaning of the configure options:</title>
<varlistentry>
<term><parameter>--with-readline</parameter></term>
<listitem>
<para>This option tells Bc to use the <filename
class="libraryfile">readline</filename> library that is already
installed on the system rather than using its own readline
version.</para>
</listitem>
</varlistentry>
</variablelist>
<para>Compile the package:</para>
<screen><userinput remap="make">make</userinput></screen>
<para>To test bc, run the commands below. There is quite a bit of output,
so you may want to redirect it to a file. There are a very small percentage
of tests (10 of 12,144) that will indicate a round off error at the last
digit.</para>
<screen><userinput remap="test">echo "quit" | ./bc/bc -l Test/checklib.b</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>is 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>is 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>
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