chapter06/bc.xml

   1 <?xml version="1.0" encoding="ISO-8859-1"?>
   2 <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   3   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
   4   <!ENTITY % general-entities SYSTEM "../general.ent">
   5   %general-entities;
   6 ]>
   7
   8 <sect1 id="ch-system-bc" role="wrap">
   9   <?dbhtml filename="bc.html"?>
  10
  11   <sect1info condition="script">
  12     <productname>bc</productname>
  13     <productnumber>&bc-version;</productnumber>
  14     <address>&bc-url;</address>
  15   </sect1info>
  16
  17   <title>Bc-&bc-version;</title>
  18
  19   <indexterm zone="ch-system-bc">
  20     <primary sortas="a-Bc">Bc</primary>
  21   </indexterm>
  22
  23   <sect2 role="package">
  24     <title/>
  25
  26     <para>The Bc package contains an arbitrary precision numeric processing
  27     language.</para>
  28
  29     <segmentedlist>
  30       <segtitle>&buildtime;</segtitle>
  31       <segtitle>&diskspace;</segtitle>
  32
  33       <seglistitem>
  34         <seg>&bc-ch6-sbu;</seg>
  35         <seg>&bc-ch6-du;</seg>
  36       </seglistitem>
  37     </segmentedlist>
  38
  39   </sect2>
  40
  41   <sect2 role="installation">
  42     <title>Installation of Bc</title>
  43
  44     <para>First, change an internal script to use <command>sed</command> instead
  45     of <command>ed</command>:</para>
  46
  47 <screen><userinput remap="pre">cat &gt; bc/fix-libmath_h &lt;&lt; "EOF"
  48 #! /bin/bash
  49 sed -e '1   s/^/{"/' \
  50     -e     's/$/",/' \
  51     -e '2,$ s/^/"/'  \
  52     -e   '$ d'       \
  53     -i libmath.h
  54
  55 sed -e '$ s/$/0}/' \
  56     -i libmath.h
  57 EOF</userinput></screen>
  58
  59     <para>Create temporary symbolic links so the package can find
  60     the readline library and confirm that its required libncurses
  61     library is available. Even though the libraries are in /tools/lib
  62     at this point, the system will use /usr/lib at the end of
  63     this chapter.</para>
  64
  65 <screen><userinput remap="pre">ln -sv /tools/lib/libncursesw.so.6 /usr/lib/libncursesw.so.6
  66 ln -sfv libncursesw.so.6 /usr/lib/libncurses.so</userinput></screen>
  67
  68     <para>Fix an issue in <command>configure</command> due to missing
  69     files in the early stages of LFS:</para>
  70
  71 <screen><userinput remap="pre">sed -i -e '/flex/s/as_fn_error/: ;; # &amp;/' configure</userinput></screen>
  72
  73     <para>Prepare Bc for compilation:</para>
  74
  75 <screen><userinput remap="configure">./configure --prefix=/usr           \
  76             --with-readline         \
  77             --mandir=/usr/share/man \
  78             --infodir=/usr/share/info</userinput></screen>
  79
  80     <variablelist>
  81       <title>The meaning of the configure options:</title>
  82
  83       <varlistentry>
  84         <term><parameter>--with-readline</parameter></term>
  85         <listitem>
  86           <para>This option tells Bc to use the <filename
  87           class="libraryfile">readline</filename> library that is already
  88           installed on the system rather than using its own readline
  89           version.</para>
  90         </listitem>
  91       </varlistentry>
  92
  93     </variablelist>
  94
  95     <para>Compile the package:</para>
  96
  97 <screen><userinput remap="make">make</userinput></screen>
  98
  99     <para>To test bc, run the commands below. There is quite a bit of output,
 100     so you may want to redirect it to a file. There are a very small percentage
 101     of tests (10 of 12,144) that will indicate a round off error at the last
 102     digit.</para>
 103
 104 <screen><userinput remap="test">echo "quit" | ./bc/bc -l Test/checklib.b</userinput></screen>
 105
 106     <para>Install the package:</para>
 107
 108 <screen><userinput remap="install">make install</userinput></screen>
 109
 110   </sect2>
 111
 112   <sect2 id="contents-bc" role="content">
 113     <title>Contents of Bc</title>
 114
 115     <segmentedlist>
 116       <segtitle>Installed programs</segtitle>
 117
 118       <seglistitem>
 119         <seg>bc and dc</seg>
 120       </seglistitem>
 121     </segmentedlist>
 122
 123     <variablelist>
 124       <bridgehead renderas="sect3">Short Descriptions</bridgehead>
 125       <?dbfo list-presentation="list"?>
 126       <?dbhtml list-presentation="table"?>
 127
 128       <varlistentry id="bc">
 129         <term><command>bc</command></term>
 130         <listitem>
 131           <para>A command line calculator</para>
 132           <indexterm zone="ch-system-bc bc">
 133             <primary sortas="b-bc">bc</primary>
 134           </indexterm>
 135         </listitem>
 136       </varlistentry>
 137
 138       <varlistentry id="dc">
 139         <term><command>dc</command></term>
 140         <listitem>
 141           <para>A reverse-polish command line calculator</para>
 142           <indexterm zone="ch-system-bc dc">
 143             <primary sortas="b-dc">dc</primary>
 144           </indexterm>
 145         </listitem>
 146       </varlistentry>
 147
 148     </variablelist>
 149
 150   </sect2>
 151
 152 </sect1>