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 <screen><userinput remap="configure">PREFIX=/usr CC=gcc CFLAGS="-std=c99" ./configure.sh -G -O3</userinput></screen>
  81
  82     <variablelist>
  83       <title>The meaning of the configure options:</title>
  84 <!--
  85       <varlistentry>
  86         <term><parameter>- -with-readline</parameter></term>
  87         <listitem>
  88           <para>This option tells Bc to use the <filename
  89           class="libraryfile">readline</filename> library that is already
  90           installed on the system rather than using its own readline
  91           version.</para>
  92         </listitem>
  93       </varlistentry>
  94 -->
  95       <varlistentry>
  96         <term><parameter>CC=gcc CFLAGS="-std=c99"</parameter></term>
  97         <listitem>
  98           <para>These parameters specify the compiler and C standard to use.</para>
  99         </listitem>
 100       </varlistentry>
 101
 102       <varlistentry>
 103         <term><parameter>-O3</parameter></term>
 104         <listitem>
 105           <para>Specify the optimization to use.</para>
 106         </listitem>
 107       </varlistentry>
 108
 109       <varlistentry>
 110         <term><parameter>-G</parameter></term>
 111         <listitem>
 112           <para>Omit  parts of the test suite that won't work
 113           without a GNU bc present.</para>
 114         </listitem>
 115       </varlistentry>
 116     </variablelist>
 117
 118     <para>Compile the package:</para>
 119
 120 <screen><userinput remap="make">make</userinput></screen>
 121 <!--
 122     <para>To test bc, run the commands below. There is quite a bit of output,
 123     so you may want to redirect it to a file. There are a very small percentage
 124     of tests (10 of 12,144) that will indicate a round off error at the last
 125     digit.</para>
 126
 127 <screen><userinput remap="test">echo "quit" | ./bc/bc -l Test/checklib.b</userinput></screen>
 128 -->
 129
 130     <para>To test bc, run:</para>
 131
 132 <screen><userinput remap="test">make test</userinput></screen>
 133
 134
 135     <para>Install the package:</para>
 136
 137 <screen><userinput remap="install">make install</userinput></screen>
 138
 139   </sect2>
 140
 141   <sect2 id="contents-bc" role="content">
 142     <title>Contents of Bc</title>
 143
 144     <segmentedlist>
 145       <segtitle>Installed programs</segtitle>
 146
 147       <seglistitem>
 148         <seg>bc and dc</seg>
 149       </seglistitem>
 150     </segmentedlist>
 151
 152     <variablelist>
 153       <bridgehead renderas="sect3">Short Descriptions</bridgehead>
 154       <?dbfo list-presentation="list"?>
 155       <?dbhtml list-presentation="table"?>
 156
 157       <varlistentry id="bc">
 158         <term><command>bc</command></term>
 159         <listitem>
 160           <para>A command line calculator</para>
 161           <indexterm zone="ch-system-bc bc">
 162             <primary sortas="b-bc">bc</primary>
 163           </indexterm>
 164         </listitem>
 165       </varlistentry>
 166
 167       <varlistentry id="dc">
 168         <term><command>dc</command></term>
 169         <listitem>
 170           <para>A reverse-polish command line calculator</para>
 171           <indexterm zone="ch-system-bc dc">
 172             <primary sortas="b-dc">dc</primary>
 173           </indexterm>
 174         </listitem>
 175       </varlistentry>
 176
 177     </variablelist>
 178
 179   </sect2>
 180
 181 </sect1>