lfs-book/chapter06/gmp.xml

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  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../general.ent">
  %general-entities;
]>

<sect1 id="ch-system-gmp" role="wrap">
  <?dbhtml filename="gmp.html"?>

  <sect1info condition="script">
    <productname>gmp</productname>
    <productnumber>&gmp-version;</productnumber>
    <address>&gmp-url;</address>
  </sect1info>

  <title>GMP-&gmp-version;</title>

  <indexterm zone="ch-system-gmp">
    <primary sortas="a-GMP">GMP</primary>
  </indexterm>

  <sect2 role="package">
    <title/>

    <para>The GMP package contains math libraries. These have useful functions
    for arbitrary precision arithmetic.</para>

    <segmentedlist>
      <segtitle>&buildtime;</segtitle>
      <segtitle>&diskspace;</segtitle>

      <seglistitem>
        <seg>&gmp-ch6-sbu;</seg>
        <seg>&gmp-ch6-du;</seg>
      </seglistitem>
    </segmentedlist>

  </sect2>

  <sect2 role="installation">
    <title>Installation of GMP</title>

    <note>
      <para>If you have a CPU which is capable of running 64-bit code
      and you have specified <envar>CFLAGS</envar> in the environment,
      the configure script will attempt to configure for 64-bits and fail.
      Avoid this by adding <parameter>ABI=32</parameter> to the
      <envar>CFLAGS</envar> variable for the duration of the configure
      command below, then remove it afterwards.</para>
    </note>

    <para>Prepare Zlib for compilation:</para>
    <para>Prepare GMP for compilation:</para>

<screen><userinput remap="configure">./configure --prefix=/usr --enable-cxx --enable-mpbsd</userinput></screen>

    <variablelist>
      <title>The meaning of the new configure option:</title>

      <varlistentry>
        <term><parameter>--enable-cxx</parameter></term>
        <listitem>
          <para>This parameter enables C++ support</para>
        </listitem>
      </varlistentry>

    </variablelist>

    <para>Compile the package:</para>

<screen><userinput remap="make">make</userinput></screen>

    <important>
      <para>The test suite for GMP in this section is considered critical.
      Do not skip it under any circumstances.</para>
    </important>

    <para>Test the results:</para>

<screen><userinput remap="test">make check 2>&amp;1 | tee gmp-check-log</userinput></screen>

    <para>Ensure that all 139 tests in the test suite ran successfully by
    issuing the following command:</para>

<screen><userinput remap="test">awk '/tests passed/{total+=$2} ; END{print total}' gmp-check-log</userinput></screen>

    <para>Install the package:</para>

<screen><userinput remap="install">make install</userinput></screen>

    <para>If desired, install the documentation:</para>

<screen><userinput remap="install">mkdir -v /usr/share/doc/gmp-&gmp-version;
cp    -v doc/{isa_abi_headache,configuration} doc/*.html \
         /usr/share/doc/gmp-&gmp-version;</userinput></screen>

  </sect2>

  <sect2 id="contents-gmp" role="content">
    <title>Contents of GMP</title>

    <segmentedlist>
      <segtitle>Installed Libraries</segtitle>

      <seglistitem>
        <seg>libgmp.{a,so}, libgmpxx.{a,so}, and libmp.{a,so}</seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="libgmp">
        <term><command>libgmp</command></term>
        <listitem>
          <para>Contains precision math functions.</para>
          <indexterm zone="ch-system-gmp libgmp">
            <primary sortas="c-libgmp">libgmp</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libgmpxx">
        <term><command>libgmpxx</command></term>
        <listitem>
          <para>Contains C++ precision math functions.</para>
          <indexterm zone="ch-system-gmp libgmpxx">
            <primary sortas="c-libgmpxx">libgmpxx</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libmp">
        <term><command>libmp</command></term>
        <listitem>
          <para>Contains the Berkeley MP math functions.</para>
          <indexterm zone="ch-system-gmp libmp">
            <primary sortas="c-libmp">libmp</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>