source: general/genlib/pth.xml@ 9d75494

<?xml version="1.0" encoding="UTF-8"?>
<!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;

  <!ENTITY pth-download-http "&gnu-http;/pth/pth-&pth-version;.tar.gz">
  <!ENTITY pth-download-ftp  " ">
  <!ENTITY pth-md5sum        "9cb4a25331a4c4db866a31cbe507c793">
  <!ENTITY pth-size          "652 KB">
  <!ENTITY pth-buildsize     "5 MB">
  <!ENTITY pth-time          "0.2 SBU">
]>

<sect1 id="pth" xreflabel="Pth-&pth-version;">
  <?dbhtml filename="pth.html"?>


  <title>Pth-&pth-version;</title>

  <indexterm zone="pth">
    <primary sortas="a-Pth">Pth</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to Pth</title>

    <para>
      The <application>Pth</application> package contains a very portable
      POSIX/ANSI-C based library for Unix platforms which provides
      non-preemptive priority-based scheduling for multiple threads of
      execution (multithreading) inside event-driven applications. All
      threads run in the same address space of the server application, but
      each thread has its own individual program-counter, run-time stack,
      signal mask and errno variable.
    </para>

    &lfs120_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&pth-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&pth-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &pth-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &pth-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &pth-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &pth-time;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Pth Dependencies</bridgehead>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="gcc"/> (for gfortran) and
      <xref linkend="libnsl"/>
    </para>

  </sect2>

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

    <caution>
      <para>
        Don't add the <option>--enable-pthread</option> parameter to the
        <command>configure</command> command below else you will overwrite the
        pthread library and interface header installed by the
        <application>Glibc</application> package in LFS.
      </para>
    </caution>

    <para>
      Install <application>Pth</application> by running the
      following commands:
    </para>

<screen><userinput>sed -i 's#$(LOBJS): Makefile#$(LOBJS): pth_p.h Makefile#' Makefile.in &amp;&amp;
./configure --prefix=/usr           \
            --disable-static        \
            --mandir=/usr/share/man &amp;&amp;
make</userinput></screen>

    <para>
      To test the results, issue: <command>make test</command>.
    </para>

    <para>
      Now, as the <systemitem class="username">root</systemitem>
      user:
    </para>

<screen role="root"><userinput>make install &amp;&amp;
install -v -m755 -d /usr/share/doc/pth-&pth-version; &amp;&amp;
install -v -m644    README PORTING SUPPORT TESTS \
                    /usr/share/doc/pth-&pth-version;</userinput></screen>
  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para>
      <command>sed -i 's#$(LOBJS) ...</command>: This <command>sed</command>
      fixes a race condition in the <filename>Makefile</filename>. It allows
      running <command>make</command> with multiple jobs (e.g., <command>make
      -j4</command>).
      <!-- how ironic that a package for using multiple threads has this bug in
      its Makefile -->
    </para>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
      href="../../xincludes/static-libraries.xml"/>

    <para>
      <parameter>--mandir=/usr/share/man</parameter>: This switch puts the
      man pages in <filename class="directory">/usr/share/man</filename> instead
      of <filename class="directory">/usr/man</filename>.
    </para>
  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Program</segtitle>
      <segtitle>Installed Library</segtitle>
      <segtitle>Installed Directory</segtitle>

      <seglistitem>
        <seg>pth-config</seg>
        <seg>libpth.so</seg>
        <seg>/usr/share/doc/pth-&pth-version;</seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="pth-config">
        <term><command>pth-config</command></term>
        <listitem>
          <para>
            is a utility used to configure and build applications based on
            the pth(3) library. It can be used to query the C compiler and
            linker flags which are required to correctly compile and link the
            application against the pth(3) library
          </para>
          <indexterm zone="pth pth-config">
            <primary sortas="b-pth-config">pth-config</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libpth">
        <term><filename class="libraryfile">libpth.so</filename></term>
        <listitem>
          <para>
            contains the API functions used by the GNU Portable Threads
            Library
          </para>
          <indexterm zone="pth libpth">
            <primary sortas="c-libpth">libpth.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>
    </variablelist>
  </sect2>

</sect1>