source: general/genlib/glib2.xml@ 7333fc0

<?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;

  <!ENTITY glib2-download-http "&gnome-download-http;/glib/2.56/glib-&glib2-version;.tar.xz">
  <!ENTITY glib2-download-ftp  "&gnome-download-ftp;/glib/2.56/glib-&glib2-version;.tar.xz">
  <!ENTITY glib2-md5sum        "f2b59392f2fb514bbe7791dda0c36da5">
  <!ENTITY glib2-size          "7.7 MB">
  <!ENTITY glib2-buildsize     "149 MB (add 1 MB for tests)">
  <!ENTITY glib2-time          "0.3 SBU (add 0.4 SBU for tests; both using  parallelism=4)">
]>

<sect1 id="glib2" xreflabel="GLib-&glib2-version;">
  <?dbhtml filename="glib2.html"?>

  <sect1info>
    <othername>$LastChangedBy$</othername>
    <date>$Date$</date>
  </sect1info>

  <title>GLib-&glib2-version;</title>

  <indexterm zone="glib2">
    <primary sortas="a-GLib2">GLib2</primary>
  </indexterm>

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

    <para>
      The <application>GLib</application> package contains low-level
      libraries useful for providing data structure handling for C, portability
      wrappers and interfaces for such runtime functionality as an
      event loop, threads, dynamic loading and an object system.
    </para>

    &lfs82_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&glib2-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&glib2-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &glib2-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &glib2-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &glib2-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &glib2-time;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Additional Downloads</bridgehead>
    <itemizedlist spacing="compact">
      <!--<listitem>
        <para>
          Required patch:
          <ulink url="&patch-root;/glib-&glib2-version;-meson_fixes-1.patch"/>
        </para>
      </listitem>-->
      <listitem>
        <para>
          Optional patch:
          <ulink url="&patch-root;/glib-&glib2-version;-skip_warnings-1.patch"/>
        </para>
      </listitem>
    </itemizedlist>

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

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="pcre"/> (built with Unicode properties)
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="dbus"/> (required for some tests),
<!--      <xref linkend="elfutils"/> and -->
        <xref linkend="DocBook"/>,
        <xref linkend="docbook-xsl"/>, and
        <xref linkend="libxslt"/> (to build manual pages)

      <!-- <xref linkend="gtk-doc"/> cound not find a reference to this 
      in the meson build -->
    </para>

    <bridgehead renderas="sect4">Additional Runtime Dependencies</bridgehead>
    <para role="recommended">
      <xref role="runtime" linkend="gobject-introspection"/>
      (should be installed before gtk+, atk, etc.)
    </para>
    <para role="optional">
      Quoted directly from the <filename>INSTALL</filename> file:
      <quote>Some of the mimetype-related functionality in GIO requires the
      <command>update-mime-database</command> and
      <command>update-desktop-database</command> utilities</quote>,
      which are part of
      <xref role="runtime" linkend="shared-mime-info"/> and
      <xref role="runtime" linkend="desktop-file-utils"/>, respectively.
    </para>

    <para condition="html" role="usernotes">User Notes:
      <ulink url="&blfs-wiki;/glib2"/>
    </para>
  </sect2>

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

    <para>If desired, appy the optional patch. In many cases, applications that
    use this library, either  directly or indirectly via other libraries such
    as <xref linkend="gtk3"/>, output numerous warnings when run from the
    command line.  This patch enables the use of an environment variable,
    GLIB_LOG_LEVEL, that supresses unwanted messages. The value of the
    variable is a digit that corresponds to:</para>

    <simplelist>
      <member>1  Alert</member>
      <member>2  Critical</member>
      <member>3  Error</member>
      <member>4  Warning</member>
      <member>5  Notice</member>
    </simplelist>

    <para>For instance GLIB_LOG_LEVEL=4 will skip output of Warning and 
    Notice messages (and Info/Debug messages if they are turned on).
    If GLIB_LOG_LEVEL is not defined, normal message output will not
    be affected.</para>

<screen><userinput>patch -Np1 -i ../glib-&glib2-version;-skip_warnings-1.patch</userinput></screen>

    <warning>
      <para>
        If upgrading from a previous version of GLib that was built using
        autotools, and the <application>libtool</application> archives were
        installed, you will need to adjust all installed libtool archives to
        replace references to the libtool archives for this package,
        <filename>/usr/lib/libg{io,lib,module,object,thread}-2.0.la</filename>,
        with the appropriate linker library flag (-l),
        <command>-lg{io,lib,module,object,thread}</command>. 600+ files must
        be modified on a complete gnome desktop.
<!--        Issue the following commands as the
        <systemitem class="username">root</systemitem> user: -->
      </para>

<!-- Sorry, I broke my system berore I was able to fully test these commands
     Feel free to test and uncomment if sane (I believe they are, but will
     not introduce to end-users until it is tested thoroughly). - DJ

<screen>if test -f /usr/lib/libglib-2.0.la; then
    mkdir /usr/lib/la-file-backup &amp;&amp;
    for lafile in /usr/lib/libg{io,lib,module,object,thread}-2.0.la; do
        mv "${lafile}" /usr/lib/la-file-backup/$(basename "${lafile}").bak
    done &amp;&amp;
    for file in `find /usr/lib -name "*.la"`; do
        grep -q '/usr/lib/libg\(io\|module\|lib\|object\|thread\)-2.0.la' \
             "${file}" &amp;&amp;
        sed -e 's@/usr/lib/libg\(io\|module\|lib\|object\|thread\)-2.0.la@-lg\1@g' \
            -i.bak "${file}" &amp;&amp;
        mv -v "${file}.bak" /usr/lib/la-file-backup
    done
fi</screen>-->
    </warning>

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

<screen><userinput>mkdir build-glib &amp;&amp;
cd    build-glib &amp;&amp;

meson --prefix=/usr      \
      -Dwith-pcre=system \
      -Dwith-docs=no     \
      -Dselinux=false    \
      ..                 &amp;&amp;
ninja</userinput></screen>

    <para>
      The <application>GLib</application> test suite requires
      <application>desktop-file-utils</application> for some tests. However,
      <application>desktop-file-utils</application> requires
      <application>GLib</application> in order to compile; therefore, you must
      first install <application>GLib</application> and then run the test
      suite.
    </para>

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

    <note><para>
      If <xref linkend="libxslt"/> is installed, the following command may
      indicate several (about 33) errors that start with "Error: no ID for
      constraint linkend:" when installing the man pages.  These are harmless.
    </para></note>

<screen role="root"><userinput>ninja install &amp;&amp;

chmod -v 755 /usr/bin/{gdbus-codegen,glib-gettextize} &amp;&amp;

mkdir -p /usr/share/doc/glib-&glib2-version; &amp;&amp;
cp -r ../docs/reference/{NEWS,gio,glib,gobject} /usr/share/doc/glib-&glib2-version;</userinput></screen>

    <para>
      You should now install <xref linkend="desktop-file-utils"/> and proceed to
      run the test suite.
    </para>

    <para>
      To test the results, after having installed the package, issue:
      <command>ninja test</command>.  When run in a graphical environment, 
      one test, appinfo, fails if <xref linkend='gnome-terminal'/> is not 
      installed.
    </para>

  </sect2>

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

    <para>
      <command>sed ... meson.build</command>: Fix the version of
      the package to be consistent with other version numbers embedded
      in the code.
    </para>

    <para>
      <parameter>-Dwith-pcre=system</parameter>: This switch causes the
      build to use a system-provided version of the
      <application>PCRE</application> library instead of an internal
      version.
    </para>

    <para>
      <parameter>-Dwith-docs=no</parameter>: This switch prevents
      rebuilding the package documentation.
    </para>

  </sect2>

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

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Libraries</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
          gapplication,           gdbus, gdbus-codegen, 
          gio,                    gio-querymodules,
          glib-compile-resources, glib-compile-schemas,
          glib-genmarshal,        glib-gettextize, 
          glib-mkenums,           gobject-query, 
          gresource,              gsettings, 
          gtester, and            gtester-report
        </seg>
        <seg>
          libgio-2.0.so, 
          libglib-2.0.so, 
          libgmodule-2.0.so,
          libgobject-2.0.so, and 
          libgthread-2.0.so
        </seg>
        <seg>
          /usr/include/gio-unix-2.0,
          /usr/include/glib-2.0,
          /usr/lib/gio, 
          /usr/lib/glib-2.0, and 
          /usr/share/glib-2.0
        </seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="gapplication">
        <term><command>gapplication</command></term>
        <listitem>
          <para>
            can be used to start applications and to send
            messages to already-running instances of other applications.
          </para>
          <indexterm zone="glib2 gapplication">
            <primary sortas="b-gapplication">application</primary>
          </indexterm>
        </listitem>
      </varlistentry>
      <varlistentry id="gdbus">
        <term><command>gdbus</command></term>
        <listitem>
          <para>
            is a simple tool used for working with
            <application>D-Bus</application> objects.
          </para>
          <indexterm zone="glib2 gdbus">
            <primary sortas="b-gdbus">gdbus</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gdbus-codegen">
        <term><command>gdbus-codegen</command></term>
        <listitem>
          <para>
            is used to generate code and/or documentation for one or
            more <application>D-Bus</application> interfaces.
          </para>
          <indexterm zone="glib2 gdbus-codegen">
            <primary sortas="b-gdbus-codegen">gdbus-codegen</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gio">
        <term><command>gio</command></term>
        <listitem>
          <para>
            is a utility that makes many <application>GIO</application>
            features available from the command line.
          </para>
          <indexterm zone="glib2 gio">
            <primary sortas="b-gio">gio</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gio-querymodules">
        <term><command>gio-querymodules</command></term>
        <listitem>
          <para>
            is used to create a <filename>giomodule.cache</filename> file in 
            the listed directories. This file lists the implemented extension 
            points for each module that has been found.
          </para>
          <indexterm zone="glib2 gio-querymodules">
            <primary sortas="b-gio-querymodules">gio-querymodules</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="glib-compile-resources">
        <term><command>glib-compile-resources</command></term>
        <listitem>
          <para>
            is used to read the resource description from a file and
            the files that it references to create a binary resource
            bundle that is suitable for use with the GResource API.
          </para>
          <indexterm zone="glib2 glib-compile-resources">
            <primary sortas="b-glib-compile-resources">glib-compile-resources</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="glib-compile-schemas">
        <term><command>glib-compile-schemas</command></term>
        <listitem>
          <para>
            is used to compile all the GSettings XML schema files
            in directory into a binary file with the name 
            <filename>gschemas.compiled</filename> that can be used by GSettings.
          </para>
          <indexterm zone="glib2 glib-compile-schemas">
            <primary sortas="b-glib-compile-resources">glib-compile-schemas</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="glib-genmarshal">
        <term><command>glib-genmarshal</command></term>
        <listitem>
          <para>
            is a C code marshaller generation utility for GLib closures.
          </para>
          <indexterm zone="glib2 glib-genmarshal">
            <primary sortas="b-glib-genmarshal">glib-genmarshal</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="glib-gettextize">
        <term><command>glib-gettextize</command></term>
        <listitem>
          <para>
            is a variant of the <application>gettext</application>
            internationalization utility.
          </para>
          <indexterm zone="glib2 glib-gettextize">
            <primary sortas="b-glib-gettextize">glib-gettextize</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="glib-mkenums">
        <term><command>glib-mkenums</command></term>
        <listitem>
          <para>
            is a C language enum description generation utility.
          </para>
          <indexterm zone="glib2 glib-mkenums">
            <primary sortas="b-glib-mkenums">glib-mkenums</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gobject-query">
        <term><command>gobject-query</command></term>
        <listitem>
          <para>
            is a small utility that draws a tree of types.
          </para>
          <indexterm zone="glib2 gobject-query">
            <primary sortas="b-gobject-query">gobject-query</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gresource">
        <term><command>gresource</command></term>
        <listitem>
          <para>
            offers a simple command line interface to GResource.
          </para>
          <indexterm zone="glib2 gresource">
            <primary sortas="b-gresource">gresource</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gsettings">
        <term><command>gsettings</command></term>
        <listitem>
          <para>
            offers a simple command line interface to GSettings.
          </para>
          <indexterm zone="glib2 gsettings">
            <primary sortas="b-gsettings">gsettings</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gtester">
        <term><command>gtester</command></term>
        <listitem>
          <para>
            is a test running utility.
          </para>
          <indexterm zone="glib2 gtester">
            <primary sortas="b-gtester">gtester</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gtester-report">
        <term><command>gtester-report</command></term>
        <listitem>
          <para>
            is a test report formatting utility.
          </para>
          <indexterm zone="glib2 gtester-report">
            <primary sortas="b-gtester-report">gtester-report</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="GLib-libraries">
        <term>GLib libraries</term>
          <listitem>
          <para>
            contain low-level core libraries for the
            <application>GIMP</application> Toolkit.
          </para>
          <indexterm zone="glib2 GLib-libraries">
            <primary sortas="c-GLib-libraries">Glib libraries</primary>
          </indexterm>
          </listitem>
        </varlistentry>

    </variablelist>

  </sect2>

</sect1>