glfs/general/genlib/glib2.xml
2024-01-23 16:29:45 -06:00

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<?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 glib2-download-http "&gnome-download-http;/glib/&glib2-minor;/glib-&glib2-version;.tar.xz">
<!ENTITY glib2-download-ftp " ">
<!ENTITY glib2-md5sum "0781e889cab64f1f7dbb6e8357c6a95f">
<!ENTITY glib2-size "5.1 MB">
<!ENTITY glib2-buildsize "130 MB (add 20 MB for tests)">
<!ENTITY glib2-time "0.8 SBU (add 0.5 SBU for tests; both using parallelism=4)">
]>
<sect1 id="glib2" xreflabel="GLib-&glib2-version;">
<?dbhtml filename="glib2.html"?>
<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 runtime functionality such as an
event loop, threads, dynamic loading and an object system.
</para>
&lfs120_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>
Optional patch:
<ulink url="&patch-root;/glib-skip_warnings-1.patch"/>
</para>
</listitem>
</itemizedlist>
<bridgehead renderas="sect3">GLib Dependencies</bridgehead>
<bridgehead renderas="sect4">Recommended</bridgehead>
<para role="recommended">
<xref linkend="libxslt"/> and
<xref linkend="pcre2"/>
</para>
<bridgehead renderas="sect4">Optional</bridgehead>
<para role="optional">
<xref linkend="dbus"/> (for some tests),
<xref linkend="fuse3"/> and
<ulink url="https://bindfs.org/">bindfs</ulink>
(both needed for one test),
<xref linkend="gdb"/> (for bindings),
<xref linkend="DocBook"/>,
<xref linkend="docbook-xsl"/>,
<xref linkend="gtk-doc"/> (to build API documentation),
<xref linkend="glib-networking"/> (for some tests, but this is a circular
dependency), and
<!--<xref linkend="sysprof"/>-->
<ulink url="&sysprof-url;">sysprof</ulink>
</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="recommended">
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.
These two utilities are also needed for some tests.
</para>
</sect2>
<sect2 role="installation">
<title>Installation of GLib</title>
<para>
If desired, apply 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,
<envar>GLIB_LOG_LEVEL</envar>, that suppresses 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 <userinput>export GLIB_LOG_LEVEL=4</userinput> will skip
output of Warning and Notice messages (and Info/Debug messages if they
are turned on). If <envar>GLIB_LOG_LEVEL</envar> is not defined, normal
message output will not be affected.
</para>
<screen><userinput>patch -Np1 -i ../glib-skip_warnings-1.patch</userinput></screen>
<warning>
<para>
If a previous version of glib is installed, move the headers out of the
way so that later packages do not encounter conflicts:
</para>
<screen role="root"><userinput remap="pre">if [ -e /usr/include/glib-2.0 ]; then
rm -rf /usr/include/glib-2.0.old &amp;&amp;
mv -vf /usr/include/glib-2.0{,.old}
fi</userinput></screen>
</warning>
<para>
Install <application>GLib</application> by running the following
commands:
</para>
<screen><userinput>mkdir build &amp;&amp;
cd build &amp;&amp;
meson setup .. \
--prefix=/usr \
--buildtype=release \
-Dman=true &amp;&amp;
ninja</userinput></screen>
<note><para>
If <xref linkend="libxslt"/> is installed, the above command may
indicate several (about 33) errors that start with "Error: no ID for
constraint linkend:" when generating the man pages. These are harmless.
</para></note>
<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>
<screen role="root"><userinput>ninja install &amp;&amp;
mkdir -p /usr/share/doc/glib-&glib2-version; &amp;&amp;
cp -r ../docs/reference/{gio,glib,gobject} /usr/share/doc/glib-&glib2-version;</userinput></screen>
<para>
You should now install <xref linkend="desktop-file-utils"/> and
<xref linkend="shared-mime-info"/> and proceed to
run the test suite.
</para>
<warning>
<para>
Do not run the test suite as &root; or some tests will fail
unexpectedly and leave some non-FHS-compliant directories in the
<filename class='directory'>/usr</filename> hierarchy.
</para>
</warning>
<para>
To test the results, after having installed the package, issue:
<command>LC_ALL=C ninja test</command> as a non-&root; user.
</para>
</sect2>
<sect2 role="commands">
<title>Command Explanations</title>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
href="../../xincludes/meson-buildtype-release.xml"/>
<para>
<parameter>-Dman=true</parameter>: This switch causes the
build to create and install the package man pages.
</para>
<para>
<option>-Dgtk_doc=true</option>: This switch causes the
build to create and install the API 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,
/usr/share/glib-2.0,
/usr/share/doc/{glib-2.0,glib-&glib2-version;}, and
/usr/share/gtk-doc/html/{gio,glib,gobject} (optional)
</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 a 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>