source: x/lib/qt.xml@ 8b82ddf

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
   "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY qt-download-http "http://sunsite.rediris.es/mirror/Qt/source/qt-x11-free-&qt-version;.tar.bz2">
  <!ENTITY qt-download-ftp  "ftp://ftp.trolltech.com/qt/source/qt-x11-free-&qt-version;.tar.bz2">
  <!ENTITY qt-md5sum        "027f4e82fbe592b39d2f160bfb3a73af">
  <!ENTITY qt-size          "13.8 MB">
  <!ENTITY qt-buildsize     "250 MB">
  <!ENTITY qt-time          "15.5 SBU (full), 10.9 SBU (sub-tools)">
]>

<sect1 id="qt" xreflabel="Qt-&qt-version;">
<sect1info>
  <othername>$LastChangedBy$</othername>
  <date>$Date$</date>
</sect1info>

<?dbhtml filename="qt.html" ?>
<title>Qt-&qt-version;</title>

<indexterm zone="qt">
  <primary sortas="a-qt">Qt</primary>
</indexterm>

<sect2>
<title>Introduction to <application>Qt</application></title>

<para>The <application>Qt</application> package contains a
<application>C++</application> <acronym>GUI</acronym> library. This is useful 
for creating graphical applications or executing graphical applications that
are dynamically linked to the <application>Qt</application> library. One of the
major users of <application>Qt</application> is <application>KDE</application>.
</para>

<sect3><title>Package information</title>
<itemizedlist spacing='compact'>
  <listitem><para>Download (HTTP): <ulink url="&qt-download-http;"/></para></listitem>
  <listitem><para>Download (FTP): <ulink url="&qt-download-ftp;"/></para></listitem>
  <listitem><para>Download MD5 Sum: &qt-md5sum;</para></listitem>
  <listitem><para>Download size: &qt-size;</para></listitem>
  <listitem><para>Estimated disk space required: &qt-buildsize;</para></listitem>
  <listitem><para>Estimated build time: &qt-time;</para></listitem></itemizedlist>
</sect3>

<sect3>
<title><application>Qt</application> dependencies</title>

<sect4>
<title>Required</title>
<para><xref linkend="x-installing"/></para>
</sect4>

<sect4>
<title>Recommended</title>
<para><xref linkend="libjpeg"/> and <xref linkend="libmng"/></para>
</sect4>

<sect4>
<title>Optional</title>
<para><xref linkend="nas"/>, <xref linkend="cups"/>, <xref linkend="mysql"/>,
<xref linkend="postgresql"/>, <ulink url="http://sqlite.org/">SQLite</ulink>, 
<ulink url="http://firebird.sourceforge.net/">Firebird</ulink> 
and <ulink url="http://www.unixodbc.org/">unixODBC</ulink></para>
</sect4>
</sect3>
</sect2>

<sect2>
<title>Installation of <application>Qt</application></title>

<para>There are several ways to install a complicated package such as 
<application>Qt</application>. The files are not completely position 
independent. Installation procedures execute the program 
<command>pkg-config</command> to determine the location of package executables, 
libraries, headers, and other files. For <application>Qt</application>, 
<command>pkg-config</command> will look for the file 
<filename>lib/pkgconfig/qt-mt.pc</filename> which must be modified if 
relocating the package. This file is set up correctly by the build process.
</para>

<para>The default installation places the files in 
<filename class='directory'>/usr/local/qt/</filename>. Many commercial 
distributions place the files in the system's 
<filename class='directory'>/usr</filename> hierarchy. The package can also be 
installed in an arbitrary directory.</para>

<para>This section will demonstrate two different methods.</para>

<note><para>The build time for <application>Qt</application> is quite long. If 
you want to save some time and don't want the tutorials and examples, change 
the first make line to:</para>

<para><userinput><command>make sub-tools</command></userinput></para>
</note>

<sect3>
<title>Method 1 - Installing in the 
<filename class='directory'>/usr</filename> hierarchy</title>
 
<para>The advantage of this method is that no updates to the 
<filename>/etc/ld.so.conf</filename> or <filename>/etc/man.conf</filename> 
files are required. The package files are distributed within several 
subdirectories of the <filename class='directory'>/usr</filename> hierarchy. 
This is the method that most commercial distributions use.</para>

<note><para>If Qt is being reinstalled, run the following commands from
a console or non-Qt based window manager.  It overwrites Qt libraries 
that should not be in use during the install process.</para></note>

<screen><userinput><command>sed -i -e 's:$(QTDIR)/include:&amp;/qt:' \
       -e 's:$(QTDIR)/lib:&amp;/qt:' \
       mkspecs/linux*/qmake.conf   &amp;&amp;    
bash
export PATH=$PWD/bin:$PATH &amp;&amp;
export LD_LIBRARY_PATH=$PWD/lib:$LD_LIBRARY_PATH &amp;&amp;
./configure -prefix /usr -docdir /usr/share/doc/qt \
    -headerdir /usr/include/qt -plugindir /usr/lib/qt/plugins \
    -datadir /usr/share/qt -translationdir /usr/share/qt/translations \
    -sysconfdir /etc/qt -qt-gif -system-zlib -system-libmng \
    -no-exceptions -thread -plugin-imgfmt-png \
    -system-libjpeg -system-libpng &amp;&amp;
find -type f -name Makefile | xargs sed -i "s@-Wl,-rpath,/usr/lib@@g" &amp;&amp;
make</command></userinput></screen>

<para>Now, as the root user:</para>

<screen><userinput role='root'><command>make install &amp;&amp;
ln -sf libqt-mt.so /usr/lib/libqt.so &amp;&amp;
cp -r doc/man /usr/share &amp;&amp;
cp -r examples /usr/share/doc/qt</command></userinput></screen>

<para>And finally back as the regular user:</para>
<screen><userinput><command>exit</command></userinput></screen>

</sect3>

<sect3>
<title>Method 2 - Installing in  <filename class='directory'>/opt</filename></title>

<para>This is the method recommended by the <application>Qt</application> 
developers. It has the advantage of keeping all the package files consolidated 
in a dedicated directory hierarchy. By using this method, an update can be made 
without overwriting a previous installation and users can easily revert to a 
previous version by changing one symbolic link.</para>

<para>The <application>Qt</application> developers use a default location of 
<filename class='directory'>/usr/local/qt/</filename>, however this procedure 
puts the files in <filename class='directory'>/opt/qt-&qt-version;/</filename> 
and then creates a symbolic link to <filename>/opt/qt/</filename>.</para>

<screen><userinput><command>bash
export QTDIR=$PWD &amp;&amp;
export LD_LIBRARY_PATH=$PWD/lib:$LD_LIBRARY_PATH &amp;&amp;
export PATH=$PWD/bin:$PATH &amp;&amp;
./configure -prefix /opt/qt-&qt-version; -qt-gif -system-libpng \
    -system-libmng -system-zlib -system-libjpeg -no-exceptions \
    -thread -plugin-imgfmt-png &amp;&amp;
make</command></userinput></screen>

<para>Now, as the root user:</para>

<screen><userinput role='root'><command>make install &amp;&amp;
ln -sfn qt-&qt-version; /opt/qt &amp;&amp;
ln -s libqt-mt.so /opt/qt/lib/libqt.so &amp;&amp;
cp -r doc/man /opt/qt/doc &amp;&amp;
cp -r examples /opt/qt/doc</command></userinput></screen>

<para>And finally back as the regular user:</para>
<screen><userinput><command>exit</command></userinput></screen>

<note><para>If you pass the 
<option>-plugin-sql-<replaceable>[driver]</replaceable></option> switch to the 
<command>configure</command> command, you must also pass 
<option>-I<replaceable>[/path/to/sql/headers]</replaceable></option> so 
<command>make</command> can find the appropriate header files.</para></note>
</sect3>

</sect2>

<sect2>
<title>Command explanations</title>

<para><command>sed -i -e 's:$(QTDIR)/include:&amp;/qt:' 
       -e 's:$(QTDIR)/lib:&amp;/qt:' 
       mkspecs/linux*/qmake.conf</command>: 
Directories in qmake.conf need to be adjusted to match
the BLFS Method 1 installation directories.</para>

<para><command>bash</command>: This command enters a sub-shell to isolate 
environment changes.</para>

<para><command>export QTDIR=$PWD</command>: This command defines where the root 
of the <application>Qt</application> directory is located.</para>

<para><command>export LD_LIBRARY_PATH=$PWD/lib:$LD_LIBRARY_PATH</command>: This 
command allows the not yet installed <application>Qt</application> libraries to 
be used by the not yet installed <application>Qt</application> programs.</para>

<para><command>export PATH=$PWD/bin:$PATH</command>: This command 
allows the build process to find supporting executables.</para>

<para><parameter>-qt-gif</parameter>: This switch adds support for 
<filename>gif</filename> files to the libraries.</para>

<para><parameter>-system-zlib -system-libpng</parameter>: This switch
forces the build instructions to use the shared libraries that are on your 
system instead of creating a custom set of support libraries for these
functions.</para>

<para><parameter>-plugin-imgfmt-png</parameter>: This switch enables 
<application>libpng</application> to be linked to at runtime.</para>

<para><parameter>-no-exceptions</parameter>: This switch disables
the exceptions coding generated by the <application>C++</application> compiler.
</para>

<para><parameter>-thread</parameter>: This switch adds
support for multi-threading.</para>

<para><command>find -type f -name Makefile | xargs sed -i
"s@-Wl,-rpath,/usr/lib@@g"</command>: This command removes hardcoded run-time
paths. Otherwise, <command>uic</command> always tries to run with 
<application>Qt</application> libraries in <filename>/usr/lib</filename>.</para>

<para><command>ln -s libqt-mt.so /usr/lib/libqt.so</command>: This command 
allows <command>configure</command> scripts to find a working 
<application>Qt</application> installation.</para>

<para><command>cp -r doc/man /usr/share (or /opt/qt/doc)</command>: This command
installs the man pages which are missed by <command>make install</command>.
</para>

<para><command>cp -r examples /usr/share/doc/qt (or /opt/qt/doc)</command>: 
This command installs the examples which are missed by 
<command>make install</command>.</para>

<para><command>exit</command>: This command returns to the parent shell
and eliminates environment variables set earlier.</para>

</sect2>

<sect2>
<title>Configuring <application>Qt</application></title>

<sect3 id='qt-config'>
<title>Configuration Information</title>

<para>The <envar>QTDIR</envar> environment variable needs to be set when
building packages that depend on <application>Qt</application>. Add the
following to the <filename>.bash_profile</filename> initialization script for
each user that builds packages using the <application>Qt</application>
libraries. Alternatively, the variable can be set in the system wide
<filename>/etc/profile</filename> file.</para>

<para>For Method 1:</para>
<screen><userinput>export QTDIR=/usr</userinput></screen>

<para>or for Method 2:</para>
<screen><userinput>export QTDIR=/opt/qt</userinput></screen>

<para>If you installed <application>Qt</application> using Method 2, you also
need to update the following configuration files so that
<application>Qt</application> is correctly found by other packages and system
processes.</para>

<para>Update the <filename>/etc/ld.so.conf</filename> and
<filename>/etc/man.conf</filename> files:</para>

<screen><userinput><command>cat &gt;&gt; /etc/ld.so.conf &lt;&lt; "EOF"
# Begin qt addition to /etc/ld.so.conf

/opt/qt/lib

# End qt addition
EOF
ldconfig

cat &gt;&gt; /etc/man.conf &lt;&lt; "EOF"
# Begin qt addition to man.conf

MANPATH /opt/qt/doc/man

# End qt addition to man.conf
EOF</command></userinput></screen>

<indexterm zone="qt qt-config">
  <primary sortas="e-etc-ld.so.conf">/etc/ld.so.conf</primary>
</indexterm>

<indexterm zone="qt qt-config">
  <primary sortas="e-etc-man.conf">/etc/man.conf</primary>
</indexterm>

<indexterm zone="qt qt-config">
  <primary sortas="e-etc-profile">/etc/profile</primary>
</indexterm>

<indexterm zone="qt qt-config">
  <primary sortas="e-AA.bash_profile">~/.bash_profile</primary>
</indexterm>
       

<para>Update the <envar>PKG_CONFIG_PATH</envar> environment variable in your
<filename>~/.bash_profile</filename> or <filename>/etc/profile</filename> with
the following:</para>

<screen><userinput>PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/opt/qt/lib/pkgconfig</userinput></screen>

<para>If you want the <application>Qt</application> executables in your shell
search path, update the <envar>PATH</envar> environment variable in your
<filename>~/.bash_profile</filename> or <filename>/etc/profile</filename> to
include <filename class='directory'>/opt/qt/bin</filename>.</para>

<para>As with most libraries, there is no explicit configuration to do. After
updating <filename>/etc/ld.so.conf</filename> as explained above, run
<command>/sbin/ldconfig</command> so that <command>ldd</command> can find the
shared libraries.</para>

</sect3>

</sect2>

<sect2>
<title>Contents</title>

<para>The <application>Qt</application>/<application>X11</application>
library contains <acronym>API</acronym>s necessary to build and use
programs based on the <application>Qt</application> <acronym>GUI</acronym> 
toolkit.</para>

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

  <seglistitem>
    <seg>assistant, designer, linguist, lrelease, lupdate, moc,
         qm2ts, qmake, qtconfig, and uic</seg>
    <seg>libqt-mt.so, libqt.so libqui.so, libdesignercore.a,
         libeditor.a, and libqassistantclient.a</seg>
    <seg>/opt/qt-&qt-version; or /usr/lib/qt, /usr/share/qt,
         /usr/share/doc/qt, /usr/include/qt, and /etc/qt</seg>
  </seglistitem>
</segmentedlist>

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

<varlistentry id="assistant">
  <term><command>assistant</command></term>
  <listitem>
    <para>is a tool for presenting on-line documentation.</para>
    <indexterm zone="qt assistant">
      <primary sortas="b-assistant">assistant</primary>
    </indexterm>
  </listitem>
</varlistentry>

<varlistentry id="designer">
  <term><command>designer</command></term>
  <listitem>
    <para>is a full-fledged GUI builder. It includes 
    powerful features such as preview mode, automatic widget 
    layout, support for custom widgets, and an advanced 
    property editor.</para>
    <indexterm zone="qt designer">
      <primary sortas="b-designer">designer</primary>
    </indexterm>
  </listitem>
</varlistentry>

<varlistentry id="linguist">
  <term><command>linguist</command></term>
  <listitem>
    <para>provides support for translating applications into 
    local languages. </para>
    <indexterm zone="qt linguist">
      <primary sortas="b-linguist">linguist</primary>
    </indexterm>
  </listitem>
</varlistentry>

<varlistentry id="lrelease">
  <term><command>lrelease</command></term>
  <listitem>
    <para>is a simple command line tool. It reads a Qt project 
    file and produces message files used by the application.</para>
    <indexterm zone="qt lrelease">
      <primary sortas="b-lrelease">lrelease</primary>
    </indexterm>
  </listitem>
</varlistentry>

<varlistentry id="lupdate">
  <term><command>lupdate</command></term>
  <listitem>
    <para>reads a Qt project file, finds the translatable 
    strings in the specified source, header and Qt Designer 
    interface files, and produces or updates the translation 
    files listed in the project file.</para>
    <indexterm zone="qt lupdate">
      <primary sortas="b-lupdate">lupdate</primary>
    </indexterm>
  </listitem>
</varlistentry>

<varlistentry id="moc">
  <term><command>moc</command></term>
  <listitem>
    <para>generates Qt meta object support code.</para>
    <indexterm zone="qt moc">
      <primary sortas="b-moc">moc</primary>
    </indexterm>
  </listitem>
</varlistentry>

<varlistentry id="qm2ts">
  <term><command>qm2ts</command></term>
  <listitem>
    <para>is a tool for converting Qt message file formats.</para>
    <indexterm zone="qt qm2ts">
      <primary sortas="b-qm2ts">qm2ts</primary>
    </indexterm>
  </listitem>
</varlistentry>

<varlistentry id="qmake">
  <term><command>qmake</command></term>
  <listitem>
    <para>qmake uses information stored in project files to 
    determine what should go in the makefiles it generates.</para>
    <indexterm zone="qt qmake">
      <primary sortas="b-qmake">qmake</primary>
    </indexterm>
  </listitem>
</varlistentry>

<varlistentry id="qtconfig">
  <term><command>qtconfig</command></term>
  <listitem>
    <para>is used to customize the appearance of Qt applications.</para>
    <indexterm zone="qt qtconfig">
      <primary sortas="b-qtconfig">qtconfig</primary>
    </indexterm>
  </listitem>
</varlistentry>

<varlistentry id="uic">
  <term><command>uic</command></term>
  <listitem>
    <para>is a Qt user interface compiler.</para>
    <indexterm zone="qt uic">
      <primary sortas="b-uic">uic</primary>
    </indexterm>
  </listitem>
</varlistentry>
</variablelist>

</sect2>
</sect1>