[46bca118] | 1 | <sect1 id="qt" xreflabel="Qt-&qt-version;">
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[19aa75a] | 2 | <?dbhtml filename="qt.html" ?>
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[46bca118] | 3 | <title>Qt-&qt-version;</title>
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[f45b1953] | 4 |
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[972150e7] | 5 | <sect2>
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| 6 | <title>Introduction to <application>Qt</application></title>
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[f45b1953] | 7 |
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[972150e7] | 8 | <para>The <application>Qt</application> package contains a
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| 9 | <application>C++</application> <acronym>GUI</acronym> library. This is useful
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| 10 | for creating graphical applications or executing graphical applications that
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| 11 | are dynamically linked to the <application>Qt</application> library. One of the
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| 12 | major users of <application>Qt</application> is <application>KDE</application>.</para>
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| 13 |
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| 14 | <sect3><title>Package information</title>
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| 15 | <itemizedlist spacing='compact'>
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| 16 | <listitem><para>Download (HTTP): <ulink url="&qt-download-http;"/></para></listitem>
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| 17 | <listitem><para>Download (FTP): <ulink url="&qt-download-ftp;"/></para></listitem>
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| 18 | <listitem><para>MD5 Sum: &qt-md5sum;</para></listitem>
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| 19 | <listitem><para>Download size: &qt-size;</para></listitem>
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| 20 | <listitem><para>Estimated Disk space required: &qt-buildsize;</para></listitem>
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| 21 | <listitem><para>Estimated build time: &qt-time;</para></listitem></itemizedlist>
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| 22 | </sect3>
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| 23 |
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| 24 | <sect3><title><application>Qt</application> dependencies</title>
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| 25 | <sect4><title>Required</title>
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| 26 | <para><xref linkend="x-installing"/></para>
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| 27 | </sect4>
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| 28 | <sect4><title>Recommended</title>
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| 29 | <para><xref linkend="libjpeg"/> and <xref linkend="libmng"/>.</para>
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| 30 | </sect4>
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| 31 |
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| 32 | <sect4><title>Optional</title>
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| 33 | <para><xref linkend="nas"/>, <xref linkend="cups"/>, <xref linkend="mysql"/>,
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| 34 | <xref linkend="postgresql"/>, <ulink url="http://firebird.sourceforge.net/">Firebird</ulink>,
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| 35 | and <ulink url="http://www.unixodbc.org/">unixODBC</ulink>.</para>
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| 36 | </sect4>
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| 37 | </sect3>
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| 38 | </sect2>
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| 39 |
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| 40 | <sect2>
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| 41 | <title>Installation of <application>Qt</application></title>
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| 42 |
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| 43 | <para>There are several ways to install a complicated package such as <application>Qt</application>.
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| 44 | The files are not completely position independent. Installation procedures execute the
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| 45 | program <filename>pkg-config</filename> to determine the location of package executables, libraries,
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| 46 | headers, and other files. For <application>Qt</application>, <filename>pkg-config</filename> will
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| 47 | look for the file <filename>lib/pkgconfig/qt-mt.pc</filename> which must be modified if relocating the
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| 48 | package. This file is set up correctly by the build process.</para>
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| 49 |
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| 50 | <para>The default installation places the files in <filename class='directory'>/usr/local/qt/</filename>.
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| 51 | Many commercial distributions place the files in the system's
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| 52 | <filename class='directory'>/usr</filename> hierarchy. The package can also be installed
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| 53 | in an arbitrary directory.</para>
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| 54 |
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| 55 | <para>This section will demonstrate two different methods.</para>
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| 56 |
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| 57 |
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| 58 | <note><para>The build time for <application>Qt</application> is quite long. If you want to
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| 59 | save some time and don't want the tutorials and examples, change the first make line to:</para>
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| 60 |
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| 61 | <para><userinput><command>make sub-tools</command></userinput></para>
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| 62 | </note>
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| 63 |
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| 64 | <sect3>
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| 65 | <title>Method 1 - Installing in the <filename class='directory'>/usr</filename> hierarchy</title>
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| 66 |
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| 67 | <para>The advantage of this method is that no updates to the <filename>/etc/ld.so.conf</filename>
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| 68 | or <filename>/etc/man.conf</filename> files are required. The package files
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| 69 | are distributed within several subdirectories of the <filename class='directory'>/usr</filename>
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| 70 | hierarchy. This is the method that most commercial distributions use.</para>
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| 71 |
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| 72 |
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| 73 | <screen><userinput><command>sed -i "s:cp -f:install:" mkspecs/linux-g++/qmake.conf &&
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| 74 | bash
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| 75 | export PATH=$PWD/bin:$PATH &&
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| 76 | export LD_LIBRARY_PATH=$PWD/lib &&
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| 77 | ./configure -prefix /usr -docdir /usr/share/doc/qt \
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| 78 | -headerdir /usr/include/qt -plugindir /usr/lib/qt/plugins \
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| 79 | -datadir /usr/share/qt -translationdir /usr/share/qt/translations \
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| 80 | -sysconfdir /etc/qt -qt-gif -system-zlib \
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| 81 | -no-exceptions -thread -plugin-imgfmt-png -system-libpng &&
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| 82 | find -type f -name Makefile | xargs sed -i "s@-Wl,-rpath,/usr/lib@@g" &&
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[2657b9c] | 83 | make &&
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[972150e7] | 84 | make install &&
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| 85 | ln -sf libqt-mt.so /usr/lib/libqt.so &&
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| 86 | cp -r doc/man /usr/share &&
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| 87 | cp -r examples /usr/share/doc/qt &&
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| 88 | exit</command></userinput></screen>
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| 89 |
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| 90 | </sect3>
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| 91 |
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| 92 | <sect3>
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| 93 | <title>Method 2 - Installing in <filename class='directory'>/opt</filename></title>
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| 94 |
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| 95 | <para>This is the method recommended by the <application>Qt</application> developers. It
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| 96 | has the advantage of keeping all the package files consolidated in a dedicated directory
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| 97 | hierarchy. By using this method, an update can be made without overwriting a previous
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| 98 | installation and users can easily back up to a previous version by changing one symbolic
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| 99 | link.</para>
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| 100 |
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| 101 | <para>The <application>Qt</application> developers use a default location of
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| 102 | <filename class='directory'>/usr/local/qt/</filename>, however this procedure puts the files
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| 103 | in <filename class='directory'>/opt/qt-&qt-version;/</filename> and then creates a
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| 104 | symbolic link to <filename>/opt/qt/</filename>.</para>
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| 105 |
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| 106 |
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| 107 | <screen><userinput><command>bash
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| 108 | export QTDIR=$PWD &&
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| 109 | export LD_LIBRARY_PATH=$PWD/lib &&
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| 110 | export PATH=$PWD/bin:$PATH &&
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| 111 | ./configure -prefix /opt/qt-&qt-version; -qt-gif -system-libpng \
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| 112 | -system-libmng -system-zlib -system-libjpeg -no-exceptions \
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| 113 | -thread -plugin-imgfmt-png &&
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| 114 | make &&
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| 115 | make install &&
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| 116 | ln -sfn qt-&qt-version; /opt/qt &&
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| 117 | ln -s libqt-mt.so /opt/qt/lib/libqt.so &&
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| 118 | cp -r doc/man /opt/qt/doc &&
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| 119 | cp -r examples /opt/qt/doc
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| 120 | exit</command></userinput></screen>
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| 121 |
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| 122 | <sect4>
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| 123 | <title>Configuration</title>
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| 124 |
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| 125 | <para>For Method 2 only, update the <filename>/etc/ld.so.conf</filename> and
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| 126 | <filename>/etc/man.conf</filename> files.</para>
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| 127 |
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| 128 |
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| 129 | <screen><userinput><command>cat >> /etc/ld.so.conf << "EOF"
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| 130 | # Begin qt addition to /etc/ld.so.conf
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| 131 |
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| 132 | /opt/qt/lib
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| 133 |
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| 134 | # End qt addition
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| 135 | EOF
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| 136 | ldconfig
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| 137 |
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| 138 | cat >> /etc/man.conf << "EOF"
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| 139 | # Begin qt addition to man.conf
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[f45b1953] | 140 |
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[972150e7] | 141 | MANPATH /opt/qt/doc/man
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| 142 |
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| 143 | # End qt addition to man.conf
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| 144 | EOF</command></userinput></screen>
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| 145 | </sect4>
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| 146 | </sect3>
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| 147 | </sect2>
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| 148 |
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| 149 | <sect2>
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| 150 | <title>Command explanations</title>
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| 151 |
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| 152 | <para><command>sed -i "s:cp -f:install:" mkspecs/linux-g++/qmake.conf</command>:
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| 153 | <command>install</command> is safer than <command>cp</command> when
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| 154 | libraries are in use.</para>
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| 155 |
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| 156 | <para><command>bash</command>: This command enters a sub-shell to isolate
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| 157 | environment changes.</para>
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| 158 |
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| 159 | <para><command>export QTDIR=$PWD</command>: This command
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| 160 | defines where the root of the Qt directory is located.</para>
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| 161 |
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| 162 | <para><command>export LD_LIBRARY_PATH=$PWD/lib</command>: This command
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| 163 | sets up the location of libraries for the build process.</para>
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| 164 |
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| 165 | <para><command>export PATH=$PWD/bin:$PATH</command>: This command
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| 166 | allows the build process to find supporting executables.</para>
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| 167 |
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| 168 | <para><parameter>-qt-gif</parameter>: This switch adds support for gif
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| 169 | files to the libraries.</para>
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| 170 |
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| 171 | <para><parameter>-system-zlib -system-libpng</parameter>: This switch
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| 172 | forces the library to use the shared libraries that are on your system
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| 173 | instead of recreating its own set of support libraries for these
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| 174 | functions.</para>
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| 175 |
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| 176 | <para><parameter>-no-exceptions</parameter>: This switch disables
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| 177 | the exceptions coding generated by the <application>C++</application> compiler.</para>
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| 178 |
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| 179 | <para><parameter>-thread</parameter>: This switch adds
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| 180 | support for multi-threading.</para>
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| 181 |
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| 182 | <para><command>find -type f -name Makefile | xargs sed -i "s@-Wl,-rpath,/usr/lib@@g"</command>:
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| 183 | This command removes hardcoded run-time path, else
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| 184 | <command>uic</command> tries to run with system installed Qt
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| 185 | libraries.</para>
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| 186 |
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| 187 | <para><command>ln -s libqt-mt.so /usr/lib/libqt.so</command>: This
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| 188 | command allows configure scripts
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| 189 | to find a working <application>Qt</application> installation.</para>
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| 190 |
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| 191 | <para><command>cp -r doc/man /usr/share (or /opt/qt/doc)</command>: This command
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| 192 | installs the man pages which are missed by <command>make install</command>.</para>
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| 193 |
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| 194 | <para><command>cp -r examples /usr/share/doc/qt (or /opt/qt/doc)</command>: This command
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| 195 | installs the examples which are missed by <command>make install</command>.</para>
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| 196 |
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| 197 | <para><command>exit</command>: This command returns to the parent shell
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| 198 | and eliminates environment variables set earlier.</para>
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| 199 |
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| 200 | </sect2>
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| 201 | <sect2>
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| 202 | <title>Configuring <application>Qt</application></title>
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| 203 |
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| 204 | <sect3><title>Configuration Information</title>
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| 205 |
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| 206 | &library-config;
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| 207 |
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| 208 | </sect3>
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| 209 |
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| 210 | </sect2>
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| 211 | <sect2>
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| 212 | <title>Contents</title>
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| 213 |
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| 214 | <para>The <application>Qt</application>/<application>X11</application>
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| 215 | library contains <acronym>API</acronym>'s necessary to use
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| 216 | programs based on Qt <acronym>GUI</acronym> toolkit.</para>
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| 217 |
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| 218 | <para>The <application>Qt</application> package contains
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| 219 | <command>assistant</command>,
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| 220 | <command>designer</command>,
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| 221 | <command>linguist</command>,
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| 222 | <command>lrelease</command>,
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| 223 | <command>lupdate</command>,
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| 224 | <command>moc</command>,
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| 225 | <command>qm2ts</command>,
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| 226 | <command>qmake</command>,
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| 227 | <command>qtconfig</command>,
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| 228 | <command>uic</command>, and the
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| 229 | <filename class="libraryfile">libqt-mt</filename> and
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| 230 | <filename class="libraryfile">libqui</filename> libraries.</para>
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| 231 |
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| 232 | </sect2>
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| 233 | </sect1>
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