[ceb3dc7] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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[e10e1a8e] | 7 | <!ENTITY qtwebengine-major "5.14">
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[57e07f4] | 8 | <!ENTITY qtwebengine-download-http "https://download.qt.io/archive/qt/&qtwebengine-major;/&qtwebengine-version;/submodules/qtwebengine-everywhere-src-&qtwebengine-version;.tar.xz">
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[ceb3dc7] | 9 | <!ENTITY qtwebengine-download-ftp " ">
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[8f7b900] | 10 | <!ENTITY qtwebengine-md5sum "26eb3bb5cd1e47320d74f4115a879b10">
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| 11 | <!ENTITY qtwebengine-size "232 MB">
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[e10e1a8e] | 12 | <!ENTITY qtwebengine-buildsize "3.6 GB (146 MB installed)">
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[8f7b900] | 13 | <!ENTITY qtwebengine-time "68 SBU (using 4 cores)">
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[ceb3dc7] | 14 | ]>
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| 15 |
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| 16 | <sect1 id="qtwebengine" xreflabel="qtwebengine-&qtwebengine-version;">
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| 17 | <?dbhtml filename="qtwebengine.html"?>
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| 18 |
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| 19 | <sect1info>
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| 20 | <othername>$LastChangedBy$</othername>
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| 21 | <date>$Date$</date>
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| 22 | </sect1info>
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| 23 |
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| 24 | <title>QtWebEngine-&qtwebengine-version;</title>
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| 25 |
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| 26 | <indexterm zone="qtwebengine">
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| 27 | <primary sortas="a-qtwebengine">qtwebengine</primary>
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| 28 | </indexterm>
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| 29 |
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| 30 | <sect2 role="package">
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| 31 | <title>Introduction to QtWebEngine</title>
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| 32 |
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| 33 | <para>
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| 34 | <application>QtWebEngine</application> integrates
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[55a55f1] | 35 | <application>chromium</application>'s web capabilities into Qt. It
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[a9c0e8d] | 36 | ships with its own copy of ninja which it uses for the build if it cannot
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| 37 | find a system copy, and various copies of libraries from ffmpeg, icu,
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| 38 | libvpx, and zlib (including libminizip) which have been forked by the
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[ceb3dc7] | 39 | <application>chromium</application> developers.
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| 40 | </para>
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| 41 |
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[6a62e34] | 42 | &lfs90_checked;
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[088e7e06] | 43 |
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[55a55f1] | 44 | <note>
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| 45 | <para>
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| 46 | By default, ninja will use all online CPUs +2 (if at least 4 exist),
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| 47 | even if they are not available to the current task because the build
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| 48 | terminal has been restricted with 'taskset'. To work around this, see
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| 49 | the Command Explanations below.
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| 50 | </para>
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| 51 |
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| 52 | <para>
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| 53 | Unusually, the shipped GN build system (used to create the Ninja files)
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| 54 | requires a static <filename class="libraryfile">libstdc++.a</filename>
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| 55 | although the installed libraries correctly use the shared version. If
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| 56 | that static library is not present, the build will fail quite quickly.
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[5510d3e] | 57 | Please note that if you try to build webengine as part of
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| 58 | <application>Qt</application> and the static library is not available,
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| 59 | that build will either complete without installing webengine, or else fail
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| 60 | during the install (both variants have been observed in 5.12.0).
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[55a55f1] | 61 | </para>
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| 62 | </note>
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[ceb3dc7] | 63 |
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| 64 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 65 | <itemizedlist spacing="compact">
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| 66 | <listitem>
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| 67 | <para>
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| 68 | Download (HTTP): <ulink url="&qtwebengine-download-http;"/>
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| 69 | </para>
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| 70 | </listitem>
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| 71 | <listitem>
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| 72 | <para>
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| 73 | Download (FTP): <ulink url="&qtwebengine-download-ftp;"/>
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| 74 | </para>
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| 75 | </listitem>
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| 76 | <listitem>
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| 77 | <para>
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| 78 | Download MD5 sum: &qtwebengine-md5sum;
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| 79 | </para>
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| 80 | </listitem>
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| 81 | <listitem>
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| 82 | <para>
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| 83 | Download size: &qtwebengine-size;
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| 84 | </para>
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| 85 | </listitem>
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| 86 | <listitem>
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| 87 | <para>
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| 88 | Estimated disk space required: &qtwebengine-buildsize;
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| 89 | </para>
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| 90 | </listitem>
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| 91 | <listitem>
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| 92 | <para>
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| 93 | Estimated build time: &qtwebengine-time;
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| 94 | </para>
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| 95 | </listitem>
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| 96 | </itemizedlist>
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[40b70d8] | 97 | <!--
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[1d776f0b] | 98 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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| 99 | <itemizedlist spacing="compact">
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| 100 | <listitem>
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| 101 | <para>
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[52249aa] | 102 | Required patch:
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| 103 | <ulink url="&patch-root;/qtwebengine-&qtwebengine-version;-background_rendering_fix-1.patch"/>
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[1d776f0b] | 104 | </para>
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| 105 | </listitem>
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| 106 | </itemizedlist>
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[40b70d8] | 107 | -->
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[ceb3dc7] | 108 | <bridgehead renderas="sect3">qtwebengine Dependencies</bridgehead>
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| 109 |
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| 110 | <bridgehead renderas="sect4">Required</bridgehead>
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| 111 | <!-- the qmake output tends to be misleading. 'khr' is from Mesa -->
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| 112 | <para role="required">
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| 113 | <xref linkend="nss"/>,
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[55a55f1] | 114 | <xref linkend="python2"/>, and
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[ceb3dc7] | 115 | <xref linkend='qt5'/>
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| 116 | </para>
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| 117 |
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| 118 | <bridgehead renderas="sect4">Recommended</bridgehead>
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| 119 | <note>
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| 120 | <para>
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| 121 | If these packages are not installed, the build process will compile and
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| 122 | install its own (perhaps older) version, with the side effect of
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| 123 | increasing build and installed disk space and build time.
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| 124 | </para>
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| 125 | </note>
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| 126 |
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| 127 | <para role="recommended">
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[55a55f1] | 128 | either <xref linkend="alsa-lib"/> or
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| 129 | <xref linkend="pulseaudio"/> (or both),
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| 130 | <xref linkend="ffmpeg"/>,
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[0cf3733] | 131 | <xref linkend="Jinja2"/> (Python 2 module),
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[55a55f1] | 132 | <xref linkend="icu"/>,
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[ceb3dc7] | 133 | <xref linkend="libwebp"/>,
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[55a55f1] | 134 | <xref linkend="libxslt"/>, and
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[f5932da] | 135 | <xref linkend="opus"/>
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[ceb3dc7] | 136 | </para>
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| 137 |
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| 138 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 139 | <para role="optional">
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| 140 | <xref linkend="libevent"/>,
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[e847737] | 141 | <xref linkend="poppler"/>,
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[ceb3dc7] | 142 | <ulink url="https://github.com/open-source-parsers/jsoncpp/releases">jsoncpp</ulink>,
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| 143 | <ulink url="https://github.com/cisco/libsrtp/releases">libsrtp</ulink>,
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| 144 | <ulink url="http://google.github.io/snappy/">snappy</ulink>
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| 145 | </para>
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| 146 |
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| 147 | <para condition="html" role="usernotes">
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| 148 | User Notes: <ulink url="&blfs-wiki;/qtwebengine"/>
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| 149 | </para>
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| 150 | </sect2>
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| 151 |
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| 152 | <sect2 role="installation">
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| 153 | <title>Installation of qtwebengine</title>
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| 154 |
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[55a55f1] | 155 | <para>
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| 156 | First, ensure that the local headers are available when not building as
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| 157 | part of the complete <xref linkend="qt5"/>:
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| 158 | </para>
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| 159 |
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| 160 | <screen><userinput>find -type f -name "*.pr[io]" |
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| 161 | xargs sed -i -e 's|INCLUDEPATH += |&$$QTWEBENGINE_ROOT/include |'</userinput></screen>
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[40b70d8] | 162 | <!--
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[52249aa] | 163 | <para>
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| 164 | Next, apply a patch that fixes background rendering issues in Falkon,
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| 165 | and crashes on multimedia-heavy sites.
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| 166 | </para>
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| 167 |
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| 168 | <screen><userinput remap="pre">patch -Np1 -i ../qtwebengine-&qtwebengine-version;-background_rendering_fix-1.patch</userinput></screen>
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[40b70d8] | 169 | -->
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[ae39488] | 170 |
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| 171 | <para>
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| 172 | Next, allow the pulseaudio library to be linked at build time, instead
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| 173 | of run time. This also prevents an issue with newer pulseaudio:
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| 174 | </para>
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| 175 |
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| 176 | <screen><userinput>sed -e '/link_pulseaudio/s/false/true/' \
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| 177 | -i src/3rdparty/chromium/media/media_options.gni</userinput></screen>
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| 178 |
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[e90b81d] | 179 | <para>
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| 180 | Finally, fix a change in the build system which allows its developers to
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| 181 | pass e.g. -j20 to make (for quick tests of some areas) but breaks the
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| 182 | build with LFS's use of the NINJAJOBS environment variable:
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| 183 | </para>
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| 184 |
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| 185 | <!-- editors: See thread at
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| 186 | http://lists.linuxfromscratch.org/pipermail/blfs-dev/2019-December/036996.html
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| 187 | et.seq, particularly 037002.html which shows the commit near the end. -->
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| 188 |
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| 189 | <screen><userinput>sed -i 's/NINJAJOBS/NINJA_JOBS/' src/core/gn_run.pro</userinput></screen>
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| 190 |
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[55a55f1] | 191 | <para>
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| 192 | If an older version of the package's main library has been installed,
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| 193 | when the package is built separately it will link to that in preference
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| 194 | to its own not-yet-installed version, and fail because of missing symbols.
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| 195 | Prevent that by, as the <systemitem class="username">root</systemitem>
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[fa4e429] | 196 | user, moving the symlink out of the way:
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[55a55f1] | 197 | </para>
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| 198 |
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[8eb0021] | 199 | <screen role="root"><userinput>if [ -e ${QT5DIR}/lib/libQt5WebEngineCore.so ]; then
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| 200 | mv -v ${QT5DIR}/lib/libQt5WebEngineCore.so{,.old}
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[05b66d9a] | 201 | fi</userinput></screen>
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[55a55f1] | 202 |
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[d4bafcc7] | 203 | <para>
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| 204 | Install <application>qtwebengine</application> by running the following
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| 205 | commands:
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| 206 | </para>
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[1d776f0b] | 207 |
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[c716497] | 208 | <screen><userinput>mkdir build &&
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[640f4c21] | 209 | cd build &&
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[ceb3dc7] | 210 |
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[2234c90] | 211 | qmake .. -- -system-ffmpeg -webengine-icu &&
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[640f4c21] | 212 | make</userinput></screen>
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| 213 | <!--
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[ceb3dc7] | 214 | <para>
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| 215 | if you wish to build the HTML documentation, issue:
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| 216 | </para>
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| 217 |
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| 218 | <screen><userinput>make docs</userinput></screen>
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[640f4c21] | 219 | -->
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[ceb3dc7] | 220 | <para>
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| 221 | This package does not come with a test suite.
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| 222 | </para>
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| 223 |
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| 224 | <para>
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| 225 | Now, as the <systemitem class="username">root</systemitem> user:
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| 226 | </para>
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| 227 |
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[640f4c21] | 228 | <screen role="root"><userinput>make install</userinput></screen>
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[e847737] | 229 | <!-- EDITORS NOTE: If you are updating this package, use INSTALL_ROOT=
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| 230 | instead of DESTDIR= -->
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[640f4c21] | 231 | <!--
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[ceb3dc7] | 232 | <para>
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| 233 | If you built the HTML documentation, install it with:
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| 234 | </para>
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| 235 |
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| 236 | <screen role="root"><userinput>make install_docs</userinput></screen>
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[640f4c21] | 237 | -->
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[ceb3dc7] | 238 | <para>
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| 239 | Remove references to the build directory from installed library
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| 240 | dependency (prl) files by running the following
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| 241 | commands as the <systemitem class="username">root</systemitem> user:
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| 242 | </para>
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| 243 |
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[dff94d4] | 244 | <screen role="root"><userinput>find $QT5DIR/ -name \*.prl \
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[ceb3dc7] | 245 | -exec sed -i -e '/^QMAKE_PRL_BUILD_DIR/d' {} \;</userinput></screen>
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| 246 | </sect2>
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| 247 |
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| 248 | <sect2 role="commands">
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| 249 | <title>Command Explanations</title>
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| 250 |
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| 251 | <para>
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[640f4c21] | 252 | <command>qmake</command>: This will build the included copy of
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| 253 | <application>ninja</application> if it is not already installed
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[088e7e06] | 254 | and use it to configure the build.
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| 255 | </para>
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| 256 |
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[55a55f1] | 257 | <para>
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[2234c90] | 258 | <command>-- -system-ffmpeg -webengine-icu</command>: If any options are
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[0fccf51d] | 259 | passed to qmake they must come after '--' which must follow '..' that points
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[55a55f1] | 260 | to the main directory. The options here cause it to use system ffmpeg and
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| 261 | system icu. If built as part of full Qt5, the system icu is automatically
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| 262 | used (only) by Qt5Core if it is available, but unless this option is used
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| 263 | webengine will always use its shipped copy of icu, adding time and space
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| 264 | to the build.
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| 265 | </para>
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| 266 |
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[c716497] | 267 | <!--
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[52249aa] | 268 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 269 | href="../../xincludes/SIOCGSTAMP.xml"/>
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[c716497] | 270 | -->
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[52249aa] | 271 |
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[088e7e06] | 272 | <para>
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| 273 | <option>NINJAJOBS=4 make</option>: If you patched system ninja in LFS to
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| 274 | recognize the NINJAJOBS environment variable, this command will run system
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[5c7f2497] | 275 | ninja with the specified number of jobs (i.e. 4).
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| 276 | There are several reasons why you might want to do this:</para>
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| 277 |
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| 278 | <itemizedlist>
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| 279 | <listitem>
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| 280 | <para> Building on a subset of CPUs allows measuring the build time
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| 281 | for that number of processors or to run other CPU-intensive tasks on
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| 282 | other cores.</para>
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| 283 | </listitem>
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| 284 | <listitem>
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| 285 | <para>Improving the build speed on a less-well endowed 4-core
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| 286 | machine. On a machine with a powerful CPU and plenty of RAM, running
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| 287 | N+2 jobs (the ninja default for 4+ cores) for the large working sets
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| 288 | of the C++ compiles in this package is typically only marginally
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| 289 | faster than running N jobs at a time. But for a machine with less
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| 290 | memory it can be much slower.</para>
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| 291 | </listitem>
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| 292 | <listitem>
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| 293 | <para>Reducing the number of cores being used on long running, CPU
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| 294 | intensive packages may alleviate heat problems.</para>
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| 295 | </listitem>
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| 296 | </itemizedlist>
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[ceb3dc7] | 297 |
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| 298 | </sect2>
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| 299 |
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[55a55f1] | 300 | <sect2 role="configuration">
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| 301 | <title>Configuring QtWebEngine</title>
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| 302 |
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| 303 | <sect3 id="qtwebengine-config">
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| 304 | <title>Configuration Information</title>
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| 305 |
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| 306 | <para>
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| 307 | If you are upgrading from an older minor version of this
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| 308 | application, for some webpages to load you may need to
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| 309 | clear the <emphasis>browser</emphasis> caches, e.g. for
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| 310 | <application>falkon</application> they will be found in
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| 311 | <filename class="directory">~/.cache/falkon/</filename>.
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| 312 | You will need to do this if the browser starts to render
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| 313 | the page and then changes to a blank tab with a message
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| 314 | that something went wrong, and a button to Retry. Even
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| 315 | after removing the old caches, you may need to retry a
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| 316 | few times for each affected tab.
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| 317 | </para>
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| 318 |
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| 319 | </sect3>
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| 320 |
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| 321 | </sect2>
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| 322 |
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| 323 |
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[ceb3dc7] | 324 | <sect2 role="content">
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| 325 | <title>Contents</title>
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| 326 |
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| 327 | <segmentedlist>
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| 328 | <segtitle>Installed Programs</segtitle>
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| 329 | <segtitle>Installed Libraries</segtitle>
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| 330 | <segtitle>Installed Directories</segtitle>
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| 331 |
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| 332 | <seglistitem>
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| 333 | <seg>
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[640f4c21] | 334 | qtwebengine_convert_dict and
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[e10e1a8e] | 335 | QtWebEngineProcess (in $QT5DIR/libexec)
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[ceb3dc7] | 336 | </seg>
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| 337 | <seg>
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[640f4c21] | 338 | libQt5WebEngineCore.so,
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| 339 | libQt5WebEngine.so, and
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| 340 | libQt5WebEngineWidgets.so
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[ceb3dc7] | 341 | </seg>
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| 342 | <seg>
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[e10e1a8e] | 343 | $QT5DIR/include/QtWebEngine,
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| 344 | $QT5DIR/include/QtWebEngineCore,
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| 345 | $QT5DIR/include/QtWebEngineWidgets,
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| 346 | $QT5DIR/qml/QtWebEngine, and
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| 347 | $QT5DIR/translations/qtwebengine_locales
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[ceb3dc7] | 348 | </seg>
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| 349 | </seglistitem>
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| 350 | </segmentedlist>
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| 351 |
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| 352 | <variablelist>
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| 353 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 354 | <?dbfo list-presentation="list"?>
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| 355 | <?dbhtml list-presentation="table"?>
|
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| 356 |
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| 357 | <varlistentry id="qtwebengine_convert_dict">
|
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| 358 | <term><command>qtwebengine_convert_dict</command></term>
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| 359 | <listitem>
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| 360 | <para>
|
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| 361 | converts hunspell dictionaries (<literal>.dic</literal>) to chromium
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| 362 | format (<literal>.bdic</literal>)
|
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| 363 | </para>
|
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| 364 | <indexterm zone="qtwebengine qtwebengine_convert_dict">
|
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| 365 | <primary sortas="b-qtwebengine_convert_dict">qtwebengine_convert_dict</primary>
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| 366 | </indexterm>
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| 367 | </listitem>
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| 368 | </varlistentry>
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| 369 |
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| 370 | <varlistentry id="QtWebEngineProcess">
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| 371 | <term><command>QtWebEngineProcess</command></term>
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| 372 | <listitem>
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| 373 | <para>
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| 374 | is a libexec program which runs a zygote process (one that listens
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| 375 | for spawn requests from a master process and will fork itself in
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| 376 | response).
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| 377 | </para>
|
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| 378 | <indexterm zone="qtwebengine QtWebEngineProcess">
|
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| 379 | <primary sortas="b-QtWebEngineProcess">QtWebEngineProcess</primary>
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| 380 | </indexterm>
|
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| 381 | </listitem>
|
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| 382 | </varlistentry>
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| 383 |
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| 384 | <varlistentry id="libQtWebEngine-lib">
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| 385 | <term><filename class="libraryfile">libQtWebEngine.so</filename></term>
|
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| 386 | <listitem>
|
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| 387 | <para>
|
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| 388 | provides QML types for rendering web content within a QML application.
|
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| 389 | </para>
|
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| 390 | <indexterm zone="qtwebengine libQtWebEngine-lib">
|
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| 391 | <primary sortas="c-libQtWebEngine">libQtWebEngine.so</primary>
|
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| 392 | </indexterm>
|
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| 393 | </listitem>
|
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| 394 | </varlistentry>
|
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| 395 |
|
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| 396 | <varlistentry id="libQtWebEngineCore">
|
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| 397 | <term><filename class="libraryfile">libQtWebEngineCore.so</filename></term>
|
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| 398 | <listitem>
|
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| 399 | <para>
|
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| 400 | provides public API shared by both QtWebEngine and QtWebEngineWidgets.
|
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| 401 | </para>
|
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| 402 | <indexterm zone="qtwebengine libQtWebEngineCore">
|
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| 403 | <primary sortas="c-libQtWebEngineCore">libQtWebEngineCore.so</primary>
|
---|
| 404 | </indexterm>
|
---|
| 405 | </listitem>
|
---|
| 406 | </varlistentry>
|
---|
| 407 |
|
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| 408 | <varlistentry id="libQtWebEngineWidgets">
|
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| 409 | <term><filename class="libraryfile">libQtWebEngineWidgets.so</filename></term>
|
---|
| 410 | <listitem>
|
---|
| 411 | <para>
|
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| 412 | provides a web browser engine as well as C++ classes to render and
|
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| 413 | interact with web content.
|
---|
| 414 | </para>
|
---|
| 415 | <indexterm zone="qtwebengine libQtWebEngineWidgets">
|
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| 416 | <primary sortas="c-libQtWebEngineWidgets">libQtWebEngineWidgets.so</primary>
|
---|
| 417 | </indexterm>
|
---|
| 418 | </listitem>
|
---|
| 419 | </varlistentry>
|
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| 420 |
|
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| 421 | </variablelist>
|
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| 422 | </sect2>
|
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| 423 | </sect1>
|
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