[ab4fdfc] | 1 | <?xml version="1.0" encoding="UTF-8"?>
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[ceb3dc7] | 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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[f806bbf2] | 7 | <!ENTITY qtwebengine-download-http "https://download.qt.io/official_releases/qt/&qtwebengine-major;/&qtwebengine-version;/submodules/qtwebengine-everywhere-src-&qtwebengine-version;.tar.xz">
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[ceb3dc7] | 8 | <!ENTITY qtwebengine-download-ftp " ">
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[9192fec] | 9 | <!ENTITY qtwebengine-md5sum "1ea326e16c0453509b5be8c4d6378fa9">
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| 10 | <!ENTITY qtwebengine-size "540 MB">
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| 11 | <!ENTITY qtwebengine-buildsize "9.1 GB (343 MB installed)">
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| 12 | <!ENTITY qtwebengine-time "42 SBU (Using parallelism=8)">
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[ceb3dc7] | 13 | ]>
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| 14 |
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| 15 | <sect1 id="qtwebengine" xreflabel="qtwebengine-&qtwebengine-version;">
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| 16 | <?dbhtml filename="qtwebengine.html"?>
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| 17 |
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| 18 | <title>QtWebEngine-&qtwebengine-version;</title>
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| 19 |
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| 20 | <indexterm zone="qtwebengine">
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| 21 | <primary sortas="a-qtwebengine">qtwebengine</primary>
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| 22 | </indexterm>
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| 23 |
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| 24 | <sect2 role="package">
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| 25 | <title>Introduction to QtWebEngine</title>
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| 26 |
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| 27 | <para>
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| 28 | <application>QtWebEngine</application> integrates
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[55a55f1] | 29 | <application>chromium</application>'s web capabilities into Qt. It
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[a9c0e8d] | 30 | ships with its own copy of ninja which it uses for the build if it cannot
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| 31 | find a system copy, and various copies of libraries from ffmpeg, icu,
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| 32 | libvpx, and zlib (including libminizip) which have been forked by the
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[ceb3dc7] | 33 | <application>chromium</application> developers.
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| 34 | </para>
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| 35 |
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[6ab9228f] | 36 | <para>
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| 37 | This package and browsers using it may be useful if you need to use a
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| 38 | website designed for google chrome, or chromium, browsers.
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| 39 | </para>
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| 40 |
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| 41 | <warning>
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| 42 | <para>
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| 43 | QtWebEngine uses a forked copy of chromium, and is therefore vulnerable
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| 44 | to many issues found there. The Qt developers seem to fork a newer
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| 45 | version for minor Qt versions, but because chromium moves to newer
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| 46 | versions very often, by the time the Qt developers get a forked version
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| 47 | to pass their extended tests it is always an old version and security
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| 48 | fixes from chromium (some of which have a CVE number) can take several
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| 49 | months to appear in a QtWebengine release, even if the severity has been
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| 50 | rated as Critical.
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| 51 | </para>
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| 52 |
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| 53 | <para>
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| 54 | Therefore, you should be wary of using QtWebEngine in a sensitive
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| 55 | context and should always update to the next release as soon as it
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| 56 | appears in this book, even if is not flagged as a Security Update.
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| 57 | Identifying which vulnerabilities have been fixed in a particular
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| 58 | release requires pulling the appropriate 'based-NNN' branch just before
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| 59 | the previous and current releases and is often impractical. Reports of
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| 60 | fixed QTBUG items do not seem to be available and there is not any
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| 61 | documentation in the tarball for changes after the qt-5 versions.
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| 62 | </para>
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| 63 | </warning>
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[455eec0] | 64 |
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[6360539] | 65 | &lfs122_checked;
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[088e7e06] | 66 |
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[00032e41] | 67 | <warning>
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[55a55f1] | 68 | <para>
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| 69 | By default, ninja will use all online CPUs +2 (if at least 4 exist),
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| 70 | even if they are not available to the current task because the build
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[8558044] | 71 | terminal has been restricted with 'taskset'. In BLFS, this package
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[511e498] | 72 | takes more time to build than any other. In one example,
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[8558044] | 73 | the build of this package crashed at about the 90 percent point
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| 74 | due to an out of memory problem on a system with 24 cores and 32 GB
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[00032e41] | 75 | of memory.
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[55a55f1] | 76 | </para>
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| 77 |
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[00032e41] | 78 | <para>
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| 79 | To work around this, see the Command Explanations below.
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| 80 | </para>
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| 81 | </warning>
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[9e0ab833] | 82 |
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[ceb3dc7] | 83 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 84 | <itemizedlist spacing="compact">
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| 85 | <listitem>
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| 86 | <para>
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| 87 | Download (HTTP): <ulink url="&qtwebengine-download-http;"/>
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| 88 | </para>
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| 89 | </listitem>
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| 90 | <listitem>
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| 91 | <para>
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| 92 | Download (FTP): <ulink url="&qtwebengine-download-ftp;"/>
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| 93 | </para>
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| 94 | </listitem>
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| 95 | <listitem>
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| 96 | <para>
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| 97 | Download MD5 sum: &qtwebengine-md5sum;
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| 98 | </para>
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| 99 | </listitem>
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| 100 | <listitem>
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| 101 | <para>
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| 102 | Download size: &qtwebengine-size;
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| 103 | </para>
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| 104 | </listitem>
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| 105 | <listitem>
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| 106 | <para>
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| 107 | Estimated disk space required: &qtwebengine-buildsize;
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| 108 | </para>
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| 109 | </listitem>
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| 110 | <listitem>
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| 111 | <para>
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| 112 | Estimated build time: &qtwebengine-time;
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| 113 | </para>
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| 114 | </listitem>
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| 115 | </itemizedlist>
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[9192fec] | 116 | <!--
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[1d776f0b] | 117 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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[9192fec] | 118 | <itemizedlist spacing="compact"> -->
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[a7787e3] | 119 | <!-- keep links for releases and git versions as a reminder
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[94f5f13d] | 120 | that the tarball names names differ
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[a7787e3] | 121 | <ulink url="&patch-root;/qtwebengine-everywhere-src-&qtwebengine-version;-ICU68-2.patch"/>-->
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| 122 | <!--<ulink url="&patch-root;/qtwebengine-&qtwebengine-version;-5.15.7-1.patch"/>-->
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[9192fec] | 123 | <!-- <listitem>
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[aebb5271] | 124 | <para>
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| 125 | Required patch:
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[a7787e3] | 126 | <ulink url="&patch-root;/qtwebengine-&qtwebengine-version;-ffmpeg7_fixes-1.patch"/>
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[2a89d308] | 127 | </para>
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| 128 | </listitem>
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[1d776f0b] | 129 | </itemizedlist>
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[9192fec] | 130 | -->
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[72119155] | 131 |
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[ceb3dc7] | 132 | <bridgehead renderas="sect3">qtwebengine Dependencies</bridgehead>
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| 133 |
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| 134 | <bridgehead renderas="sect4">Required</bridgehead>
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[f806bbf2] | 135 |
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[ceb3dc7] | 136 | <para role="required">
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[7ef2fd34] | 137 | <xref linkend="cups"/>,
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[a3e69b9b] | 138 | <xref linkend="html5lib"/>,
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[639a5b9] | 139 | <xref linkend="nodejs"/>,
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[ceb3dc7] | 140 | <xref linkend="nss"/>,
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[f806bbf2] | 141 | <xref linkend="pciutils"/>, and
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| 142 | <xref linkend='qt6'/>
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[ceb3dc7] | 143 | </para>
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| 144 |
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| 145 | <bridgehead renderas="sect4">Recommended</bridgehead>
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| 146 | <note>
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| 147 | <para>
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| 148 | If these packages are not installed, the build process will compile and
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| 149 | install its own (perhaps older) version, with the side effect of
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| 150 | increasing build and installed disk space and build time.
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| 151 | </para>
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| 152 | </note>
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| 153 |
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| 154 | <para role="recommended">
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[55a55f1] | 155 | either <xref linkend="alsa-lib"/> or
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| 156 | <xref linkend="pulseaudio"/> (or both),
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| 157 | <xref linkend="ffmpeg"/>,
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[ead4657] | 158 | <xref linkend="icu"/>,
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[ceb3dc7] | 159 | <xref linkend="libwebp"/>,
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[55a55f1] | 160 | <xref linkend="libxslt"/>, and
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[f5932da] | 161 | <xref linkend="opus"/>
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[ceb3dc7] | 162 | </para>
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| 163 |
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| 164 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 165 | <para role="optional">
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| 166 | <xref linkend="libevent"/>,
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[ff00f810] | 167 | <xref linkend="mitkrb"/>,
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[d885388] | 168 | <xref linkend="pipewire"/>,
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[e847737] | 169 | <xref linkend="poppler"/>,
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[ceb3dc7] | 170 | <ulink url="https://github.com/open-source-parsers/jsoncpp/releases">jsoncpp</ulink>,
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| 171 | <ulink url="https://github.com/cisco/libsrtp/releases">libsrtp</ulink>,
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[87fc185] | 172 | <ulink url="https://google.github.io/snappy/">snappy</ulink>
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[ceb3dc7] | 173 | </para>
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| 174 |
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| 175 | </sect2>
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| 176 |
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| 177 | <sect2 role="installation">
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| 178 | <title>Installation of qtwebengine</title>
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[9192fec] | 179 | <!--
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[a7787e3] | 180 | <para>
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| 181 | First, adapt the bundled copy of Chromium to the latest version of ffmpeg:
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| 182 | </para>
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| 183 |
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| 184 | <screen><userinput remap="pre">patch -Np1 -d src/3rdparty/chromium < ../qtwebengine-&qtwebengine-version;-ffmpeg7_fixes-1.patch</userinput></screen>
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[9192fec] | 185 | -->
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[a7787e3] | 186 | <para>
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[9192fec] | 187 | First, fix a build failure that occurs because the BLFS build of ffmpeg
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[a7787e3] | 188 | does not use OpenH264:
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| 189 | </para>
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| 190 |
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| 191 | <screen><userinput remap="pre">sed -e '189 s/=/& false/' \
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| 192 | -e '190 d' \
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| 193 | -i.orig src/3rdparty/chromium/third_party/webrtc/webrtc.gni</userinput></screen>
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| 194 |
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[d4bafcc7] | 195 | <para>
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| 196 | Install <application>qtwebengine</application> by running the following
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| 197 | commands:
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| 198 | </para>
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[1d776f0b] | 199 |
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[2f3c55c5] | 200 | <screen><userinput>mkdir build &&
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| 201 | cd build &&
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[ceb3dc7] | 202 |
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[f806bbf2] | 203 | cmake -D CMAKE_MESSAGE_LOG_LEVEL=STATUS \
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[a7787e3] | 204 | -D QT_FEATURE_webengine_system_ffmpeg=ON \
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[f806bbf2] | 205 | -D QT_FEATURE_webengine_system_icu=ON \
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| 206 | -D QT_FEATURE_webengine_system_libevent=ON \
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| 207 | -D QT_FEATURE_webengine_proprietary_codecs=ON \
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| 208 | -D QT_FEATURE_webengine_webrtc_pipewire=ON \
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| 209 | -D QT_BUILD_EXAMPLES_BY_DEFAULT=OFF \
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| 210 | -G Ninja .. &&
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| 211 |
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| 212 | ninja</userinput></screen>
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[ceb3dc7] | 213 |
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| 214 | <para>
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| 215 | This package does not come with a test suite.
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| 216 | </para>
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| 217 |
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| 218 | <para>
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| 219 | Now, as the <systemitem class="username">root</systemitem> user:
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| 220 | </para>
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| 221 |
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[c28dcdf1] | 222 | <screen role="root"><userinput>ninja install</userinput></screen>
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[4eb513e] | 223 |
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[e847737] | 224 | <!-- EDITORS NOTE: If you are updating this package, use INSTALL_ROOT=
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[f806bbf2] | 225 | instead of DESTDIR= Not sure this is valid any more with version 6.6.2 -->
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[ceb3dc7] | 226 | </sect2>
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| 227 |
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| 228 | <sect2 role="commands">
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| 229 | <title>Command Explanations</title>
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| 230 |
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[c0f71f2] | 231 | <para>
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[f806bbf2] | 232 | <parameter>CMAKE_MESSAGE_LOG_LEVEL=STATUS</parameter>: Output
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| 233 | interesting messages that project users might be interested in.
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| 234 | Ideally these should be concise, no more than a single line,
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| 235 | but still informative.
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[55a55f1] | 236 | </para>
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| 237 |
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[d885388] | 238 | <para>
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[f806bbf2] | 239 | <parameter>QT_FEATURE_webengine_system_*</parameter>: Specify what
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| 240 | external packages the system should use.
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[d885388] | 241 | </para>
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| 242 |
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[ff00f810] | 243 | <para>
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[f806bbf2] | 244 | <parameter>QT_BUILD_EXAMPLES_BY_DEFAULT=OFF</parameter>: Do not build
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[5af8f488] | 245 | examples by default.
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[ff00f810] | 246 | </para>
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| 247 |
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[088e7e06] | 248 | <para>
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| 249 | <option>NINJAJOBS=4 make</option>: If you patched system ninja in LFS to
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| 250 | recognize the NINJAJOBS environment variable, this command will run system
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[8558044] | 251 | ninja with the specified number of jobs (i.e. 4).
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[d885388] | 252 | There are several reasons why you might want to use options like this this:
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[4eb513e] | 253 | </para>
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[d885388] | 254 |
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[5c7f2497] | 255 | <itemizedlist>
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| 256 | <listitem>
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[baac59c] | 257 | <para>
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| 258 | Building on a subset of CPUs allows measuring the build time
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[d885388] | 259 | for a smaller number of processors, and/or running other
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| 260 | CPU-intensive tasks at the same time. For an editor on a machine
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| 261 | with a lot of CPUs, trying to measure the build time for a 4-CPU
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| 262 | machine, <option>NINJAJOBS=4 make</option> will give a reasonable
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[70e458ba] | 263 | approximation (there is a short period where N+2 python and node
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[d885388] | 264 | jobs run).
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[baac59c] | 265 | </para>
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[5c7f2497] | 266 | </listitem>
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| 267 | <listitem>
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[baac59c] | 268 | <para>
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[d885388] | 269 | On a machine with only 4 CPUs online, the default of scheduling
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[c7ce2b46] | 270 | N+2 jobs for qtwebengine is slower by between 3% and 7%, probably
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[d885388] | 271 | because of the size of the C++ files and their many includes and
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| 272 | templates. Therefore, if in doubt set NINJAJOBS to the number of CPUs.
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[baac59c] | 273 | </para>
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[5c7f2497] | 274 | </listitem>
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| 275 | <listitem>
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[baac59c] | 276 | <para>
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| 277 | Reducing the number of cores being used on long running, CPU
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| 278 | intensive packages may alleviate heat problems.
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| 279 | </para>
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[5c7f2497] | 280 | </listitem>
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[00032e41] | 281 | <listitem>
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| 282 | <para>
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| 283 | Reducing the number of cores will prevent potential out-of-memory
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| 284 | problems on systems that do not have enough memory (or swap)
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[8558044] | 285 | when all cores are active. A suggested approach is to limit
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| 286 | the number of cores to about one core for each 1.5 GB of
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[00032e41] | 287 | combined RAM and swap space.
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| 288 | </para>
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| 289 | </listitem>
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[5c7f2497] | 290 | </itemizedlist>
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[ceb3dc7] | 291 |
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| 292 | </sect2>
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| 293 |
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[55a55f1] | 294 | <sect2 role="configuration">
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| 295 | <title>Configuring QtWebEngine</title>
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| 296 |
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| 297 | <sect3 id="qtwebengine-config">
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| 298 | <title>Configuration Information</title>
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| 299 |
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| 300 | <para>
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| 301 | If you are upgrading from an older minor version of this
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| 302 | application, for some webpages to load you may need to
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| 303 | clear the <emphasis>browser</emphasis> caches, e.g. for
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| 304 | <application>falkon</application> they will be found in
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| 305 | <filename class="directory">~/.cache/falkon/</filename>.
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| 306 | You will need to do this if the browser starts to render
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| 307 | the page and then changes to a blank tab with a message
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| 308 | that something went wrong, and a button to Retry. Even
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| 309 | after removing the old caches, you may need to retry a
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| 310 | few times for each affected tab.
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| 311 | </para>
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| 312 |
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[4eb513e] | 313 | <para>
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| 314 | If a browser using this package fails to run and when run
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| 315 | from a term it reports 'Trace/breakpoint trap' that is
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| 316 | probably a kernel configuration issue - there is no need
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| 317 | to rebuild QtWebEngine, see the next section, recompile
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| 318 | the kernel and reboot to the new kernel.
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| 319 | </para>
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| 320 |
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[55a55f1] | 321 | </sect3>
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| 322 |
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| 323 | </sect2>
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| 324 |
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[4eb513e] | 325 | <sect2 role="kernel" id="qtwebengine-kernel">
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| 326 | <title>Kernel Configuration</title>
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| 327 |
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| 328 | <para>
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[866d8e15] | 329 | This package does not require any of the optional kernel namespace items,
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| 330 | but if User namespace is enabled <phrase revision="systemd">(as happens
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| 331 | in some unit files, for hardening)</phrase> PID namespace must also be
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| 332 | enabled. In that case enable the following options in the kernel
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| 333 | configuration and recompile the kernel if necessary:
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[4eb513e] | 334 | </para>
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| 335 |
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[cddcdb14] | 336 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 337 | href="qtwebengine-kernel.xml"/>
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[4eb513e] | 338 |
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| 339 | <indexterm zone="qtwebengine qtwebengine-kernel">
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| 340 | <primary sortas="d-qtwebengine">qtwebengine</primary>
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| 341 | </indexterm>
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| 342 | </sect2>
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[55a55f1] | 343 |
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[ceb3dc7] | 344 | <sect2 role="content">
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| 345 | <title>Contents</title>
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| 346 |
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| 347 | <segmentedlist>
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| 348 | <segtitle>Installed Programs</segtitle>
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| 349 | <segtitle>Installed Libraries</segtitle>
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| 350 | <segtitle>Installed Directories</segtitle>
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| 351 |
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| 352 | <seglistitem>
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| 353 | <seg>
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[8558044] | 354 | qtwebengine_convert_dict and
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[f806bbf2] | 355 | QtWebEngineProcess (both in $QT6DIR/libexec)
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[ceb3dc7] | 356 | </seg>
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| 357 | <seg>
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[f806bbf2] | 358 | libQt6Pdf.so,
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| 359 | libQt6PdfQuick.so,
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| 360 | libQt6PdfWidgets.so,
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| 361 | libQt6WebEngineCore.so,
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| 362 | libQt6WebEngineiQuick.so,
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| 363 | libQt6WebEngineQuickDelegatesQml.so, and
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| 364 | libQt6WebEngineWidgets.so
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[ceb3dc7] | 365 | </seg>
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| 366 | <seg>
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[f806bbf2] | 367 | $QT6DIR/include/QtPdf,
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| 368 | $QT6DIR/include/QtPdfQuick,
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| 369 | $QT6DIR/include/QtPdfWidgets,
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| 370 | $QT6DIR/include/QtWebEngineCore,
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| 371 | $QT6DIR/include/QtWebEngineQuick,
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| 372 | $QT6DIR/include/QtWebEngineWidgets,
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| 373 | $QT6DIR/qml/QtWebEngine, and
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| 374 | $QT6DIR/translations/qtwebengine_locales
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[ceb3dc7] | 375 | </seg>
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| 376 | </seglistitem>
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| 377 | </segmentedlist>
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| 378 |
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| 379 | <variablelist>
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| 380 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 381 | <?dbfo list-presentation="list"?>
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| 382 | <?dbhtml list-presentation="table"?>
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| 383 |
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| 384 | <varlistentry id="qtwebengine_convert_dict">
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| 385 | <term><command>qtwebengine_convert_dict</command></term>
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| 386 | <listitem>
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| 387 | <para>
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| 388 | converts hunspell dictionaries (<literal>.dic</literal>) to chromium
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| 389 | format (<literal>.bdic</literal>)
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| 390 | </para>
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| 391 | <indexterm zone="qtwebengine qtwebengine_convert_dict">
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| 392 | <primary sortas="b-qtwebengine_convert_dict">qtwebengine_convert_dict</primary>
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| 393 | </indexterm>
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| 394 | </listitem>
|
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| 395 | </varlistentry>
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| 396 |
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| 397 | <varlistentry id="QtWebEngineProcess">
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| 398 | <term><command>QtWebEngineProcess</command></term>
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| 399 | <listitem>
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| 400 | <para>
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| 401 | is a libexec program which runs a zygote process (one that listens
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| 402 | for spawn requests from a master process and will fork itself in
|
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[4c24eb0a] | 403 | response)
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[ceb3dc7] | 404 | </para>
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| 405 | <indexterm zone="qtwebengine QtWebEngineProcess">
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| 406 | <primary sortas="b-QtWebEngineProcess">QtWebEngineProcess</primary>
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| 407 | </indexterm>
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| 408 | </listitem>
|
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| 409 | </varlistentry>
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[f806bbf2] | 410 | <!--
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[ceb3dc7] | 411 | <varlistentry id="libQtWebEngine-lib">
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| 412 | <term><filename class="libraryfile">libQtWebEngine.so</filename></term>
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| 413 | <listitem>
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| 414 | <para>
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[4c24eb0a] | 415 | provides QML types for rendering web content within a QML application
|
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[ceb3dc7] | 416 | </para>
|
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| 417 | <indexterm zone="qtwebengine libQtWebEngine-lib">
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| 418 | <primary sortas="c-libQtWebEngine">libQtWebEngine.so</primary>
|
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| 419 | </indexterm>
|
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| 420 | </listitem>
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| 421 | </varlistentry>
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| 422 |
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| 423 | <varlistentry id="libQtWebEngineCore">
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| 424 | <term><filename class="libraryfile">libQtWebEngineCore.so</filename></term>
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| 425 | <listitem>
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| 426 | <para>
|
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[4c24eb0a] | 427 | provides public API shared by both QtWebEngine and QtWebEngineWidgets
|
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[ceb3dc7] | 428 | </para>
|
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| 429 | <indexterm zone="qtwebengine libQtWebEngineCore">
|
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| 430 | <primary sortas="c-libQtWebEngineCore">libQtWebEngineCore.so</primary>
|
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| 431 | </indexterm>
|
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| 432 | </listitem>
|
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| 433 | </varlistentry>
|
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| 434 |
|
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| 435 | <varlistentry id="libQtWebEngineWidgets">
|
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| 436 | <term><filename class="libraryfile">libQtWebEngineWidgets.so</filename></term>
|
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| 437 | <listitem>
|
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| 438 | <para>
|
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| 439 | provides a web browser engine as well as C++ classes to render and
|
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[4c24eb0a] | 440 | interact with web content
|
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[ceb3dc7] | 441 | </para>
|
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| 442 | <indexterm zone="qtwebengine libQtWebEngineWidgets">
|
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| 443 | <primary sortas="c-libQtWebEngineWidgets">libQtWebEngineWidgets.so</primary>
|
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| 444 | </indexterm>
|
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| 445 | </listitem>
|
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| 446 | </varlistentry>
|
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[f806bbf2] | 447 | -->
|
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[ceb3dc7] | 448 | </variablelist>
|
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| 449 | </sect2>
|
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[4c24eb0a] | 450 |
|
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[ceb3dc7] | 451 | </sect1>
|
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