环境
Debian GNU / Linux 7.8（简述）Linux marvin 3.16-0.bpo.2-amd64 #1 SMP Debian 3.16.3-2~bpo70+1 (2014-09-21) x86_64 GNU/Linux
树莓派2
Yocto Poky
Qt5
我的目标是在RPi2上运行Chromium布局Web引擎
我希望能够在我的RPi2上运行它：
import QtQuick 2.1
import QtQuick.Controls 1.1
import QtWebEngine 1.0
ApplicationWindow {
width: 1280
height: 720
visible: true
WebEngineView {
id: webview
url: "http://www.qt-project.org"
anchors.fill: parent
}
}
我如何创建RPi2图像
我已经使用Yocto使用this unique and amazing tutorial in portuguese和this one in english为RPi2成功创建了图像。
在几行之后，我如何能够为我的RPi2生成图像
mkdir -p ~/yocto/dl
cd ~/yocto
git clone -b dizzy git://git.yoctoproject.org/poky poky-dizzy
cd poky-dizzy
git clone git://git.yoctoproject.org/meta-raspberrypi
git clone -b dizzy https://github.com/meta-qt5/meta-qt5.git
git clone -b dizzy git://git.openembedded.org/meta-openembedded
git clone -b dizzy https://bitbucket.org/embarcados/meta-embarcados.git
然后
cd ~/yocto
. poky-dizzy/oe-init-build-env build-dizzy
bitbake qt5-image-demo
几个小时后，我可以选择生成的图像
~/yocto/build-dizzy/tmp/deploy/images/raspberrypi2/qt5-image-demo-raspberrypi2.rpi-sdimg...并复制到microSD卡，例如
dd if=~/yocto/build-dizzy/tmp/deploy/images/raspberrypi2/qt5-image-demo-raspberrypi2.rpi-sdimg of=/dev/sdbX bs=4M
问题：未安装QtWebEngine
...但是当我尝试运行此simple QtWebEngine example时，出现错误，提示未安装QtWebEngine：
root@raspberrypi2:~# /usr/bin/qt5/qmlscene qb.qml -platform eglfs
file:///home/root/qb.qml:3 module "QtWebEngine" is not installed
...所以我在我的bitbake映像配置中添加了QtWebEngine recipe并运行了
in my image configurationvi ../poky-dizzy/meta-embarcados/meta-rpi/recipes-core/images/qt5-image-demo.bbappend
IMAGE_INSTALL += "\
packagegroup-qt5-machine-related \
apt \
openssh \
qtwebengine \ => /usr/lib/qt5/libexec/QtWebEngineProcess
qtwebengine-qmlplugins \ => /usr/lib/qt5/qml/QtWebEngine
"
错误-
RESOLVED~/yocto/build-dizzy$ bitbake qt5-image-demo
WARNING: Host distribution "Debian-7.8" has not been validated with this version of the build system; you may possibly experience unexpected failures. It is recommended that you use a tested distribution.
Loading cache: 100% |##########################################################################################################################################################################################| ETA: 00:00:00
Loaded 1952 entries from dependency cache.
NOTE: Resolving any missing task queue dependencies
Build Configuration:
BB_VERSION = "1.24.0"
BUILD_SYS = "x86_64-linux"
NATIVELSBSTRING = "Debian-7.8"
TARGET_SYS = "arm-poky-linux-gnueabi"
MACHINE = "raspberrypi2"
DISTRO = "poky"
DISTRO_VERSION = "1.7.2"
TUNE_FEATURES = "arm armv7a vfp thumb neon callconvention-hard vfpv4 cortexa7"
TARGET_FPU = "vfp-vfpv4-neon"
meta-embarcados
meta-rpi = "dizzy:821ba371852d2aa86bc71d75918df37a21d264ad"
meta-raspberrypi = "master:6ef9d94a2c2588dcefe442577ef6ae5bbe722dec"
meta-qt5 = "dizzy:adeca0db212d61a933d7952ad44ea1064cfca747"
meta-oe = "dizzy:5b6f39ce325d490fc382d5d59c5b8b9d5fa38b38"
meta
meta-yocto = "dizzy:9c4ff467f66428488b1cd9798066a8cb5d6b4c3b"
meta-ruby = "dizzy:5b6f39ce325d490fc382d5d59c5b8b9d5fa38b38"
NOTE: Preparing runqueue
NOTE: Executing SetScene Tasks
NOTE: Executing RunQueue Tasks
WARNING: Failed to fetch URL git://code.qt.io/qt/qtwebengine.git;branch=1.0, attempting MIRRORS if available
ERROR: Fetcher failure: Unable to find revision 21f6ce84ecca9a4ff2aa980b21d2e5174c78d14b in branch 1.0 even from upstream
ERROR: Function failed: Fetcher failure for URL: 'git://code.qt.io/qt/qtwebengine.git;branch=1.0'. Unable to fetch URL from any source.
ERROR: Logfile of failure stored in: /home/otto/yocto/build-dizzy/tmp/work/cortexa7t2hf-vfp-vfpv4-neon-poky-linux-gnueabi/qtwebengine/5.3.2-r0/temp/log.do_fetch.16064
ERROR: Task 634 (/home/otto/yocto/build-dizzy/../poky-dizzy/meta-qt5/recipes-qt/qt5/qtwebengine_5.3.2+git.bb, do_fetch) failed with exit code '1'
NOTE: Tasks Summary: Attempted 3306 tasks of which 3305 didn't need to be rerun and 1 failed.
No currently running tasks (1955 of 3321)
Summary: 1 task failed:
/home/otto/yocto/build-dizzy/../poky-dizzy/meta-qt5/recipes-qt/qt5/qtwebengine_5.3.2+git.bb, do_fetch
Summary: There were 2 WARNING messages shown.
Summary: There were 2 ERROR messages shown, returning a non-zero exit code.
日志
~/yocto/build-dizzy$ tail /home/otto/yocto/build-dizzy/tmp/work/cortexa7t2hf-vfp-vfpv4-neon-poky-linux-gnueabi/qtwebengine/5.3.2-r0/temp/log.do_fetch.16064
DEBUG: Running export PATH="/home/otto/yocto/build-dizzy/tmp/sysroots/x86_64-linux/usr/bin/qt5:/home/otto/yocto/build-dizzy/tmp/sysroots/x86_64-linux/usr/bin/python-native:/home/otto/yocto/build-dizzy/tmp/sysroots/x86_64-linux/usr/bin/perl-native:/home/otto/yocto/poky-dizzy/scripts:/home/otto/yocto/build-dizzy/tmp/sysroots/x86_64-linux/usr/bin/arm-poky-linux-gnueabi:/home/otto/yocto/build-dizzy/tmp/sysroots/raspberrypi2/usr/bin/crossscripts:/home/otto/yocto/build-dizzy/tmp/sysroots/x86_64-linux/usr/sbin:/home/otto/yocto/build-dizzy/tmp/sysroots/x86_64-linux/usr/bin:/home/otto/yocto/build-dizzy/tmp/sysroots/x86_64-linux/sbin:/home/otto/yocto/build-dizzy/tmp/sysroots/x86_64-linux/bin:/home/otto/yocto/poky-dizzy/scripts:/home/otto/yocto/poky-dizzy/bitbake/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games"; export HOME="/home/otto"; /usr/bin/env wget -t 2 -T 30 -nv --passive-ftp --no-check-certificate -P /home/otto/yocto/build-dizzy/../dl 'http://sources.openembedded.org/git2_code.qt.io.qt.qtwebengine.git.tar.gz'
DEBUG: Mirror fetch failure for url http://sources.openembedded.org/git2_code.qt.io.qt.qtwebengine.git.tar.gz (original url: git://code.qt.io/qt/qtwebengine.git;branch=1.0)
DEBUG: Fetcher failure: Fetch command failed with exit code 8, output:
http://sources.openembedded.org/git2_code.qt.io.qt.qtwebengine.git.tar.gz:
2015-05-24 03:12:49 ERROR 404: Not Found.
ERROR: Fetcher failure: Unable to find revision 21f6ce84ecca9a4ff2aa980b21d2e5174c78d14b in branch 1.0 even from upstream
DEBUG: Python function base_do_fetch finished
DEBUG: Python function do_fetch finished
ERROR: Function failed: Fetcher failure for URL: 'git://code.qt.io/qt/qtwebengine.git;branch=1.0'. Unable to fetch URL from any source.
确实，这给了我404，这就是我的问题
http://sources.openembedded.org/git2_code.qt.io.qt.qtwebengine.git.tar.gz`
但我检查了一下，它有效
git clone git://code.qt.io/qt/qtwebengine.git;branch=1.0git://code.qt.io/qt/qtwebengine.git;branch=1.0`
没人知道如何解决这个问题吗？
事实上，我对QtWebKit有相同的问题
更新-编译
PASS-如何运行QtWebEngine？解决了QtWebEngine的编译/安装部分。我能够编译QtWebEngine
/usr/lib/qt5/libexec/QtWebEngineProcess。简单的QML脚本仍然找不到QtWebEngine，我想这是我无法生成的/usr/lib/qt5/qml/QtWebEngine。QML不是硬性要求。我只需要能够编译并运行一个非常简单的Qt5应用程序，该应用程序就会加载具有Chromium Layout Engine功能的Web页面，因此需要QtWebEngine。
更新添加了QtWebEngine QML插件-无法确定导入版本
root@raspberrypi2:~# /usr/bin/qt5/qmlscene --platform eglfs chromium.qml
file:///home/root/chromium.qml:3 module "QtWebEngine" version 1.0 is not installed
安装了QtWebEngine文件
root@raspberrypi2:/usr/lib/qt5# find . -name *ngine*
./qml/QtWebEngine
./qml/QtWebEngine/experimental/libqtwebengineexperimentalplugin.so
./qml/QtWebEngine/libqtwebengineplugin.so
./plugins/iconengines
./plugins/mediaservice/libqtmedia_audioengine.so
./plugins/qtwebengine
./libexec/QtWebEngineProcess
看起来像是0.9版
root@raspberrypi2:~# ls -al /usr/lib/libQt0Web*
lrwxrwxrwx 1 root root 24 Jun 5 09:16 /usr/lib/libQt0WebEngine.so.0 -> libQt0WebEngine.so.0.9.0
lrwxrwxrwx 1 root root 24 Jun 5 09:16 /usr/lib/libQt0WebEngine.so.0.9 -> libQt0WebEngine.so.0.9.0
-rwxr-xr-x 1 root root 112744 May 24 19:04 /usr/lib/libQt0WebEngine.so.0.9.0
lrwxrwxrwx 1 root root 28 Jun 5 09:16 /usr/lib/libQt0WebEngineCore.so.0 -> libQt0WebEngineCore.so.0.9.0
lrwxrwxrwx 1 root root 28 Jun 5 09:16 /usr/lib/libQt0WebEngineCore.so.0.9 -> libQt0WebEngineCore.so.0.9.0
-rwxr-xr-x 1 root root 32914884 May 24 19:04 /usr/lib/libQt0WebEngineCore.so.0.9.0
lrwxrwxrwx 1 root root 31 Jun 5 09:16 /usr/lib/libQt0WebEngineWidgets.so.0 -> libQt0WebEngineWidgets.so.0.9.0
lrwxrwxrwx 1 root root 31 Jun 5 09:16 /usr/lib/libQt0WebEngineWidgets.so.0.9 -> libQt0WebEngineWidgets.so.0.9.0
-rwxr-xr-x 1 root root 73976 May 24 19:04 /usr/lib/libQt0WebEngineWidgets.so.0.9.0
将导入版本更改为0.9
import QtWebEngine 0.9现在出现其他错误，但是空白（白色然后红色）的画布正在打开
root@raspberrypi2:~# /usr/bin/qt5/qmlscene --platform eglfs chromium.qml
[0605/112518:ERROR:resource_bundle.cc(607)] Failed to load /usr/share/qt5/qtwebengine_resources.pak
Some features may not be available.
[0605/112518:WARNING:resource_bundle.cc(280)] locale_file_path.empty()
[0605/112518:WARNING:proxy_service.cc(890)] PAC support disabled because there is no system implementation
[0605/112518:ERROR:resource_bundle.cc(607)] Failed to load /usr/share/qt5/qtwebengine_resources.pak
Some features may not be available.
[0605/112518:WARNING:resource_bundle.cc(280)] locale_file_path.empty()
确实不存在
.pak文件root@raspberrypi2:/usr/share/qt5# ls -al
drwxr-xr-x 4 root root 1024 Jun 5 09:27 .
drwxr-xr-x 29 root root 1024 May 22 15:21 ..
drwxr-xr-x 40 root root 1024 Jun 5 09:16 examples
drwx------ 3 root root 1024 Jun 5 09:27 translations
没有QtWebEngine
plugins.qmltypes（？）root@raspberrypi2:~# find /usr/lib -name plugins.qmltypes
/usr/lib/qt5/qml/QtQuick.2/plugins.qmltypes
/usr/lib/qt5/qml/QtMultimedia/plugins.qmltypes
/usr/lib/qt5/qml/Qt/labs/settings/plugins.qmltypes
/usr/lib/qt5/qml/Qt/labs/folderlistmodel/plugins.qmltypes
/usr/lib/qt5/qml/Qt/WebSockets/plugins.qmltypes
/usr/lib/qt5/qml/QtServiceFramework/plugins.qmltypes
/usr/lib/qt5/qml/Qt3D/plugins.qmltypes
/usr/lib/qt5/qml/Qt3D/Shapes/plugins.qmltypes
/usr/lib/qt5/qml/QtLocation/plugins.qmltypes
/usr/lib/qt5/qml/QtPositioning/plugins.qmltypes
/usr/lib/qt5/qml/Enginio/plugins.qmltypes
/usr/lib/qt5/qml/QtQuick/LocalStorage/plugins.qmltypes
/usr/lib/qt5/qml/QtQuick/Controls/plugins.qmltypes
/usr/lib/qt5/qml/QtQuick/Layouts/plugins.qmltypes
/usr/lib/qt5/qml/QtQuick/Particles.2/plugins.qmltypes
/usr/lib/qt5/qml/QtQuick/XmlListModel/plugins.qmltypes
/usr/lib/qt5/qml/QtQuick/Window.2/plugins.qmltypes
/usr/lib/qt5/qml/QtQuick/Dialogs/plugins.qmltypes
/usr/lib/qt5/qml/QtQuick/PrivateWidgets/plugins.qmltypes
/usr/lib/qt5/qml/QtSensors/plugins.qmltypes
/usr/lib/qt5/qml/QtNfc/plugins.qmltypes
/usr/lib/qt5/qml/QtSystemInfo/plugins.qmltypes
/usr/lib/qt5/qml/QtPublishSubscribe/plugins.qmltypes
/usr/lib/qt5/qml/QtTest/plugins.qmltypes
/usr/lib/qt5/qml/QtBluetooth/plugins.qmltypes
包装
otto@marvin:~/yocto/build-dizzy$ find . -name packages-split | grep webengine
./tmp/work/cortexa7t2hf-vfp-vfpv4-neon-poky-linux-gnueabi/qtwebengine/5.3.2-r0/packages-split
在我的构建机器上
otto@marvin:~/yocto/build-dizzy$ find . -name qtwebengine_resources.pak
./tmp/work/cortexa7t2hf-vfp-vfpv4-neon-poky-linux-gnueabi/qtwebengine/5.3.2-r0/packages-split/qtwebengine-dev/usr/share/qt5/qtwebengine_resources.pak
./tmp/work/cortexa7t2hf-vfp-vfpv4-neon-poky-linux-gnueabi/qtwebengine/5.3.2-r0/image/usr/share/qt5/qtwebengine_resources.pak
./tmp/work/cortexa7t2hf-vfp-vfpv4-neon-poky-linux-gnueabi/qtwebengine/5.3.2-r0/package/usr/share/qt5/qtwebengine_resources.pak
./tmp/work/cortexa7t2hf-vfp-vfpv4-neon-poky-linux-gnueabi/qtwebengine/5.3.2-r0/git/src/core/Release/gen/repack/qtwebengine_resources.pak
./tmp/work/cortexa7t2hf-vfp-vfpv4-neon-poky-linux-gnueabi/qtwebengine/5.3.2-r0/sysroot-destdir/usr/share/qt5/qtwebengine_resources.pak
./tmp/sysroots/raspberrypi2/usr/share/qt5/qtwebengine_resources.pak
Simple QML QtWebEngine not showing web page QUESTION on Stackoverflow
最佳答案
如果您查看回购库git：//code.qt.io/qt/qtwebengine.git，您会看到没有名为1.0的分支，这是您的bitbake日志指出的内容：
ERROR: Fetcher failure: Unable to find revision 21f6ce84ecca9a4ff2aa980b21d2e5174c78d14b in branch 1.0 even from upstream
如果我们克隆qtwebengine存储库，并运行以下命令，我们将了解哪个分支包含该提交。
$ git branch -r --contains 21f6ce84ecca9a4ff2aa980b21d2e5174c78d14b
origin/5.4
origin/5.4.2
origin/5.5
origin/5.5.0
origin/HEAD -> origin/5.5
origin/dev
因此，该提交在5.4分支上可用。
看一下
qtwebengine_5.3.2ǵit.bb中的meta-qt5配方，我们将在配方中看到以下行：QT_MODULE_BRANCH = "1.0"
这行将决定从上面的存储库中检出哪个分支。
尝试在自己的图层中添加
qtwebengine_5.3.2+git.bbappend，在其中添加：QT_MODULE_BRANCH = "5.4"
之后，您至少应该能够获取请求的SHA1。这似乎是元数据中的错误。
注意：我尚未在头晕的分支上对此进行构建测试。