Building QGroundControl Failed on JetsonNX.

Muhammad Salem

in the source and builds section related to QGroundControl, it is recommended to install Qt-5.15.2. I tried the online installer on Jetson NX it didn't work, maybe there is a problem with ARM-arch. So, I tried to build Qt-5.15.2. using the commands in the post.

SGaist

Hence my question about the distribution.
It may already provide Qt 5.15.

The online installer is built for the x86_64 platform thus you cannot run it on ARM.

Muhammad Salem

@SGaist
I think that neither Qt nor an ARM build of QGroundControl are provided (i didn't find any).

SGaist

That was not my question.

Which distribution are you using on your Jetson ?

Muhammad Salem

@SGaist
My jetson has jetpack 6.1 on it. the Qt's version provided by the jetpack is a version earlier than 5.15.2 (i don't recall the exact version) and I didn't find qmake on my jetson.

So, I tried to build Qt 5.15.2.

SGaist

You have to install qmake using the package manager if you want to use the Qt version from your distribution. You will also need to install the dev packages of the Qt modules you will use.

That said, to build Qt, you should install the build dependencies of the modules you want to build. This can be done using apt.

Muhammad Salem

@SGaist
I tried to build QGroundControl using Qt-5.9.1 which comes with the Jetpack. QGroundControl doesn't allow any Qt version less than 5.10 to build it.

I installed the required packages form the package manager and successfully built QGroundControl.

your help is appreciated.

SGaist

Isn't there a more recent version of JetPack ?

One thing to do is to install the builddep of the modules you want to build and then start from scratch.

Muhammad Salem

@SGaist
the latest version of Jetpack is 5.0.2/ubuntu20. I currently use Jetpack 4.6.3/Ubuntu18 because remote desktop connection didn't work well for me when i tried the latest version.

I tried to build QGroundControl form source again on a fresh jetpack 4.6.3 installation with Qt-5.15.2 and i stumbled upon a new errors, i think there is some problem with the private headers.

I got this error when i tried to use make in the build folder in QGroundControl

compiling /home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/QGCTileCacheWorker.cpp
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/QGCTileCacheWorker.cpp: In member function ‘void QGCCacheWorker::_lookupReady(QHostInfo)’:
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/QGCTileCacheWorker.cpp:1185:27: error: expected type-specifier before ‘QTcpSocket’
         auto socket = new QTcpSocket();
                           ^~~~~~~~~~
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/QGCTileCacheWorker.cpp:1190:26: error: ‘QTcpSocket’ has not been declared
         connect(socket, &QTcpSocket::connected, this, [this, socket] {
                          ^~~~~~~~~~
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/QGCTileCacheWorker.cpp: In lambda function:
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/QGCTileCacheWorker.cpp:1193:13: error: ‘socket’ is not captured
             socket->deleteLater();
             ^~~~~~
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/QGCTileCacheWorker.cpp:1190:68: note: the lambda has no capture-default
         connect(socket, &QTcpSocket::connected, this, [this, socket] {
                                                                    ^
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/QGCTileCacheWorker.cpp:1185:14: note: ‘<typeprefixerror>socket’ declared here
         auto socket = new QTcpSocket();
              ^~~~~~
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/QGCTileCacheWorker.cpp: In lambda function:
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/QGCTileCacheWorker.cpp:1198:13: error: ‘socket’ is not captured
             socket->deleteLater();
             ^~~~~~
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/QGCTileCacheWorker.cpp:1195:77: note: the lambda has no capture-default
 connect(socket, &QAbstractSocket::errorOccurred, this, [this, socket](QAbstractSocket::SocketError error) {
                                                                     ^
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/QGCTileCacheWorker.cpp:1185:14: note: ‘<typeprefixerror>socket’ declared here
         auto socket = new QTcpSocket();

i added #include <QTcpSocket> to QGCTileCacheWorker.cpp then i got this new error

compiling /home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/MapProvider.cpp
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/MapProvider.cpp: In constructor ‘MapProvider::MapProvider(const QString&, const QString&, quint32, QGeoMapType::MapStyle, QObject*)’:
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/MapProvider.cpp:23:40: error: incomplete type ‘QLocale’ used in nested name specifier
     const QStringList langs = QLocale::system().uiLanguages();

i added #include <QLocale> to MapProvider.cpp then i got this new error

compiling /home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/GoogleMapProvider.cpp
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/GoogleMapProvider.cpp: In member function ‘void GoogleMapProvider::_tryCorrectGoogleVersions(QNetworkAccessManager*)’:
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/GoogleMapProvider.cpp:108:27: error: variable ‘QSslConfiguration conf’ has initializer but incomplete type
         QSslConfiguration conf = qheader.sslConfiguration();
                           ^~~~
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/GoogleMapProvider.cpp:108:42: error: ‘class QNetworkRequest’ has no member named ‘sslConfiguration’; did you mean ‘http2Configuration’?
         QSslConfiguration conf = qheader.sslConfiguration();
                                          ^~~~~~~~~~~~~~~~
                                          http2Configuration
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/GoogleMapProvider.cpp:109:32: error: ‘QSslSocket’ has not been declared
         conf.setPeerVerifyMode(QSslSocket::VerifyNone);
                                ^~~~~~~~~~
/home/vortex/Documents/qgroundcontrol/src/QtLocationPlugin/GoogleMapProvider.cpp:110:17: error: ‘class QNetworkRequest’ has no member named ‘setSslConfiguration’; did you mean ‘http2Configuration’?
         qheader.setSslConfiguration(conf);
                 ^~~~~~~~~~~~~~~~~~~
                 http2Configuration

i have no idea what to do here, i tried adding #include <QSslConfiguration> , #include <QSslSocket> and #include <QNetworkRequest> to GoogleMapProvider.cpp but adding those includes didn't do anything.

SGaist

How did you install Qt ?
Which packages exactly ?

I tested the build on macOS with 5.15.2 as well and it went fine.

Muhammad Salem

@SGaist
I installed Qt using the following commands

wget http://master.qt.io/archive/qt/5.15/5.15.2/single/qt-everywhere-src-5.15.2.tar.xz
tar -xpf qt-everywhere-src-5.15.2.tar.xz
cd qt-everywhere-src-5.15.2/
./configure -xcb -skip qtwebengine
make -j4
sudo make install

the problem is no more, apparently you need to build Qt with ssl support . i just installed libssl and built Qt again. Everything works fine now.

Thank you.