Unsolved Installing Qt 5 on Debian

[kanito73]

Hello

I want to install Qt 5 on my brand new Debian 10 but I'm a bit confused. There is an online linux installer on this site and there are many qt5* packages available on the Debian repository and they are a lot. What is the best way to install Qt 5 on Debian? I guess that the best one is to use the online installer but am afraid that it could affect my current installation (KDE).

These are the available packages for installation:
(note that already most libqt5* packages are already installed by default required by KDE)

qt5-assistant
qt5-default
qt5-doc
qt5-doc-html
qt5-flatpak-platformtheme
qt5-gtk-platformtheme
qt5-gtk2-platformtheme
qt5-image-formats-plugins
qt5-qmake
qt5-qmake-bin
qt5-qmltooling-plugins
qt5-quick-demos
qt5-style-kvantum
qt5-style-kvantum-l10n
qt5-style-kvantum-themes
qt5-style-plugin-cleanlooks
qt5-style-plugin-motif
qt5-style-plugin-plastique
qt5-style-plugins
qt5-xdgdesktopportal-platformtheme
qt5ct
qt5dxcb-plugin
qt5keychain-dev
qt5qevercloud-dev
qt5serialport-examples

libqt53danimation5
libqt53dcore5
libqt53dextras5
libqt53dinput5
libqt53dlogic5
libqt53dquick5
libqt53dquickanimation5
libqt53dquickextras5
libqt53dquickinput5
libqt53dquickrender5
libqt53dquickscene2d5
libqt53drender5
libqt5bluetooth5
libqt5bluetooth5-bin
libqt5charts5
libqt5charts5-dev
libqt5concurrent5
libqt5core5a
libqt5datavisualization5
libqt5datavisualization5-dev
libqt5dbus5
libqt5designer5
libqt5designercomponents5
libqt5gamepad5
libqt5gamepad5-dev
libqt5glib-2.0-0
libqt5gstreamer-1.0-0
libqt5gstreamer-dev
libqt5gstreamerquick-1.0-0
libqt5gstreamerui-1.0-0
libqt5gstreamerutils-1.0-0
libqt5gui5
libqt5gui5-gles
libqt5help5
libqt5hunspellinputmethod5
libqt5keychain1
libqt5location5
libqt5location5-plugins
libqt5multimedia5
libqt5multimedia5-plugins
libqt5multimediagsttools5
libqt5multimediaquick5
libqt5multimediawidgets5
libqt5network5
libqt5networkauth5
libqt5networkauth5-dev
libqt5nfc5
libqt5opengl5
libqt5opengl5-dev
libqt5pas-dev
libqt5pas1
libqt5positioning5
libqt5positioning5-plugins
libqt5positioningquick5
libqt5printsupport5
libqt5qevercloud3
libqt5qml5
libqt5quick5
libqt5quickcontrols2-5
libqt5quickparticles5
libqt5quickshapes5
libqt5quicktemplates2-5
libqt5quicktest5
libqt5quickwidgets5
libqt5scintilla2-designer
libqt5script5
libqt5scripttools5
libqt5scxml5
libqt5scxml5-bin
libqt5scxml5-dev
libqt5sensors5
libqt5sensors5-dev
libqt5serialbus5
libqt5serialbus5-bin
libqt5serialbus5-dev
libqt5serialbus5-plugins
libqt5serialport5
libqt5serialport5-dev
libqt5sql5
libqt5sql5-ibase
libqt5sql5-mysql
libqt5sql5-odbc
libqt5sql5-psql
libqt5sql5-sqlite
libqt5sql5-tds
libqt5svg5
libqt5svg5-dev
libqt5test5
libqt5texttospeech5
libqt5texttospeech5-dev
libqt5virtualkeyboard5
libqt5virtualkeyboard5-dev
libqt5waylandclient5
libqt5waylandclient5-dev
libqt5waylandcompositor5
libqt5waylandcompositor5-dev
libqt5webchannel5
libqt5webchannel5-dev
libqt5webengine-data
libqt5webengine5
libqt5webenginecore5
libqt5webenginewidgets5
libqt5webkit5
libqt5webkit5-dev
libqt5websockets5
libqt5websockets5-dev
libqt5webview5
libqt5webview5-dev
libqt5widgets5
libqt5x11extras5
libqt5x11extras5-dev
libqt5xdg-dev
libqt5xdg3
libqt5xdgiconloader-dev
libqt5xdgiconloader3
libqt5xml5
libqt5xmlpatterns5
libqt5xmlpatterns5-dev

[Edit: Put the long list in code tags ~kshegunov]

[kshegunov]

I want to install Qt 5 on my brand new Debian 10

That's debian stable? Do you intend to develop with Qt?

If you only want the client binaries, then stick to what the repo gives you. If you want to develop with Qt, then you'd probably want the online installer from the QtC website. The stable flavor debian comes with somewhat outdated versions of Qt. If you decide to stick to what the repo has, then you need the libqt5*-dev packages to pull the headers for development.

[SGaist]

Hi,

To add to @kshegunov, unless you try to mess with your system installed libraries, you will not have troubles. The online installer proposes by default either your home folder or /opt which is outside what your system uses by default for loading system libraries.

[kanito73]

@kshegunov I am planning to develop... Then it will be better to use the online installer... Does it setup the system to the new (online) Qt paths to binaries and libraries or I must do it manually? Thanks!

[SGaist]

No, your system is left untouched. If you use Qt Creator, that handling will be done for you.

If you want to develop in a terminal, use the full path to the tools.

[kanito73]

@SGaist I will try the online installer then... Does it fix the system paths to the new Qt binaries and libraries or just downloads the files and I must set them manually? Thanks!

[kshegunov]

@kanito73 said in Installing Qt 5 on Debian:

@kshegunov I am planning to develop... Then it will be better to use the online installer...

I guess.

Does it setup the system to the new (online) Qt paths to binaries and libraries or I must do it manually? Thanks!

None of the above. The installer doesn't touch system paths, and it really shouldn't. As @SGaist said it's up to qmake to set it up for you, so using the correct qmake binary, assumedly configured in QtCreator' kits is enough to get you started.