Installation and Deployment

@Axel-Spoerl said in Raspberry Pi 4 touchscreen with Qt5.15 embedded is not working:

No, I have no more ideas.

I found that "-plugin tslib" touchscreen works.
"export QT_QPA_FB_TSLIB=1" does not work.
If I write "root@pi:~# /home/pi/Qt_Projects/kiab/kia -plugin tslib" then the touchscreen works.

@jsulm
I wrote

If you installed the open source that means you will have to build Qt?

Note the question mark at the end, indicating that I was uncertain that is what they wanted/needed? But I understand now :)

@Jhonadam11 Get out of here with these AI generated responses.

I'd just flag their account, but I don't have the 2 rep required as this is my first post.

I managed to download the mobile library using another mirror. Thanks for the advice. However, when I try to run QtDesignStudio I get the following error:

"Runtime Error! R6034 An application has made an attempt to load the C runtime library incorrectly. Please contact the application's support team for more information."

But when I dismiss the error message the DesignStudio seems to run normally.

Solution to remove the licence may depend what platform you are on....

Hi, the culprit might be that $(QTDIR)\lib you added as a linker additional dependency, so even though that directory does not contain any *.lib files (only the subdirectories do) the linker adds that as a dummy .lib file anyway (note: just a guess :-)

Hi and welcome to devnet,

Silly question but: do you have that library there ?

@Alfredy said in Problem connecting mysql to my qt application under linux:

How do I download this?

If you search for "mysql client library" you will find https://dev.mysql.com/downloads/c-api/
But it looks like you're on Linux, in that case install the package containing MySQL client library (on Ubuntu it's libmysqlclient21).

I mean the mirror used by the installer to get its data and packages. See here.

No, there should not be that big a difference between these two minor release. A module can be a TP but in that case, it's clearly noted as such

Assuming you run configure in qt source directory, you can specify QMAKEFEATURES like this:

@Ronel_qtmaster
The OP asked for Qt 5.15.15, you show version up to 5.15.2.

Be aware too that recently there was a long discussions where apparently versions like 5.15.x seemed to be available for download to some people but not others, perhaps depending on their platform. I don't know whether anyone figured out definitively what was going on.

You need to run the installer from the command line and switch to another mirror.
https://doc.qt.io/qt-6/get-and-install-qt-cli.html

@finch Hi and welcome to devnet,

Based on the 6.7 supported platform list, you need Ubuntu 22.04.

This took me ages to fix but in the end I fixed this problem by:

Example Batch Script:
Here’s how you can create a batch script to clear the PATH and run the Qt installer:

Open Notepad.
Copy and paste the following lines into Notepad:
batch
Copy code
@echo off
rem Clear the PATH environment variable
set PATH=
rem Run Qt installer
"InstallerPath/...."
Save the file with a .bat extension, for example, install_qt.bat.
Run the batch script by double-clicking it. This will open a Command Prompt window, clear the PATH, and then run the Qt installer.
Note:
Replace "InstallerPath/...." with the correct path to your Qt installer.
Ensure that the Qt installer file you're using is not corrupted and that you have downloaded it completely.

check the archive checkbox.

@SGaist I couldn't find anything that was wrong or why it was not working so decided to spend my time/energy in getting a clean install of Ubuntu 24.04 up and running and then built Qt6.7.1 with all the dependancies. I've just built QT Creator succesfully against my 671 build and so got what I wanted in the end.

Thanks for your comments and pointers, time to go play with making Creator widget plug ins now :-)

Please properly format your code so others can read it.
When you use a class/function from a library, you also have to link against it. You are using the QSerialPortInfo class so you also must link against the library which contains it as written in the documentation.