How to build Qt submodules in linux

[drakejest]

I have the Qt6 installed on my raspberry pi 4 running the latest OS Bullseye using this guide here

https://www.tal.org/tutorials/building-qt-62-raspberry-pi

The installation went successfully, i was able to build and run test projects.

Now in a project im working on im going to need the multimedia submodule, but im having errors installing it.

So according to the Building Qt submodules portion of the guide (bottom part) I first have to download the tarz. Which i did, placed it inside a folder in the desktop, opened terminal and cd into that folder.

I then did run

tar xf qtmultimedia-everywhere-src-6.2.3.tar.xz

It had no problem executing that. The error happens on the next step, the guide tells me to run

/opt/Qt/6.2.3-armv7l/bin/qt-configure-module .

And im getting an error of

Error: . is not a valid Qt module source directory.
Usage: qt-configure-module <module-source-dir> [options]

To display the available options for a Qt module, run
qt-configure-module <module-source-dir> -help

Im not knowledgeable in Linux enough to understand what this error means, can anybody help me how to fix this ?

[JonB]

@drakejest
So --- bearing in mind I know nothing about this --- wouldn't you want to do either

cd qtmultimedia-everywhere-src-6.2.3 ; /opt/Qt/6.2.3-armv7l/bin/qt-configure-module .
# or
/opt/Qt/6.2.3-armv7l/bin/qt-configure-module qtmultimedia-everywhere-src-6.2.3

? I don't know, but it seems coomon sense to me, how would /opt/Qt/6.2.3-armv7l/bin/qt-configure-module . know to go down into qtmultimedia-everywhere-src-6.2.3 sub-directory? Maybe it does, maybe you need to tell it.....

[JohnZX]

May be need change <module-source-dir> to Your Path to module source directory ?!

Error: . is not a valid Qt module source directory.

[JonB]

@JohnZX , @drakejest
After tar xf qtmultimedia-everywhere-src-6.2.3.tar.xz the instructions say to do mkdir qtbasebuild && cd qtbasebuild, did you do that?

[drakejest]

@JonB

I dont see it saying that. The instructions are:

Building Qt submodules
Qt submodules contains various extra features not included in the base package, for example QtQuick, support for Wayland, CAN-BUS and so forth. For most parts, building the submodules is quite straightforward:

1. download the source for the submodule you require

2. extract the archive

tar xf submodule-version.tar.xz

3. configure sources

/opt/Qt/6.2.3-armv7l/bin/qt-configure-module .

4. build the sources

/opt/cmake/bin/cmake --build . --parallel 4

5. install the result

/opt/cmake/bin/cmake --install .

But i did that anyway, its still the same. Do note that the tar file is on a desktop folder i created. "qt modules" is the folder i created where i put all the tar qt modules i downloaded. Should i move the tar file elsewhere and do these commands there?

pi@raspberrypi:~/Desktop/qt modules $ tar xf qtmultimedia-everywhere-src-6.2.3.tar.xz
pi@raspberrypi:~/Desktop/qt modules $ mkdir qtbasebuild && cd qtbasebuild
pi@raspberrypi:~/Desktop/qt modules/qtbasebuild $ /opt/Qt/6.2.3-armv7l/bin/qt-configure-module .
Error: . is not a valid Qt module source directory.
Usage: qt-configure-module <module-source-dir> [options]

To display the available options for a Qt module, run
qt-configure-module <module-source-dir> -help
pi@raspberrypi:~/Desktop/qt modules/qtbasebuild $

[drakejest]

@JohnZX

Where is the "<module-source-dir>"? is it that tar that i just extracted ? or it this qt directory?

I have posted the relevant section of the guide in my comment above. I also pasted the whole terminal on what i did before

[JonB]

@drakejest said in How to build Qt submodules in linux:

I dont see it saying that.

You are right, I quoted from the wrong part. My bad.

~/Desktop/qt modules: I would not create a directory with a space in it under Linux. There is a small chance that is upsetting the process.

tar xf qtmultimedia-everywhere-src-6.2.3.tar.xz

After executing this, depending on what is in that tar file, does it create a top-level directory, like maybe qtmultimedia, into which it has extracted the files, or does it extract everything straight into the directory you are in with files at the top-level?

[drakejest]

@JonB

I removed the space and tried again. Sadly the error is still the same,

pi@raspberrypi:~/Desktop/qtmodules $ tar xf qtmultimedia-everywhere-src-6.2.3.tar.xz
pi@raspberrypi:~/Desktop/qtmodules $ /opt/Qt/6.2.3-armv7l/bin/qt-configure-module .
Error: . is not a valid Qt module source directory.
Usage: qt-configure-module <module-source-dir> [options]

To display the available options for a Qt module, run
qt-configure-module <module-source-dir> -help
pi@raspberrypi:~/Desktop/qtmodules $ 

@JonB said in How to build Qt submodules in linux:

After executing this, depending on what is in that tar file, does it create a top-level directory, like maybe qtmultimedia, into which it has extracted the files, or does it extract everything straight into the directory you are in with files at the top-level?

Yes it does, so upon executing tar, the qtmodules folder will now have another folder named "qtmultimedia-everywhere-src-6.2.3"

qtmodules
- qtmultimedia-everywhere-src-6.2.3
- qtmultimedia-everywhere-src-6.2.3.tar.xz

[JonB]

@drakejest
So --- bearing in mind I know nothing about this --- wouldn't you want to do either

cd qtmultimedia-everywhere-src-6.2.3 ; /opt/Qt/6.2.3-armv7l/bin/qt-configure-module .
# or
/opt/Qt/6.2.3-armv7l/bin/qt-configure-module qtmultimedia-everywhere-src-6.2.3

? I don't know, but it seems coomon sense to me, how would /opt/Qt/6.2.3-armv7l/bin/qt-configure-module . know to go down into qtmultimedia-everywhere-src-6.2.3 sub-directory? Maybe it does, maybe you need to tell it.....

[drakejest]

@JonB

Sorry it took so long to reply, so what you have said worked perfectly ! I couldnt be more happier

I had to install pre-requisite modules which took so long to build but now qt creator is able to detect the multimedia module !

Thank you for you help !