Cannot compile qt6 for Raspberry Pi 3

britesc

Hi,

I am using the guide at:
[link text]
https://wiki.qt.io/Cross-Compile_Qt_6_for_Raspberry_Pi
(link url)
I have set up a Virtualbox of Ubuntu 24.04 and have followed the instructions to the letter, as all was going well without any errors. When I get to:
Building Qt 6 for Host Machine
-> cmake --build . --parallel 8
it all falls apart, with the following errors (last few)

/home/install/qt5/qtbase/src/gui/platform/unix/qxkbcommon.cpp:392:5: error: template argument 158 is invalid
/home/install/qt5/qtbase/src/gui/platform/unix/qxkbcommon.cpp:392:5: error: template argument 159 is invalid
/home/install/qt5/qtbase/src/gui/platform/unix/qxkbcommon.cpp:392:5: error: template argument 160 is invalid
[1828/10443] Building CXX object qtd...Qml.dir/compiler/qqmlirbuilder.cpp.o
ninja: build stopped: subcommand failed.

I have tried to use 6.4.0 as in the guide, but that failed. So I tried 6.5.2 and that fails at the same spot.
I have tried 6 or so times with clean VMS but always when I reach that part it croaks.

My only thought is that perhaps the Raspberry Pi 3 OS (Bullseye) Full (Legacy 64 Bit) is causing the problems.
I have a number of Raspberry Pi 3s I want to use on projects rather than gathering dust.

So, do I need a higher spec Raspberry Pi?
A different Raspberry Pi Version?

Anyone with any advice gratefully received.
I'll even name the project after you if I can get it setup and compiled!!!

Thanks and kind regards,

jB

jsulm

@britesc said in Cannot compile qt6 for Raspberry Pi 3:

with the following errors (last few)

You should look for the very first error

JonB

@britesc
I know nothing about this :) But did some Googling which may help?

First I will say I was "surprised" that your work and the instructions seems to fetch/use "Qt5" stuff when you want to build Qt6, but I guess that's right, for whatever reason!

For your error message I came across https://github.com/microsoft/vcpkg/issues/32135#issuecomment-1603081312

I was able to resolve this issue by installing the additional required packages for qt5base (although I am targeting q6) and X11

required by qt5-base for qt5-x11extras

APT_PACKAGES="$APT_PACKAGES libxkbcommon-dev libxcb-keysyms1-dev \

libxcb-image0-dev libxcb-shm0-dev libxcb-icccm4-dev libxcb-sync-dev \

libxcb-xfixes0-dev libxcb-shape0-dev libxcb-randr0-dev \

libxcb-render-util0-dev libxcb-xinerama0-dev libxcb-xkb-dev libxcb-xinput-dev"

Does this list of dependencies have any relevance for your situation?

That's all I know!

P.S.
I see @jsulm has just posted. You should listen to him more than to me!