Mailing List Archive: Raspberry Pi 5

I want to use a Pi5 as a backend.
One of the backend’s tasks is to do some logging, using a Qt5 program I wrote. Compile fails with
usr/include/c++/12/bits/stl_relops.:62: Parse error at “std"

Googling suggest bookworm-thats-wot-dunnit

Since my logger compiles on x64_86 on ubuntu, that is a way forward.
The wiki on building from src urges not using ubuntu, as far as I can tell that relates to frontend stuff. Any opinion as why I ought not use ubuntu?
The BE would be headless, FE is not relevant.

James
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On Fri, Mar 1, 2024 at 5:59?AM James Linder <jam@tigger.ws> wrote:
>
> I want to use a Pi5 as a backend.
> One of the backend’s tasks is to do some logging, using a Qt5 program I wrote. Compile fails with
> usr/include/c++/12/bits/stl_relops.:62: Parse error at “std"
>
> Googling suggest bookworm-thats-wot-dunnit

Sounds like QT Bug 73263:
https://bugreports.qt.io/browse/QTBUG-73263
which is actually a moc bug.

A common fix is to move the
#include <filesystem>
to below the
#include <QApplication>
or some other <Qsomething>
include such as <QObject>

> The wiki on building from src urges not using ubuntu, as far as I can tell that relates to frontend stuff.

I suspect that at the time that that
recommendation was written the
graphics support for the Pi in
Ubuntu was not optimal (so FE
stuff). Reportedly the performance
got better (and then worse, and
then better again) at various times
in the Ubuntu release cycles.
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