> ----- Original Message -----
>
> Tatsuro MATSUOKA writes:
> > I tried both CXXFLAGS="-std=gnu++11" and CXXFLAGS="-std=gnu++14" to the
> > configure but the results are the same.
>
> It turns out this is a latent bug in Qt5 sources. It was relying on an
> implicit include chain that is no longer present in gcc-11 header files.
>
> https://github.com/MultiMC/Launcher/issues/3574
>
>
> Regards,
> Achim.
Thank you for your information.
I use gcc-10 for the moment.
Tatsuro
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