LO 24.2 C++20 baseline

[Christian Lohmaier]

Hi Andreas,

On Fri, Sep 22, 2023 at 11:09 PM Andreas Mantke <maand at gmx.de> wrote:
> You can also look in config.log for more details as to why it fails
>
> I tried with:
> export CC=/usr/bin/gcc-12

That's not enough, when doing it that way you'd also have to export
CXX (one for gcc compiler, the other env for the g++ compiler)

ciao
Christian