On Mon, 11 Jan 2021 10:47:23 +0100, Geert Uytterhoeven said:

> I guess this is the cause of the new "warning: invalid suffix on
> literal; C++11 requires a space between literal and string macro
> [-Wliteral-suffix]" with gcc 4.9 or 5.4?

Well, we fixed a #error, and picked up a warning.  That's progress. ;)

It's probably related. I'm just having a hard time understanding why 4.9 and 5.4
whine about the lack of a space, while 8.3 and 11 didn't complain...

I'll see if I can cook up a patch that newer gcc are still happy with.  You able
to easily test with 4.9 or 5.4?