gtkmm4.0 build fails compilation with g++ 11 Fedora 34 (+ fix)
Hi,
As the title says. The build falls in expressionwatch.h.
I see std:: optional is used, but the header is not included. I guess g++ is stricter on these type of errors .. good.
Merely adding
#including<optional>
fixes it.
Cheers.
Edited by Alexander Borro