Re: C++20 and gcc12/10

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

I'm not sure whether I'm understanding this correctly.

It appears to me that for some m and n (probably m=10/12 and n=20)

1. gccm claims to support c++n (i.e., accepts --std=c++n)
2. gccm doesn't fully support c++n
3. a substantial amount of software that declares to need c++n in fact 
   is happy with the subset of c++n supported by gccm

If 1. and 2. are correct: does GNU claim gccm supports c++n?

If all of the above is correct, it looks to me that the only solutions for 
pkgsrc are

A. declare that c++n needs gcck for some k>m
B. introduce a notion of c++n-lite for the subset supported by gccm