@b4n approved this pull request.
Just tested with Debian Buster's regular g++ (8.3) which works, and ag++ wrapper hack (for it to fail): ```python3 #!/usr/bin/env python3
from os import execvp from sys import argv
args = ['g++'] for arg in argv[1:]: if arg.startswith('-std='): continue # or: arg = '-std=gnu++11' args.append(arg) execvp(args[0], args) ``` And `CXX=/tmp/hack++ ./configure` and it does trigger a failure.
So LGTM if we indeed do need C++17 already.