* Neal Gompa:
Why C99? Why not C18 instead? If we're going to go through this
effort, we should ramp up like we did for C++ and bump all the way up
to the latest published standard.
Getting past C99 is the hardest part because it's not possible (as far
as I can see) to do fully automated reporting for implicit function
declarations. (Because we don't implement, say, setproctitle, that's
going to show up as a legitimate configure check failure.)
The other issues (e.g., implicit ints, true/falls/bool redefined, () for
variadic parameter lists) are more tractable because those have to be
removed completely. So their presence is always worth reporting.
Thanks,
Florian