Re: USE_LANGUAGES and wrappers

[nia <nia%NetBSD.org@localhost>]

It seems that most of the disagreements are over defaulting to c++03,
which I now understand the drawbacks for.

Do we agree that USE_LANGUAGES should be replaced?

I would introduce two new vars, FORCE_C_STD and FORCE_CXX_STD.
Unlike USE_CC_FEATURES and USE_CXX_FEATURES, each variable can only be
set once.

Adding e.g. gnu++11 would cause c++11 to be removed, which
would remove a lot of uses of BUILDLINK_TRANSFORM in indiviaul
packages to allow use of alloca().