Google C++ needs for Clang

[bearophile]

Adam D. Ruppe:

> The other two errors in that blog are done by D right now, despite
> it being obsolete, stupid, and not good enough yet.

See also the -fcatch-undefined-behavior, -ftrapv and (the removed) -ftrapu Clang switches:
http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=136205
http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=136717

Bye,
bearophile