[cfe-dev] Can I tell clang to NOT accept unknown flags?

[Clifford Yapp]

I'm building a large project with clang, and there are configure mechanisms
set up that are intended to test whether a compiler supports a variety of
flags.  This gets tricky if clang accepts ALL flags and ignores unknowns -
is there a way (something like the opposite of -Qunused-arguments) that will
allow tests to fail for unknown arguments?

Thanks,
CY
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