[cfe-dev] Compiler flag negation not working for instrument functions?

[Gonzalo BG]

I'm trying to disable instrument functions for a single TU where the
instrumentation is specified. To enable the flag "-finstrument-functions"
is used. To disable the flag I've tried "-fno-instrument-functions".
However:

> clang: error: unknown argument: '-fno-instrument-functions'

Is there a different convention in clang for disabling a compiler flag?
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