asl wrote:

I think we'd need to keep driver flags for `pauthtest` ABI as the intention is 
to enable easier bringup of pointer authentication ABI on a new target:
  - `pauthest` is intended to be used for experimenting with signing schema w/o 
changing compiler
  - the signing schema is explicitly encoded in the pauth elf marking

Though certainly for other *named* ABIs (say, platform dependent) they should 
be disabled by default and it is up to platform to decide on signing schema.

https://github.com/llvm/llvm-project/pull/113152
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