[PATCH] D126511: [ARM][AArch64] Change -mharden-sls= to use err_drv_unsupported_option_argument

[Phoebe Wang via Phabricator via cfe-commits]

pengfei added a comment.

This is also fine to me. I'll rebase on it if @nickdesaulniers accept this.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D126511/new/

https://reviews.llvm.org/D126511