[PATCH] D158301: Add back overriding-t-options for -m<os>-version-min diagnostic

[Duncan P. N. Exon Smith via Phabricator via cfe-commits]

dexonsmith added inline comments.


================
Comment at: clang/test/Driver/darwin-version.c:217
 // RUN:   FileCheck --check-prefix=CHECK-VERSION-TNO-OSV1 %s
-// CHECK-VERSION-TNO-OSV1: overriding '-mmacos-version-min=10.6' option with '-target x86_64-apple-macos10.11.2'
+// CHECK-VERSION-TNO-OSV1: overriding '-mmacos-version-min=10.6' option with '-target x86_64-apple-macos10.11.2' [-Woverriding-t-option]
 
----------------
MaskRay wrote:
> dexonsmith wrote:
> > Why would we want to use the old name here? An alias seems strictly better to me. 
> Making `overriding-t-option` an alias for `overriding-option` would make `-Wno-overriding-t-option` applies to future overriding option diagnostics, which is exactly what I want to avoid.
> 
I understand that you don't want `-t-` to apply to work on future overriding option diagnostics, but I think the platform divergence you're adding here is worse.

Having a few Darwin-specific options use `-Woverriding-t-option` (and everything else use `-Woverriding-option`) as the canonical spelling is hard to reason about for maintainers, and for users.

And might not users on other platforms have `-Woverriding-t-option` hardcoded in  build settings? (So @dblaikie's argument that we shouldn't arbitrarily make things hard for users would apply to all options?)

IMO, if we're not comfortable removing `-Woverriding-t-option` entirely, then it should live on as an alias (easy to reason about), not as canonical-in-special-cases (hard to reason about).


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158301/new/

https://reviews.llvm.org/D158301