[clang] [llvm] [PAC][clang][Driver] Add signed GOT flag (PR #96160)

[Fangrui Song via llvm-commits]

MaskRay wrote:

Sorry, I haven't spent a lot of time on the review and the user interface. -mllvm and -Xclang options are for internal testing and might change names or disappear in the future. Driver options offer more stability for users.

Given the complexity of the feature and lack of upstream runtime linker (rtld) support, it might be wise to delay exposing it through driver options until it's more mature. What do you think?

https://github.com/llvm/llvm-project/pull/96160