deprecate and then remove -fwarn-hi-shadowing
I realized that the flag is not used in the compiler at all, and @slyfox realized that the flag was last used in 2006. He also found out that there are 355 packages in the Hackage that use this useless flag. So we should maybe first deprecate it and remove it later.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.10.2 |
| Type | Task |
| TypeOfFailure | OtherFailure |
| Priority | lowest |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |