[Bug c/87806] Option -Wall should warn about unused structs, typdefs, enums, etc

[Ulrich.Windl at rz dot uni-regensburg.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87806

--- Comment #1 from Ulrich Windl <Ulrich.Windl at rz dot uni-regensburg.de> ---
This is an enhancement request (cant't set it in Bugzilla)