> Why is -fsso-struct= listed only for C and C++, not ObjC and ObjC++? Because it was not tested with the latter 2 languages at all and may require specific adjustments in the respective front-ends to work.
> Almost all C options should be supported for ObjC and almost all C++ > options should be supported for ObjC++ (and the existing cases that aren't > in c.opt generally look dubious). Sorry, I have zero experience with ObjC and objC++, let alone their front-end. -- Eric Botcazou
