Link time checking for incompatible flags

[Rahul Joshi]

Hi all,

A few days back, I had a hard time debugging my code, and the 
reason was that I was linking code compiled with -fshort-enums
with code not compiled using that flag. It would have been
great if linker had somehow figured out the discepancy and
issued a warning. Would it be possible to add such link-time
checking for incompatible compiler options?

Thanks
Rahul