[RFA] Silence some warnings [was Re: "introduce no new bootstrap..."]

[Jason Merrill]

>>>>> "Zack" == Zack Weinberg <zackw@Stanford.EDU> writes:

>> Does DWARF2 or whatever have the ability to take all this info?  I
>> hate to think of the size that debug info would become.

> I believe DWARF2 can handle it, and it's not significantly worse than
> inline functions.

I would think all reasonable debugging backends would benefit from this; we
want to be able to generate correct line number information for macro
expansions in the code.  All DWARF2 adds is the ability to refer to macro
names from the debugger (so we could say, i.e. 'p TREE_TYPE (t)', which the
debugger would expand to p t.common.type).

Jason