[PATCH v2] dwarf_getaranges: Build aranges list from CUs instead of .debug_aranges

[Frank Ch. Eigler]

Hi -

> > We could then also introduce a new public function, dwarf_getdieranges
> > (?) that does the new thing. But it doesn't have to be public on the
> > first try as long as dwarf_addrdie and dwfl_module_addrdie work. (We
> > might want to change the interface of dwarf_getdieranges so it can be
> > "lazy" for example.)
> 
> Ok this approach seems like the most flexible.  Users can have both
> .debug_aranges and CU-based aranges plus we don't have to change the
> semantics of dwarf_getaranges.  [...]

Another option is to generate the .debug_aranges automatically, but
only if it is absent from the input dwarf file.  (An eu-readelf user
can tell if it was synthetic or not, if it matters.)

- FChE