On Mon, Oct 31, 2016 at 12:58:23PM -0400, Jason Merrill wrote:
> On 10/14/2016 03:41 PM, Jakub Jelinek wrote:
> >Another set of GNU extensions that were accepted into DWARF5, so we should
> >emit them even for -gstrict-dwarf -gdwarf-5, and for -gdwarf-5 should use
> >the accepted standard opcodes instead of the corresponding GNU ones.
>
> Hmm, I wonder if we also want to use the standard opcodes instead of the GNU
> ones in -gdwarf-4 and below.
Maybe in 2 years, but not now IMHO. The GNU opcodes are supported by lots of
consumers for often as long as 5 years, while the DWARF5 ones might be
supported next year. So, emitting them now by default would mean e.g.
most of the guality tests would fail until one updates to the not yet
existing GDB. Similar reason why we IMHO shouldn't enable -gdwarf-5 by
default in GCC 7, but should wait for GCC 8+ with that.
Jakub
