Re: DWARF-related warnings in DJGPP build of GDB

[Mark Kettenis <mark.kettenis@xs4all.nl>]

> Date: Fri, 17 Apr 2009 12:40:04 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> 
> > Date: Wed, 15 Apr 2009 13:10:49 +0300
> > From: Eli Zaretskii <eliz@gnu.org>
> > 
> > During debugging with DJGPP build of GDB built out of Apr 10th
> > snapshot, I sometimes see various warnings that seem to be related to
> > DWARF2.  Examples:
> > 
> >   During symbol reading, inner block not inside outer block in prompt_for_continue.
> >   During symbol reading, inner block (0x61ab0-0x6b68b) not inside outer block (0x64c90-0x64d2f).
> >   During symbol reading, Offset 174868 out of bounds for DW_AT_ranges attribute.
> > 
> > Is this a GCC problem, a GDB problem, or something else?  Should I be
> > worried?  My GCC version is 3.4.3, in case that matters.
> 
> Btw, I see warnings on GNU/Linux as well, with GCC 4.0.3 and Binutils
> 2.16.91:
> 
>   During symbol reading, incomplete CFI data; unspecified registers (e.g., rax) at 0x444d44.
>   During symbol reading, DW_AT_type missing from DW_TAG_subrange_type.
> 
> This is when debugging a recent snapshot of GDB with itself.

Which probably means that it used the .gdbinit that is automatically
generated in the build directory, which has

set complaints 1

in it.  This makes GDB very picky about the DWARF it is reading.  

> Does anyone else see this?  Are the compiler and/or Binutils installed
> on that system (fencepost.gnu.org) too old?

Yes, I see messages very similar to those.  The exact messages you see
depend (mostly) on the specific version of GCC you use.  Some of these
bugs have been fixed in later versions, others remain.  For most of
these issues, we have workarounds in GDB.