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Re: DWARF debugging format implementation

On Mon, 29 Sep 2003 21:17:47 -0400, Daniel Berlin <> said:
> On Sep 29, 2003, at 8:42 PM, Devang Patel wrote:

>> I'd like to know the status of implementation of DWARF debugging
>> format in FSF tool chain. What is the status of C++ namespace
>> support and duplicate header removal? I see some code for these
>> features in GCC, but I do not know whether
>> 1) it is incomplete

> I had patches to do namespace support, but it required moving some
> stuff like some c++ specific tree codes to the common codes.
> It may be easier to do it cleaner now, it may not be.
> David Carlton has probably newer veresions of my patches.

The latest versions that I have are in the log for bug 11114.  They
work with 3.2; they don't work with 3.3, I think (I haven't tried).

>> 2) it is waiting for support from GDB and/or binutil

> Yes to this for duplicate header removal.
> DW_FORM_ref_addr support in particular.

> This will require significant changes to the DWARF2 reader.

> It should at least ignore DW_TAG_namespace properly now, so ...

GDB 5.3 and later are safe to use with compilers generating
DW_TAG_namespace.  GDB 6.1 will probably take advantage of that
information (and, in general, will handle nested types better); with a
bit of luck, the relevant patches will hit mainline GDB in the next
month or two.

(I have no idea who, if anybody, is working on duplicate header

David Carlton

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