Re: [lto] PATCH: Locate DWARF information in ELF files

[Mark Mitchell <mark at codesourcery dot com>]

Andrew Pinski wrote:
> 
> On Jun 18, 2006, at 1:25 PM, Mark Mitchell wrote:
> 
>>
>> This patch makes the LTO front end open ELF files and locate the DWARF
>> sections required for building LTO information.  The ELF-specific bits
>> are segreated into a separate file so that platforms using other
>> object file formats can be supported in future.  We will probably also
>> need some autoconf bits to detect libelf; for now, we'll just assume
>> its available.
> 
> Isn't libelf not part of the GNU project?  Even some GNU/Linux does not
> include libelf by default.  Why not use BFD to read the dwarf2 info
> instead?

At this point, I don't consider this choice to be very interesting; the
hard parts are reading/writing the GCC tree representation.  This stuff
is just a way to get to the hard parts, so we can achieve proof of concept.

I chose libelf because it seemed the simplest way to get past this bit,
and on to the next part.  But, I wrote the interface in such a way that
it's easy to drop in a different object file reader.  I had thought
people would use that to support Mach-O or PE/COFF, but if you want to
contribute a BFD port, that's fine by me.

-- 
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713