gc-sections removing required sections of elf

[Alan Modra]

On Mon, Feb 24, 2014 at 04:53:50PM +0530, Nagaraju Mekala wrote:
> Thanks Alan for the reply.
> 
> On Fri, Feb 21, 2014 at 5:47 AM, Alan Modra <amodra@gmail.com> wrote:
> > On Thu, Feb 20, 2014 at 11:11:19PM +0530, Nagaraju Mekala wrote:
> >>   Can anyone please let me know how can we tell the garbage collector
> >> to not to delete .debug information of _exit function.
> >
> > Have a look at what is happening inside _bfd_elf_gc_mark_extra_sections.
> I looked at the _bfd_elf_gc_mark_extra_sections and tried modifying it
> with the basic knowlege I had.

I wasn't suggesting that you modify _bfd_elf_gc_mark_extra_sections.
It should work as is.  What I was suggesting is to run the failing
link under gdb and step through _bfd_elf_gc_mark_extra_sections paying
attention to the object file (ibfd) that defines _exit.  Is that file
seen as ELF?  Do you see some_kept set true for that file?  If so, are
the debug sections in that file marked with gc_mark?

-- 
Alan Modra
Australia Development Lab, IBM