[Bug ld/6478] stab warnings cause linker errors

[nickc at redhat dot com]

------- Additional Comments From nickc at redhat dot com  2008-05-14 09:37 
-------
Subject: Re:  stab warnings cause linker errors

Hi Vincent,

   (I have not forgotten about this problem, but I am really swamped 
just at the moment).

> However, I'm quite surprised when I look at the b-cvs-elf.o symbol table : 
> the 
> _f symbol is both undefined and defined in the .text segment !

This is because of the stab warning - it creates an undefined reference 
to the symbol that it is warning about.

I did find that if you rearrange your test case so that the declaration 
of _f in b.s occurs before the .stabs directives then the conversion 
will work as well.

The problem seems to be that when the undefined reference to _f occurs 
in b.s before the definition, then when b.o is converted into ELF format 
*two* instances of _f are created, one undefined and one defined, and 
when a.o is linked in it is this undefined instance that is used, not 
the defined one.  I have so far been unable to locate exactly where 
these two instances are created in the BFD library.  But I am working on 
it...

Cheers
   Nick




-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=6478

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