[Bug ld/12496] Linker fails with "could not read symbols: Bad value" message

[hjl.tools at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12496

--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> 2011-02-24 16:58:43 
UTC ---
(In reply to comment #10)
> Yes, ld.gold and ld.dk silently use non-LTO part of div.o; it's a bug. 
> However,
> I don't think that an undefined reference error is not a bug.
> 
> 1. The testcase compiles well without -flto or with -fno-use-linker-plugin.
> 2. Imagine a bare-metal program, such as a kernel. When building it, the
> standard C library is not used, and compiler-generated calls to memcmp, etc.
> are resolved within the program itself. To work around the bug, a library with
> these functions must be compiled without -flto.

I think it is the correct behavior since the LTO version of
the function isn't used anyway.

> Again, an unpleasant thing is that the order of linking with LTO differ from
> one without LTO, and linkers disagree with each other on this matter.
> 
> P.S.: Will ld.hjl be obsoleted by ld.dk? If yes, perhaps fixing it does not
> worth a trouble...

It depends. ld.dk has the same bug as gold.

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