[Bug libc/11120] strncmp() will be broken if used in ld.so on x86-64

["dhatch at ilm dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=11120

--- Comment #9 from Don Hatch <dhatch at ilm dot com> 2013-03-22 04:30:08 UTC ---
(In reply to comment #7)
> (In reply to comment #5)
> > The reason I started looking at this bug
> > is I was noticing flakiness of getenv() when called inside ld.so;
> 
> getenv() is not normally called inside rtld.
> Are you talking about some patched rtld?

I'm using it for debugging.
(There are also uses of getenv and strncmp throughout the elf subdirectory
which I mistakenly thought were part of rtld... apparently not).

Thanks for the fix.  It will prevent a lot of further wasted time.

Can you comment on the fact that, prior to your latest change
which now prevents calling it altogether,
strncmp was returning inconsistent results?
This is contrary to what I would expect from Mark Seaborn's original
description "If strncmp() is ever used in ld.so on x86-64 it will
silently be implemented as strcmp()".

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