> Ah, here it is.
> 
> The failure seems to be due to solib_aix_free_library_list only
> being defined if HAVE_LIBEXPAT is defined, but it is being used in
> solib_aix_normal_stop_observer regardless of HAVE_LIBEXPAT being
> defined or not.
> 
> I was missing libexpat in my system, so that's why i was seeing this
> failure. Looks like it is a real GDB bug.

Ah, you are very right, and if I understand things correctly, you'd
even have a link failure if you compiled past the warning. Fixed
thusly:

gdb/ChangeLog:

        * solib-aix.c (solib_aix_free_library_list): New function
        for the case where HAVE_LIBEXPAT is not defined.

Although, now that I have checked the change in, I am wondering
whether I could simply move the function out of the #if defined
(and whether that might make sense or not)... The main advantage
is that we're not duplicating the function's prototype.

Not much time today, but I will keep that for tomorrow. In the meantime,
I wanted the problem to be fixed ASAP.

-- 
Joel