The three logs seem to be for xlC, xlC -q64 and xlc -q64. xlC is the C++
compiler. I'm not sure if Emacs is meant to be built with C++. I'd suggest
trying with just vanilla xlc.

The ar error you're getting with xlc -q64 is because AIX archives can be
either 32-bit, 64-bit or both (containing the .o's for both). You need to
add -X32, -X64 or -X32_64 to your ARFLAGS.

When I was a developer on xlc, I used Emacs 24.2 on AIX6 built with gcc.
Whenever I built Emacs with xlc, I'd get segfaults after some amount of
time, usually corruption detected during garbage collection.