[rfc] [0/7] Modernize AIX target

["Ulrich Weigand" <uweigand at de dot ibm dot com>]

Hello,

now that I have access to an AIX 5.3 machine, I've attempted to
"modernize" the AIX target, and in particular get rid of its use
of infptrace.o.

The following set of patches first of all gets the AIX native
target back to building (which it currently doesn't), and then
switches it to use an inf-ptrace based target_ops, and removes
many of the special hooks in nm-rs6000.h.

The only remaining hooks relate to xcoff shared library handling.
Getting this cleaned up looks nontrivial; I'll see if can figure
something out ...

The patches were all tested on powerpc-ibm-aix5.3.0.0; while
testsuite results aren't all that good, the patches actually
improve them somewhat.

I'd appreciate any comments; if nobody objects I plan to commit
the patches in a couple of days. 

Bye,
Ulrich

-- 
  Dr. Ulrich Weigand
  GNU Toolchain for Linux on System z and Cell BE
  Ulrich.Weigand@de.ibm.com