or download this
At the moment of writing, AIX supports two different native C compiler
+s,
for which you have to pay: B<xlC> and B<vac>. If you decide to use eit
+her
...
xlC.C 3.1.4.10 or 3.6.6.0 or 4.0.2.2 or 5.0.2.9 or 6.0.0.3
vac.C 4.4.0.3 or 5.0.2.6 or 6.0.0.1