Operating system: AIX 4.3
xlc version:      C for AIX Compiler, Version 5
xlc options:	  -qARCH=com -O2

Also included libox_pwr4.a (rename to libox.a to use)
Operating system: AIX 5.1
xlc version:      VisualAge C++ Professional / C for AIX Compiler, Version 6
xlc options:	  -qARCH=pwr4 -O5

libox_pwr4.a is experimental and will only run on POWER4 platforms