I try to build mongodb on aix 5.3 ,it's all Ok when I finished install python 2.7.1 and scons 2.0.1.
but when I followed the offical document http://www.mongodb.org/display/DOCS/scons to build
mongodb , it got wrong and stopped , the error message is:

scons: Reading SConscript files ...
scons version: 2.0.1
python version: 2 7 1 'final' 0
No special config for [aix5] which probably means it won't work
KeyError: 'LIBS':
File "/app/mongodb-src-r1.8.1/SConstruct", line 1011:
env = doConfigure( env )
File "/app/mongodb-src-r1.8.1/SConstruct", line 789:
myenv["LIBS_CLEAN"] = list( myenv["LIBS"] )
File "/app/python/lib/scons-2.0.1/SCons/Environment.py", line 408:
return self._dict[key]