To compile this on a 64bit CentOS6 VM:

The following packages must be built as 32bit by passing
the --32bits option to scons (i.e. "scons --32bits install")

cMsg
evio
et
codaObject
codaChannels


This installs the files into $CODA/Linux-x86_64-32
(and not into $CODA/Linux-i686 as you might expect).
The various package environment variables must be
unset so that all are pulled from the CODA install
directory.

The $CODA/Linux/lib symbolic link needs to be
changed to point to ../Linux-x86_64-32/lib instead
of the default ../Linux-i686/lib.