AIX & LIBPATH

The AIX operating system assumes /usr/lib:/lib if LIBPATH is notset, if LIBPATH is set then AIX operating system only uses the pathin theLIBPATH var.

By using changing the assignment statement to
LIBPATH=${LIBPATH:-"/usr/lib:/lib"}:/home/abc/lib
we can make sure the /usr/lib:/lib is always included on theLIBPATH.