setting than environmental variable in FreeBSD
example on single command line
setenv XERCESCROOT ERCESCROOT=/home/cary/xerces/xerces-c-src_2_7_0
echo $XERCESCROOT
setenv XERCESCROOT ERCESCROOT=/home/cary/xerces/xerces-c-src_2_7_0
echo $XERCESCROOT


