SETUP/setup.sh

   1 setup_tmp=`mktemp -d -t setup`
   2 printenv | sort > "${setup_tmp}/orig"
   3 make print_exports | grep -E -v '^(MAKE|MFLAGS|SHLVL)' > "${setup_tmp}/exports"
   4 eval `comm -13 "${setup_tmp}/orig" "${setup_tmp}/exports" | sed 's,^\(.*\)$,export "\1",'`
   5
   6