4526 nightly contains a great deal of effectively dead code

*** 162,171 ****
--- 162,172 ----
          LC_NUMERIC=C \
          LC_TIME=C
  
  # clear environment variables we know to be bad for the build
  unset \
+         CH \
          LD_OPTIONS \
          LD_LIBRARY_PATH \
          LD_AUDIT \
          LD_BIND_NOW \
          LD_BREADTH \
*** 225,239 ****
  [[ -f "${CODEMGR_WS}/usr/src/Makefile" ]] || fatal_error "Error: ${CODEMGR_WS}/usr/src/Makefile not found."
  
  # must match the getopts in nightly.sh
  OPTIND=1
  NIGHTLY_OPTIONS="-${NIGHTLY_OPTIONS#-}"
! while getopts '+0AaBCDdFfGIilMmNnopRrtUuWwXxz' FLAG "$NIGHTLY_OPTIONS"
  do
          case "$FLAG" in
-           o)    flags.o=true  ;;
-           +o)   flags.o=false ;;
            t)    flags.t=true  ;;
            +t)   flags.t=false ;;
            *)    ;;
          esac
  done
--- 226,238 ----
  [[ -f "${CODEMGR_WS}/usr/src/Makefile" ]] || fatal_error "Error: ${CODEMGR_WS}/usr/src/Makefile not found."
  
  # must match the getopts in nightly.sh
  OPTIND=1
  NIGHTLY_OPTIONS="-${NIGHTLY_OPTIONS#-}"
! while getopts '+0ABCDdFfGIilMmNnpRrtUuw' FLAG "$NIGHTLY_OPTIONS"
  do
          case "$FLAG" in
            t)    flags.t=true  ;;
            +t)   flags.t=false ;;
            *)    ;;
          esac
  done
*** 301,323 ****
          export PATH
  fi
  
  export DMAKE_MODE=${DMAKE_MODE:-parallel}
  
- if "${flags.o}" ; then
-         export CH=
- else
-         unset CH
- fi
  DEF_STRIPFLAG="-s"
  
  TMPDIR="/tmp"
  
- # "o_FLAG" is used by "nightly.sh" (it may be useful to rename this
- # variable using a more descriptive name later)
- export o_FLAG="$(${flags.o} && print 'y' || print 'n')"
- 
  export \
          PATH TMPDIR \
          POUND_SIGN \
          DEF_STRIPFLAG \
          RELEASE_DATE
--- 300,313 ----