#!/bin/bash

  # Tool mainly for U-Boot Quality Assurance: build one or more board
  # configurations with minimal verbosity, showing only warnings and
  # errors.

  #
  # SPDX-License-Identifier:	GPL-2.0+

  usage()
  {
  	# if exiting with 0, write to stdout, else write to stderr
  	local ret=${1:-0}
  	[ "${ret}" -eq 1 ] && exec 1>&2
  	cat <<-EOF
  	Usage: MAKEALL [options] [--] [boards-to-build]
  
  	Options:
  	  -a ARCH,   --arch ARCH       Build all boards with arch ARCH
  	  -c CPU,    --cpu CPU         Build all boards with cpu CPU
  	  -v VENDOR, --vendor VENDOR   Build all boards with vendor VENDOR
  	  -s SOC,    --soc SOC         Build all boards with soc SOC

  	  -b BOARD,  --board BOARD     Build all boards with board name BOARD

  	  -l,        --list            List all targets to be built

  	  -m,        --maintainers     List all targets and maintainer email
  	  -M,        --mails           List all targets and all affilated emails

  	  -C,        --check           Enable build checking

  	  -n,        --continue        Continue (skip boards already built)
  	  -r,        --rebuild-errors  Rebuild any boards that errored

  	  -h,        --help            This help output
  
  	Selections by these options are logically ANDed; if the same option
  	is used repeatedly, such selections are ORed.  So "-v FOO -v BAR"
  	will select all configurations where the vendor is either FOO or
  	BAR.  Any additional arguments specified on the command line are
  	always build additionally.  See the boards.cfg file for more info.
  
  	If no boards are specified, then the default is "powerpc".
  
  	Environment variables:
  	  BUILD_NCPUS      number of parallel make jobs (default: auto)
  	  CROSS_COMPILE    cross-compiler toolchain prefix (default: "")

  	  CROSS_COMPILE_<ARCH> cross-compiler toolchain prefix for

  			   architecture "ARCH".  Substitute "ARCH" for any
  			   supported architecture (default: "")

  	  MAKEALL_LOGDIR   output all logs to here (default: ./LOG/)
  	  BUILD_DIR        output build directory (default: ./)

  	  BUILD_NBUILDS	   number of parallel targets (default: 1)

  
  	Examples:
  	  - build all Power Architecture boards:
  	      MAKEALL -a powerpc
  	      MAKEALL --arch powerpc
  	      MAKEALL powerpc
  	  - build all PowerPC boards manufactured by vendor "esd":
  	      MAKEALL -a powerpc -v esd
  	  - build all PowerPC boards manufactured either by "keymile" or "siemens":
  	      MAKEALL -a powerpc -v keymile -v siemens
  	  - build all Freescale boards with MPC83xx CPUs, plus all 4xx boards:
  	      MAKEALL -c mpc83xx -v freescale 4xx
  	EOF
  	exit ${ret}
  }

  SHORT_OPTS="ha:c:v:s:b:lmMCnr"
  LONG_OPTS="help,arch:,cpu:,vendor:,soc:,board:,list,maintainers,mails,check,continue,rebuild-errors"

  
  # Option processing based on util-linux-2.13/getopt-parse.bash

  # Note that we use `"$@"' to let each command-line parameter expand to a

  # separate word. The quotes around `$@' are essential!
  # We need TEMP as the `eval set --' would nuke the return value of
  # getopt.
  TEMP=`getopt -o ${SHORT_OPTS} --long ${LONG_OPTS} \
       -n 'MAKEALL' -- "$@"`

  [ $? != 0 ] && usage 1

  
  # Note the quotes around `$TEMP': they are essential!
  eval set -- "$TEMP"
  
  SELECTED=''

  ONLY_LIST=''

  PRINT_MAINTS=''
  MAINTAINERS_ONLY=''

  CONTINUE=''
  REBUILD_ERRORS=''

  
  while true ; do
  	case "$1" in
  	-a|--arch)
  		# echo "Option ARCH: argument \`$2'"
  		if [ "$opt_a" ] ; then
  			opt_a="${opt_a%)} || \$2 == \"$2\")"
  		else
  			opt_a="(\$2 == \"$2\")"
  		fi
  		SELECTED='y'
  		shift 2 ;;
  	-c|--cpu)
  		# echo "Option CPU: argument \`$2'"
  		if [ "$opt_c" ] ; then

  			opt_c="${opt_c%)} || \$3 == \"$2\" || \$3 ~ /$2:/)"

  		else

  			opt_c="(\$3 == \"$2\" || \$3 ~ /$2:/)"

  		fi
  		SELECTED='y'
  		shift 2 ;;
  	-s|--soc)
  		# echo "Option SoC: argument \`$2'"
  		if [ "$opt_s" ] ; then

  			opt_s="${opt_s%)} || \$4 == \"$2\" || \$4 ~ /$2/)"

  		else

  			opt_s="(\$4 == \"$2\" || \$4 ~ /$2/)"

  		fi
  		SELECTED='y'
  		shift 2 ;;
  	-v|--vendor)
  		# echo "Option VENDOR: argument \`$2'"
  		if [ "$opt_v" ] ; then
  			opt_v="${opt_v%)} || \$5 == \"$2\")"
  		else
  			opt_v="(\$5 == \"$2\")"
  		fi
  		SELECTED='y'
  		shift 2 ;;

  	-b|--board)
  		# echo "Option BOARD: argument \`$2'"
  		if [ "$opt_b" ] ; then
  			opt_b="${opt_b%)} || \$6 == \"$2\" || \$7 == \"$2\")"
  		else
  			# We need to check the 7th field too
  			# for boards whose 6th field is "-"
  			opt_b="(\$6 == \"$2\" || \$7 == \"$2\")"
  		fi
  		SELECTED='y'
  		shift 2 ;;

  	-C|--check)
  		CHECK='C=1'
  		shift ;;

  	-n|--continue)
  		CONTINUE='y'
  		shift ;;
  	-r|--rebuild-errors)
  		REBUILD_ERRORS='y'
  		shift ;;

  	-l|--list)
  		ONLY_LIST='y'
  		shift ;;

  	-m|--maintainers)
  		ONLY_LIST='y'
  		PRINT_MAINTS='y'
  		MAINTAINERS_ONLY='y'
  		shift ;;
  	-M|--mails)
  		ONLY_LIST='y'
  		PRINT_MAINTS='y'
  		shift ;;

  	-h|--help)
  		usage ;;

  	--)
  		shift ; break ;;
  	*)
  		echo "Internal error!" >&2 ; exit 1 ;;
  	esac
  done
  # echo "Remaining arguments:"
  # for arg do echo '--> '"\`$arg'" ; done
  
  FILTER="\$1 !~ /^#/"
  [ "$opt_a" ] && FILTER="${FILTER} && $opt_a"
  [ "$opt_c" ] && FILTER="${FILTER} && $opt_c"
  [ "$opt_s" ] && FILTER="${FILTER} && $opt_s"
  [ "$opt_v" ] && FILTER="${FILTER} && $opt_v"

  [ "$opt_b" ] && FILTER="${FILTER} && $opt_b"

  
  if [ "$SELECTED" ] ; then

  	SELECTED=$(awk '('"$FILTER"') { print $7 }' boards.cfg)

  
  	# Make sure some boards from boards.cfg are actually found
  	if [ -z "$SELECTED" ] ; then
  		echo "Error: No boards selected, invalid arguments"
  		exit 1
  	fi

  fi
  
  #########################################################################

  # Print statistics when we exit
  trap exit 1 2 3 15
  trap print_stats 0

  # Determine number of CPU cores if no default was set
  : ${BUILD_NCPUS:="`getconf _NPROCESSORS_ONLN`"}
  
  if [ "$BUILD_NCPUS" -gt 1 ]
  then

  	JOBS="-j $((BUILD_NCPUS + 1))"

  else
  	JOBS=""
  fi

  if [ "${MAKEALL_LOGDIR}" ] ; then
  	LOG_DIR=${MAKEALL_LOGDIR}
  else
  	LOG_DIR="LOG"
  fi

  : ${BUILD_NBUILDS:=1}
  BUILD_MANY=0
  
  if [ "${BUILD_NBUILDS}" -gt 1 ] ; then
  	BUILD_MANY=1
  	: ${BUILD_DIR:=./build}
  	mkdir -p "${BUILD_DIR}/ERR"
  	find "${BUILD_DIR}/ERR/" -type f -exec rm -f {} +

  fi

  : ${BUILD_DIR:=.}
  
  OUTPUT_PREFIX="${BUILD_DIR}"
  
  [ -d ${LOG_DIR} ] || mkdir "${LOG_DIR}" || exit 1

  if [ "$CONTINUE" != 'y' -a "$REBUILD_ERRORS" != 'y' ] ; then
  	find "${LOG_DIR}/" -type f -exec rm -f {} +
  fi

  
  LIST=""

  # Keep track of the number of builds and errors
  ERR_CNT=0
  ERR_LIST=""

  WRN_CNT=0
  WRN_LIST=""

  TOTAL_CNT=0

  SKIP_CNT=0

  CURRENT_CNT=0
  OLDEST_IDX=1

  RC=0

  # Helper funcs for parsing boards.cfg

  targets_by_field()

  {

  	field=$1
  	regexp=$2
  
  	awk '($1 !~ /^#/ && $'"$field"' ~ /^'"$regexp"'$/) { print $7 }' \
  								boards.cfg

  }

  targets_by_arch() { targets_by_field 2 "$@" ; }
  targets_by_cpu()  { targets_by_field 3 "$@" ; targets_by_field 3 "$@:.*" ; }
  targets_by_soc()  { targets_by_field 4 "$@" ; }

  #########################################################################

  ## MPC5xx Systems
  #########################################################################

  LIST_5xx="$(targets_by_cpu mpc5xx)"

  
  #########################################################################

  ## MPC5xxx Systems
  #########################################################################

  LIST_5xxx="$(targets_by_cpu mpc5xxx)"

  
  #########################################################################

  ## MPC512x Systems
  #########################################################################

  LIST_512x="$(targets_by_cpu mpc512x)"

  
  #########################################################################

  ## MPC8xx Systems
  #########################################################################

  LIST_8xx="$(targets_by_cpu mpc8xx)"

  
  #########################################################################
  ## PPC4xx Systems
  #########################################################################

  LIST_4xx="$(targets_by_cpu ppc4xx)"

  
  #########################################################################
  ## MPC824x Systems
  #########################################################################

  LIST_824x="$(targets_by_cpu mpc824x)"

  #########################################################################

  ## MPC8260 Systems (includes 8250, 8255 etc.)

  #########################################################################

  LIST_8260="$(targets_by_cpu mpc8260)"

  
  #########################################################################

  ## MPC83xx Systems (includes 8349, etc.)
  #########################################################################

  LIST_83xx="$(targets_by_cpu mpc83xx)"

  
  #########################################################################

  ## MPC85xx Systems (includes 8540, 8560 etc.)
  #########################################################################

  LIST_85xx="$(targets_by_cpu mpc85xx)"

  
  #########################################################################

  ## MPC86xx Systems
  #########################################################################

  LIST_86xx="$(targets_by_cpu mpc86xx)"

  
  #########################################################################

  ## 74xx/7xx Systems
  #########################################################################

  LIST_74xx_7xx="$(targets_by_cpu 74xx_7xx)"

  #########################################################################
  ## PowerPC groups
  #########################################################################
  
  LIST_TSEC="		\
  	${LIST_83xx}	\
  	${LIST_85xx}	\
  	${LIST_86xx}	\
  "

  LIST_powerpc="		\

  	${LIST_5xx}	\

  	${LIST_512x}	\

  	${LIST_5xxx}	\
  	${LIST_8xx}	\

  	${LIST_824x}	\
  	${LIST_8260}	\
  	${LIST_83xx}	\
  	${LIST_85xx}	\
  	${LIST_86xx}	\
  	${LIST_4xx}	\

  	${LIST_74xx_7xx}\

  "

  # Alias "ppc" -> "powerpc" to not break compatibility with older scripts
  # still using "ppc" instead of "powerpc"
  LIST_ppc="		\
  	${LIST_powerpc}	\
  "

  #########################################################################
  ## StrongARM Systems
  #########################################################################

  LIST_SA="$(targets_by_cpu sa1100)"

  
  #########################################################################

  ## ARM7 Systems
  #########################################################################

  LIST_ARM7="$(targets_by_cpu arm720t)"

  
  #########################################################################

  ## ARM9 Systems
  #########################################################################

  LIST_ARM9="$(targets_by_cpu arm920t)	\
  	$(targets_by_cpu arm926ejs)	\
  	$(targets_by_cpu arm946es)	\

  "

  
  #########################################################################

  ## ARM11 Systems
  #########################################################################

  LIST_ARM11="$(targets_by_cpu arm1136)	\
  	$(targets_by_cpu arm1176)	\

  "

  
  #########################################################################

  ## ARMV7 Systems

  #########################################################################

  LIST_ARMV7="$(targets_by_cpu armv7)"

  
  #########################################################################

  ## ARMV8 Systems
  #########################################################################
  
  LIST_ARMV8="$(targets_by_cpu armv8)"
  
  #########################################################################

  ## AT91 Systems
  #########################################################################

  LIST_at91="$(targets_by_soc at91)"

  
  #########################################################################

  ## Xscale Systems
  #########################################################################

  LIST_pxa="$(targets_by_cpu pxa)"

  #########################################################################

  ## SPEAr Systems
  #########################################################################

  LIST_spear="$(targets_by_soc spear)"

  
  #########################################################################

  ## ARM groups
  #########################################################################

  LIST_arm="$(targets_by_arch arm |		\
  	for ARMV8_TARGET in $LIST_ARMV8;	\
  		do sed "/$ARMV8_TARGET/d";	\
  	done)					\
  "

  #########################################################################

  ## MIPS Systems		(default = big endian)

  #########################################################################

  LIST_mips="$(targets_by_arch mips)"

  #########################################################################

  ## OpenRISC Systems
  #########################################################################

  LIST_openrisc="$(targets_by_arch openrisc)"

  
  #########################################################################

  ## x86 Systems

  #########################################################################

  LIST_x86="$(targets_by_arch x86)"

  #########################################################################

  ## Nios-II Systems
  #########################################################################

  LIST_nios2="$(targets_by_arch nios2)"

  
  #########################################################################

  ## MicroBlaze Systems
  #########################################################################

  LIST_microblaze="$(targets_by_arch microblaze)"

  #########################################################################
  ## ColdFire Systems
  #########################################################################

  LIST_m68k="$(targets_by_arch m68k)"

  LIST_coldfire=${LIST_m68k}

  #########################################################################
  ## AVR32 Systems
  #########################################################################

  LIST_avr32="$(targets_by_arch avr32)"

  #########################################################################
  ## Blackfin Systems
  #########################################################################

  LIST_blackfin="$(targets_by_arch blackfin)"

  #########################################################################
  ## SH Systems
  #########################################################################

  LIST_sh2="$(targets_by_cpu sh2)"
  LIST_sh3="$(targets_by_cpu sh3)"
  LIST_sh4="$(targets_by_cpu sh4)"

  LIST_sh="$(targets_by_arch sh)"

  #########################################################################
  ## SPARC Systems
  #########################################################################

  LIST_sparc="$(targets_by_arch sparc)"

  #########################################################################
  ## NDS32 Systems
  #########################################################################

  LIST_nds32="$(targets_by_arch nds32)"

  #########################################################################
  ## ARC Systems
  #########################################################################
  
  LIST_arc="$(targets_by_arch arc)"

  #-----------------------------------------------------------------------

  get_target_location() {
  	local target=$1
  	local BOARD_NAME=""
  	local CONFIG_NAME=""
  	local board=""
  	local vendor=""
  
  	# Automatic mode

  	local line=`awk '\$7 == "'"$target"'" { print \$0 }' boards.cfg`

  	if [ -z "${line}" ] ; then echo "" ; return ; fi
  
  	set ${line}

  	CONFIG_NAME="${7%_config}"

  	[ "${BOARD_NAME}" ] || BOARD_NAME="${7%_config}"

  	if [ $# -gt 5 ]; then
  		if [ "$6" = "-" ] ; then
  			board=${BOARD_NAME}
  		else
  			board="$6"
  		fi

  	fi
  
  	[ $# -gt 4 ] && [ "$5" != "-" ] && vendor="$5"

  	[ $# -gt 6 ] && [ "$8" != "-" ] && {
  		tmp="${8%:*}"

  		if [ "$tmp" ] ; then
  			CONFIG_NAME="$tmp"
  		fi
  	}
  
  	# Assign board directory to BOARDIR variable

  	if [ "${vendor}" == "-" ] ; then

  	    BOARDDIR=${board}
  	else
  	    BOARDDIR=${vendor}/${board}
  	fi

  	echo "${CONFIG_NAME}:${BOARDDIR}:${BOARD_NAME}"

  }
  
  get_target_maintainers() {

  	local name=`echo $1 | cut -d : -f 3`

  	local line=`awk '\$7 == "'"$target"'" { print \$0 }' boards.cfg`

  	if [ -z "${line}" ]; then

  		echo ""
  		return ;
  	fi

  	local mails=`echo ${line} | cut -d ' ' -f 9- | sed -e 's/[^<]*<//' -e 's/>.*</ /' -e 's/>[^>]*$//'`
  	[ "$mails" == "-" ] && mails=""
  	echo "$mails"

  }

  get_target_arch() {
  	local target=$1
  
  	# Automatic mode

  	local line=`awk '\$7 == "'"$target"'" { print \$0 }' boards.cfg`

  
  	if [ -z "${line}" ] ; then echo "" ; return ; fi
  
  	set ${line}
  	echo "$2"
  }

  list_target() {
  	if [ "$PRINT_MAINTS" != 'y' ] ; then
  		echo "$1"
  		return
  	fi
  
  	echo -n "$1:"
  
  	local loc=`get_target_location $1`
  
  	if [ -z "${loc}" ] ; then echo "ERROR" ; return ; fi
  
  	local maintainers_result=`get_target_maintainers ${loc} | tr " " "
  "`
  
  	if [ "$MAINTAINERS_ONLY" != 'y' ] ; then
  
  		local dir=`echo ${loc} | cut -d ":" -f 2`
  		local cfg=`echo ${loc} | cut -d ":" -f 1`
  		local git_result=`git log --format=%aE board/${dir} \
  				include/configs/${cfg}.h | grep "@"`
  		local git_result_recent=`echo ${git_result} | tr " " "
  " | \
  						head -n 3`
  		local git_result_top=`echo ${git_result} | tr " " "
  " | \
  			sort | uniq -c | sort -nr | head -n 3 | \
  			sed "s/^ \+[0-9]\+ \+//"`
  
  		echo -e "$git_result_recent
  $git_result_top
  $maintainers_result" | \
  			sort -u | tr "
  " " " | sed "s/ $//" ;
  	else
  		echo -e "$maintainers_result" | sort -u | tr "
  " " " | \
  						sed "s/ $//" ;
  	fi
  
  	echo ""
  }

  # Each finished build will have a file called ${donep}${n},
  # where n is the index of the build. Each build
  # we've already noted as finished will have ${skipp}${n}.
  # The code managing the build process will use this information
  # to ensure that only BUILD_NBUILDS builds are in flight at once
  donep="${LOG_DIR}/._done_"
  skipp="${LOG_DIR}/._skip_"

  build_target_killed() {
  	echo "Aborted $target build."
  	# Remove the logs for this board since it was aborted
  	rm -f ${LOG_DIR}/$target.MAKELOG ${LOG_DIR}/$target.ERR
  	exit
  }

  build_target() {
  	target=$1

  	build_idx=$2

  	if [ "$ONLY_LIST" == 'y' ] ; then
  		list_target ${target}
  		return
  	fi

  	if [ $BUILD_MANY == 1 ] ; then
  		output_dir="${OUTPUT_PREFIX}/${target}"
  		mkdir -p "${output_dir}"

  		trap build_target_killed TERM

  	else
  		output_dir="${OUTPUT_PREFIX}"
  	fi

  	target_arch=$(get_target_arch ${target})

  	eval cross_toolchain=\$CROSS_COMPILE_`echo $target_arch | tr '[:lower:]' '[:upper:]'`

  	if [ "${cross_toolchain}" ] ; then
  	    MAKE="make CROSS_COMPILE=${cross_toolchain}"
  	elif [ "${CROSS_COMPILE}" ] ; then
  	    MAKE="make CROSS_COMPILE=${CROSS_COMPILE}"
  	else
  	    MAKE=make
  	fi

  	if [  "${output_dir}" != "." ] ; then
  		MAKE="${MAKE} O=${output_dir}"
  	fi

  	${MAKE} distclean >/dev/null

  	${MAKE} -s ${target}_config

  	${MAKE} ${JOBS} ${CHECK} all \

  		>${LOG_DIR}/$target.MAKELOG 2> ${LOG_DIR}/$target.ERR

  
  	# Check for 'make' errors
  	if [ ${PIPESTATUS[0]} -ne 0 ] ; then
  		RC=1
  	fi

  	if [ $BUILD_MANY == 1 ] ; then

  		trap - TERM

  		${MAKE} -s clean

  
  		if [ -s ${LOG_DIR}/${target}.ERR ] ; then

  			cp ${LOG_DIR}/${target}.ERR ${OUTPUT_PREFIX}/ERR/${target}

  		else
  			rm ${LOG_DIR}/${target}.ERR
  		fi

  	else

  		if [ -s ${LOG_DIR}/${target}.ERR ] ; then

  			if grep -iw error ${LOG_DIR}/${target}.ERR ; then
  				: $(( ERR_CNT += 1 ))
  				ERR_LIST="${ERR_LIST} $target"
  			else
  				: $(( WRN_CNT += 1 ))
  				WRN_LIST="${WRN_LIST} $target"
  			fi

  		else
  			rm ${LOG_DIR}/${target}.ERR
  		fi

  	fi

  	OBJS=${output_dir}/u-boot
  	if [ -e ${output_dir}/spl/u-boot-spl ]; then
  		OBJS="${OBJS} ${output_dir}/spl/u-boot-spl"

  	fi
  
  	${CROSS_COMPILE}size ${OBJS} | tee -a ${LOG_DIR}/$target.MAKELOG

  
  	[ -e "${LOG_DIR}/${target}.ERR" ] && cat "${LOG_DIR}/${target}.ERR"

  	touch "${donep}${build_idx}"

  }

  
  manage_builds() {
  	search_idx=${OLDEST_IDX}

  	if [ "$ONLY_LIST" == 'y' ] ; then return ; fi

  	while true; do
  		if [ -e "${donep}${search_idx}" ] ; then

  			: $(( CURRENT_CNT-- ))
  			[ ${OLDEST_IDX} -eq ${search_idx} ] &&
  				: $(( OLDEST_IDX++ ))
  
  			# Only want to count it once
  			rm -f "${donep}${search_idx}"
  			touch "${skipp}${search_idx}"
  		elif [ -e "${skipp}${search_idx}" ] ; then
  			[ ${OLDEST_IDX} -eq ${search_idx} ] &&
  				: $(( OLDEST_IDX++ ))
  		fi

  		: $(( search_idx++ ))
  		if [ ${search_idx} -gt ${TOTAL_CNT} ] ; then

  			if [ ${CURRENT_CNT} -ge ${BUILD_NBUILDS} ] ; then
  				search_idx=${OLDEST_IDX}
  				sleep 1
  			else
  				break
  			fi
  		fi
  	done
  }

  build_targets() {
  	for t in "$@" ; do
  		# If a LIST_xxx var exists, use it.  But avoid variable
  		# expansion in the eval when a board name contains certain
  		# characters that the shell interprets.
  		case ${t} in
  			*[-+=]*) list= ;;
  			*)       list=$(eval echo '${LIST_'$t'}') ;;
  		esac
  		if [ -n "${list}" ] ; then
  			build_targets ${list}
  		else

  			: $((TOTAL_CNT += 1))
  			: $((CURRENT_CNT += 1))
  			rm -f "${donep}${TOTAL_CNT}"
  			rm -f "${skipp}${TOTAL_CNT}"

  			if [ "$CONTINUE" = 'y' -a -e ${LOG_DIR}/$t.MAKELOG ] ; then
  				: $((SKIP_CNT += 1))
  				touch "${donep}${TOTAL_CNT}"
  			elif [ "$REBUILD_ERRORS" = 'y' -a ! -e ${LOG_DIR}/$t.ERR ] ; then
  				: $((SKIP_CNT += 1))
  				touch "${donep}${TOTAL_CNT}"

  			else

  				if [ $BUILD_MANY == 1 ] ; then
  					build_target ${t} ${TOTAL_CNT} &
  				else
  					CUR_TGT="${t}"
  					build_target ${t} ${TOTAL_CNT}
  					CUR_TGT=''
  				fi

  			fi

  		fi
  
  		# We maintain a running count of all the builds we have done.
  		# Each finished build will have a file called ${donep}${n},
  		# where n is the index of the build. Each build
  		# we've already noted as finished will have ${skipp}${n}.
  		# We track the current index via TOTAL_CNT, and the oldest
  		# index. When we exceed the maximum number of parallel builds,
  		# We look from oldest to current for builds that have completed,
  		# and update the current count and oldest index as appropriate.
  		# If we've gone through the entire list, wait a second, and
  		# reprocess the entire list until we find a build that has
  		# completed
  		if [ ${CURRENT_CNT} -ge ${BUILD_NBUILDS} ] ; then
  			manage_builds

  		fi
  	done
  }

  
  #-----------------------------------------------------------------------

  kill_children() {

  	local OS=$(uname -s)
  	local children=""
  	case "${OS}" in
  		"Darwin")
  			# Mac OS X is known to have BSD style ps
  			local pgid=$(ps -p $$ -o pgid | sed -e "/PGID/d")
  			children=$(ps -g $pgid -o pid | sed -e "/PID\|$$\|$pgid/d")
  			;;
  		*)
  			# everything else tries the GNU style
  			local pgid=$(ps -p $$ --no-headers -o "%r" | tr -d ' ')
  			children=$(pgrep -g $pgid | sed -e "/$$\|$pgid/d")
  			;;
  	esac

  
  	kill $children 2> /dev/null
  	wait $children 2> /dev/null

  
  	exit
  }

  print_stats() {

  	if [ "$ONLY_LIST" == 'y' ] ; then return ; fi

  	# Only count boards that completed
  	: $((TOTAL_CNT = `find ${skipp}* 2> /dev/null | wc -l`))

  	rm -f ${donep}* ${skipp}*
  
  	if [ $BUILD_MANY == 1 ] && [ -e "${OUTPUT_PREFIX}/ERR" ] ; then

  		ERR_LIST=`grep -riwl error ${OUTPUT_PREFIX}/ERR/`

  		ERR_LIST=`for f in $ERR_LIST ; do echo -n " $(basename $f)" ; done`
  		ERR_CNT=`echo $ERR_LIST | wc -w | awk '{print $1}'`

  		WRN_LIST=`grep -riwL error ${OUTPUT_PREFIX}/ERR/`

  		WRN_LIST=`for f in $WRN_LIST ; do echo -n " $(basename $f)" ; done`
  		WRN_CNT=`echo $WRN_LIST | wc -w | awk '{print $1}'`

  	else
  		# Remove the logs for any board that was interrupted
  		rm -f ${LOG_DIR}/${CUR_TGT}.MAKELOG ${LOG_DIR}/${CUR_TGT}.ERR

  	fi

  	: $((TOTAL_CNT -= ${SKIP_CNT}))

  	echo ""
  	echo "--------------------- SUMMARY ----------------------------"

  	if [ "$CONTINUE" = 'y' -o "$REBUILD_ERRORS" = 'y' ] ; then
  		echo "Boards skipped: ${SKIP_CNT}"
  	fi

  	echo "Boards compiled: ${TOTAL_CNT}"
  	if [ ${ERR_CNT} -gt 0 ] ; then

  		echo "Boards with errors: ${ERR_CNT} (${ERR_LIST} )"
  	fi
  	if [ ${WRN_CNT} -gt 0 ] ; then
  		echo "Boards with warnings but no errors: ${WRN_CNT} (${WRN_LIST} )"

  	fi
  	echo "----------------------------------------------------------"

  	if [ $BUILD_MANY == 1 ] ; then

  		kill_children

  	fi

  	exit $RC

  }

  #-----------------------------------------------------------------------

  # Build target groups selected by options, plus any command line args
  set -- ${SELECTED} "$@"
  # run PowerPC by default

  [ $# = 0 ] && set -- powerpc

  build_targets "$@"

  wait