#

# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.

# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

#

# This code is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License version 2 only, as

# published by the Free Software Foundation.  Oracle designates this

# particular file as subject to the "Classpath" exception as provided

# by Oracle in the LICENSE file that accompanied this code.

#

# This code is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

# version 2 for more details (a copy is included in the LICENSE file that

# accompanied this code).

#

# You should have received a copy of the GNU General Public License version

# 2 along with this work; if not, write to the Free Software Foundation,

# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

#

# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

# or visit www.oracle.com if you need additional information or have any

# questions.

#

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

#

# Setup common utility functions.

#

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

ifndef _MAKEBASE_GMK

_MAKEBASE_GMK := 1

ifeq ($(wildcard $(SPEC)),)

  $(error MakeBase.gmk needs SPEC set to a proper spec.gmk)

endif

# By defining this pseudo target, make will automatically remove targets

# if their recipe fails so that a rebuild is automatically triggered on the

# next make invocation.

.DELETE_ON_ERROR:

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

# Definitions for special characters

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

# When calling macros, the spaces between arguments are

# often semantically important! Sometimes we need to subst

# spaces and commas, therefore we need the following macros.

X:=

SPACE:=$(X) $(X)

COMMA:=,

DOLLAR:=$$

HASH:=\#

LEFT_PAREN:=(

RIGHT_PAREN:=)

SQUOTE:='

#'

DQUOTE:="

#"

define NEWLINE

endef

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

# Functions

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

### Debug functions

# Prints the name and value of a variable

PrintVar = \

    $(info $(strip $1) >$($(strip $1))<)

### Functions for timers

# Store the build times in this directory.

BUILDTIMESDIR=$(OUTPUT_ROOT)/make-support/build-times

# Record starting time for build of a sub repository.

define RecordStartTime

	$(MKDIR) -p $(BUILDTIMESDIR)

	$(DATE) '+%Y %m %d %H %M %S' | $(NAWK) '{ print $$1,$$2,$$3,$$4,$$5,$$6,($$4*3600+$$5*60+$$6) }' > $(BUILDTIMESDIR)/build_time_start_$(strip $1)

	$(DATE) '+%Y-%m-%d %H:%M:%S' > $(BUILDTIMESDIR)/build_time_start_$(strip $1)_human_readable

endef

# Record ending time and calculate the difference and store it in a

# easy to read format. Handles builds that cross midnight. Expects

# that a build will never take 24 hours or more.

define RecordEndTime

	$(DATE) '+%Y %m %d %H %M %S' | $(NAWK) '{ print $$1,$$2,$$3,$$4,$$5,$$6,($$4*3600+$$5*60+$$6) }' > $(BUILDTIMESDIR)/build_time_end_$(strip $1)

	$(DATE) '+%Y-%m-%d %H:%M:%S' > $(BUILDTIMESDIR)/build_time_end_$(strip $1)_human_readable

	$(ECHO) `$(CAT) $(BUILDTIMESDIR)/build_time_start_$(strip $1)` `$(CAT) $(BUILDTIMESDIR)/build_time_end_$(strip $1)` $1 | \

	    $(NAWK) '{ F=$$7; T=$$14; if (F > T) { T+=3600*24 }; D=T-F; H=int(D/3600); \

	    M=int((D-H*3600)/60); S=D-H*3600-M*60; printf("%02d:%02d:%02d %s\n",H,M,S,$$15); }' \

	    > $(BUILDTIMESDIR)/build_time_diff_$(strip $1)

endef

# Hook to be called when starting to execute a top-level target

define TargetEnter

	$(PRINTF) "## Starting $(patsubst %-only,%,$@)\n"

	$(call RecordStartTime,$(patsubst %-only,%,$@))

endef

# Hook to be called when finish executing a top-level target

define TargetExit

	$(call RecordEndTime,$(patsubst %-only,%,$@))

	$(PRINTF) "## Finished $(patsubst %-only,%,$@) (build time %s)\n\n" \

	    "`$(CAT) $(BUILDTIMESDIR)/build_time_diff_$(patsubst %-only,%,$@) | $(CUT) -f 1 -d ' '`"

endef

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

# This macro translates $ into \$ to protect the $ from expansion in the shell.

# To make this macro resilient against already escaped strings, first remove

# any present escapes before escaping so that no double escapes are added.

EscapeDollar = $(subst $$,\$$,$(subst \$$,$$,$(strip $1)))

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

# This macro translates $ into $$ to protect the string from make itself.

DoubleDollar = $(subst $$,$$$$,$(strip $1))

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

# If the variable that you want to send to stdout for piping into a file or otherwise,

# is potentially long, for example the a list of file paths, eg a list of all package directories.

# Then you need to use ListPathsSafely, which optimistically splits the output into several shell

# calls as well as use compression on recurrent file paths segments, to get around the potential

# command line length problem that exists in cygwin and other shells.

compress_pre:=$(strip $(shell $(CAT) $(SRC_ROOT)/make/common/support/ListPathsSafely-pre-compress.incl))

compress_post:=$(strip $(shell $(CAT) $(SRC_ROOT)/make/common/support/ListPathsSafely-post-compress.incl))

compress_paths=$(compress_pre)\

$(subst $(SRC_ROOT),X97,\

$(subst $(OUTPUT_ROOT),X98,\

$(subst X,X00,\

$(subst $(SPACE),\n,$(strip $1)))))\

$(compress_post)

decompress_paths=$(SED) -f $(SRC_ROOT)/make/common/support/ListPathsSafely-uncompress.sed -e 's|X99|\\n|g' \

    -e 's|X98|$(OUTPUT_ROOT)|g' -e 's|X97|$(SRC_ROOT)|g' \

    -e 's|X00|X|g' | tr '\n' '$2'

define ListPathsSafely_If

	$(if $(word $3,$($1)),$(eval $1_LPS$3:=$(call compress_paths,$(wordlist $3,$4,$($1)))))

endef

define ListPathsSafely_Printf

	$(if $(strip $($1_LPS$4)),$(if $(findstring $(LOG_LEVEL),trace),,@)printf \

	    -- "$(strip $(call EscapeDollar, $($1_LPS$4)))\n" | $(decompress_paths) $3)

endef

# Receipt example:

#   rm -f thepaths

#   $(call ListPathsSafely,THEPATHS,\n, >> thepaths)

# The \n argument means translate spaces into \n

# if instead , , (a space) is supplied, then spaces remain spaces.

define ListPathsSafely

	$(if $(word 16001,$($1)),$(error Cannot list safely more than 16000 paths. $1 has $(words $($1)) paths!))

	$(ECHO) $(LOG_DEBUG) Writing $(words $($1)) paths to '$3'

	$(call ListPathsSafely_If,$1,$2,1,250)

	$(call ListPathsSafely_If,$1,$2,251,500)

	$(call ListPathsSafely_If,$1,$2,501,750)

	$(call ListPathsSafely_If,$1,$2,751,1000)

	$(call ListPathsSafely_If,$1,$2,1001,1250)

	$(call ListPathsSafely_If,$1,$2,1251,1500)

	$(call ListPathsSafely_If,$1,$2,1501,1750)

	$(call ListPathsSafely_If,$1,$2,1751,2000)

	$(call ListPathsSafely_If,$1,$2,2001,2250)

	$(call ListPathsSafely_If,$1,$2,2251,2500)

	$(call ListPathsSafely_If,$1,$2,2501,2750)

	$(call ListPathsSafely_If,$1,$2,2751,3000)

	$(call ListPathsSafely_If,$1,$2,3001,3250)

	$(call ListPathsSafely_If,$1,$2,3251,3500)

	$(call ListPathsSafely_If,$1,$2,3501,3750)

	$(call ListPathsSafely_If,$1,$2,3751,4000)

	$(call ListPathsSafely_If,$1,$2,4001,4250)

	$(call ListPathsSafely_If,$1,$2,4251,4500)

	$(call ListPathsSafely_If,$1,$2,4501,4750)

	$(call ListPathsSafely_If,$1,$2,4751,5000)

	$(call ListPathsSafely_If,$1,$2,5001,5250)

	$(call ListPathsSafely_If,$1,$2,5251,5500)

	$(call ListPathsSafely_If,$1,$2,5501,5750)

	$(call ListPathsSafely_If,$1,$2,5751,6000)

	$(call ListPathsSafely_If,$1,$2,6001,6250)

	$(call ListPathsSafely_If,$1,$2,6251,6500)

	$(call ListPathsSafely_If,$1,$2,6501,6750)

	$(call ListPathsSafely_If,$1,$2,6751,7000)

	$(call ListPathsSafely_If,$1,$2,7001,7250)

	$(call ListPathsSafely_If,$1,$2,7251,7500)

	$(call ListPathsSafely_If,$1,$2,7501,7750)

	$(call ListPathsSafely_If,$1,$2,7751,8000)

	$(call ListPathsSafely_If,$1,$2,8001,8250)

	$(call ListPathsSafely_If,$1,$2,8251,8500)

	$(call ListPathsSafely_If,$1,$2,8501,8750)

	$(call ListPathsSafely_If,$1,$2,8751,9000)

	$(call ListPathsSafely_If,$1,$2,9001,9250)

	$(call ListPathsSafely_If,$1,$2,9251,9500)

	$(call ListPathsSafely_If,$1,$2,9501,9750)

	$(call ListPathsSafely_If,$1,$2,9751,10000)

	$(call ListPathsSafely_If,$1,$2,10001,10250)

	$(call ListPathsSafely_If,$1,$2,10251,10500)

	$(call ListPathsSafely_If,$1,$2,10501,10750)

	$(call ListPathsSafely_If,$1,$2,10751,11000)

	$(call ListPathsSafely_If,$1,$2,11001,11250)

	$(call ListPathsSafely_If,$1,$2,11251,11500)

	$(call ListPathsSafely_If,$1,$2,11501,11750)

	$(call ListPathsSafely_If,$1,$2,11751,12000)

	$(call ListPathsSafely_If,$1,$2,12001,12250)

	$(call ListPathsSafely_If,$1,$2,12251,12500)

	$(call ListPathsSafely_If,$1,$2,12501,12750)

	$(call ListPathsSafely_If,$1,$2,12751,13000)

	$(call ListPathsSafely_If,$1,$2,13001,13250)

	$(call ListPathsSafely_If,$1,$2,13251,13500)

	$(call ListPathsSafely_If,$1,$2,13501,13750)

	$(call ListPathsSafely_If,$1,$2,13751,14000)

	$(call ListPathsSafely_If,$1,$2,14001,14250)

	$(call ListPathsSafely_If,$1,$2,14251,14500)

	$(call ListPathsSafely_If,$1,$2,14501,14750)

	$(call ListPathsSafely_If,$1,$2,14751,15000)

	$(call ListPathsSafely_If,$1,$2,15001,15250)

	$(call ListPathsSafely_If,$1,$2,15251,15500)

	$(call ListPathsSafely_If,$1,$2,15501,15750)

	$(call ListPathsSafely_If,$1,$2,15751,16000)

	$(call ListPathsSafely_Printf,$1,$2,$3,1)

	$(call ListPathsSafely_Printf,$1,$2,$3,251)

	$(call ListPathsSafely_Printf,$1,$2,$3,501)

	$(call ListPathsSafely_Printf,$1,$2,$3,751)

	$(call ListPathsSafely_Printf,$1,$2,$3,1001)

	$(call ListPathsSafely_Printf,$1,$2,$3,1251)

	$(call ListPathsSafely_Printf,$1,$2,$3,1501)

	$(call ListPathsSafely_Printf,$1,$2,$3,1751)

	$(call ListPathsSafely_Printf,$1,$2,$3,2001)

	$(call ListPathsSafely_Printf,$1,$2,$3,2251)

	$(call ListPathsSafely_Printf,$1,$2,$3,2501)

	$(call ListPathsSafely_Printf,$1,$2,$3,2751)

	$(call ListPathsSafely_Printf,$1,$2,$3,3001)

	$(call ListPathsSafely_Printf,$1,$2,$3,3251)

	$(call ListPathsSafely_Printf,$1,$2,$3,3501)

	$(call ListPathsSafely_Printf,$1,$2,$3,3751)

	$(call ListPathsSafely_Printf,$1,$2,$3,4001)

	$(call ListPathsSafely_Printf,$1,$2,$3,4251)

	$(call ListPathsSafely_Printf,$1,$2,$3,4501)

	$(call ListPathsSafely_Printf,$1,$2,$3,4751)

	$(call ListPathsSafely_Printf,$1,$2,$3,5001)

	$(call ListPathsSafely_Printf,$1,$2,$3,5251)

	$(call ListPathsSafely_Printf,$1,$2,$3,5501)

	$(call ListPathsSafely_Printf,$1,$2,$3,5751)

	$(call ListPathsSafely_Printf,$1,$2,$3,6001)

	$(call ListPathsSafely_Printf,$1,$2,$3,6251)

	$(call ListPathsSafely_Printf,$1,$2,$3,6501)

	$(call ListPathsSafely_Printf,$1,$2,$3,6751)

	$(call ListPathsSafely_Printf,$1,$2,$3,7001)

	$(call ListPathsSafely_Printf,$1,$2,$3,7251)

	$(call ListPathsSafely_Printf,$1,$2,$3,7501)

	$(call ListPathsSafely_Printf,$1,$2,$3,7751)

	$(call ListPathsSafely_Printf,$1,$2,$3,8001)

	$(call ListPathsSafely_Printf,$1,$2,$3,8251)

	$(call ListPathsSafely_Printf,$1,$2,$3,8501)

	$(call ListPathsSafely_Printf,$1,$2,$3,8751)

	$(call ListPathsSafely_Printf,$1,$2,$3,9001)

	$(call ListPathsSafely_Printf,$1,$2,$3,9251)

	$(call ListPathsSafely_Printf,$1,$2,$3,9501)

	$(call ListPathsSafely_Printf,$1,$2,$3,9751)

	$(call ListPathsSafely_Printf,$1,$2,$3,10001)

	$(call ListPathsSafely_Printf,$1,$2,$3,10251)

	$(call ListPathsSafely_Printf,$1,$2,$3,10501)

	$(call ListPathsSafely_Printf,$1,$2,$3,10751)

	$(call ListPathsSafely_Printf,$1,$2,$3,11001)

	$(call ListPathsSafely_Printf,$1,$2,$3,11251)

	$(call ListPathsSafely_Printf,$1,$2,$3,11501)

	$(call ListPathsSafely_Printf,$1,$2,$3,11751)

	$(call ListPathsSafely_Printf,$1,$2,$3,12001)

	$(call ListPathsSafely_Printf,$1,$2,$3,12251)

	$(call ListPathsSafely_Printf,$1,$2,$3,12501)

	$(call ListPathsSafely_Printf,$1,$2,$3,12751)

	$(call ListPathsSafely_Printf,$1,$2,$3,13001)

	$(call ListPathsSafely_Printf,$1,$2,$3,13251)

	$(call ListPathsSafely_Printf,$1,$2,$3,13501)

	$(call ListPathsSafely_Printf,$1,$2,$3,13751)

	$(call ListPathsSafely_Printf,$1,$2,$3,14001)

	$(call ListPathsSafely_Printf,$1,$2,$3,14251)

	$(call ListPathsSafely_Printf,$1,$2,$3,14501)

	$(call ListPathsSafely_Printf,$1,$2,$3,14751)

	$(call ListPathsSafely_Printf,$1,$2,$3,15001)

	$(call ListPathsSafely_Printf,$1,$2,$3,15251)

	$(call ListPathsSafely_Printf,$1,$2,$3,15501)

	$(call ListPathsSafely_Printf,$1,$2,$3,15751)

endef

define ListPathsSafelyNow_IfPrintf

  ifneq (,$$(word $4,$$($1)))

    $$(eval $1_LPS$4:=$$(call compress_paths,$$(wordlist $4,$5,$$($1))))

    $$(shell printf -- "$$(strip $$($1_LPS$4))\n" | $(decompress_paths) $3)

  endif

endef

# And an non-receipt version:

define ListPathsSafelyNow

  ifneq (,$$(word 10001,$$($1)))

    $$(error Cannot list safely more than 10000 paths. $1 has $$(words $$($1)) paths!)

  endif

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,1,250)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,251,500)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,501,750)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,751,1000)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,1001,1250)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,1251,1500)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,1501,1750)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,1751,2000)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,2001,2250)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,2251,2500)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,2501,2750)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,2751,3000)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,3001,3250)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,3251,3500)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,3501,3750)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,3751,4000)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,4001,4250)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,4251,4500)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,4501,4750)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,4751,5000)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,5001,5250)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,5251,5500)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,5501,5750)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,5751,6000)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,6001,6250)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,6251,6500)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,6501,6750)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,6751,7000)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,7001,7250)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,7251,7500)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,7501,7750)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,7751,8000)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,8001,8250)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,8251,8500)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,8501,8750)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,8751,9000)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,9001,9250)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,9251,9500)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,9501,9750)

  $(call ListPathsSafelyNow_IfPrintf,$1,$2,$3,9751,10000)

endef

# The source tips can come from the Mercurial repository, or in the files

# $(HGTIP_FILENAME) which contains the tip but is also positioned in the same

# directory as the original $(HGDIR) directory.

# These should not be := assignments, only used from the root Makefile.

HG_VERSION = $(shell $(HG) version 2> /dev/null)

HG_DIRECTORY=.hg

HGTIP_FILENAME=.hgtip

HG_SEARCH = ./REPO ./*/REPO ./*/*/REPO ./*/*/*/REPO

REPO_LIST = $(patsubst ./%,%,$(patsubst %/,%,$(sort $(dir \

    $(shell $(CD) $(SRC_ROOT) ; \

        $(LS) -d $(HG_SEARCH:%/REPO=%/$(HG_DIRECTORY)) \

            $(HG_SEARCH:%/REPO=%/$(HGTIP_FILENAME)) \

        2> /dev/null)))))

# Emit the repo:tip pairs to $@

define GetSourceTips

	$(CD) $(SRC_ROOT) ; \

	for i in $(REPO_LIST) IGNORE ; do \

	  if [ "$${i}" = "IGNORE" ] ; then \

	    continue; \

	  elif [ -d $${i}/$(HG_DIRECTORY) -a "$(HG_VERSION)" != "" ] ; then \

	    $(PRINTF) " %s:%s" \

	        "$${i}" `$(HG) tip --repository $${i} --template '{node|short}\n'` ; \

	  elif [ -f $${i}/$(HGTIP_FILENAME) ] ; then \

	    $(PRINTF) " %s:%s" \

	        "$${i}" `$(CAT) $${i}/$(HGTIP_FILENAME)` ; \

	  fi; \

	done >> $@

	$(PRINTF) "\n" >> $@

endef

# Create the HGTIP_FILENAME file. Called from jdk/make/closed/bundles.gmk

define CreateHgTip

	$(HG) tip --repository $1 --template '{node|short}\n' > $1/$(HGTIP_FILENAME); \

	$(ECHO) $1/$(HGTIP_FILENAME)

endef

define SetupLogging

  ifeq ($$(LOG_LEVEL), trace)

    # Shell redefinition trick inspired by http://www.cmcrossroads.com/ask-mr-make/6535-tracing-rule-execution-in-gnu-make

    # For each target executed, will print

    # Building <TARGET> (from <FIRST PREREQUISITE>) (<ALL NEWER PREREQUISITES> newer)

    # but with a limit of 20 on <ALL NEWER PREREQUISITES>, to avoid cluttering logs too much

    # (and causing a crash on Cygwin).

    # Default shell seems to always be /bin/sh. Must override with bash to get this to work on Solaris.

    # Only use time if it's GNU time which supports format and output file.

    WRAPPER_SHELL := $$(BASH) $$(SRC_ROOT)/common/bin/shell-tracer.sh $$(if $$(findstring yes,$$(IS_GNU_TIME)),$$(TIME),-) $$(OUTPUT_ROOT)/build-trace-time.log $$(SHELL)

    SHELL := $$(warning $$(if $$@,Building $$@,Running shell command) $$(if $$<, (from $$<))$$(if $$?, ($$(wordlist 1, 20, $$?) $$(if $$(wordlist 21, 22, $$?), ... [in total $$(words $$?) files]) newer)))$$(WRAPPER_SHELL)

  endif

  # Never remove warning messages; this is just for completeness

  LOG_WARN :=

  ifneq ($$(findstring $$(LOG_LEVEL), info debug trace),)

    LOG_INFO :=

  else

    LOG_INFO := > /dev/null

  endif

  ifneq ($$(findstring $$(LOG_LEVEL), debug trace),)

    LOG_DEBUG :=

  else

    LOG_DEBUG := > /dev/null

  endif

  ifneq ($$(findstring $$(LOG_LEVEL), trace),)

    LOG_TRACE :=

  else

    LOG_TRACE := > /dev/null

  endif

endef

# Make sure logging is setup for everyone that includes MakeBase.gmk.

$(eval $(call SetupLogging))

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

# Creates a sequence of increasing numbers (inclusive).

# Param 1 - starting number

# Param 2 - ending number

sequence = \

    $(wordlist $1, $2, $(strip \

        $(eval SEQUENCE_COUNT :=) \

        $(call _sequence-do,$(strip $2))))

_sequence-do = \

    $(if $(word $1, $(SEQUENCE_COUNT)),, \

      $(eval SEQUENCE_COUNT += .) \

      $(words $(SEQUENCE_COUNT)) \

      $(call _sequence-do,$1))

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

MAX_PARAMS := 30

PARAM_SEQUENCE := $(call sequence, 2, $(MAX_PARAMS))

# Template for creating a macro taking named parameters. To use it, assign the

# template to a variable with the name you want for your macro, using '='

# assignment. Then define a macro body with the suffix "Body". The Body macro

# should take 1 parameter which should be a unique string for that invocation

# of the macro.

# Ex:

# SetupFoo = $(NamedParamsMacroTemplate)

# define SetupFooBody

#   # do something

#   # access parameters as $$($1_BAR)

# endef

# Call it like this

# $(eval $(call SetupFoo, BUILD_SOMETHING, \

#     BAR := some parameter value, \

# ))

define NamedParamsMacroTemplate