xref: /openjdk10/make/common/MakeBase.gmk

#
# Copyright (c) 2011, 2016, 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

# In GNU Make 4.0 and higher, there is a file function for writing to files.
ifeq (4.0, $(firstword $(sort 4.0 $(MAKE_VERSION))))
  HAS_FILE_FUNCTION := true
endif

##############################
# 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
	$(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 works just like EscapeDollar above, but for #.
EscapeHash = $(subst \#,\\\#,$(subst \\\#,\#,$(strip $1)))

################################################################################
# This macro translates $ into $$ to protect the string from make itself.
DoubleDollar = $(subst $$,$$$$,$(strip $1))

################################################################################
# ListPathsSafely can be used to print command parameters to a file. This is
# typically done if the command line lenght risk being too long for the
# OS/shell. In later make versions, the file function can be used for this
# purpose. For earlier versions, a more complex implementation is provided.
#
# The function ListPathsSafely can be called either directly or, more commonly
# from a recipe line. If called from a recipe, it will be executed in the
# evaluation phase of that recipe, which means that it will write to the file
# before any other line in the recipe has been run.
ifeq ($(HAS_FILE_FUNCTION), true)
  # Param 1 - Name of variable containing paths/arguments to output
  # Param 2 - File to print to
  # Param 3 - Set to true to append to file instead of overwriting
  define ListPathsSafely
    $$(call MakeDir, $$(dir $$(strip $2)))
    $$(file $$(if $$(filter true, $$(strip $3)),>>,>) \
        $$(strip $2),$$(subst $$(SPACE),$$(NEWLINE),$$(strip $$($$(strip $1)))))
  endef

else # HAS_FILE_FUNCTION = false

  $(eval compress_paths = \
      $(strip $(shell $(CAT) $(SRC_ROOT)/make/common/support/ListPathsSafely-pre-compress.incl)))
  compress_paths += \
      $(subst $(SRC_ROOT),X97, \
      $(subst $(OUTPUT_ROOT),X98, \
      $(subst X,X00, \
      $(subst $(SPACE),\n,$(strip $1)))))
  $(eval compress_paths += \
      $(strip $(shell $(CAT) $(SRC_ROOT)/make/common/support/ListPathsSafely-post-compress.incl)))

  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'

  ListPathsSafely_IfPrintf = \
      $(if $(word $3,$($(strip $1))), \
          $(shell $(PRINTF) -- "$(strip $(call EscapeDollar, \
              $(call compress_paths, $(wordlist $3,$4,$($(strip $1))))))\n" \
              | $(decompress_paths) >> $2))

  # Param 1 - Name of variable containing paths/arguments to output
  # Param 2 - File to print to
  # Param 3 - Set to true to append to file instead of overwriting
  define ListPathsSafely
    ifneq (,$$(word 30001,$$($$(strip $1))))
      $$(error Cannot list safely more than 30000 paths. $1 has $$(words $$($$(strip $1))) paths!)
    endif
    $$(call MakeDir, $$(dir $2))
    ifneq ($$(strip $3), true)
      $$(shell $(RM) $$(strip $2))
    endif

    $$(call ListPathsSafely_IfPrintf,$1,$2,1,250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,251,500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,501,750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,751,1000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,1001,1250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,1251,1500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,1501,1750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,1751,2000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,2001,2250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,2251,2500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,2501,2750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,2751,3000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,3001,3250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,3251,3500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,3501,3750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,3751,4000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,4001,4250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,4251,4500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,4501,4750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,4751,5000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,5001,5250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,5251,5500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,5501,5750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,5751,6000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,6001,6250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,6251,6500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,6501,6750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,6751,7000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,7001,7250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,7251,7500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,7501,7750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,7751,8000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,8001,8250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,8251,8500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,8501,8750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,8751,9000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,9001,9250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,9251,9500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,9501,9750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,9751,10000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,10001,10250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,10251,10500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,10501,10750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,10751,11000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,11001,11250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,11251,11500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,11501,11750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,11751,12000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,12001,12250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,12251,12500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,12501,12750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,12751,13000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,13001,13250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,13251,13500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,13501,13750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,13751,14000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,14001,14250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,14251,14500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,14501,14750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,14751,15000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,15001,15250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,15251,15500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,15501,15750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,15751,16000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,16001,16250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,16251,16500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,16501,16750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,16751,17000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,17001,17250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,17251,17500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,17501,17750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,17751,18000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,18001,18250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,18251,18500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,18501,18750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,18751,19000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,19001,19250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,19251,19500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,19501,19750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,19751,20000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,20001,20250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,20251,20500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,20501,20750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,20751,21000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,21001,21250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,21251,21500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,21501,21750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,21751,22000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,22001,22250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,22251,22500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,22501,22750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,22751,23000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,23001,23250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,23251,23500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,23501,23750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,23751,24000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,24001,24250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,24251,24500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,24501,24750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,24751,25000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,25001,25250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,25251,25500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,25501,25750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,25751,26000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,26001,26250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,26251,26500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,26501,26750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,26751,27000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,27001,27250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,27251,27500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,27501,27750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,27751,28000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,28001,28250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,28251,28500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,28501,28750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,28751,29000)

    $$(call ListPathsSafely_IfPrintf,$1,$2,29001,29250)
    $$(call ListPathsSafely_IfPrintf,$1,$2,29251,29500)
    $$(call ListPathsSafely_IfPrintf,$1,$2,29501,29750)
    $$(call ListPathsSafely_IfPrintf,$1,$2,29751,30000)
  endef
endif # HAS_FILE_FUNCTION

################################################################################
# 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 .hg directory. The hgtip files are created in
# CreateHgtipFiles.gmk.
HGTIP_FILENAME := .hgtip
FindAllReposAbs = \
    $(strip $(sort $(dir $(filter-out $(SRC_ROOT)/build/%, $(wildcard \
        $(addprefix $(SRC_ROOT)/, \
            .hg */.hg */*/.hg */*/.hg */*/*/.hg \
            .hgtip */.hgtip */*/.hgtip */*/.hgtip */*/*/.hgtip \
        ) \
    )))))

FindAllReposRel = \
    $(strip $(subst $(SRC_ROOT)/,.,$(patsubst $(SRC_ROOT)/%/, %, $(FindAllReposAbs))))

# Emit the repo:tip pairs to $@, but only if they changed since last time
define GetSourceTips
	$(CD) $(SRC_ROOT) ; \
	for i in $(FindAllReposRel) IGNORE ; do \
	  if [ "$${i}" = "IGNORE" ] ; then \
	    continue; \
	  elif [ -d $${i}/.hg -a "$(HG)" != "" ] ; 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 > $@.tmp
	$(PRINTF) "\n" >> $@.tmp
	if [ ! -f $@ ] || [ "`$(CAT) $@`" != "`$(CAT) $@.tmp`" ]; then \
	  $(MV) $@.tmp $@ ; \
	else \
	  $(RM) $@.tmp ; \
	fi
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
  # The warn level can never be turned off
  LogWarn = $$(info $$(strip $$1))
  LOG_WARN :=
  ifneq ($$(findstring $$(LOG_LEVEL), info debug trace),)
    LogInfo = $$(info $$(strip $$1))
    LOG_INFO :=
  else
    LogInfo =
    LOG_INFO := > /dev/null
  endif
  ifneq ($$(findstring $$(LOG_LEVEL), debug trace),)
    LogDebug = $$(info $$(strip $$1))
    LOG_DEBUG :=
  else
    LogDebug =
    LOG_DEBUG := > /dev/null
  endif
  ifneq ($$(findstring $$(LOG_LEVEL), trace),)
    LogTrace = $$(info $$(strip $$1))
    LOG_TRACE :=
  else
    LogTrace =
    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 := 35
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
  $(if $($(MAX_PARAMS)),$(error Internal makefile error: \
      Too many named arguments to macro, please update MAX_PARAMS in MakeBase.gmk))
  # Iterate over 2 3 4... and evaluate the named parameters with $1_ as prefix
  $(foreach i,$(PARAM_SEQUENCE), $(if $(strip $($i)),\
    $(strip $1)_$(strip $(call DoubleDollar, $($i))))$(NEWLINE))
  # Debug print all named parameter names and values
  $(if $(findstring $(LOG_LEVEL),debug trace), \
    $(info $0 $(strip $1) $(foreach i,$(PARAM_SEQUENCE), \
      $(if $(strip $($i)),$(NEWLINE) $(strip [$i] $(if $(filter $(LOG_LEVEL), trace), \
        $($i), $(wordlist 1, 20, $($(i))) $(if $(word 21, $($(i))), ...)))))))

  $(if $(DEBUG_$(strip $1)),
    $(info -------- <<< Begin expansion of $(strip $1)) \
    $(info $(call $(0)Body,$(strip $1))) \
    $(info -------- >>> End expansion of $(strip $1)) \
  )

  $(call $(0)Body,$(strip $1))
endef

################################################################################
# Make directory without forking mkdir if not needed
# 1: List of directories to create
MakeDir = \
    $(strip \
        $(eval MakeDir_dirs_to_make := $(strip $(foreach d, $1, $(if $(wildcard $d), , $d)))) \
        $(if $(MakeDir_dirs_to_make), $(shell $(MKDIR) -p $(MakeDir_dirs_to_make))) \
    )

################################################################################
# Assign a variable only if it is empty
# Param 1 - Variable to assign
# Param 2 - Value to assign
SetIfEmpty = \
    $(if $($(strip $1)),,$(eval $(strip $1) := $2))

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

ifeq ($(OPENJDK_TARGET_OS),solaris)
  # On Solaris, if the target is a symlink and exists, cp won't overwrite.
  # Cp has to operate in recursive mode to allow for -P flag, to preserve soft links. If the
  # name of the target file differs from the source file, rename after copy.
  # If the source and target parent directories are the same, recursive copy doesn't work
  # so we fall back on regular copy, which isn't preserving symlinks.
  define install-file
	$(MKDIR) -p '$(@D)'
	$(RM) '$@'
	if [ "$(@D)" != "$(<D)" ]; then \
	  $(CP) -f -r -P '$<' '$(@D)'; \
	  if [ "$(@F)" != "$(<F)" ]; then \
	    $(MV) '$(@D)/$(<F)' '$@'; \
	  fi; \
	else \
	  if [ -L '$<' ]; then \
	    $(ECHO) "Source file is a symlink and target is in the same directory: $< $@" ; \
	    exit 1; \
	  fi; \
	  $(CP) -f '$<' '$@'; \
	fi
  endef
else ifeq ($(OPENJDK_TARGET_OS),macosx)
  # On mac, extended attributes sometimes creep into the source files, which may later
  # cause the creation of ._* files which confuses testing. Clear these with xattr if
  # set. Some files get their write permissions removed after being copied to the
  # output dir. When these are copied again to images, xattr would fail. By only clearing
  # attributes when they are present, failing on this is avoided.
  #
  # If copying a soft link to a directory, need to delete the target first to avoid
  # weird errors.
  define install-file
	$(MKDIR) -p '$(@D)'
	$(RM) '$@'
	$(CP) -fRP '$<' '$@'
	if [ -n "`$(XATTR) -l '$@'`" ]; then $(XATTR) -c '$@'; fi
  endef
else
  # Running mkdir and cp in the same shell speeds up copy intensive tasks in Cygwin
  # significantly.
  define install-file
	$(call MakeDir, $(@D))
	$(CP) -fP '$<' '$@'
  endef
endif

################################################################################
# Take two paths and return the path of the last common directory.
# Ex: /foo/bar/baz, /foo/bar/banan -> /foo/bar
#     foo/bar/baz, /foo/bar -> <empty>
#
# The x prefix is used to preserve the presence of the initial slash
#
# $1 - Path to compare
# $2 - Other path to compare
FindCommonPathPrefix = \
    $(patsubst x%,%,$(subst $(SPACE),/,$(strip \
        $(call FindCommonPathPrefixHelper, \
            $(subst /,$(SPACE),x$(strip $1)), $(subst /,$(SPACE),x$(strip $2))) \
    )))

FindCommonPathPrefixHelper = \
    $(if $(call equals, $(firstword $1), $(firstword $2)), \
      $(firstword $1) \
      $(call FindCommonPathPrefixHelper, \
          $(wordlist 2, $(words $1), $1), $(wordlist 2, $(words $2), $2) \
      ) \
    )

# Convert a partial path into as many directory levels of ../, removing
# leading and following /.
# Ex: foo/bar/baz/ -> ../../..
#     foo/bar -> ../..
#     /foo -> ..
DirToDotDot = \
    $(subst $(SPACE),/,$(foreach d, $(subst /,$(SPACE),$1),..))

# Computes the relative path from a directory to a file
# $1 - File to compute the relative path to
# $2 - Directory to compute the relative path from
RelativePath = \
    $(eval $1_prefix := $(call FindCommonPathPrefix, $1, $2)) \
    $(eval $1_dotdots := $(call DirToDotDot, $(patsubst $($(strip $1)_prefix)/%, %, $2))) \
    $(eval $1_suffix := $(patsubst $($(strip $1)_prefix)/%, %, $1)) \
    $($(strip $1)_dotdots)/$($(strip $1)_suffix)

################################################################################
# link-file-* works similarly to install-file but creates a symlink instead.
# There are two versions, either creating a relative or an absolute link. Be
# careful when using this on Windows since the symlink created is only valid in
# the unix emulation environment.
define link-file-relative
	$(call MakeDir, $(@D))
	$(RM) $@
	$(LN) -s $(call RelativePath, $<, $(@D)) $@
endef

define link-file-absolute
	$(call MakeDir, $(@D))
	$(RM) $@
	$(LN) -s $< $@
endef

################################################################################
# Filter out duplicate sub strings while preserving order. Keeps the first occurance.
uniq = \
    $(if $1,$(firstword $1) $(call uniq,$(filter-out $(firstword $1),$1)))

# Returns all whitespace-separated words in $2 where at least one of the
# whitespace-separated words in $1 is a substring.
containing = \
    $(strip \
        $(foreach v,$(strip $2),\
          $(call uniq,$(foreach p,$(strip $1),$(if $(findstring $p,$v),$v)))))

# Returns all whitespace-separated words in $2 where none of the
# whitespace-separated words in $1 is a substring.
not-containing = \
    $(strip $(filter-out $(call containing,$1,$2),$2))

# Return a list of all string elements that are duplicated in $1.
dups = \
    $(strip $(foreach v, $(sort $1), $(if $(filter-out 1, \
        $(words $(filter $v, $1))), $v)))

# String equals
equals = \
    $(and $(findstring $(strip $1),$(strip $2)),\
        $(findstring $(strip $2),$(strip $1)))

# Remove a whole list of prefixes
# $1 - List of prefixes
# $2 - List of elements to process
remove-prefixes = \
    $(strip $(if $1,$(patsubst $(firstword $1)%,%,\
      $(call remove-prefixes,$(filter-out $(firstword $1),$1),$2)),$2))

# Convert the string given to upper case, without any $(shell)
# Inspired by http://lists.gnu.org/archive/html/help-make/2013-09/msg00009.html
uppercase_table := a,A b,B c,C d,D e,E f,F g,G h,H i,I j,J k,K l,L m,M n,N o,O \
    p,P q,Q r,R s,S t,T u,U v,V w,W x,X y,Y z,Z

uppercase_internal = \
  $(if $(strip $1), $$(subst $(firstword $1), $(call uppercase_internal, \
      $(wordlist 2, $(words $1), $1), $2)), $2)

# Convert a string to upper case. Works only on a-z.
# $1 - The string to convert
uppercase = \
  $(strip \
    $(eval uppercase_result := $(call uppercase_internal, $(uppercase_table), $1)) \
    $(uppercase_result) \
  )

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

ifneq ($(DISABLE_CACHE_FIND), true)
  # In Cygwin, finds are very costly, both because of expensive forks and because
  # of bad file system caching. Find is used extensively in $(shell) commands to
  # find source files. This makes rerunning make with no or few changes rather
  # expensive. To speed this up, these two macros are used to cache the results
  # of simple find commands for reuse.
  #
  # Runs a find and stores both the directories where it was run and the results.
  # This macro can be called multiple times to add to the cache. Only finds files
  # with no filters.
  #
  # Needs to be called with $(eval )
  #
  # Even if the performance benifit is negligible on other platforms, keep the
  # functionality active unless explicitly disabled to exercise it more.
  #
  # Initialize FIND_CACHE_DIRS with := to make it a non recursively-expanded variable
  FIND_CACHE_DIRS :=
  # Param 1 - Dirs to find in
  # Param 2 - (optional) specialization. Normally "-a \( ... \)" expression.
  define FillCacheFind
    # Filter out already cached dirs. The - is needed when FIND_CACHE_DIRS is empty
    # since filter out will then return empty.
    FIND_CACHE_NEW_DIRS := $$(filter-out $$(addsuffix /%,\
        - $(FIND_CACHE_DIRS)) $(FIND_CACHE_DIRS), $1)
    ifneq ($$(FIND_CACHE_NEW_DIRS), )
      # Remove any trailing slash from dirs in the cache dir list
      FIND_CACHE_DIRS += $$(patsubst %/,%, $$(FIND_CACHE_NEW_DIRS))
      FIND_CACHE := $$(sort $$(FIND_CACHE) $$(shell $(FIND) $$(FIND_CACHE_NEW_DIRS) \( -type f -o -type l \) $2))
    endif
  endef

  # Mimics find by looking in the cache if all of the directories have been cached.
  # Otherwise reverts to shell find. This is safe to call on all platforms, even if
  # cache is deactivated.
  #
  # $1 can be either a directory or a file. If it's a directory, make
  # sure we have exactly one trailing slash before the wildcard.
  # The extra - is needed when FIND_CACHE_DIRS is empty but should be harmless.
  #
  # Param 1 - Dirs to find in
  # Param 2 - (optional) specialization. Normally "-a \( ... \)" expression.
  define CacheFind
      $(if $(filter-out $(addsuffix /%,- $(FIND_CACHE_DIRS)) $(FIND_CACHE_DIRS),$1), \
    $(shell $(FIND) $1 \( -type f -o -type l \) $2), \
        $(filter $(addsuffix /%,$(patsubst %/,%,$1)) $1,$(FIND_CACHE)))
  endef

else
  # If CacheFind is disabled, just run the find command.
  # Param 1 - Dirs to find in
  # Param 2 - (optional) specialization. Normally "-a \( ... \)" expression.
  define CacheFind
    $(shell $(FIND) $1 \( -type f -o -type l \) $2)
  endef
endif

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

define AddFileToCopy
  # Helper macro for SetupCopyFiles
  # 1 : Source file
  # 2 : Dest file
  # 3 : Variable to add targets to
  # 4 : Macro to call for copy operation
  $2: $1
	$$(call LogInfo, Copying $$(patsubst $(OUTPUT_ROOT)/%,%,$$@))
	$$($$(strip $4))

  $3 += $2
endef

# Returns the value of the first argument
identity = \
    $(strip $1)

# Setup make rules for copying files, with an option to do more complex
# processing instead of copying.
#
# Parameter 1 is the name of the rule. This name is used as variable prefix,
# and the targets generated are listed in a variable by that name.
#
# Remaining parameters are named arguments. These include:
#   SRC     : Source root dir (defaults to dir of first file)
#   DEST    : Dest root dir
#   FILES   : List of files to copy with absolute paths, or path relative to SRC.
#             Must be in SRC.
#   FLATTEN : Set to flatten the directory structure in the DEST dir.
#   MACRO   : Optionally override the default macro used for making the copy.
#             Default is 'install-file'
#   NAME_MACRO : Optionally supply a macro that rewrites the target file name
#                based on the source file name
SetupCopyFiles = $(NamedParamsMacroTemplate)
define SetupCopyFilesBody

  ifeq ($$($1_MACRO), )
    $1_MACRO := install-file
  endif

  # Default SRC to the dir of the first file.
  ifeq ($$($1_SRC), )
    $1_SRC := $$(dir $$(firstword $$($1_FILES)))
  endif

  ifeq ($$($1_NAME_MACRO), )
    $1_NAME_MACRO := identity
  endif

  # Remove any trailing slash from SRC and DEST
  $1_SRC := $$(patsubst %/,%,$$($1_SRC))
  $1_DEST := $$(patsubst %/,%,$$($1_DEST))

  $$(foreach f, $$(patsubst $$($1_SRC)/%,%,$$($1_FILES)), \
      $$(eval $$(call AddFileToCopy, $$($1_SRC)/$$f, \
      $$($1_DEST)/$$(call $$(strip $$($1_NAME_MACRO)),$$(if $$($1_FLATTEN),$$(notdir $$f),$$f)), \
      $1, $$($1_MACRO))))

endef

################################################################################
# ShellQuote
#
# Quotes a string with single quotes and replaces single quotes with '\'' so
# that the contents survives being given to the shell.

ShellQuote = \
    $(SQUOTE)$(subst $(SQUOTE),$(SQUOTE)\$(SQUOTE)$(SQUOTE),$(strip $1))$(SQUOTE)

################################################################################
# Write to and read from file

# Param 1 - File to read
ReadFile = \
    $(shell $(CAT) $1)

# Param 1 - Text to write
# Param 2 - File to write to
ifeq ($(HAS_FILE_FUNCTION), true)
  WriteFile = \
      $(file >$2,$(strip $1))
else
  # Use printf to get consistent behavior on all platforms.
  WriteFile = \
      $(shell $(PRINTF) "%s" $(call ShellQuote, $1) > $2)
endif

################################################################################
# DependOnVariable
#
# This macro takes a variable name and puts the value in a file only if the
# value has changed since last. The name of the file is returned. This can be
# used to create rule dependencies on make variable values. The following
# example would get rebuilt if the value of SOME_VAR was changed:
#
# path/to/some-file: $(call DependOnVariable, SOME_VAR)
#         echo $(SOME_VAR) > $@
#
# Note that leading and trailing white space in the value is ignored.
#

# Defines the sub directory structure to store variable value file in
DependOnVariableDirName = \
    $(strip $(addsuffix $(if $(MODULE),/$(MODULE)), \
        $(subst $(SRC_ROOT)/,, $(if $(filter /%, $(firstword $(MAKEFILE_LIST))), \
          $(firstword $(MAKEFILE_LIST)), \
          $(CURDIR)/$(firstword $(MAKEFILE_LIST))))))

# Defines the name of the file to store variable value in. Generates a name
# unless parameter 2 is given.
# Param 1 - Name of variable
# Param 2 - (optional) name of file to store value in
DependOnVariableFileName = \
    $(strip $(if $(strip $2), $2, \
      $(MAKESUPPORT_OUTPUTDIR)/vardeps/$(DependOnVariableDirName)/$(strip $1).vardeps))

# Does the actual work with parameters stripped.
# If the file exists AND the contents is the same as the variable, do nothing
# else print a new file.
# Always returns the name of the file where the value was printed.
# Param 1 - Name of variable
# Param 2 - (optional) name of file to store value in
DependOnVariableHelper = \
    $(strip \
        $(eval -include $(call DependOnVariableFileName, $1, $2)) \
        $(if $(call equals, $(strip $($1)), $(strip $($1_old))),,\
          $(call MakeDir, $(dir $(call DependOnVariableFileName, $1, $2))) \
          $(if $(findstring $(LOG_LEVEL), trace), \
              $(info NewVariable $1: >$(strip $($1))<) \
              $(info OldVariable $1: >$(strip $($1_old))<)) \
          $(call WriteFile, $1_old:=$(call DoubleDollar,$(call EscapeHash,$($1))), \
              $(call DependOnVariableFileName, $1, $2))) \
        $(call DependOnVariableFileName, $1, $2) \
    )

# Main macro
# Param 1 - Name of variable
# Param 2 - (optional) name of file to store value in
DependOnVariable = \
    $(call DependOnVariableHelper,$(strip $1),$(strip $2))

# LogCmdlines is only intended to be used by ExecuteWithLog
ifeq ($(LOG_CMDLINES), true)
  LogCmdlines = $(info $(strip $1))
else
  LogCmdlines =
endif

################################################################################
# ExecuteWithLog will run a command and log the output appropriately. This is
# meant to be used by commands that do "real" work, like a compilation.
# The output is stored in a specified log file, which is displayed at the end
# of the build in case of failure. The  command line itself is stored in a file,
# and also logged to stdout if the LOG=cmdlines option has been given.
#
# NOTE: If the command redirects stdout, the caller needs to wrap it in a
# subshell (by adding parentheses around it), otherwise the redirect to the
# subshell tee process will create a race condition where the target file may
# not be fully written when the make recipe is done.
#
# Param 1 - The path to base the name of the log file / command line file on
# Param 2 - The command to run
ExecuteWithLog = \
  $(call LogCmdlines, Exececuting: [$(strip $2)]) \
  $(call WriteFile, $2, $(strip $1).cmdline) \
  ( $(strip $2) > >($(TEE) $(strip $1).log) 2> >($(TEE) $(strip $1).log >&2) || \
      ( exitcode=$(DOLLAR)? && \
      $(CP) $(strip $1).log $(MAKESUPPORT_OUTPUTDIR)/failure-logs/$(subst /,_,$(patsubst $(BUILD_OUTPUT)/%,%,$(strip $1))).log && \
      exit $(DOLLAR)exitcode ) )

################################################################################
# Find lib dir for module
# Param 1 - module name
ifeq ($(OPENJDK_TARGET_OS_TYPE), unix)
  FindLibDirForModule = \
      $(SUPPORT_OUTPUTDIR)/modules_libs/$(strip $1)$(OPENJDK_TARGET_CPU_LIBDIR)
else
  FindLibDirForModule = \
      $(SUPPORT_OUTPUTDIR)/modules_libs/$(strip $1)
endif

################################################################################
# Return a string suitable for use after a -classpath or --module-path option. It
# will be correct and safe to use on all platforms. Arguments are given as space
# separate classpath entries. Safe for multiple nested calls.
# param 1 : A space separated list of classpath entries
# The surrounding strip is needed to keep additional whitespace out
PathList = \
  "$(subst $(SPACE),$(PATH_SEP),$(strip $(subst $(DQUOTE),,$1)))"

################################################################################
# Check if a specified hotspot variant is being built, or at least one of a
# list of variants. Will return 'true' or 'false'.
# $1 - the variant to test for
check-jvm-variant = \
  $(strip \
    $(if $(filter-out $(VALID_JVM_VARIANTS), $1), \
      $(error Internal error: Invalid variant tested: $1)) \
    $(if $(filter $1, $(JVM_VARIANTS)), true, false))

################################################################################
# Converts a space separated list to a comma separated list.
#
# Replacing double-comma with a single comma is to workaround the issue with
# some version of make on windows that doesn't substitute spaces with one comma
# properly.
CommaList = \
  $(strip \
      $(subst $(COMMA)$(COMMA),$(COMMA),$(subst $(SPACE),$(COMMA),$(strip $1))) \
  )

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

# Hook to include the corresponding custom file, if present.
$(eval $(call IncludeCustomExtension, , common/MakeBase.gmk))

endif # _MAKEBASE_GMK