ifndef HAS_UTIL_MK
HAS_UTIL_MK := T

MK_DIR := $(patsubst %/,%,$(dir $(lastword $(MAKEFILE_LIST))))

ifneq (,$(or $(ComSpec),$(COMSPEC),$(comspec)))
  ifneq (Cygwin,$(shell uname -a))
    NULL := /dev/null
    fixpath = $(1)
    emacspath = $(foreach f,$(1),$(shell cygpath -ma $(f)))
  else ifneq (,$(MSYSTEM))
    fixpath = $(foreach f,$(1),$(if $(subst $(f),,$(subst :,,$(f))),\
                $(subst //,/,/$(firstword $(subst :, ,$(f)))$(subst \,/,$(lastword $(subst :, ,$(f))))),$(f)))
    ifneq (,$(filter MSYS% MINGW%,$(MSYSTEM)))
      #$(info test: $(filter MSYS% MINGW%,$(MSYSTEM)))
      emacspath = $(foreach f,$(1),$(subst /,\\\\,$(shell cd $(f)&&pwd -W)))
    else
      RM     := del
      DIRSEP := $(if T,\)
      SHQ    := ^
      RD     := rmdir /q /s
    endif
  endif
endif

# define the $(\n) macro which has the value '\n'
# Note: This really requires two empty lines!
ifndef \n
define \n


endef
endif

# define the $, or $(,) macro which has the value ','
ifndef ,
  , := ,
endif
ifndef comma
  comma := ,
endif

# define the $(sp) macro which has the value ' '
ifndef blank
  blank :=
endif
ifndef sp
  sp := $(blank) $(blank)
endif

# define the $= or $(=) macro which has the value '='
ifndef equals
  equals := =
endif
ifndef $(equals)
  $(equals) := =
endif

# define the $# or $(#) macro which has the value '#'
ifndef \#
  hash := \#
endif
ifndef $(hash)
  $(hash) := \#
endif

# define the $: or $(:) macro which has the value ':'
ifndef colon
  colon := :
endif
ifndef $(colon)
  $(colon) := :
endif

# define the $($$) macro which has the value '$'
ifndef dollar
  dollar := $$
endif
ifndef $(dollar)
  $(dollar) := $$
endif

#define macros for '(' and ')'
ifndef oparen
  oparen := (
endif
ifndef cparen
  cparen := )
endif

dummy :=
sp := $(dummy) $(dummy)
PARENO := (
PARENC := )

DIRSEP    ?= /
SHQ       ?= $(if T,\)
emacspath ?= $(1)
fixpath   ?= $(1)

TEST := test
RD   ?= rm -rf

NULL ?= $(or $(wildcard /dev/null),nul)

ifeq (T,$(V))
  mk-debug      = $(info $1)
  mk-debug-lno  = $(warning $(\n)$1)
  mk-debug-vars = $(foreach _mkv,$1,$(info $(_mkv) := '$($(_mkv))'))
endif

define include-once-helper
  ifndef $(subst ?,_,$(subst /,_,$2))-included
    ifneq (,$(wildcard $2))
      $(subst ?,_,$(subst /,_,$2))-included := T
      $$(call mk-debug-lno,+ including '$1')
      include $2
    else
      $$(call mk-debug-lno,[WARN] could not find '$1')
    endif
  endif
endef

include-once = $(eval $(call include-once-helper,$1,$(subst $(sp),?,$1)))

# END: HAS_UTIL_MK
endif


# Local Variables:
# tab-width: 2
# End: