ccflags-y := -DSRCTREE='"$(srctree)"' -DOBJTREE='"$(objtree)"'

  # if-lt
  # Usage VAR := $(call if-lt, $(a), $(b))
  # Returns 1 if (a < b)
  if-lt = $(shell [ $(1) -lt $(2) ] && echo 1)
  
  ifeq ($(CONFIG_GCOV_FORMAT_3_4),y)
    cc-ver := 0304
  else ifeq ($(CONFIG_GCOV_FORMAT_4_7),y)
    cc-ver := 0407
  else
  # Use cc-version if available, otherwise set 0
  #
  # scripts/Kbuild.include, which contains cc-version function, is not included
  # during make clean "make -f scripts/Makefile.clean obj=kernel/gcov"
  # Meaning cc-ver is empty causing if-lt test to fail with
  # "/bin/sh: line 0: [: -lt: unary operator expected" error mesage.
  # This has no affect on the clean phase, but the error message could be
  # confusing/annoying. So this dummy workaround sets cc-ver to zero if cc-version
  # is not available. We can probably move if-lt to Kbuild.include, so it's also
  # not defined during clean or to include Kbuild.include in
  # scripts/Makefile.clean. But the following workaround seems least invasive.
    cc-ver := $(if $(call cc-version),$(call cc-version),0)
  endif
  
  obj-$(CONFIG_GCOV_KERNEL) := base.o fs.o
  
  ifeq ($(call if-lt, $(cc-ver), 0407),1)
    obj-$(CONFIG_GCOV_KERNEL) += gcc_3_4.o
  else
    obj-$(CONFIG_GCOV_KERNEL) += gcc_4_7.o
  endif