# Kconfig helper macros
  
  # Convenient variables
  comma       := ,
  quote       := "
  squote      := '
  empty       :=
  space       := $(empty) $(empty)
  dollar      := $
  right_paren := )
  left_paren  := (
  
  # $(if-success,<command>,<then>,<else>)
  # Return <then> if <command> exits with 0, <else> otherwise.
  if-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)")
  
  # $(success,<command>)
  # Return y if <command> exits with 0, n otherwise
  success = $(if-success,$(1),y,n)
  
  # $(cc-option,<flag>)
  # Return y if the compiler supports <flag>, n otherwise
  cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null)
  
  # $(ld-option,<flag>)
  # Return y if the linker supports <flag>, n otherwise
  ld-option = $(success,$(LD) -v $(1))

  
  # gcc version including patch level
  gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//')