linux/scripts/Kconfig.include
<<
>>
Prefs
   1# Kconfig helper macros
   2
   3# Convenient variables
   4comma       := ,
   5quote       := "
   6squote      := '
   7empty       :=
   8space       := $(empty) $(empty)
   9dollar      := $
  10right_paren := )
  11left_paren  := (
  12
  13# $(if-success,<command>,<then>,<else>)
  14# Return <then> if <command> exits with 0, <else> otherwise.
  15if-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)")
  16
  17# $(success,<command>)
  18# Return y if <command> exits with 0, n otherwise
  19success = $(if-success,$(1),y,n)
  20
  21# $(cc-option,<flag>)
  22# Return y if the compiler supports <flag>, n otherwise
  23cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null)
  24
  25# $(ld-option,<flag>)
  26# Return y if the linker supports <flag>, n otherwise
  27ld-option = $(success,$(LD) -v $(1))
  28
  29# gcc version including patch level
  30gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//')
  31