scripts/Kconfig.include

   1 # Kconfig helper macros
   2
   3 # Convenient variables
   4 comma       := ,
   5 quote       := "
   6 squote      := '
   7 empty       :=
   8 space       := $(empty) $(empty)
   9 dollar      := $
  10 right_paren := )
  11 left_paren  := (
  12
  13 # $(if-success,<command>,<then>,<else>)
  14 # Return <then> if <command> exits with 0, <else> otherwise.
  15 if-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
  19 success = $(if-success,$(1),y,n)
  20
  21 # $(cc-option,<flag>)
  22 # Return y if the compiler supports <flag>, n otherwise
  23 cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null)
  24
  25 # $(cc-define,<macro>)
  26 # Return y if the compiler defines <macro>, n otherwise
  27 cc-define = $(success,$(CC) -dM -E -x c /dev/null | grep -q '^#define \<$(1)\>')
  28
  29 # $(ld-option,<flag>)
  30 # Return y if the linker supports <flag>, n otherwise
  31 ld-option = $(success,$(LD) -v $(1))
  32
  33 # gcc version including patch level
  34 gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//')