[linux.git] / scripts / Kconfig.include

# 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*//')
Commit	Line	Data
e1cfdc0e MY	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	# $(ld-option,<flag>)
	26	# Return y if the linker supports <flag>, n otherwise
	27	ld-option = $(success,$(LD) -v $(1))
59f53855 MY	28
	29	# gcc version including patch level
	30	gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) \| sed 's/^0*//')