[deliverable/linux.git] / Kbuild

#
# Kbuild for top-level directory of the kernel
# This file takes care of the following:
# 1) Generate bounds.h
# 2) Generate asm-offsets.h (may need bounds.h)
# 3) Check for missing system calls

# Default sed regexp - multiline due to syntax constraints
define sed-y
	"/^->/{s:->#\(.*\):/* \1 */:; \
	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
	s:->::; p;}"
endef

quiet_cmd_offsets = GEN     $@
define cmd_offsets
	(set -e; \
	 echo "#ifndef $2"; \
	 echo "#define $2"; \
	 echo "/*"; \
	 echo " * DO NOT MODIFY."; \
	 echo " *"; \
	 echo " * This file was generated by Kbuild"; \
	 echo " */"; \
	 echo ""; \
	 sed -ne $(sed-y) $<; \
	 echo ""; \
	 echo "#endif" ) > $@
endef

#####
# 1) Generate bounds.h

bounds-file := include/generated/bounds.h

always  := $(bounds-file)
targets := $(bounds-file) kernel/bounds.s

# We use internal kbuild rules to avoid the "is up to date" message from make
kernel/bounds.s: kernel/bounds.c FORCE
	$(Q)mkdir -p $(dir $@)
	$(call if_changed_dep,cc_s_c)

$(obj)/$(bounds-file): kernel/bounds.s Kbuild
	$(Q)mkdir -p $(dir $@)
	$(call cmd,offsets,__LINUX_BOUNDS_H__)

#####
# 2) Generate asm-offsets.h
#

offsets-file := include/generated/asm-offsets.h

always  += $(offsets-file)
targets += $(offsets-file)
targets += arch/$(SRCARCH)/kernel/asm-offsets.s

# We use internal kbuild rules to avoid the "is up to date" message from make
arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
                                      $(obj)/$(bounds-file) FORCE
	$(Q)mkdir -p $(dir $@)
	$(call if_changed_dep,cc_s_c)

$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
	$(call cmd,offsets,__ASM_OFFSETS_H__)

#####
# 3) Check for missing system calls
#

always += missing-syscalls
targets += missing-syscalls

quiet_cmd_syscalls = CALL    $<
      cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)

missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
	$(call cmd,syscalls)

# Keep these two files during make clean
no-clean-files := $(bounds-file) $(offsets-file)
Commit	Line	Data
	1	#
	2	# Kbuild for top-level directory of the kernel
	3	# This file takes care of the following:
	4	# 1) Generate bounds.h
	5	# 2) Generate asm-offsets.h (may need bounds.h)
	6	# 3) Check for missing system calls
	7
	8	# Default sed regexp - multiline due to syntax constraints
	9	define sed-y
	10	"/^->/{s:->#\(.\):/ \1 */:; \
	11	s:^->\([^ ]\) [\$$#]\([-0-9]\) \(.\):#define \1 \2 /* \3 */:; \
	12	s:^->\([^ ]\) [\$$#]\([^ ]\) \(.\):#define \1 \2 /* \3 */:; \
	13	s:->::; p;}"
	14	endef
	15
	16	quiet_cmd_offsets = GEN $@
	17	define cmd_offsets
	18	(set -e; \
	19	echo "#ifndef $2"; \
	20	echo "#define $2"; \
	21	echo "/*"; \
	22	echo " * DO NOT MODIFY."; \
	23	echo " *"; \
	24	echo " * This file was generated by Kbuild"; \
	25	echo " */"; \
	26	echo ""; \
	27	sed -ne $(sed-y) $<; \
	28	echo ""; \
	29	echo "#endif" ) > $@
	30	endef
	31
	32	#####
	33	# 1) Generate bounds.h
	34
	35	bounds-file := include/generated/bounds.h
	36
	37	always := $(bounds-file)
	38	targets := $(bounds-file) kernel/bounds.s
	39
	40	# We use internal kbuild rules to avoid the "is up to date" message from make
	41	kernel/bounds.s: kernel/bounds.c FORCE
	42	$(Q)mkdir -p $(dir $@)
	43	$(call if_changed_dep,cc_s_c)
	44
	45	$(obj)/$(bounds-file): kernel/bounds.s Kbuild
	46	$(Q)mkdir -p $(dir $@)
	47	$(call cmd,offsets,__LINUX_BOUNDS_H__)
	48
	49	#####
	50	# 2) Generate asm-offsets.h
	51	#
	52
	53	offsets-file := include/generated/asm-offsets.h
	54
	55	always += $(offsets-file)
	56	targets += $(offsets-file)
	57	targets += arch/$(SRCARCH)/kernel/asm-offsets.s
	58
	59	# We use internal kbuild rules to avoid the "is up to date" message from make
	60	arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
	61	$(obj)/$(bounds-file) FORCE
	62	$(Q)mkdir -p $(dir $@)
	63	$(call if_changed_dep,cc_s_c)
	64
	65	$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
	66	$(call cmd,offsets,__ASM_OFFSETS_H__)
	67
	68	#####
	69	# 3) Check for missing system calls
	70	#
	71
	72	always += missing-syscalls
	73	targets += missing-syscalls
	74
	75	quiet_cmd_syscalls = CALL $<
	76	cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
	77
	78	missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
	79	$(call cmd,syscalls)
	80
	81	# Keep these two files during make clean
	82	no-clean-files := $(bounds-file) $(offsets-file)