#
  # 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

  
  #####

  # 1) Generate bounds.h

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

  
  always  := $(bounds-file)
  targets := $(bounds-file) kernel/bounds.s
  
  quiet_cmd_bounds = GEN     $@
  define cmd_bounds
  	(set -e; \
  	 echo "#ifndef __LINUX_BOUNDS_H__"; \
  	 echo "#define __LINUX_BOUNDS_H__"; \
  	 echo "/*"; \
  	 echo " * DO NOT MODIFY."; \
  	 echo " *"; \
  	 echo " * This file was generated by Kbuild"; \
  	 echo " *"; \
  	 echo " */"; \
  	 echo ""; \
  	 sed -ne $(sed-y) $<; \
  	 echo ""; \
  	 echo "#endif" ) > $@
  endef
  
  # 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,bounds)
  
  #####
  # 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

  # 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 __ASM_OFFSETS_H__"; \
  	 echo "#define __ASM_OFFSETS_H__"; \
  	 echo "/*"; \
  	 echo " * DO NOT MODIFY."; \
  	 echo " *"; \

  	 echo " * This file was generated by Kbuild"; \

  	 echo " *"; \
  	 echo " */"; \
  	 echo ""; \

  	 sed -ne $(sed-y) $<; \

  	 echo ""; \
  	 echo "#endif" ) > $@
  endef
  
  # 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)

  #####

  # 3) Check for missing system calls

  #
  
  quiet_cmd_syscalls = CALL    $<
        cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)
  
  PHONY += missing-syscalls
  missing-syscalls: scripts/checksyscalls.sh FORCE
  	$(call cmd,syscalls)

  # Keep these two files during make clean
  no-clean-files := $(bounds-file) $(offsets-file)