2 # Kbuild for top-level directory of the kernel
3 # This file takes care of the following:
5 # 2) Generate asm-offsets.h (may need bounds.h)
6 # 3) Check for missing system calls
8 # Default sed regexp - multiline due to syntax constraints
10 "/^->/{s:->#\(.*\):/* \1 */:; \
11 s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
12 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
16 # Use filechk to avoid rebuilds when a header changes, but the resulting file
18 define filechk_offsets
23 echo " * DO NOT MODIFY."; \
25 echo " * This file was generated by Kbuild"; \
34 # 1) Generate bounds.h
36 bounds-file := include/generated/bounds.h
38 always := $(bounds-file)
39 targets := $(bounds-file) kernel/bounds.s
41 # We use internal kbuild rules to avoid the "is up to date" message from make
42 kernel/bounds.s: kernel/bounds.c FORCE
43 $(Q)mkdir -p $(dir $@)
44 $(call if_changed_dep,cc_s_c)
46 $(obj)/$(bounds-file): kernel/bounds.s FORCE
47 $(call filechk,offsets,__LINUX_BOUNDS_H__)
50 # 2) Generate asm-offsets.h
53 offsets-file := include/generated/asm-offsets.h
55 always += $(offsets-file)
56 targets += $(offsets-file)
57 targets += arch/$(SRCARCH)/kernel/asm-offsets.s
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)
65 $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
66 $(call filechk,offsets,__ASM_OFFSETS_H__)
69 # 3) Check for missing system calls
72 always += missing-syscalls
73 targets += missing-syscalls
75 quiet_cmd_syscalls = CALL $<
76 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
78 missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
81 # Keep these two files during make clean
82 no-clean-files := $(bounds-file) $(offsets-file)