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usr
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src
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linux-headers-4.4.0-166
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Kbuild
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# # Kbuild for top-level directory of the kernel # This file takes care of the following: # 1) Generate bounds.h # 2) Generate timeconst.h # 3) Generate asm-offsets.h (may need bounds.h and timeconst.h) # 4) Check for missing system calls ##### # 1) Generate bounds.h bounds-file := include/generated/bounds.h always := $(bounds-file) targets := 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 FORCE $(call filechk,offsets,__LINUX_BOUNDS_H__) ##### # 2) Generate timeconst.h timeconst-file := include/generated/timeconst.h targets += $(timeconst-file) quiet_cmd_gentimeconst = GEN $@ define cmd_gentimeconst (echo $(CONFIG_HZ) | bc -q $< ) > $@ endef define filechk_gentimeconst (echo $(CONFIG_HZ) | bc -q $< ) endef $(obj)/$(timeconst-file): kernel/time/timeconst.bc FORCE $(call filechk,gentimeconst) ##### # 3) Generate asm-offsets.h # offsets-file := include/generated/asm-offsets.h always += $(offsets-file) targets += arch/$(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 \ $(obj)/$(timeconst-file) $(obj)/$(bounds-file) FORCE $(Q)mkdir -p $(dir $@) $(call if_changed_dep,cc_s_c) $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE $(call filechk,offsets,__ASM_OFFSETS_H__) ##### # 4) 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 three files during make clean no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file)