11fda14804
Adding $(obj)/ to file paths relative from the top objtree looks a bit redundant to me. This commit has no functional change since $(obj) is '.' in this file. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
1.8 KiB
SPDX-License-Identifier: GPL-2.0
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
5) Generate constants.py (may need bounds.h)
1) Generate bounds.h
bounds-file := include/generated/bounds.h
always := $(bounds-file) targets := kernel/bounds.s
$(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
$(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
arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file)
$(offsets-file): arch/$(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 $(call cmd,syscalls)
5) Generate constants for Python GDB integration
extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py
build_constants_py: $(timeconst-file) $(bounds-file) @$(MAKE) $(build)=scripts/gdb/linux $@
Keep these three files during make clean
no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file)