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b10fdeea8c
It is unneeded to check the sha1sum every time. Create the timestamp files to manage it. Add '.' to clean-dirs because 'make clean' must visit ./Kbuild to clean up the timestamp files. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
75 lines
1.9 KiB
Makefile
75 lines
1.9 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Kbuild for top-level directory of the kernel
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# Prepare global headers and check sanity before descending into sub-directories
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# ---------------------------------------------------------------------------
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# Generate bounds.h
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bounds-file := include/generated/bounds.h
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targets := kernel/bounds.s
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$(bounds-file): kernel/bounds.s FORCE
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$(call filechk,offsets,__LINUX_BOUNDS_H__)
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# Generate timeconst.h
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timeconst-file := include/generated/timeconst.h
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filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $<
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$(timeconst-file): kernel/time/timeconst.bc FORCE
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$(call filechk,gentimeconst)
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# Generate asm-offsets.h
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offsets-file := include/generated/asm-offsets.h
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targets += arch/$(SRCARCH)/kernel/asm-offsets.s
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arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file)
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$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
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$(call filechk,offsets,__ASM_OFFSETS_H__)
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# Check for missing system calls
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quiet_cmd_syscalls = CALL $<
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cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
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PHONY += missing-syscalls
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missing-syscalls: scripts/checksyscalls.sh $(offsets-file)
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$(call cmd,syscalls)
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# Check the manual modification of atomic headers
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quiet_cmd_check_sha1 = CHKSHA1 $<
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cmd_check_sha1 = \
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if ! command -v sha1sum >/dev/null; then \
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echo "warning: cannot check the header due to sha1sum missing"; \
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exit 0; \
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fi; \
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if [ "$$(sed -n '$$s:// ::p' $<)" != \
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"$$(sed '$$d' $< | sha1sum | sed 's/ .*//')" ]; then \
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echo "error: $< has been modified." >&2; \
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exit 1; \
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fi; \
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touch $@
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atomic-checks += $(addprefix $(obj)/.checked-, \
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atomic-arch-fallback.h \
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atomic-instrumented.h \
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atomic-long.h)
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targets += $(atomic-checks)
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$(atomic-checks): $(obj)/.checked-%: include/linux/atomic/% FORCE
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$(call if_changed,check_sha1)
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# A phony target that depends on all the preparation targets
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PHONY += prepare
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prepare: $(offsets-file) missing-syscalls $(atomic-checks)
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@:
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