Merge tag 'nfsd-6.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
[muen/linux.git] / Kbuild
1 # SPDX-License-Identifier: GPL-2.0
2 #
3 # Kbuild for top-level directory of the kernel
4
5 # Prepare global headers and check sanity before descending into sub-directories
6 # ---------------------------------------------------------------------------
7
8 # Generate bounds.h
9
10 bounds-file := include/generated/bounds.h
11
12 targets := kernel/bounds.s
13
14 $(bounds-file): kernel/bounds.s FORCE
15         $(call filechk,offsets,__LINUX_BOUNDS_H__)
16
17 # Generate timeconst.h
18
19 timeconst-file := include/generated/timeconst.h
20
21 filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $<
22
23 $(timeconst-file): kernel/time/timeconst.bc FORCE
24         $(call filechk,gentimeconst)
25
26 # Generate asm-offsets.h
27
28 offsets-file := include/generated/asm-offsets.h
29
30 targets += arch/$(SRCARCH)/kernel/asm-offsets.s
31
32 arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file)
33
34 $(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
35         $(call filechk,offsets,__ASM_OFFSETS_H__)
36
37 # Check for missing system calls
38
39 quiet_cmd_syscalls = CALL    $<
40       cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
41
42 PHONY += missing-syscalls
43 missing-syscalls: scripts/checksyscalls.sh $(offsets-file)
44         $(call cmd,syscalls)
45
46 # Check the manual modification of atomic headers
47
48 quiet_cmd_check_sha1 = CHKSHA1 $<
49       cmd_check_sha1 = \
50         if ! command -v sha1sum >/dev/null; then \
51                 echo "warning: cannot check the header due to sha1sum missing"; \
52                 exit 0; \
53         fi; \
54         if [ "$$(sed -n '$$s:// ::p' $<)" != \
55              "$$(sed '$$d' $< | sha1sum | sed 's/ .*//')" ]; then \
56                 echo "error: $< has been modified." >&2; \
57                 exit 1; \
58         fi; \
59         touch $@
60
61 atomic-checks += $(addprefix $(obj)/.checked-, \
62           atomic-arch-fallback.h \
63           atomic-instrumented.h \
64           atomic-long.h)
65
66 targets += $(atomic-checks)
67 $(atomic-checks): $(obj)/.checked-%: include/linux/atomic/%  FORCE
68         $(call if_changed,check_sha1)
69
70 # A phony target that depends on all the preparation targets
71
72 PHONY += prepare
73 prepare: $(offsets-file) missing-syscalls $(atomic-checks)
74         @:
75
76 # Ordinary directory descending
77 # ---------------------------------------------------------------------------
78
79 obj-y                   += init/
80 obj-y                   += usr/
81 obj-y                   += arch/$(SRCARCH)/
82 obj-y                   += $(ARCH_CORE)
83 obj-y                   += kernel/
84 obj-y                   += certs/
85 obj-y                   += mm/
86 obj-y                   += fs/
87 obj-y                   += ipc/
88 obj-y                   += security/
89 obj-y                   += crypto/
90 obj-$(CONFIG_BLOCK)     += block/
91 obj-$(CONFIG_IO_URING)  += io_uring/
92 obj-$(CONFIG_RUST)      += rust/
93 obj-y                   += $(ARCH_LIB)
94 obj-y                   += drivers/
95 obj-y                   += sound/
96 obj-$(CONFIG_SAMPLES)   += samples/
97 obj-$(CONFIG_NET)       += net/
98 obj-y                   += virt/
99 obj-y                   += $(ARCH_DRIVERS)