Root/Kbuild

Source at commit be977234bfb4a6dca8a39e7c52165e4cd536ad71 created 9 years 3 months ago.
By Lars-Peter Clausen, jz4740: Fix compile error
1#
2# Kbuild for top-level directory of the kernel
3# This file takes care of the following:
4# 1) Generate bounds.h
5# 2) Generate asm-offsets.h (may need bounds.h)
6# 3) Check for missing system calls
7
8#####
9# 1) Generate bounds.h
10
11bounds-file := include/generated/bounds.h
12
13always := $(bounds-file)
14targets := $(bounds-file) kernel/bounds.s
15
16quiet_cmd_bounds = GEN $@
17define cmd_bounds
18    (set -e; \
19     echo "#ifndef __LINUX_BOUNDS_H__"; \
20     echo "#define __LINUX_BOUNDS_H__"; \
21     echo "/*"; \
22     echo " * DO NOT MODIFY."; \
23     echo " *"; \
24     echo " * This file was generated by Kbuild"; \
25     echo " *"; \
26     echo " */"; \
27     echo ""; \
28     sed -ne $(sed-y) $<; \
29     echo ""; \
30     echo "#endif" ) > $@
31endef
32
33# We use internal kbuild rules to avoid the "is up to date" message from make
34kernel/bounds.s: kernel/bounds.c FORCE
35    $(Q)mkdir -p $(dir $@)
36    $(call if_changed_dep,cc_s_c)
37
38$(obj)/$(bounds-file): kernel/bounds.s Kbuild
39    $(Q)mkdir -p $(dir $@)
40    $(call cmd,bounds)
41
42#####
43# 2) Generate asm-offsets.h
44#
45
46offsets-file := include/generated/asm-offsets.h
47
48always += $(offsets-file)
49targets += $(offsets-file)
50targets += arch/$(SRCARCH)/kernel/asm-offsets.s
51
52
53# Default sed regexp - multiline due to syntax constraints
54define sed-y
55    "/^->/{s:->#\(.*\):/* \1 */:; \
56    s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
57    s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
58    s:->::; p;}"
59endef
60
61quiet_cmd_offsets = GEN $@
62define cmd_offsets
63    (set -e; \
64     echo "#ifndef __ASM_OFFSETS_H__"; \
65     echo "#define __ASM_OFFSETS_H__"; \
66     echo "/*"; \
67     echo " * DO NOT MODIFY."; \
68     echo " *"; \
69     echo " * This file was generated by Kbuild"; \
70     echo " *"; \
71     echo " */"; \
72     echo ""; \
73     sed -ne $(sed-y) $<; \
74     echo ""; \
75     echo "#endif" ) > $@
76endef
77
78# We use internal kbuild rules to avoid the "is up to date" message from make
79arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
80                                      $(obj)/$(bounds-file) FORCE
81    $(Q)mkdir -p $(dir $@)
82    $(call if_changed_dep,cc_s_c)
83
84$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
85    $(call cmd,offsets)
86
87#####
88# 3) Check for missing system calls
89#
90
91quiet_cmd_syscalls = CALL $<
92      cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)
93
94PHONY += missing-syscalls
95missing-syscalls: scripts/checksyscalls.sh FORCE
96    $(call cmd,syscalls)
97
98# Keep these two files during make clean
99no-clean-files := $(bounds-file) $(offsets-file)
100

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