cpufreq: tango: Use generic platdev driver
[linux-2.6-block.git] / Kbuild
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1#
2# Kbuild for top-level directory of the kernel
3# This file takes care of the following:
1cdf25d7 4# 1) Generate bounds.h
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5# 2) Generate timeconst.h
6# 3) Generate asm-offsets.h (may need bounds.h and timeconst.h)
7# 4) Check for missing system calls
86feeaa8 8
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9# Default sed regexp - multiline due to syntax constraints
10define sed-y
11 "/^->/{s:->#\(.*\):/* \1 */:; \
12 s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
13 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
14 s:->::; p;}"
15endef
1cdf25d7 16
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17# Use filechk to avoid rebuilds when a header changes, but the resulting file
18# does not
19define filechk_offsets
1cdf25d7 20 (set -e; \
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21 echo "#ifndef $2"; \
22 echo "#define $2"; \
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23 echo "/*"; \
24 echo " * DO NOT MODIFY."; \
25 echo " *"; \
26 echo " * This file was generated by Kbuild"; \
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27 echo " */"; \
28 echo ""; \
70a4fd6c 29 sed -ne $(sed-y); \
1cdf25d7 30 echo ""; \
70a4fd6c 31 echo "#endif" )
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32endef
33
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34#####
35# 1) Generate bounds.h
36
37bounds-file := include/generated/bounds.h
38
39always := $(bounds-file)
8a58e162 40targets := kernel/bounds.s
39664e2f 41
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42# We use internal kbuild rules to avoid the "is up to date" message from make
43kernel/bounds.s: kernel/bounds.c FORCE
44 $(Q)mkdir -p $(dir $@)
45 $(call if_changed_dep,cc_s_c)
46
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47$(obj)/$(bounds-file): kernel/bounds.s FORCE
48 $(call filechk,offsets,__LINUX_BOUNDS_H__)
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49
50#####
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51# 2) Generate timeconst.h
52
53timeconst-file := include/generated/timeconst.h
54
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55targets += $(timeconst-file)
56
57quiet_cmd_gentimeconst = GEN $@
58define cmd_gentimeconst
59 (echo $(CONFIG_HZ) | bc -q $< ) > $@
60endef
61define filechk_gentimeconst
62 (echo $(CONFIG_HZ) | bc -q $< )
63endef
64
65$(obj)/$(timeconst-file): kernel/time/timeconst.bc FORCE
66 $(call filechk,gentimeconst)
67
68#####
69# 3) Generate asm-offsets.h
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70#
71
559df2e0 72offsets-file := include/generated/asm-offsets.h
86feeaa8 73
1cdf25d7 74always += $(offsets-file)
6752ed90 75targets += arch/$(SRCARCH)/kernel/asm-offsets.s
1cdf25d7 76
86feeaa8 77# We use internal kbuild rules to avoid the "is up to date" message from make
1cdf25d7 78arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
0a227985 79 $(obj)/$(timeconst-file) $(obj)/$(bounds-file) FORCE
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80 $(Q)mkdir -p $(dir $@)
81 $(call if_changed_dep,cc_s_c)
82
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83$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
84 $(call filechk,offsets,__ASM_OFFSETS_H__)
86feeaa8 85
c53aeca0 86#####
0a227985 87# 4) Check for missing system calls
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88#
89
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90always += missing-syscalls
91targets += missing-syscalls
92
c53aeca0 93quiet_cmd_syscalls = CALL $<
44656fa0 94 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
c53aeca0 95
5f7efb4c 96missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
c53aeca0 97 $(call cmd,syscalls)
1cdf25d7 98
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99# Keep these three files during make clean
100no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file)