Blame view

Kbuild 2.41 KB
86feeaa81   Sam Ravnborg   kbuild: full depe...
1
2
3
  #
  # Kbuild for top-level directory of the kernel
  # This file takes care of the following:
1cdf25d70   Christoph Lameter   kbuild: create a ...
4
5
6
  # 1) Generate bounds.h
  # 2) Generate asm-offsets.h (may need bounds.h)
  # 3) Check for missing system calls
86feeaa81   Sam Ravnborg   kbuild: full depe...
7
8
  
  #####
1cdf25d70   Christoph Lameter   kbuild: create a ...
9
  # 1) Generate bounds.h
01fc0ac19   Sam Ravnborg   kbuild: move boun...
10
  bounds-file := include/generated/bounds.h
1cdf25d70   Christoph Lameter   kbuild: create a ...
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
  
  always  := $(bounds-file)
  targets := $(bounds-file) kernel/bounds.s
  
  quiet_cmd_bounds = GEN     $@
  define cmd_bounds
  	(set -e; \
  	 echo "#ifndef __LINUX_BOUNDS_H__"; \
  	 echo "#define __LINUX_BOUNDS_H__"; \
  	 echo "/*"; \
  	 echo " * DO NOT MODIFY."; \
  	 echo " *"; \
  	 echo " * This file was generated by Kbuild"; \
  	 echo " *"; \
  	 echo " */"; \
  	 echo ""; \
  	 sed -ne $(sed-y) $<; \
  	 echo ""; \
  	 echo "#endif" ) > $@
  endef
  
  # We use internal kbuild rules to avoid the "is up to date" message from make
  kernel/bounds.s: kernel/bounds.c FORCE
  	$(Q)mkdir -p $(dir $@)
  	$(call if_changed_dep,cc_s_c)
  
  $(obj)/$(bounds-file): kernel/bounds.s Kbuild
  	$(Q)mkdir -p $(dir $@)
  	$(call cmd,bounds)
  
  #####
  # 2) Generate asm-offsets.h
86feeaa81   Sam Ravnborg   kbuild: full depe...
43
  #
559df2e02   Sam Ravnborg   kbuild: move asm-...
44
  offsets-file := include/generated/asm-offsets.h
86feeaa81   Sam Ravnborg   kbuild: full depe...
45

1cdf25d70   Christoph Lameter   kbuild: create a ...
46
47
  always  += $(offsets-file)
  targets += $(offsets-file)
6752ed90d   Thomas Gleixner   Kbuild: allow arc...
48
  targets += arch/$(SRCARCH)/kernel/asm-offsets.s
1cdf25d70   Christoph Lameter   kbuild: create a ...
49

86feeaa81   Sam Ravnborg   kbuild: full depe...
50

048eb582f   Sam Ravnborg   kbuild: mips use ...
51
52
  # Default sed regexp - multiline due to syntax constraints
  define sed-y
bf2ae2b37   Christoph Lameter   pageflags: standa...
53
  	"/^->/{s:->#\(.*\):/* \1 */:; \
95a2f6f72   David Howells   Partially revert ...
54
  	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
a22dcdb00   Alexander van Heukelum   x86, asm: Fix anc...
55
  	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
bf2ae2b37   Christoph Lameter   pageflags: standa...
56
  	s:->::; p;}"
048eb582f   Sam Ravnborg   kbuild: mips use ...
57
  endef
048eb582f   Sam Ravnborg   kbuild: mips use ...
58

86feeaa81   Sam Ravnborg   kbuild: full depe...
59
60
  quiet_cmd_offsets = GEN     $@
  define cmd_offsets
86feeaa81   Sam Ravnborg   kbuild: full depe...
61
62
63
64
65
66
  	(set -e; \
  	 echo "#ifndef __ASM_OFFSETS_H__"; \
  	 echo "#define __ASM_OFFSETS_H__"; \
  	 echo "/*"; \
  	 echo " * DO NOT MODIFY."; \
  	 echo " *"; \
65ff22ee3   Olaf Hering   remove RPM_BUILD_...
67
  	 echo " * This file was generated by Kbuild"; \
86feeaa81   Sam Ravnborg   kbuild: full depe...
68
69
70
  	 echo " *"; \
  	 echo " */"; \
  	 echo ""; \
ac448afbc   Brian Gerst   kbuild: clean up ...
71
  	 sed -ne $(sed-y) $<; \
86feeaa81   Sam Ravnborg   kbuild: full depe...
72
73
74
75
76
  	 echo ""; \
  	 echo "#endif" ) > $@
  endef
  
  # We use internal kbuild rules to avoid the "is up to date" message from make
1cdf25d70   Christoph Lameter   kbuild: create a ...
77
78
  arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
                                        $(obj)/$(bounds-file) FORCE
86feeaa81   Sam Ravnborg   kbuild: full depe...
79
80
  	$(Q)mkdir -p $(dir $@)
  	$(call if_changed_dep,cc_s_c)
6752ed90d   Thomas Gleixner   Kbuild: allow arc...
81
  $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
86feeaa81   Sam Ravnborg   kbuild: full depe...
82
  	$(call cmd,offsets)
c53aeca05   Sam Ravnborg   kbuild: complain ...
83
  #####
1cdf25d70   Christoph Lameter   kbuild: create a ...
84
  # 3) Check for missing system calls
c53aeca05   Sam Ravnborg   kbuild: complain ...
85
86
87
88
89
90
91
92
  #
  
  quiet_cmd_syscalls = CALL    $<
        cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)
  
  PHONY += missing-syscalls
  missing-syscalls: scripts/checksyscalls.sh FORCE
  	$(call cmd,syscalls)
1cdf25d70   Christoph Lameter   kbuild: create a ...
93

ef8ff89b5   Michal Marek   kbuild: Really do...
94
95
  # Keep these two files during make clean
  no-clean-files := $(bounds-file) $(offsets-file)