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1 | # Backward compatibility |
2 | asflags-y += $(EXTRA_AFLAGS) |
3 | ccflags-y += $(EXTRA_CFLAGS) |
4 | cppflags-y += $(EXTRA_CPPFLAGS) |
5 | ldflags-y += $(EXTRA_LDFLAGS) |
6 | |
7 | # |
8 | # flags that take effect in sub directories |
9 | export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y) |
10 | export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(subdir-ccflags-y) |
11 | |
12 | # Figure out what we need to build from the various variables |
13 | # =========================================================================== |
14 | |
15 | # When an object is listed to be built compiled-in and modular, |
16 | # only build the compiled-in version |
17 | |
18 | obj-m := $(filter-out $(obj-y),$(obj-m)) |
19 | |
20 | # Libraries are always collected in one lib file. |
21 | # Filter out objects already built-in |
22 | |
23 | lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m))) |
24 | |
25 | |
26 | # Handle objects in subdirs |
27 | # --------------------------------------------------------------------------- |
28 | # o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o |
29 | # and add the directory to the list of dirs to descend into: $(subdir-y) |
30 | # o if we encounter foo/ in $(obj-m), remove it from $(obj-m) |
31 | # and add the directory to the list of dirs to descend into: $(subdir-m) |
32 | |
33 | # Determine modorder. |
34 | # Unfortunately, we don't have information about ordering between -y |
35 | # and -m subdirs. Just put -y's first. |
36 | modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko)) |
37 | |
38 | __subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y))) |
39 | subdir-y += $(__subdir-y) |
40 | __subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m))) |
41 | subdir-m += $(__subdir-m) |
42 | obj-y := $(patsubst %/, %/built-in.o, $(obj-y)) |
43 | obj-m := $(filter-out %/, $(obj-m)) |
44 | |
45 | # Subdirectories we need to descend into |
46 | |
47 | subdir-ym := $(sort $(subdir-y) $(subdir-m)) |
48 | |
49 | # if $(foo-objs) exists, foo.o is a composite object |
50 | multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) |
51 | multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) |
52 | multi-used := $(multi-used-y) $(multi-used-m) |
53 | single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m))) |
54 | |
55 | # Build list of the parts of our composite objects, our composite |
56 | # objects depend on those (obviously) |
57 | multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y))) |
58 | multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y))) |
59 | multi-objs := $(multi-objs-y) $(multi-objs-m) |
60 | |
61 | # $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to |
62 | # tell kbuild to descend |
63 | subdir-obj-y := $(filter %/built-in.o, $(obj-y)) |
64 | |
65 | # $(obj-dirs) is a list of directories that contain object files |
66 | obj-dirs := $(dir $(multi-objs) $(subdir-obj-y)) |
67 | |
68 | # Replace multi-part objects by their individual parts, look at local dir only |
69 | real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y) |
70 | real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) |
71 | |
72 | # Add subdir path |
73 | |
74 | extra-y := $(addprefix $(obj)/,$(extra-y)) |
75 | always := $(addprefix $(obj)/,$(always)) |
76 | targets := $(addprefix $(obj)/,$(targets)) |
77 | modorder := $(addprefix $(obj)/,$(modorder)) |
78 | obj-y := $(addprefix $(obj)/,$(obj-y)) |
79 | obj-m := $(addprefix $(obj)/,$(obj-m)) |
80 | lib-y := $(addprefix $(obj)/,$(lib-y)) |
81 | subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y)) |
82 | real-objs-y := $(addprefix $(obj)/,$(real-objs-y)) |
83 | real-objs-m := $(addprefix $(obj)/,$(real-objs-m)) |
84 | single-used-m := $(addprefix $(obj)/,$(single-used-m)) |
85 | multi-used-y := $(addprefix $(obj)/,$(multi-used-y)) |
86 | multi-used-m := $(addprefix $(obj)/,$(multi-used-m)) |
87 | multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y)) |
88 | multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m)) |
89 | subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) |
90 | obj-dirs := $(addprefix $(obj)/,$(obj-dirs)) |
91 | |
92 | # These flags are needed for modversions and compiling, so we define them here |
93 | # already |
94 | # $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will |
95 | # end up in (or would, if it gets compiled in) |
96 | # Note: It's possible that one object gets potentially linked into more |
97 | # than one module. In that case KBUILD_MODNAME will be set to foo_bar, |
98 | # where foo and bar are the name of the modules. |
99 | name-fix = $(subst $(comma),_,$(subst -,_,$1)) |
100 | basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))" |
101 | modname_flags = $(if $(filter 1,$(words $(modname))),\ |
102 | -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))") |
103 | |
104 | #hash values |
105 | ifdef CONFIG_DYNAMIC_DEBUG |
106 | debug_flags = -D"DEBUG_HASH=$(shell ./scripts/basic/hash djb2 $(@D)$(modname))"\ |
107 | -D"DEBUG_HASH2=$(shell ./scripts/basic/hash r5 $(@D)$(modname))" |
108 | else |
109 | debug_flags = |
110 | endif |
111 | |
112 | orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \ |
113 | $(ccflags-y) $(CFLAGS_$(basetarget).o) |
114 | _c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags)) |
115 | _a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \ |
116 | $(asflags-y) $(AFLAGS_$(basetarget).o) |
117 | _cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F)) |
118 | |
119 | # |
120 | # Enable gcov profiling flags for a file, directory or for all files depending |
121 | # on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL |
122 | # (in this order) |
123 | # |
124 | ifeq ($(CONFIG_GCOV_KERNEL),y) |
125 | _c_flags += $(if $(patsubst n%,, \ |
126 | $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \ |
127 | $(CFLAGS_GCOV)) |
128 | endif |
129 | |
130 | ifdef CONFIG_SYMBOL_PREFIX |
131 | _cpp_flags += -DSYMBOL_PREFIX=$(patsubst "%",%,$(CONFIG_SYMBOL_PREFIX)) |
132 | endif |
133 | |
134 | |
135 | # If building the kernel in a separate objtree expand all occurrences |
136 | # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). |
137 | |
138 | ifeq ($(KBUILD_SRC),) |
139 | __c_flags = $(_c_flags) |
140 | __a_flags = $(_a_flags) |
141 | __cpp_flags = $(_cpp_flags) |
142 | else |
143 | |
144 | # -I$(obj) locates generated .h files |
145 | # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files |
146 | # and locates generated .h files |
147 | # FIXME: Replace both with specific CFLAGS* statements in the makefiles |
148 | __c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags) |
149 | __a_flags = $(call flags,_a_flags) |
150 | __cpp_flags = $(call flags,_cpp_flags) |
151 | endif |
152 | |
153 | c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
154 | $(__c_flags) $(modkern_cflags) \ |
155 | -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) \ |
156 | $(debug_flags) |
157 | |
158 | a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
159 | $(__a_flags) $(modkern_aflags) |
160 | |
161 | cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
162 | $(__cpp_flags) |
163 | |
164 | ld_flags = $(LDFLAGS) $(ldflags-y) |
165 | |
166 | # Finds the multi-part object the current object will be linked into |
167 | modname-multi = $(sort $(foreach m,$(multi-used),\ |
168 | $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=)))) |
169 | |
170 | # Shipped files |
171 | # =========================================================================== |
172 | |
173 | quiet_cmd_shipped = SHIPPED $@ |
174 | cmd_shipped = cat $< > $@ |
175 | |
176 | $(obj)/%:: $(src)/%_shipped |
177 | $(call cmd,shipped) |
178 | |
179 | # Commands useful for building a boot image |
180 | # =========================================================================== |
181 | # |
182 | # Use as following: |
183 | # |
184 | # target: source(s) FORCE |
185 | # $(if_changed,ld/objcopy/gzip) |
186 | # |
187 | # and add target to extra-y so that we know we have to |
188 | # read in the saved command line |
189 | |
190 | # Linking |
191 | # --------------------------------------------------------------------------- |
192 | |
193 | quiet_cmd_ld = LD $@ |
194 | cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \ |
195 | $(filter-out FORCE,$^) -o $@ |
196 | |
197 | # Objcopy |
198 | # --------------------------------------------------------------------------- |
199 | |
200 | quiet_cmd_objcopy = OBJCOPY $@ |
201 | cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ |
202 | |
203 | # Gzip |
204 | # --------------------------------------------------------------------------- |
205 | |
206 | quiet_cmd_gzip = GZIP $@ |
207 | cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -f -9 > $@) || \ |
208 | (rm -f $@ ; false) |
209 | |
210 | |
211 | # Bzip2 |
212 | # --------------------------------------------------------------------------- |
213 | |
214 | # Bzip2 and LZMA do not include size in file... so we have to fake that; |
215 | # append the size as a 32-bit littleendian number as gzip does. |
216 | size_append = printf $(shell \ |
217 | dec_size=0; \ |
218 | for F in $1; do \ |
219 | fsize=$$(stat -c "%s" $$F); \ |
220 | dec_size=$$(expr $$dec_size + $$fsize); \ |
221 | done; \ |
222 | printf "%08x\n" $$dec_size | \ |
223 | sed 's/\(..\)/\1 /g' | { \ |
224 | read ch0 ch1 ch2 ch3; \ |
225 | for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \ |
226 | printf '%s%03o' '\\' $$((0x$$ch)); \ |
227 | done; \ |
228 | } \ |
229 | ) |
230 | |
231 | quiet_cmd_bzip2 = BZIP2 $@ |
232 | cmd_bzip2 = (cat $(filter-out FORCE,$^) | \ |
233 | bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
234 | (rm -f $@ ; false) |
235 | |
236 | # Lzma |
237 | # --------------------------------------------------------------------------- |
238 | |
239 | quiet_cmd_lzma = LZMA $@ |
240 | cmd_lzma = (cat $(filter-out FORCE,$^) | \ |
241 | lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
242 | (rm -f $@ ; false) |
243 | |
244 | quiet_cmd_lzo = LZO $@ |
245 | cmd_lzo = (cat $(filter-out FORCE,$^) | \ |
246 | lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
247 | (rm -f $@ ; false) |
248 | |
249 | # misc stuff |
250 | # --------------------------------------------------------------------------- |
251 | quote:=" |
252 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9