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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: Files that end up in two or more modules are compiled without the |
97 | # KBUILD_MODNAME definition. The reason is that any made-up name would |
98 | # differ in different configs. |
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 | orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \ |
105 | $(ccflags-y) $(CFLAGS_$(basetarget).o) |
106 | _c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags)) |
107 | _a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \ |
108 | $(asflags-y) $(AFLAGS_$(basetarget).o) |
109 | _cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F)) |
110 | |
111 | # |
112 | # Enable gcov profiling flags for a file, directory or for all files depending |
113 | # on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL |
114 | # (in this order) |
115 | # |
116 | ifeq ($(CONFIG_GCOV_KERNEL),y) |
117 | _c_flags += $(if $(patsubst n%,, \ |
118 | $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \ |
119 | $(CFLAGS_GCOV)) |
120 | endif |
121 | |
122 | ifdef CONFIG_SYMBOL_PREFIX |
123 | _sym_flags = -DSYMBOL_PREFIX=$(patsubst "%",%,$(CONFIG_SYMBOL_PREFIX)) |
124 | _cpp_flags += $(_sym_flags) |
125 | _a_flags += $(_sym_flags) |
126 | endif |
127 | |
128 | |
129 | # If building the kernel in a separate objtree expand all occurrences |
130 | # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). |
131 | |
132 | ifeq ($(KBUILD_SRC),) |
133 | __c_flags = $(_c_flags) |
134 | __a_flags = $(_a_flags) |
135 | __cpp_flags = $(_cpp_flags) |
136 | else |
137 | |
138 | # -I$(obj) locates generated .h files |
139 | # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files |
140 | # and locates generated .h files |
141 | # FIXME: Replace both with specific CFLAGS* statements in the makefiles |
142 | __c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags) |
143 | __a_flags = $(call flags,_a_flags) |
144 | __cpp_flags = $(call flags,_cpp_flags) |
145 | endif |
146 | |
147 | c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
148 | $(__c_flags) $(modkern_cflags) \ |
149 | -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) |
150 | |
151 | a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
152 | $(__a_flags) $(modkern_aflags) |
153 | |
154 | cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
155 | $(__cpp_flags) |
156 | |
157 | ld_flags = $(LDFLAGS) $(ldflags-y) |
158 | |
159 | dtc_cpp_flags = -Wp,-MD,$(depfile) -nostdinc \ |
160 | -I$(srctree)/arch/$(SRCARCH)/boot/dts \ |
161 | -I$(srctree)/arch/$(SRCARCH)/include/dts \ |
162 | -undef -D__DTS__ |
163 | |
164 | # Finds the multi-part object the current object will be linked into |
165 | modname-multi = $(sort $(foreach m,$(multi-used),\ |
166 | $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=)))) |
167 | |
168 | ifdef REGENERATE_PARSERS |
169 | |
170 | # GPERF |
171 | # --------------------------------------------------------------------------- |
172 | quiet_cmd_gperf = GPERF $@ |
173 | cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $< |
174 | |
175 | .PRECIOUS: $(src)/%.hash.c_shipped |
176 | $(src)/%.hash.c_shipped: $(src)/%.gperf |
177 | $(call cmd,gperf) |
178 | |
179 | # LEX |
180 | # --------------------------------------------------------------------------- |
181 | LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy) |
182 | |
183 | quiet_cmd_flex = LEX $@ |
184 | cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $< |
185 | |
186 | .PRECIOUS: $(src)/%.lex.c_shipped |
187 | $(src)/%.lex.c_shipped: $(src)/%.l |
188 | $(call cmd,flex) |
189 | |
190 | # YACC |
191 | # --------------------------------------------------------------------------- |
192 | YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy) |
193 | |
194 | quiet_cmd_bison = YACC $@ |
195 | cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $< |
196 | |
197 | .PRECIOUS: $(src)/%.tab.c_shipped |
198 | $(src)/%.tab.c_shipped: $(src)/%.y |
199 | $(call cmd,bison) |
200 | |
201 | quiet_cmd_bison_h = YACC $@ |
202 | cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $< |
203 | |
204 | .PRECIOUS: $(src)/%.tab.h_shipped |
205 | $(src)/%.tab.h_shipped: $(src)/%.y |
206 | $(call cmd,bison_h) |
207 | |
208 | endif |
209 | |
210 | # Shipped files |
211 | # =========================================================================== |
212 | |
213 | quiet_cmd_shipped = SHIPPED $@ |
214 | cmd_shipped = cat $< > $@ |
215 | |
216 | $(obj)/%: $(src)/%_shipped |
217 | $(call cmd,shipped) |
218 | |
219 | # Commands useful for building a boot image |
220 | # =========================================================================== |
221 | # |
222 | # Use as following: |
223 | # |
224 | # target: source(s) FORCE |
225 | # $(if_changed,ld/objcopy/gzip) |
226 | # |
227 | # and add target to extra-y so that we know we have to |
228 | # read in the saved command line |
229 | |
230 | # Linking |
231 | # --------------------------------------------------------------------------- |
232 | |
233 | quiet_cmd_ld = LD $@ |
234 | cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \ |
235 | $(filter-out FORCE,$^) -o $@ |
236 | |
237 | # Objcopy |
238 | # --------------------------------------------------------------------------- |
239 | |
240 | quiet_cmd_objcopy = OBJCOPY $@ |
241 | cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ |
242 | |
243 | # Gzip |
244 | # --------------------------------------------------------------------------- |
245 | |
246 | quiet_cmd_gzip = GZIP $@ |
247 | cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \ |
248 | (rm -f $@ ; false) |
249 | |
250 | # DTC |
251 | # --------------------------------------------------------------------------- |
252 | |
253 | # Generate an assembly file to wrap the output of the device tree compiler |
254 | quiet_cmd_dt_S_dtb= DTB $@ |
255 | cmd_dt_S_dtb= \ |
256 | ( \ |
257 | echo '\#include <asm-generic/vmlinux.lds.h>'; \ |
258 | echo '.section .dtb.init.rodata,"a"'; \ |
259 | echo '.balign STRUCT_ALIGNMENT'; \ |
260 | echo '.global __dtb_$(*F)_begin'; \ |
261 | echo '__dtb_$(*F)_begin:'; \ |
262 | echo '.incbin "$<" '; \ |
263 | echo '__dtb_$(*F)_end:'; \ |
264 | echo '.global __dtb_$(*F)_end'; \ |
265 | echo '.balign STRUCT_ALIGNMENT'; \ |
266 | ) > $@ |
267 | |
268 | $(obj)/%.dtb.S: $(obj)/%.dtb |
269 | $(call cmd,dt_S_dtb) |
270 | |
271 | quiet_cmd_dtc = DTC $@ |
272 | cmd_dtc = $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) -d $(depfile) $< |
273 | |
274 | $(obj)/%.dtb: $(src)/%.dts FORCE |
275 | $(call if_changed_dep,dtc) |
276 | |
277 | dtc-tmp = $(subst $(comma),_,$(dot-target).dts) |
278 | |
279 | quiet_cmd_dtc_cpp = DTC+CPP $@ |
280 | cmd_dtc_cpp = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ |
281 | $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) $(dtc-tmp) |
282 | |
283 | $(obj)/%.dtb: $(src)/%.dtsp FORCE |
284 | $(call if_changed_dep,dtc_cpp) |
285 | |
286 | # Bzip2 |
287 | # --------------------------------------------------------------------------- |
288 | |
289 | # Bzip2 and LZMA do not include size in file... so we have to fake that; |
290 | # append the size as a 32-bit littleendian number as gzip does. |
291 | size_append = printf $(shell \ |
292 | dec_size=0; \ |
293 | for F in $1; do \ |
294 | fsize=$$(stat -c "%s" $$F); \ |
295 | dec_size=$$(expr $$dec_size + $$fsize); \ |
296 | done; \ |
297 | printf "%08x\n" $$dec_size | \ |
298 | sed 's/\(..\)/\1 /g' | { \ |
299 | read ch0 ch1 ch2 ch3; \ |
300 | for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \ |
301 | printf '%s%03o' '\\' $$((0x$$ch)); \ |
302 | done; \ |
303 | } \ |
304 | ) |
305 | |
306 | quiet_cmd_bzip2 = BZIP2 $@ |
307 | cmd_bzip2 = (cat $(filter-out FORCE,$^) | \ |
308 | bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
309 | (rm -f $@ ; false) |
310 | |
311 | # Lzma |
312 | # --------------------------------------------------------------------------- |
313 | |
314 | quiet_cmd_lzma = LZMA $@ |
315 | cmd_lzma = (cat $(filter-out FORCE,$^) | \ |
316 | lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
317 | (rm -f $@ ; false) |
318 | |
319 | quiet_cmd_lzo = LZO $@ |
320 | cmd_lzo = (cat $(filter-out FORCE,$^) | \ |
321 | lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
322 | (rm -f $@ ; false) |
323 | |
324 | # U-Boot mkimage |
325 | # --------------------------------------------------------------------------- |
326 | |
327 | MKIMAGE := $(srctree)/scripts/mkuboot.sh |
328 | |
329 | # SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces |
330 | # the number of overrides in arch makefiles |
331 | UIMAGE_ARCH ?= $(SRCARCH) |
332 | UIMAGE_COMPRESSION ?= $(if $(2),$(2),none) |
333 | UIMAGE_OPTS-y ?= |
334 | UIMAGE_TYPE ?= kernel |
335 | UIMAGE_LOADADDR ?= arch_must_set_this |
336 | UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR) |
337 | UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)' |
338 | UIMAGE_IN ?= $< |
339 | UIMAGE_OUT ?= $@ |
340 | |
341 | quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT) |
342 | cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \ |
343 | -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \ |
344 | -T $(UIMAGE_TYPE) \ |
345 | -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \ |
346 | -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT) |
347 | |
348 | # XZ |
349 | # --------------------------------------------------------------------------- |
350 | # Use xzkern to compress the kernel image and xzmisc to compress other things. |
351 | # |
352 | # xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage |
353 | # of the kernel decompressor. A BCJ filter is used if it is available for |
354 | # the target architecture. xzkern also appends uncompressed size of the data |
355 | # using size_append. The .xz format has the size information available at |
356 | # the end of the file too, but it's in more complex format and it's good to |
357 | # avoid changing the part of the boot code that reads the uncompressed size. |
358 | # Note that the bytes added by size_append will make the xz tool think that |
359 | # the file is corrupt. This is expected. |
360 | # |
361 | # xzmisc doesn't use size_append, so it can be used to create normal .xz |
362 | # files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very |
363 | # big dictionary would increase the memory usage too much in the multi-call |
364 | # decompression mode. A BCJ filter isn't used either. |
365 | quiet_cmd_xzkern = XZKERN $@ |
366 | cmd_xzkern = (cat $(filter-out FORCE,$^) | \ |
367 | sh $(srctree)/scripts/xz_wrap.sh && \ |
368 | $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
369 | (rm -f $@ ; false) |
370 | |
371 | quiet_cmd_xzmisc = XZMISC $@ |
372 | cmd_xzmisc = (cat $(filter-out FORCE,$^) | \ |
373 | xz --check=crc32 --lzma2=dict=1MiB) > $@ || \ |
374 | (rm -f $@ ; false) |
375 | |
376 | # misc stuff |
377 | # --------------------------------------------------------------------------- |
378 | quote:=" |
379 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
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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