]>
Commit | Line | Data |
---|---|---|
f77bf014 SR |
1 | # Backward compatibility |
2 | asflags-y += $(EXTRA_AFLAGS) | |
3 | ccflags-y += $(EXTRA_CFLAGS) | |
4 | cppflags-y += $(EXTRA_CPPFLAGS) | |
5 | ldflags-y += $(EXTRA_LDFLAGS) | |
6 | ||
720097d8 SR |
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 | ||
1da177e4 LT |
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) | |
38385f8f | 30 | # o if we encounter foo/ in $(obj-m), remove it from $(obj-m) |
1da177e4 LT |
31 | # and add the directory to the list of dirs to descend into: $(subdir-m) |
32 | ||
551559e1 TH |
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 | ||
1da177e4 LT |
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 | ||
38385f8f | 49 | # if $(foo-objs) exists, foo.o is a composite object |
1da177e4 | 50 | multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) |
cf4f2193 | 51 | multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))), $(m)))) |
1da177e4 LT |
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 | ||
f5fb9765 SR |
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)) | |
1da177e4 LT |
64 | |
65 | # $(obj-dirs) is a list of directories that contain object files | |
4d47dde4 | 66 | obj-dirs := $(dir $(multi-objs) $(obj-y)) |
1da177e4 LT |
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) | |
cf4f2193 | 70 | real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m))) |
1da177e4 LT |
71 | |
72 | # Add subdir path | |
73 | ||
74 | extra-y := $(addprefix $(obj)/,$(extra-y)) | |
75 | always := $(addprefix $(obj)/,$(always)) | |
76 | targets := $(addprefix $(obj)/,$(targets)) | |
551559e1 | 77 | modorder := $(addprefix $(obj)/,$(modorder)) |
1da177e4 LT |
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 | ||
1da177e4 LT |
92 | # These flags are needed for modversions and compiling, so we define them here |
93 | # already | |
38385f8f | 94 | # $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will |
1da177e4 | 95 | # end up in (or would, if it gets compiled in) |
5bb0571b MM |
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. | |
f83b5e32 | 99 | name-fix = $(subst $(comma),_,$(subst -,_,$1)) |
5e8d780d | 100 | basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))" |
f83b5e32 UR |
101 | modname_flags = $(if $(filter 1,$(words $(modname))),\ |
102 | -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))") | |
1da177e4 | 103 | |
720097d8 | 104 | orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \ |
d8672b40 | 105 | $(ccflags-y) $(CFLAGS_$(basetarget).o) |
656ee82c | 106 | _c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags)) |
a7e137eb | 107 | orig_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \ |
d8672b40 | 108 | $(asflags-y) $(AFLAGS_$(basetarget).o) |
a7e137eb | 109 | _a_flags = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags)) |
f77bf014 | 110 | _cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F)) |
1da177e4 | 111 | |
2521f2c2 PO |
112 | # |
113 | # Enable gcov profiling flags for a file, directory or for all files depending | |
114 | # on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL | |
115 | # (in this order) | |
116 | # | |
117 | ifeq ($(CONFIG_GCOV_KERNEL),y) | |
118 | _c_flags += $(if $(patsubst n%,, \ | |
119 | $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \ | |
120 | $(CFLAGS_GCOV)) | |
121 | endif | |
122 | ||
0b24becc AR |
123 | # |
124 | # Enable address sanitizer flags for kernel except some files or directories | |
125 | # we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE) | |
126 | # | |
127 | ifeq ($(CONFIG_KASAN),y) | |
128 | _c_flags += $(if $(patsubst n%,, \ | |
129 | $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \ | |
130 | $(CFLAGS_KASAN)) | |
131 | endif | |
132 | ||
c6d30853 AR |
133 | ifeq ($(CONFIG_UBSAN),y) |
134 | _c_flags += $(if $(patsubst n%,, \ | |
135 | $(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \ | |
136 | $(CFLAGS_UBSAN)) | |
137 | endif | |
138 | ||
5c9a8750 DV |
139 | ifeq ($(CONFIG_KCOV),y) |
140 | _c_flags += $(if $(patsubst n%,, \ | |
141 | $(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)y), \ | |
142 | $(CFLAGS_KCOV)) | |
143 | endif | |
144 | ||
1da177e4 LT |
145 | # If building the kernel in a separate objtree expand all occurrences |
146 | # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). | |
147 | ||
148 | ifeq ($(KBUILD_SRC),) | |
149 | __c_flags = $(_c_flags) | |
150 | __a_flags = $(_a_flags) | |
151 | __cpp_flags = $(_cpp_flags) | |
152 | else | |
153 | ||
1da177e4 LT |
154 | # -I$(obj) locates generated .h files |
155 | # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files | |
156 | # and locates generated .h files | |
157 | # FIXME: Replace both with specific CFLAGS* statements in the makefiles | |
158 | __c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags) | |
159 | __a_flags = $(call flags,_a_flags) | |
160 | __cpp_flags = $(call flags,_cpp_flags) | |
161 | endif | |
162 | ||
d8672b40 SR |
163 | c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
164 | $(__c_flags) $(modkern_cflags) \ | |
52159d98 | 165 | -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) |
1da177e4 | 166 | |
d8672b40 | 167 | a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
1da177e4 LT |
168 | $(__a_flags) $(modkern_aflags) |
169 | ||
d8672b40 SR |
170 | cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
171 | $(__cpp_flags) | |
1da177e4 | 172 | |
f77bf014 | 173 | ld_flags = $(LDFLAGS) $(ldflags-y) |
1da177e4 | 174 | |
b0a4d8b3 | 175 | dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \ |
e570d7c1 | 176 | -I$(srctree)/arch/$(SRCARCH)/boot/dts \ |
c58299aa | 177 | -I$(srctree)/arch/$(SRCARCH)/boot/dts/include \ |
b5190516 | 178 | -I$(srctree)/drivers/of/testcase-data \ |
e570d7c1 SW |
179 | -undef -D__DTS__ |
180 | ||
1da177e4 LT |
181 | # Finds the multi-part object the current object will be linked into |
182 | modname-multi = $(sort $(foreach m,$(multi-used),\ | |
183 | $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=)))) | |
184 | ||
c8589d1e MY |
185 | # Useful for describing the dependency of composite objects |
186 | # Usage: | |
187 | # $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add) | |
188 | define multi_depend | |
189 | $(foreach m, $(notdir $1), \ | |
190 | $(eval $(obj)/$m: \ | |
191 | $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s))))))) | |
192 | endef | |
193 | ||
7373f4f8 AL |
194 | ifdef REGENERATE_PARSERS |
195 | ||
196 | # GPERF | |
197 | # --------------------------------------------------------------------------- | |
198 | quiet_cmd_gperf = GPERF $@ | |
199 | cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $< | |
200 | ||
58238c81 | 201 | .PRECIOUS: $(src)/%.hash.c_shipped |
7373f4f8 AL |
202 | $(src)/%.hash.c_shipped: $(src)/%.gperf |
203 | $(call cmd,gperf) | |
204 | ||
205 | # LEX | |
206 | # --------------------------------------------------------------------------- | |
207 | LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy) | |
208 | ||
209 | quiet_cmd_flex = LEX $@ | |
210 | cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $< | |
211 | ||
58238c81 | 212 | .PRECIOUS: $(src)/%.lex.c_shipped |
7373f4f8 AL |
213 | $(src)/%.lex.c_shipped: $(src)/%.l |
214 | $(call cmd,flex) | |
215 | ||
216 | # YACC | |
217 | # --------------------------------------------------------------------------- | |
218 | YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy) | |
219 | ||
220 | quiet_cmd_bison = YACC $@ | |
221 | cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $< | |
222 | ||
58238c81 | 223 | .PRECIOUS: $(src)/%.tab.c_shipped |
7373f4f8 AL |
224 | $(src)/%.tab.c_shipped: $(src)/%.y |
225 | $(call cmd,bison) | |
226 | ||
227 | quiet_cmd_bison_h = YACC $@ | |
228 | cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $< | |
229 | ||
58238c81 | 230 | .PRECIOUS: $(src)/%.tab.h_shipped |
7373f4f8 AL |
231 | $(src)/%.tab.h_shipped: $(src)/%.y |
232 | $(call cmd,bison_h) | |
233 | ||
234 | endif | |
235 | ||
1da177e4 LT |
236 | # Shipped files |
237 | # =========================================================================== | |
238 | ||
239 | quiet_cmd_shipped = SHIPPED $@ | |
240 | cmd_shipped = cat $< > $@ | |
241 | ||
991d76c9 | 242 | $(obj)/%: $(src)/%_shipped |
1da177e4 LT |
243 | $(call cmd,shipped) |
244 | ||
245 | # Commands useful for building a boot image | |
246 | # =========================================================================== | |
38385f8f | 247 | # |
1da177e4 LT |
248 | # Use as following: |
249 | # | |
250 | # target: source(s) FORCE | |
251 | # $(if_changed,ld/objcopy/gzip) | |
252 | # | |
836caba7 | 253 | # and add target to extra-y so that we know we have to |
1da177e4 LT |
254 | # read in the saved command line |
255 | ||
256 | # Linking | |
257 | # --------------------------------------------------------------------------- | |
258 | ||
259 | quiet_cmd_ld = LD $@ | |
f77bf014 | 260 | cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \ |
38385f8f | 261 | $(filter-out FORCE,$^) -o $@ |
1da177e4 LT |
262 | |
263 | # Objcopy | |
264 | # --------------------------------------------------------------------------- | |
265 | ||
266 | quiet_cmd_objcopy = OBJCOPY $@ | |
267 | cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ | |
268 | ||
269 | # Gzip | |
270 | # --------------------------------------------------------------------------- | |
271 | ||
272 | quiet_cmd_gzip = GZIP $@ | |
6ae9ecb8 | 273 | cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \ |
d3dd3b5a | 274 | (rm -f $@ ; false) |
1da177e4 | 275 | |
aab94339 DB |
276 | # DTC |
277 | # --------------------------------------------------------------------------- | |
6b22b3d1 | 278 | DTC ?= $(objtree)/scripts/dtc/dtc |
aab94339 DB |
279 | |
280 | # Generate an assembly file to wrap the output of the device tree compiler | |
1c00a47e | 281 | quiet_cmd_dt_S_dtb= DTB $@ |
aab94339 DB |
282 | cmd_dt_S_dtb= \ |
283 | ( \ | |
284 | echo '\#include <asm-generic/vmlinux.lds.h>'; \ | |
285 | echo '.section .dtb.init.rodata,"a"'; \ | |
286 | echo '.balign STRUCT_ALIGNMENT'; \ | |
287 | echo '.global __dtb_$(*F)_begin'; \ | |
288 | echo '__dtb_$(*F)_begin:'; \ | |
289 | echo '.incbin "$<" '; \ | |
290 | echo '__dtb_$(*F)_end:'; \ | |
291 | echo '.global __dtb_$(*F)_end'; \ | |
292 | echo '.balign STRUCT_ALIGNMENT'; \ | |
293 | ) > $@ | |
294 | ||
295 | $(obj)/%.dtb.S: $(obj)/%.dtb | |
296 | $(call cmd,dt_S_dtb) | |
297 | ||
298 | quiet_cmd_dtc = DTC $@ | |
77479b38 NR |
299 | cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \ |
300 | $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ | |
6b22b3d1 | 301 | $(DTC) -O dtb -o $@ -b 0 \ |
ad061568 | 302 | -i $(dir $<) $(DTC_FLAGS) \ |
b0a4d8b3 IC |
303 | -d $(depfile).dtc.tmp $(dtc-tmp) ; \ |
304 | cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) | |
1da177e4 | 305 | |
90b335fb SW |
306 | $(obj)/%.dtb: $(src)/%.dts FORCE |
307 | $(call if_changed_dep,dtc) | |
308 | ||
b0a4d8b3 | 309 | dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp) |
22435f38 | 310 | |
bc22c17e AK |
311 | # Bzip2 |
312 | # --------------------------------------------------------------------------- | |
313 | ||
d3dd3b5a PA |
314 | # Bzip2 and LZMA do not include size in file... so we have to fake that; |
315 | # append the size as a 32-bit littleendian number as gzip does. | |
4a2ff67c | 316 | size_append = printf $(shell \ |
d3dd3b5a PA |
317 | dec_size=0; \ |
318 | for F in $1; do \ | |
319 | fsize=$$(stat -c "%s" $$F); \ | |
320 | dec_size=$$(expr $$dec_size + $$fsize); \ | |
321 | done; \ | |
1373411a JN |
322 | printf "%08x\n" $$dec_size | \ |
323 | sed 's/\(..\)/\1 /g' | { \ | |
324 | read ch0 ch1 ch2 ch3; \ | |
325 | for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \ | |
326 | printf '%s%03o' '\\' $$((0x$$ch)); \ | |
327 | done; \ | |
328 | } \ | |
d3dd3b5a PA |
329 | ) |
330 | ||
331 | quiet_cmd_bzip2 = BZIP2 $@ | |
332 | cmd_bzip2 = (cat $(filter-out FORCE,$^) | \ | |
333 | bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ | |
334 | (rm -f $@ ; false) | |
bc22c17e AK |
335 | |
336 | # Lzma | |
337 | # --------------------------------------------------------------------------- | |
338 | ||
339 | quiet_cmd_lzma = LZMA $@ | |
d3dd3b5a PA |
340 | cmd_lzma = (cat $(filter-out FORCE,$^) | \ |
341 | lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ | |
342 | (rm -f $@ ; false) | |
7dd65feb | 343 | |
2d74b2c6 | 344 | quiet_cmd_lzo = LZO $@ |
7dd65feb AT |
345 | cmd_lzo = (cat $(filter-out FORCE,$^) | \ |
346 | lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ | |
347 | (rm -f $@ ; false) | |
d61931d8 | 348 | |
e76e1fdf KL |
349 | quiet_cmd_lz4 = LZ4 $@ |
350 | cmd_lz4 = (cat $(filter-out FORCE,$^) | \ | |
351 | lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ | |
352 | (rm -f $@ ; false) | |
353 | ||
e3393645 SW |
354 | # U-Boot mkimage |
355 | # --------------------------------------------------------------------------- | |
356 | ||
357 | MKIMAGE := $(srctree)/scripts/mkuboot.sh | |
358 | ||
359 | # SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces | |
360 | # the number of overrides in arch makefiles | |
361 | UIMAGE_ARCH ?= $(SRCARCH) | |
362 | UIMAGE_COMPRESSION ?= $(if $(2),$(2),none) | |
363 | UIMAGE_OPTS-y ?= | |
364 | UIMAGE_TYPE ?= kernel | |
365 | UIMAGE_LOADADDR ?= arch_must_set_this | |
366 | UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR) | |
367 | UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)' | |
368 | UIMAGE_IN ?= $< | |
369 | UIMAGE_OUT ?= $@ | |
370 | ||
371 | quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT) | |
372 | cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \ | |
373 | -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \ | |
374 | -T $(UIMAGE_TYPE) \ | |
375 | -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \ | |
376 | -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT) | |
377 | ||
24fa0402 LC |
378 | # XZ |
379 | # --------------------------------------------------------------------------- | |
380 | # Use xzkern to compress the kernel image and xzmisc to compress other things. | |
381 | # | |
382 | # xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage | |
383 | # of the kernel decompressor. A BCJ filter is used if it is available for | |
384 | # the target architecture. xzkern also appends uncompressed size of the data | |
385 | # using size_append. The .xz format has the size information available at | |
386 | # the end of the file too, but it's in more complex format and it's good to | |
387 | # avoid changing the part of the boot code that reads the uncompressed size. | |
388 | # Note that the bytes added by size_append will make the xz tool think that | |
389 | # the file is corrupt. This is expected. | |
390 | # | |
391 | # xzmisc doesn't use size_append, so it can be used to create normal .xz | |
392 | # files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very | |
393 | # big dictionary would increase the memory usage too much in the multi-call | |
394 | # decompression mode. A BCJ filter isn't used either. | |
395 | quiet_cmd_xzkern = XZKERN $@ | |
396 | cmd_xzkern = (cat $(filter-out FORCE,$^) | \ | |
397 | sh $(srctree)/scripts/xz_wrap.sh && \ | |
398 | $(call size_append, $(filter-out FORCE,$^))) > $@ || \ | |
399 | (rm -f $@ ; false) | |
400 | ||
401 | quiet_cmd_xzmisc = XZMISC $@ | |
402 | cmd_xzmisc = (cat $(filter-out FORCE,$^) | \ | |
403 | xz --check=crc32 --lzma2=dict=1MiB) > $@ || \ | |
404 | (rm -f $@ ; false) |