xref: /openbmc/u-boot/scripts/Makefile.lib (revision 00caae6d47645e68d6e5277aceb69592b49381a6)
1 #
2 # SPDX-License-Identifier:	GPL-2.0
3 #
4 # Backward compatibility
5 asflags-y  += $(EXTRA_AFLAGS)
6 ccflags-y  += $(EXTRA_CFLAGS)
7 cppflags-y += $(EXTRA_CPPFLAGS)
8 ldflags-y  += $(EXTRA_LDFLAGS)
9 
10 #
11 # flags that take effect in sub directories
12 export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y)
13 export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(subdir-ccflags-y)
14 
15 # Figure out what we need to build from the various variables
16 # ===========================================================================
17 
18 # When an object is listed to be built compiled-in and modular,
19 # only build the compiled-in version
20 
21 obj-m := $(filter-out $(obj-y),$(obj-m))
22 
23 # Libraries are always collected in one lib file.
24 # Filter out objects already built-in
25 
26 lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
27 
28 
29 # Handle objects in subdirs
30 # ---------------------------------------------------------------------------
31 # o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o
32 #   and add the directory to the list of dirs to descend into: $(subdir-y)
33 # o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
34 #   and add the directory to the list of dirs to descend into: $(subdir-m)
35 
36 # Determine modorder.
37 # Unfortunately, we don't have information about ordering between -y
38 # and -m subdirs.  Just put -y's first.
39 modorder	:= $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
40 
41 __subdir-y	:= $(patsubst %/,%,$(filter %/, $(obj-y)))
42 subdir-y	+= $(__subdir-y)
43 __subdir-m	:= $(patsubst %/,%,$(filter %/, $(obj-m)))
44 subdir-m	+= $(__subdir-m)
45 obj-y		:= $(patsubst %/, %/built-in.o, $(obj-y))
46 obj-m		:= $(filter-out %/, $(obj-m))
47 
48 # Subdirectories we need to descend into
49 
50 subdir-ym	:= $(sort $(subdir-y) $(subdir-m))
51 
52 # if $(foo-objs) exists, foo.o is a composite object
53 multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
54 multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
55 multi-used   := $(multi-used-y) $(multi-used-m)
56 single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
57 
58 # Build list of the parts of our composite objects, our composite
59 # objects depend on those (obviously)
60 multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y)))
61 multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y)))
62 multi-objs   := $(multi-objs-y) $(multi-objs-m)
63 
64 # $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
65 # tell kbuild to descend
66 subdir-obj-y := $(filter %/built-in.o, $(obj-y))
67 
68 # $(obj-dirs) is a list of directories that contain object files
69 obj-dirs := $(dir $(multi-objs) $(obj-y))
70 
71 # Replace multi-part objects by their individual parts, look at local dir only
72 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)
73 real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
74 
75 # Add subdir path
76 
77 extra-y		:= $(addprefix $(obj)/,$(extra-y))
78 always		:= $(addprefix $(obj)/,$(always))
79 targets		:= $(addprefix $(obj)/,$(targets))
80 modorder	:= $(addprefix $(obj)/,$(modorder))
81 obj-y		:= $(addprefix $(obj)/,$(obj-y))
82 obj-m		:= $(addprefix $(obj)/,$(obj-m))
83 lib-y		:= $(addprefix $(obj)/,$(lib-y))
84 subdir-obj-y	:= $(addprefix $(obj)/,$(subdir-obj-y))
85 real-objs-y	:= $(addprefix $(obj)/,$(real-objs-y))
86 real-objs-m	:= $(addprefix $(obj)/,$(real-objs-m))
87 single-used-m	:= $(addprefix $(obj)/,$(single-used-m))
88 multi-used-y	:= $(addprefix $(obj)/,$(multi-used-y))
89 multi-used-m	:= $(addprefix $(obj)/,$(multi-used-m))
90 multi-objs-y	:= $(addprefix $(obj)/,$(multi-objs-y))
91 multi-objs-m	:= $(addprefix $(obj)/,$(multi-objs-m))
92 subdir-ym	:= $(addprefix $(obj)/,$(subdir-ym))
93 obj-dirs	:= $(addprefix $(obj)/,$(obj-dirs))
94 
95 # These flags are needed for modversions and compiling, so we define them here
96 # already
97 # $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
98 # end up in (or would, if it gets compiled in)
99 # Note: Files that end up in two or more modules are compiled without the
100 #       KBUILD_MODNAME definition. The reason is that any made-up name would
101 #       differ in different configs.
102 name-fix = $(subst $(comma),_,$(subst -,_,$1))
103 basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))"
104 modname_flags  = $(if $(filter 1,$(words $(modname))),\
105                  -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))")
106 
107 orig_c_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
108                  $(ccflags-y) $(CFLAGS_$(basetarget).o)
109 _c_flags       = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
110 orig_a_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
111                  $(asflags-y) $(AFLAGS_$(basetarget).o)
112 _a_flags       = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags))
113 _cpp_flags     = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
114 
115 #
116 # Enable gcov profiling flags for a file, directory or for all files depending
117 # on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
118 # (in this order)
119 #
120 ifeq ($(CONFIG_GCOV_KERNEL),y)
121 _c_flags += $(if $(patsubst n%,, \
122 		$(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
123 		$(CFLAGS_GCOV))
124 endif
125 
126 #
127 # Enable address sanitizer flags for kernel except some files or directories
128 # we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
129 #
130 ifeq ($(CONFIG_KASAN),y)
131 _c_flags += $(if $(patsubst n%,, \
132 		$(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
133 		$(CFLAGS_KASAN))
134 endif
135 
136 # If building the kernel in a separate objtree expand all occurrences
137 # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
138 
139 ifeq ($(KBUILD_SRC),)
140 __c_flags	= $(_c_flags)
141 __a_flags	= $(_a_flags)
142 __cpp_flags     = $(_cpp_flags)
143 else
144 
145 # -I$(obj) locates generated .h files
146 # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
147 #   and locates generated .h files
148 # FIXME: Replace both with specific CFLAGS* statements in the makefiles
149 __c_flags	= $(call addtree,-I$(obj)) $(call flags,_c_flags)
150 __a_flags	=                          $(call flags,_a_flags)
151 __cpp_flags     =                          $(call flags,_cpp_flags)
152 endif
153 
154 # Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE
155 c_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE)     \
156 		 $(__c_flags) $(modkern_cflags)                           \
157 		 -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags)
158 
159 a_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE)     \
160 		 $(__a_flags) $(modkern_aflags)
161 
162 cpp_flags      = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE)     \
163 		 $(__cpp_flags)
164 
165 ld_flags       = $(LDFLAGS) $(ldflags-y)
166 
167 # Try these files in order to find the U-Boot-specific .dtsi include file
168 u_boot_dtsi_options = $(wildcard $(dir $<)$(basename $(notdir $<))-u-boot.dtsi) \
169 	$(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi) \
170 	$(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi) \
171 	$(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi) \
172 	$(wildcard $(dir $<)u-boot.dtsi)
173 
174 # Uncomment for debugging
175 # $(warning u_boot_dtsi_options: $(u_boot_dtsi_options))
176 
177 # We use the first match
178 u_boot_dtsi = $(firstword $(u_boot_dtsi_options))
179 
180 # Modified for U-Boot
181 dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
182 		 -I$(srctree)/arch/$(ARCH)/dts                           \
183 		 -I$(srctree)/arch/$(ARCH)/dts/include                   \
184 		 -Iinclude                                               \
185 		 -I$(srctree)/include                                    \
186 		 -I$(srctree)/arch/$(ARCH)/include                       \
187 		 -include $(srctree)/include/linux/kconfig.h             \
188 		 -D__ASSEMBLY__                                          \
189 		 -undef -D__DTS__
190 
191 # Finds the multi-part object the current object will be linked into
192 modname-multi = $(sort $(foreach m,$(multi-used),\
193 		$(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
194 
195 # Useful for describing the dependency of composite objects
196 # Usage:
197 #   $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
198 define multi_depend
199 $(foreach m, $(notdir $1), \
200 	$(eval $(obj)/$m: \
201 	$(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
202 endef
203 
204 ifdef REGENERATE_PARSERS
205 
206 # GPERF
207 # ---------------------------------------------------------------------------
208 quiet_cmd_gperf = GPERF $@
209       cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $<
210 
211 .PRECIOUS: $(src)/%.hash.c_shipped
212 $(src)/%.hash.c_shipped: $(src)/%.gperf
213 	$(call cmd,gperf)
214 
215 # LEX
216 # ---------------------------------------------------------------------------
217 LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
218 
219 quiet_cmd_flex = LEX     $@
220       cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<
221 
222 .PRECIOUS: $(src)/%.lex.c_shipped
223 $(src)/%.lex.c_shipped: $(src)/%.l
224 	$(call cmd,flex)
225 
226 # YACC
227 # ---------------------------------------------------------------------------
228 YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)
229 
230 quiet_cmd_bison = YACC    $@
231       cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<
232 
233 .PRECIOUS: $(src)/%.tab.c_shipped
234 $(src)/%.tab.c_shipped: $(src)/%.y
235 	$(call cmd,bison)
236 
237 quiet_cmd_bison_h = YACC    $@
238       cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<
239 
240 .PRECIOUS: $(src)/%.tab.h_shipped
241 $(src)/%.tab.h_shipped: $(src)/%.y
242 	$(call cmd,bison_h)
243 
244 endif
245 
246 # Shipped files
247 # ===========================================================================
248 
249 quiet_cmd_shipped = SHIPPED $@
250 cmd_shipped = cat $< > $@
251 
252 $(obj)/%: $(src)/%_shipped
253 	$(call cmd,shipped)
254 
255 # Commands useful for building a boot image
256 # ===========================================================================
257 #
258 #	Use as following:
259 #
260 #	target: source(s) FORCE
261 #		$(if_changed,ld/objcopy/gzip)
262 #
263 #	and add target to extra-y so that we know we have to
264 #	read in the saved command line
265 
266 # Linking
267 # ---------------------------------------------------------------------------
268 
269 quiet_cmd_ld = LD      $@
270 cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
271 	       $(filter-out FORCE,$^) -o $@
272 
273 # Objcopy
274 # ---------------------------------------------------------------------------
275 
276 quiet_cmd_objcopy = OBJCOPY $@
277 cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
278 
279 # Gzip
280 # ---------------------------------------------------------------------------
281 
282 quiet_cmd_gzip = GZIP    $@
283 cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
284 	(rm -f $@ ; false)
285 
286 # DTC
287 # ---------------------------------------------------------------------------
288 
289 # Generate an assembly file to wrap the output of the device tree compiler
290 quiet_cmd_dt_S_dtb= DTB     $@
291 # Modified for U-Boot
292 cmd_dt_S_dtb=						\
293 (							\
294 	echo '.section .dtb.init.rodata,"a"';		\
295 	echo '.balign 16';				\
296 	echo '.global __dtb_$(subst -,_,$(*F))_begin';	\
297 	echo '__dtb_$(subst -,_,$(*F))_begin:';		\
298 	echo '.incbin "$<" ';				\
299 	echo '__dtb_$(subst -,_,$(*F))_end:';		\
300 	echo '.global __dtb_$(subst -,_,$(*F))_end';	\
301 	echo '.balign 16';				\
302 ) > $@
303 
304 $(obj)/%.dtb.S: $(obj)/%.dtb
305 	$(call cmd,dt_S_dtb)
306 
307 quiet_cmd_dtc = DTC     $@
308 # Modified for U-Boot
309 # Bring in any U-Boot-specific include at the end of the file
310 cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
311 	cat $< $(if $(u_boot_dtsi),\
312 		| sed "$$ a\#include \"$(u_boot_dtsi)\"") | \
313 		$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) - ; \
314 	$(DTC) -O dtb -o $@ -b 0 \
315 		-i $(dir $<) $(DTC_FLAGS) \
316 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
317 	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
318 
319 $(obj)/%.dtb: $(src)/%.dts FORCE
320 	$(call if_changed_dep,dtc)
321 
322 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
323 
324 # Fonts
325 # ---------------------------------------------------------------------------
326 
327 # Generate an assembly file to wrap the font data
328 quiet_cmd_S_ttf= TTF     $@
329 # Modified for U-Boot
330 cmd_S_ttf=						\
331 (							\
332 	echo '.section .rodata.ttf.init,"a"';		\
333 	echo '.balign 16';				\
334 	echo '.global __ttf_$(*F)_begin';		\
335 	echo '__ttf_$(*F)_begin:';			\
336 	echo '.incbin "$<" ';				\
337 	echo '__ttf_$(*F)_end:';			\
338 	echo '.global __ttf_$(*F)_end';			\
339 	echo '.balign 16';				\
340 ) > $@
341 
342 $(obj)/%.S: $(src)/%.ttf
343 	$(call cmd,S_ttf)
344 
345 # EFI Hello World application
346 # ---------------------------------------------------------------------------
347 
348 # Generate an assembly file to wrap the EFI app
349 cmd_S_efi=						\
350 (							\
351 	echo '.section .rodata.efi.init,"a"';		\
352 	echo '.balign 16';				\
353 	echo '.global __efi_hello_world_begin';		\
354 	echo '__efi_hello_world_begin:';		\
355 	echo '.incbin "$<" ';				\
356 	echo '__efi_hello_world_end:';			\
357 	echo '.global __efi_hello_world_end';		\
358 	echo '.balign 16';				\
359 ) > $@
360 
361 $(obj)/%_efi.S: $(obj)/%.efi
362 	$(call cmd,S_efi)
363 
364 quiet_cmd_efi_objcopy = OBJCOPY $@
365 cmd_efi_objcopy = $(OBJCOPY) -j .header -j .text -j .sdata -j .data -j \
366 		.dynamic -j .dynsym  -j .rel* -j .rela* -j .reloc \
367 		$(if $(EFI_TARGET),$(EFI_TARGET),-O binary) $^ $@
368 
369 $(obj)/%.efi: $(obj)/%.so
370 	$(call cmd,efi_objcopy)
371 
372 quiet_cmd_efi_ld = LD      $@
373 cmd_efi_ld = $(LD) -nostdlib -znocombreloc -T $(EFI_LDS_PATH) -shared \
374 		-Bsymbolic $^ -o $@
375 
376 EFI_LDS_PATH = $(srctree)/arch/$(ARCH)/lib/$(EFI_LDS)
377 
378 $(obj)/helloworld.so: $(EFI_LDS_PATH)
379 
380 $(obj)/helloworld.so: $(obj)/helloworld.o arch/$(ARCH)/lib/$(EFI_CRT0) \
381 		arch/$(ARCH)/lib/$(EFI_RELOC)
382 	$(call cmd,efi_ld)
383 
384 # ACPI
385 # ---------------------------------------------------------------------------
386 quiet_cmd_acpi_c_asl= ASL     $<
387 cmd_acpi_c_asl=         \
388 	$(CPP) -x assembler-with-cpp -D__ASSEMBLY__ -P $(UBOOTINCLUDE) -o $<.tmp $<; \
389 	iasl -p $< -tc $<.tmp $(if $(KBUILD_VERBOSE:1=), >/dev/null) && \
390 	mv $(patsubst %.asl,%.hex,$<) $@
391 
392 $(obj)/dsdt.c:    $(src)/dsdt.asl
393 	$(call cmd,acpi_c_asl)
394 
395 # Bzip2
396 # ---------------------------------------------------------------------------
397 
398 # Bzip2 and LZMA do not include size in file... so we have to fake that;
399 # append the size as a 32-bit littleendian number as gzip does.
400 size_append = printf $(shell						\
401 dec_size=0;								\
402 for F in $1; do								\
403 	fsize=$$(stat -c "%s" $$F);					\
404 	dec_size=$$(expr $$dec_size + $$fsize);				\
405 done;									\
406 printf "%08x\n" $$dec_size |						\
407 	sed 's/\(..\)/\1 /g' | {					\
408 		read ch0 ch1 ch2 ch3;					\
409 		for ch in $$ch3 $$ch2 $$ch1 $$ch0; do			\
410 			printf '%s%03o' '\\' $$((0x$$ch)); 		\
411 		done;							\
412 	}								\
413 )
414 
415 quiet_cmd_bzip2 = BZIP2   $@
416 cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
417 	bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
418 	(rm -f $@ ; false)
419 
420 # Lzma
421 # ---------------------------------------------------------------------------
422 
423 quiet_cmd_lzma = LZMA    $@
424 cmd_lzma = (cat $(filter-out FORCE,$^) | \
425 	lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
426 	(rm -f $@ ; false)
427 
428 quiet_cmd_lzo = LZO     $@
429 cmd_lzo = (cat $(filter-out FORCE,$^) | \
430 	lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
431 	(rm -f $@ ; false)
432 
433 quiet_cmd_lz4 = LZ4     $@
434 cmd_lz4 = (cat $(filter-out FORCE,$^) | \
435 	lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
436 	(rm -f $@ ; false)
437 
438 # U-Boot mkimage
439 # ---------------------------------------------------------------------------
440 
441 MKIMAGE := $(srctree)/scripts/mkuboot.sh
442 
443 # SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
444 # the number of overrides in arch makefiles
445 UIMAGE_ARCH ?= $(SRCARCH)
446 UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
447 UIMAGE_OPTS-y ?=
448 UIMAGE_TYPE ?= kernel
449 UIMAGE_LOADADDR ?= arch_must_set_this
450 UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
451 UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
452 UIMAGE_IN ?= $<
453 UIMAGE_OUT ?= $@
454 
455 quiet_cmd_uimage = UIMAGE  $(UIMAGE_OUT)
456       cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
457 			-C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
458 			-T $(UIMAGE_TYPE) \
459 			-a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
460 			-n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT)
461 
462 # XZ
463 # ---------------------------------------------------------------------------
464 # Use xzkern to compress the kernel image and xzmisc to compress other things.
465 #
466 # xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
467 # of the kernel decompressor. A BCJ filter is used if it is available for
468 # the target architecture. xzkern also appends uncompressed size of the data
469 # using size_append. The .xz format has the size information available at
470 # the end of the file too, but it's in more complex format and it's good to
471 # avoid changing the part of the boot code that reads the uncompressed size.
472 # Note that the bytes added by size_append will make the xz tool think that
473 # the file is corrupt. This is expected.
474 #
475 # xzmisc doesn't use size_append, so it can be used to create normal .xz
476 # files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
477 # big dictionary would increase the memory usage too much in the multi-call
478 # decompression mode. A BCJ filter isn't used either.
479 quiet_cmd_xzkern = XZKERN  $@
480 cmd_xzkern = (cat $(filter-out FORCE,$^) | \
481 	sh $(srctree)/scripts/xz_wrap.sh && \
482 	$(call size_append, $(filter-out FORCE,$^))) > $@ || \
483 	(rm -f $@ ; false)
484 
485 quiet_cmd_xzmisc = XZMISC  $@
486 cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
487 	xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
488 	(rm -f $@ ; false)
489 
490 # Additional commands for U-Boot
491 #
492 # mkimage
493 # ---------------------------------------------------------------------------
494 MKIMAGEOUTPUT ?= /dev/null
495 quiet_cmd_mkimage = MKIMAGE $@
496 cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
497 	$(if $(KBUILD_VERBOSE:1=), >$(MKIMAGEOUTPUT))
498