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Masahiro Yamada22433fc2014-02-04 17:24:27 +09001# Backward compatibility
2asflags-y += $(EXTRA_AFLAGS)
3ccflags-y += $(EXTRA_CFLAGS)
4cppflags-y += $(EXTRA_CPPFLAGS)
5ldflags-y += $(EXTRA_LDFLAGS)
6
7#
8# flags that take effect in sub directories
9export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y)
10export 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
18obj-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
23lib-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)
Masahiro Yamada45f0ad92014-06-16 18:56:38 +090030# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
Masahiro Yamada22433fc2014-02-04 17:24:27 +090031# 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.
36modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
37
38__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
39subdir-y += $(__subdir-y)
40__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
41subdir-m += $(__subdir-m)
42obj-y := $(patsubst %/, %/built-in.o, $(obj-y))
43obj-m := $(filter-out %/, $(obj-m))
44
45# Subdirectories we need to descend into
46
47subdir-ym := $(sort $(subdir-y) $(subdir-m))
48
Masahiro Yamada45f0ad92014-06-16 18:56:38 +090049# if $(foo-objs) exists, foo.o is a composite object
Masahiro Yamada22433fc2014-02-04 17:24:27 +090050multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
51multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
52multi-used := $(multi-used-y) $(multi-used-m)
53single-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)
57multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y)))
58multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y)))
59multi-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
63subdir-obj-y := $(filter %/built-in.o, $(obj-y))
64
65# $(obj-dirs) is a list of directories that contain object files
66obj-dirs := $(dir $(multi-objs) $(obj-y))
67
68# Replace multi-part objects by their individual parts, look at local dir only
69real-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)
70real-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
74extra-y := $(addprefix $(obj)/,$(extra-y))
75always := $(addprefix $(obj)/,$(always))
76targets := $(addprefix $(obj)/,$(targets))
77modorder := $(addprefix $(obj)/,$(modorder))
78obj-y := $(addprefix $(obj)/,$(obj-y))
79obj-m := $(addprefix $(obj)/,$(obj-m))
80lib-y := $(addprefix $(obj)/,$(lib-y))
81subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
82real-objs-y := $(addprefix $(obj)/,$(real-objs-y))
83real-objs-m := $(addprefix $(obj)/,$(real-objs-m))
84single-used-m := $(addprefix $(obj)/,$(single-used-m))
85multi-used-y := $(addprefix $(obj)/,$(multi-used-y))
86multi-used-m := $(addprefix $(obj)/,$(multi-used-m))
87multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y))
88multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
89subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
90obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
91
92# These flags are needed for modversions and compiling, so we define them here
93# already
Masahiro Yamada45f0ad92014-06-16 18:56:38 +090094# $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
Masahiro Yamada22433fc2014-02-04 17:24:27 +090095# 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.
99name-fix = $(subst $(comma),_,$(subst -,_,$1))
100basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))"
101modname_flags = $(if $(filter 1,$(words $(modname))),\
102 -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))")
103
Masahiro Yamada026f9cf2014-03-05 16:59:40 +0900104orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900105 $(ccflags-y) $(CFLAGS_$(basetarget).o)
106_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
Simon Glass3834f412015-07-31 09:31:18 -0600107orig_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900108 $(asflags-y) $(AFLAGS_$(basetarget).o)
Simon Glass3834f412015-07-31 09:31:18 -0600109_a_flags = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags))
Masahiro Yamada026f9cf2014-03-05 16:59:40 +0900110_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900111
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#
117ifeq ($(CONFIG_GCOV_KERNEL),y)
118_c_flags += $(if $(patsubst n%,, \
119 $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
120 $(CFLAGS_GCOV))
121endif
122
Masahiro Yamada98bd0e02015-07-05 01:56:55 +0900123#
124# Enable address sanitizer flags for kernel except some files or directories
125# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
126#
127ifeq ($(CONFIG_KASAN),y)
128_c_flags += $(if $(patsubst n%,, \
129 $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
130 $(CFLAGS_KASAN))
131endif
132
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900133# If building the kernel in a separate objtree expand all occurrences
134# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
135
136ifeq ($(KBUILD_SRC),)
137__c_flags = $(_c_flags)
138__a_flags = $(_a_flags)
139__cpp_flags = $(_cpp_flags)
140else
141
142# -I$(obj) locates generated .h files
143# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
144# and locates generated .h files
145# FIXME: Replace both with specific CFLAGS* statements in the makefiles
146__c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags)
147__a_flags = $(call flags,_a_flags)
148__cpp_flags = $(call flags,_cpp_flags)
149endif
150
Masahiro Yamada6825a952014-02-04 17:24:28 +0900151# Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE
152c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900153 $(__c_flags) $(modkern_cflags) \
154 -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags)
155
Masahiro Yamada6825a952014-02-04 17:24:28 +0900156a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900157 $(__a_flags) $(modkern_aflags)
158
Masahiro Yamada6825a952014-02-04 17:24:28 +0900159cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900160 $(__cpp_flags)
161
162ld_flags = $(LDFLAGS) $(ldflags-y)
163
Masahiro Yamada6ab6b2a2014-02-05 11:28:25 +0900164# Modified for U-Boot
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900165dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
Masahiro Yamada6ab6b2a2014-02-05 11:28:25 +0900166 -I$(srctree)/arch/$(ARCH)/dts \
Simon Glass5957ac22014-06-11 23:29:44 -0600167 -I$(srctree)/arch/$(ARCH)/dts/include \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900168 -undef -D__DTS__
169
170# Finds the multi-part object the current object will be linked into
171modname-multi = $(sort $(foreach m,$(multi-used),\
172 $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
173
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900174# Useful for describing the dependency of composite objects
175# Usage:
176# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
177define multi_depend
178$(foreach m, $(notdir $1), \
179 $(eval $(obj)/$m: \
180 $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
181endef
182
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900183ifdef REGENERATE_PARSERS
184
185# GPERF
186# ---------------------------------------------------------------------------
187quiet_cmd_gperf = GPERF $@
188 cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $<
189
190.PRECIOUS: $(src)/%.hash.c_shipped
191$(src)/%.hash.c_shipped: $(src)/%.gperf
192 $(call cmd,gperf)
193
194# LEX
195# ---------------------------------------------------------------------------
196LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
197
198quiet_cmd_flex = LEX $@
199 cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<
200
201.PRECIOUS: $(src)/%.lex.c_shipped
202$(src)/%.lex.c_shipped: $(src)/%.l
203 $(call cmd,flex)
204
205# YACC
206# ---------------------------------------------------------------------------
207YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)
208
209quiet_cmd_bison = YACC $@
210 cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<
211
212.PRECIOUS: $(src)/%.tab.c_shipped
213$(src)/%.tab.c_shipped: $(src)/%.y
214 $(call cmd,bison)
215
216quiet_cmd_bison_h = YACC $@
217 cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<
218
219.PRECIOUS: $(src)/%.tab.h_shipped
220$(src)/%.tab.h_shipped: $(src)/%.y
221 $(call cmd,bison_h)
222
223endif
224
225# Shipped files
226# ===========================================================================
227
228quiet_cmd_shipped = SHIPPED $@
229cmd_shipped = cat $< > $@
230
231$(obj)/%: $(src)/%_shipped
232 $(call cmd,shipped)
233
234# Commands useful for building a boot image
235# ===========================================================================
Masahiro Yamada45f0ad92014-06-16 18:56:38 +0900236#
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900237# Use as following:
238#
239# target: source(s) FORCE
240# $(if_changed,ld/objcopy/gzip)
241#
242# and add target to extra-y so that we know we have to
243# read in the saved command line
244
245# Linking
246# ---------------------------------------------------------------------------
247
248quiet_cmd_ld = LD $@
249cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
Masahiro Yamada45f0ad92014-06-16 18:56:38 +0900250 $(filter-out FORCE,$^) -o $@
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900251
252# Objcopy
253# ---------------------------------------------------------------------------
254
255quiet_cmd_objcopy = OBJCOPY $@
256cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
257
258# Gzip
259# ---------------------------------------------------------------------------
260
261quiet_cmd_gzip = GZIP $@
262cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
263 (rm -f $@ ; false)
264
265# DTC
266# ---------------------------------------------------------------------------
267
268# Generate an assembly file to wrap the output of the device tree compiler
269quiet_cmd_dt_S_dtb= DTB $@
Masahiro Yamada6ab6b2a2014-02-05 11:28:25 +0900270# Modified for U-Boot
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900271cmd_dt_S_dtb= \
272( \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900273 echo '.section .dtb.init.rodata,"a"'; \
Simon Glass5c30bf42014-11-14 18:18:19 -0700274 echo '.balign 16'; \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900275 echo '.global __dtb_$(*F)_begin'; \
276 echo '__dtb_$(*F)_begin:'; \
277 echo '.incbin "$<" '; \
278 echo '__dtb_$(*F)_end:'; \
279 echo '.global __dtb_$(*F)_end'; \
Simon Glass5c30bf42014-11-14 18:18:19 -0700280 echo '.balign 16'; \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900281) > $@
282
283$(obj)/%.dtb.S: $(obj)/%.dtb
284 $(call cmd,dt_S_dtb)
285
286quiet_cmd_dtc = DTC $@
Masahiro Yamada6ab6b2a2014-02-05 11:28:25 +0900287# Modified for U-Boot
Masahiro Yamada98bd0e02015-07-05 01:56:55 +0900288cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
289 $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
Pavel Machekc4aaf2e2015-04-06 15:46:44 +0200290 $(DTC) -O dtb -o $@ -b 0 \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900291 -i $(dir $<) $(DTC_FLAGS) \
292 -d $(depfile).dtc.tmp $(dtc-tmp) ; \
293 cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
294
295$(obj)/%.dtb: $(src)/%.dts FORCE
296 $(call if_changed_dep,dtc)
297
298dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
299
Saket Sinha867bcb62015-08-22 12:20:55 +0530300# ACPI
301# ---------------------------------------------------------------------------
302quiet_cmd_acpi_c_asl= ASL $@
303cmd_acpi_c_asl= \
304 $(CPP) -x assembler-with-cpp -P -o $<.tmp $<; \
305 iasl -p $< -tc -va $<.tmp; \
306 mv $(patsubst %.asl,%.hex,$<) $@
307
308$(obj)/%.c: $(src)/%.asl
309 $(call cmd,acpi_c_asl)
310
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900311# Bzip2
312# ---------------------------------------------------------------------------
313
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.
316size_append = printf $(shell \
317dec_size=0; \
318for F in $1; do \
319 fsize=$$(stat -c "%s" $$F); \
320 dec_size=$$(expr $$dec_size + $$fsize); \
321done; \
322printf "%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 } \
329)
330
331quiet_cmd_bzip2 = BZIP2 $@
332cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
333 bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
334 (rm -f $@ ; false)
335
336# Lzma
337# ---------------------------------------------------------------------------
338
339quiet_cmd_lzma = LZMA $@
340cmd_lzma = (cat $(filter-out FORCE,$^) | \
341 lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
342 (rm -f $@ ; false)
343
344quiet_cmd_lzo = LZO $@
345cmd_lzo = (cat $(filter-out FORCE,$^) | \
346 lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
347 (rm -f $@ ; false)
348
349quiet_cmd_lz4 = LZ4 $@
350cmd_lz4 = (cat $(filter-out FORCE,$^) | \
351 lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
352 (rm -f $@ ; false)
353
354# U-Boot mkimage
355# ---------------------------------------------------------------------------
356
357MKIMAGE := $(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
361UIMAGE_ARCH ?= $(SRCARCH)
362UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
363UIMAGE_OPTS-y ?=
364UIMAGE_TYPE ?= kernel
365UIMAGE_LOADADDR ?= arch_must_set_this
366UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
367UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
368UIMAGE_IN ?= $<
369UIMAGE_OUT ?= $@
370
371quiet_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
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.
395quiet_cmd_xzkern = XZKERN $@
396cmd_xzkern = (cat $(filter-out FORCE,$^) | \
397 sh $(srctree)/scripts/xz_wrap.sh && \
398 $(call size_append, $(filter-out FORCE,$^))) > $@ || \
399 (rm -f $@ ; false)
400
401quiet_cmd_xzmisc = XZMISC $@
402cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
403 xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
404 (rm -f $@ ; false)
Masahiro Yamadaba8dd772014-06-04 10:12:21 +0900405
406# Additional commands for U-Boot
407#
408# mkimage
409# ---------------------------------------------------------------------------
410quiet_cmd_mkimage = MKIMAGE $@
411cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
412 $(if $(KBUILD_VERBOSE:1=), >/dev/null)