blob: 00c368c6e996fb0555f8161b6d3147c554d037e5 [file] [log] [blame]
Sam Ravnborgf77bf012007-10-15 22:25:06 +02001# Backward compatibility
2asflags-y += $(EXTRA_AFLAGS)
3ccflags-y += $(EXTRA_CFLAGS)
4cppflags-y += $(EXTRA_CPPFLAGS)
5ldflags-y += $(EXTRA_LDFLAGS)
6
Sam Ravnborg720097d2009-04-19 11:04:26 +02007#
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070012# 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)
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
Tejun Heo551559e2007-12-07 21:04:30 +090033# 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070038__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
49# if $(foo-objs) exists, foo.o is a composite object
50multi-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
Sam Ravnborgf5fb9762007-09-15 08:55:39 +020061# $(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))
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65# $(obj-dirs) is a list of directories that contain object files
66obj-dirs := $(dir $(multi-objs) $(subdir-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))
Tejun Heo551559e2007-12-07 21:04:30 +090077modorder := $(addprefix $(obj)/,$(modorder))
Linus Torvalds1da177e2005-04-16 15:20:36 -070078obj-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
Linus Torvalds1da177e2005-04-16 15:20:36 -070092# 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)
Michal Marek5bb05712012-01-08 21:54:43 +010096# 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.
Ustyugov Romanf83b5e32005-09-23 08:42:11 +040099name-fix = $(subst $(comma),_,$(subst -,_,$1))
Sam Ravnborg5e8d7802006-07-01 09:58:02 +0200100basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))"
Ustyugov Romanf83b5e32005-09-23 08:42:11 +0400101modname_flags = $(if $(filter 1,$(words $(modname))),\
102 -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))")
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Sam Ravnborg720097d2009-04-19 11:04:26 +0200104orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100105 $(ccflags-y) $(CFLAGS_$(basetarget).o)
Steven Rostedt656ee822008-05-14 21:30:29 -0400106_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
Sam Ravnborg720097d2009-04-19 11:04:26 +0200107_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100108 $(asflags-y) $(AFLAGS_$(basetarget).o)
Sam Ravnborgf77bf012007-10-15 22:25:06 +0200109_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700111#
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#
116ifeq ($(CONFIG_GCOV_KERNEL),y)
117_c_flags += $(if $(patsubst n%,, \
118 $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
119 $(CFLAGS_GCOV))
120endif
121
Alan Jenkins9e1b9b82009-11-07 21:03:54 +0000122ifdef CONFIG_SYMBOL_PREFIX
Mike Frysingerd63f6d12010-10-19 16:11:53 -0400123_sym_flags = -DSYMBOL_PREFIX=$(patsubst "%",%,$(CONFIG_SYMBOL_PREFIX))
124_cpp_flags += $(_sym_flags)
125_a_flags += $(_sym_flags)
Alan Jenkins9e1b9b82009-11-07 21:03:54 +0000126endif
127
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129# If building the kernel in a separate objtree expand all occurrences
130# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
131
132ifeq ($(KBUILD_SRC),)
133__c_flags = $(_c_flags)
134__a_flags = $(_a_flags)
135__cpp_flags = $(_cpp_flags)
136else
137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138# -I$(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 = $(call flags,_cpp_flags)
145endif
146
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100147c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
148 $(__c_flags) $(modkern_cflags) \
Jason Baron52159d92010-09-17 11:09:17 -0400149 -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100151a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 $(__a_flags) $(modkern_aflags)
153
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100154cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
155 $(__cpp_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Sam Ravnborgf77bf012007-10-15 22:25:06 +0200157ld_flags = $(LDFLAGS) $(ldflags-y)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159# Finds the multi-part object the current object will be linked into
160modname-multi = $(sort $(foreach m,$(multi-used),\
161 $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
162
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400163ifdef REGENERATE_PARSERS
164
165# GPERF
166# ---------------------------------------------------------------------------
167quiet_cmd_gperf = GPERF $@
168 cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $<
169
Peter Foley58238c82011-07-31 14:45:40 -0400170.PRECIOUS: $(src)/%.hash.c_shipped
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400171$(src)/%.hash.c_shipped: $(src)/%.gperf
172 $(call cmd,gperf)
173
174# LEX
175# ---------------------------------------------------------------------------
176LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
177
178quiet_cmd_flex = LEX $@
179 cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<
180
Peter Foley58238c82011-07-31 14:45:40 -0400181.PRECIOUS: $(src)/%.lex.c_shipped
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400182$(src)/%.lex.c_shipped: $(src)/%.l
183 $(call cmd,flex)
184
185# YACC
186# ---------------------------------------------------------------------------
187YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)
188
189quiet_cmd_bison = YACC $@
190 cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<
191
Peter Foley58238c82011-07-31 14:45:40 -0400192.PRECIOUS: $(src)/%.tab.c_shipped
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400193$(src)/%.tab.c_shipped: $(src)/%.y
194 $(call cmd,bison)
195
196quiet_cmd_bison_h = YACC $@
197 cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<
198
Peter Foley58238c82011-07-31 14:45:40 -0400199.PRECIOUS: $(src)/%.tab.h_shipped
Arnaud Lacombe7373f4f2011-05-23 00:04:43 -0400200$(src)/%.tab.h_shipped: $(src)/%.y
201 $(call cmd,bison_h)
202
203endif
204
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205# Shipped files
206# ===========================================================================
207
208quiet_cmd_shipped = SHIPPED $@
209cmd_shipped = cat $< > $@
210
Arnaud Lacombe991d76c2011-06-07 13:09:28 -0400211$(obj)/%: $(src)/%_shipped
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 $(call cmd,shipped)
213
214# Commands useful for building a boot image
215# ===========================================================================
216#
217# Use as following:
218#
219# target: source(s) FORCE
220# $(if_changed,ld/objcopy/gzip)
221#
Sam Ravnborg836caba2007-09-30 20:34:36 +0200222# and add target to extra-y so that we know we have to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223# read in the saved command line
224
225# Linking
226# ---------------------------------------------------------------------------
227
228quiet_cmd_ld = LD $@
Sam Ravnborgf77bf012007-10-15 22:25:06 +0200229cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 $(filter-out FORCE,$^) -o $@
231
232# Objcopy
233# ---------------------------------------------------------------------------
234
235quiet_cmd_objcopy = OBJCOPY $@
236cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
237
238# Gzip
239# ---------------------------------------------------------------------------
240
241quiet_cmd_gzip = GZIP $@
Michal Marek6ae9ecb2011-03-31 15:47:55 +0200242cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700243 (rm -f $@ ; false)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
Dirk Brandewieaab94332010-12-22 11:57:26 -0800245# DTC
246# ---------------------------------------------------------------------------
247
248# Generate an assembly file to wrap the output of the device tree compiler
249quiet_cmd_dt_S_dtb= DTB $@
250cmd_dt_S_dtb= \
251( \
252 echo '\#include <asm-generic/vmlinux.lds.h>'; \
253 echo '.section .dtb.init.rodata,"a"'; \
254 echo '.balign STRUCT_ALIGNMENT'; \
255 echo '.global __dtb_$(*F)_begin'; \
256 echo '__dtb_$(*F)_begin:'; \
257 echo '.incbin "$<" '; \
258 echo '__dtb_$(*F)_end:'; \
259 echo '.global __dtb_$(*F)_end'; \
260 echo '.balign STRUCT_ALIGNMENT'; \
261) > $@
262
263$(obj)/%.dtb.S: $(obj)/%.dtb
264 $(call cmd,dt_S_dtb)
265
266quiet_cmd_dtc = DTC $@
Stephen Warren7c431852012-01-09 11:38:15 -0700267cmd_dtc = $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) -d $(depfile) $<
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
Alain Knaffbc22c172009-01-04 22:46:16 +0100269# Bzip2
270# ---------------------------------------------------------------------------
271
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700272# Bzip2 and LZMA do not include size in file... so we have to fake that;
273# append the size as a 32-bit littleendian number as gzip does.
Michael Tokarev4a2ff672009-10-13 22:22:46 +0200274size_append = printf $(shell \
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700275dec_size=0; \
276for F in $1; do \
277 fsize=$$(stat -c "%s" $$F); \
278 dec_size=$$(expr $$dec_size + $$fsize); \
279done; \
Jonathan Nieder13734112009-12-28 19:38:27 +0000280printf "%08x\n" $$dec_size | \
281 sed 's/\(..\)/\1 /g' | { \
282 read ch0 ch1 ch2 ch3; \
283 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \
284 printf '%s%03o' '\\' $$((0x$$ch)); \
285 done; \
286 } \
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700287)
Alain Knaffbc22c172009-01-04 22:46:16 +0100288
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700289quiet_cmd_bzip2 = BZIP2 $@
290cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
291 bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
292 (rm -f $@ ; false)
Alain Knaffbc22c172009-01-04 22:46:16 +0100293
294# Lzma
295# ---------------------------------------------------------------------------
296
297quiet_cmd_lzma = LZMA $@
H. Peter Anvind3dd3b52009-05-05 21:17:15 -0700298cmd_lzma = (cat $(filter-out FORCE,$^) | \
299 lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
300 (rm -f $@ ; false)
Albin Tonnerre7dd65fe2010-01-08 14:42:42 -0800301
Wu Zhangjin2d74b2c2010-03-11 17:42:14 +0800302quiet_cmd_lzo = LZO $@
Albin Tonnerre7dd65fe2010-01-08 14:42:42 -0800303cmd_lzo = (cat $(filter-out FORCE,$^) | \
304 lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
305 (rm -f $@ ; false)
Borislav Petkovd61931d2010-03-05 17:34:46 +0100306
Lasse Collin24fa0402011-01-12 17:01:22 -0800307# XZ
308# ---------------------------------------------------------------------------
309# Use xzkern to compress the kernel image and xzmisc to compress other things.
310#
311# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
312# of the kernel decompressor. A BCJ filter is used if it is available for
313# the target architecture. xzkern also appends uncompressed size of the data
314# using size_append. The .xz format has the size information available at
315# the end of the file too, but it's in more complex format and it's good to
316# avoid changing the part of the boot code that reads the uncompressed size.
317# Note that the bytes added by size_append will make the xz tool think that
318# the file is corrupt. This is expected.
319#
320# xzmisc doesn't use size_append, so it can be used to create normal .xz
321# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
322# big dictionary would increase the memory usage too much in the multi-call
323# decompression mode. A BCJ filter isn't used either.
324quiet_cmd_xzkern = XZKERN $@
325cmd_xzkern = (cat $(filter-out FORCE,$^) | \
326 sh $(srctree)/scripts/xz_wrap.sh && \
327 $(call size_append, $(filter-out FORCE,$^))) > $@ || \
328 (rm -f $@ ; false)
329
330quiet_cmd_xzmisc = XZMISC $@
331cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
332 xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
333 (rm -f $@ ; false)
334
Borislav Petkovd61931d2010-03-05 17:34:46 +0100335# misc stuff
336# ---------------------------------------------------------------------------
337quote:="