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Commit | Line | Data |
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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) | |
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 | ||
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 | ||
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 | ||
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 | |
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)) | |
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 | |
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: It's possible that one object gets potentially linked into more | |
97 | # than one module. In that case KBUILD_MODNAME will be set to foo_bar, | |
98 | # where foo and bar are the name of the modules. | |
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)) |
720097d8 | 107 | _a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \ |
d8672b40 | 108 | $(asflags-y) $(AFLAGS_$(basetarget).o) |
f77bf014 | 109 | _cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F)) |
1da177e4 | 110 | |
2521f2c2 PO |
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 | $(CFLAGS_GCOV)) | |
120 | endif | |
121 | ||
9e1b9b80 | 122 | ifdef CONFIG_SYMBOL_PREFIX |
d63f6d1b MF |
123 | _sym_flags = -DSYMBOL_PREFIX=$(patsubst "%",%,$(CONFIG_SYMBOL_PREFIX)) |
124 | _cpp_flags += $(_sym_flags) | |
125 | _a_flags += $(_sym_flags) | |
9e1b9b80 AJ |
126 | endif |
127 | ||
128 | ||
1da177e4 LT |
129 | # If building the kernel in a separate objtree expand all occurrences |
130 | # of -Idir to -I$(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 = $(_cpp_flags) | |
136 | else | |
137 | ||
1da177e4 LT |
138 | # -I$(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 = $(call flags,_cpp_flags) | |
145 | endif | |
146 | ||
d8672b40 SR |
147 | c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
148 | $(__c_flags) $(modkern_cflags) \ | |
52159d98 | 149 | -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) |
1da177e4 | 150 | |
d8672b40 | 151 | a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
1da177e4 LT |
152 | $(__a_flags) $(modkern_aflags) |
153 | ||
d8672b40 SR |
154 | cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
155 | $(__cpp_flags) | |
1da177e4 | 156 | |
f77bf014 | 157 | ld_flags = $(LDFLAGS) $(ldflags-y) |
1da177e4 LT |
158 | |
159 | # Finds the multi-part object the current object will be linked into | |
160 | modname-multi = $(sort $(foreach m,$(multi-used),\ | |
161 | $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=)))) | |
162 | ||
163 | # Shipped files | |
164 | # =========================================================================== | |
165 | ||
166 | quiet_cmd_shipped = SHIPPED $@ | |
167 | cmd_shipped = cat $< > $@ | |
168 | ||
169 | $(obj)/%:: $(src)/%_shipped | |
170 | $(call cmd,shipped) | |
171 | ||
172 | # Commands useful for building a boot image | |
173 | # =========================================================================== | |
174 | # | |
175 | # Use as following: | |
176 | # | |
177 | # target: source(s) FORCE | |
178 | # $(if_changed,ld/objcopy/gzip) | |
179 | # | |
836caba7 | 180 | # and add target to extra-y so that we know we have to |
1da177e4 LT |
181 | # read in the saved command line |
182 | ||
183 | # Linking | |
184 | # --------------------------------------------------------------------------- | |
185 | ||
186 | quiet_cmd_ld = LD $@ | |
f77bf014 | 187 | cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \ |
1da177e4 LT |
188 | $(filter-out FORCE,$^) -o $@ |
189 | ||
190 | # Objcopy | |
191 | # --------------------------------------------------------------------------- | |
192 | ||
193 | quiet_cmd_objcopy = OBJCOPY $@ | |
194 | cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ | |
195 | ||
196 | # Gzip | |
197 | # --------------------------------------------------------------------------- | |
198 | ||
199 | quiet_cmd_gzip = GZIP $@ | |
6ae9ecb8 | 200 | cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \ |
d3dd3b5a | 201 | (rm -f $@ ; false) |
1da177e4 | 202 | |
aab94339 DB |
203 | # DTC |
204 | # --------------------------------------------------------------------------- | |
205 | ||
206 | # Generate an assembly file to wrap the output of the device tree compiler | |
207 | quiet_cmd_dt_S_dtb= DTB $@ | |
208 | cmd_dt_S_dtb= \ | |
209 | ( \ | |
210 | echo '\#include <asm-generic/vmlinux.lds.h>'; \ | |
211 | echo '.section .dtb.init.rodata,"a"'; \ | |
212 | echo '.balign STRUCT_ALIGNMENT'; \ | |
213 | echo '.global __dtb_$(*F)_begin'; \ | |
214 | echo '__dtb_$(*F)_begin:'; \ | |
215 | echo '.incbin "$<" '; \ | |
216 | echo '__dtb_$(*F)_end:'; \ | |
217 | echo '.global __dtb_$(*F)_end'; \ | |
218 | echo '.balign STRUCT_ALIGNMENT'; \ | |
219 | ) > $@ | |
220 | ||
221 | $(obj)/%.dtb.S: $(obj)/%.dtb | |
222 | $(call cmd,dt_S_dtb) | |
223 | ||
224 | quiet_cmd_dtc = DTC $@ | |
225 | cmd_dtc = $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) $< | |
1da177e4 | 226 | |
bc22c17e AK |
227 | # Bzip2 |
228 | # --------------------------------------------------------------------------- | |
229 | ||
d3dd3b5a PA |
230 | # Bzip2 and LZMA do not include size in file... so we have to fake that; |
231 | # append the size as a 32-bit littleendian number as gzip does. | |
4a2ff67c | 232 | size_append = printf $(shell \ |
d3dd3b5a PA |
233 | dec_size=0; \ |
234 | for F in $1; do \ | |
235 | fsize=$$(stat -c "%s" $$F); \ | |
236 | dec_size=$$(expr $$dec_size + $$fsize); \ | |
237 | done; \ | |
1373411a JN |
238 | printf "%08x\n" $$dec_size | \ |
239 | sed 's/\(..\)/\1 /g' | { \ | |
240 | read ch0 ch1 ch2 ch3; \ | |
241 | for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \ | |
242 | printf '%s%03o' '\\' $$((0x$$ch)); \ | |
243 | done; \ | |
244 | } \ | |
d3dd3b5a PA |
245 | ) |
246 | ||
247 | quiet_cmd_bzip2 = BZIP2 $@ | |
248 | cmd_bzip2 = (cat $(filter-out FORCE,$^) | \ | |
249 | bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ | |
250 | (rm -f $@ ; false) | |
bc22c17e AK |
251 | |
252 | # Lzma | |
253 | # --------------------------------------------------------------------------- | |
254 | ||
255 | quiet_cmd_lzma = LZMA $@ | |
d3dd3b5a PA |
256 | cmd_lzma = (cat $(filter-out FORCE,$^) | \ |
257 | lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ | |
258 | (rm -f $@ ; false) | |
7dd65feb | 259 | |
2d74b2c6 | 260 | quiet_cmd_lzo = LZO $@ |
7dd65feb AT |
261 | cmd_lzo = (cat $(filter-out FORCE,$^) | \ |
262 | lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ | |
263 | (rm -f $@ ; false) | |
d61931d8 | 264 | |
24fa0402 LC |
265 | # XZ |
266 | # --------------------------------------------------------------------------- | |
267 | # Use xzkern to compress the kernel image and xzmisc to compress other things. | |
268 | # | |
269 | # xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage | |
270 | # of the kernel decompressor. A BCJ filter is used if it is available for | |
271 | # the target architecture. xzkern also appends uncompressed size of the data | |
272 | # using size_append. The .xz format has the size information available at | |
273 | # the end of the file too, but it's in more complex format and it's good to | |
274 | # avoid changing the part of the boot code that reads the uncompressed size. | |
275 | # Note that the bytes added by size_append will make the xz tool think that | |
276 | # the file is corrupt. This is expected. | |
277 | # | |
278 | # xzmisc doesn't use size_append, so it can be used to create normal .xz | |
279 | # files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very | |
280 | # big dictionary would increase the memory usage too much in the multi-call | |
281 | # decompression mode. A BCJ filter isn't used either. | |
282 | quiet_cmd_xzkern = XZKERN $@ | |
283 | cmd_xzkern = (cat $(filter-out FORCE,$^) | \ | |
284 | sh $(srctree)/scripts/xz_wrap.sh && \ | |
285 | $(call size_append, $(filter-out FORCE,$^))) > $@ || \ | |
286 | (rm -f $@ ; false) | |
287 | ||
288 | quiet_cmd_xzmisc = XZMISC $@ | |
289 | cmd_xzmisc = (cat $(filter-out FORCE,$^) | \ | |
290 | xz --check=crc32 --lzma2=dict=1MiB) > $@ || \ | |
291 | (rm -f $@ ; false) | |
292 | ||
d61931d8 BP |
293 | # misc stuff |
294 | # --------------------------------------------------------------------------- | |
295 | quote:=" |