Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/scripts/Makefile.lib

  1 # Backward compatibility
  2 asflags-y  += $(EXTRA_AFLAGS)
  3 ccflags-y  += $(EXTRA_CFLAGS)
  4 cppflags-y += $(EXTRA_CPPFLAGS)
  5 ldflags-y  += $(EXTRA_LDFLAGS)
  6 
  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 
 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 
 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 
 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:.o=-m))), $(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 
 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))
 64 
 65 # $(obj-dirs) is a list of directories that contain object files
 66 obj-dirs := $(dir $(multi-objs) $(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=-m))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
 71 
 72 # Add subdir path
 73 
 74 extra-y         := $(addprefix $(obj)/,$(extra-y))
 75 always          := $(addprefix $(obj)/,$(always))
 76 targets         := $(addprefix $(obj)/,$(targets))
 77 modorder        := $(addprefix $(obj)/,$(modorder))
 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 
 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: 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.
 99 name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote)
100 basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
101 modname_flags  = $(if $(filter 1,$(words $(modname))),\
102                  -DKBUILD_MODNAME=$(call name-fix,$(modname)))
103 
104 orig_c_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
105                  $(ccflags-y) $(CFLAGS_$(basetarget).o)
106 _c_flags       = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
107 orig_a_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
108                  $(asflags-y) $(AFLAGS_$(basetarget).o)
109 _a_flags       = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags))
110 _cpp_flags     = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
111 
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                 $(CFLAGS_GCOV))
121 endif
122 
123 #
124 # Enable address sanitizer flags for kernel except some files or directories
125 # we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
126 #
127 ifeq ($(CONFIG_KASAN),y)
128 _c_flags += $(if $(patsubst n%,, \
129                 $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
130                 $(CFLAGS_KASAN))
131 endif
132 
133 ifeq ($(CONFIG_UBSAN),y)
134 _c_flags += $(if $(patsubst n%,, \
135                 $(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \
136                 $(CFLAGS_UBSAN))
137 endif
138 
139 ifeq ($(CONFIG_KCOV),y)
140 _c_flags += $(if $(patsubst n%,, \
141         $(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)$(CONFIG_KCOV_INSTRUMENT_ALL)), \
142         $(CFLAGS_KCOV))
143 endif
144 
145 # If building the kernel in a separate objtree expand all occurrences
146 # of -Idir to -I$(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     = $(_cpp_flags)
152 else
153 
154 # -I$(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       = $(if $(obj),-I$(srctree)/$(src) -I$(obj)) \
159                   $(call flags,_c_flags)
160 __a_flags       = $(call flags,_a_flags)
161 __cpp_flags     = $(call flags,_cpp_flags)
162 endif
163 
164 c_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
165                  $(__c_flags) $(modkern_cflags)                           \
166                  $(basename_flags) $(modname_flags)
167 
168 a_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
169                  $(__a_flags) $(modkern_aflags)
170 
171 cpp_flags      = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
172                  $(__cpp_flags)
173 
174 ld_flags       = $(LDFLAGS) $(ldflags-y)
175 
176 dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
177                  -I$(srctree)/arch/$(SRCARCH)/boot/dts                   \
178                  -I$(srctree)/arch/$(SRCARCH)/boot/dts/include           \
179                  -I$(srctree)/drivers/of/testcase-data                   \
180                  -undef -D__DTS__
181 
182 # Finds the multi-part object the current object will be linked into
183 modname-multi = $(sort $(foreach m,$(multi-used),\
184                 $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
185 
186 # Useful for describing the dependency of composite objects
187 # Usage:
188 #   $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
189 define multi_depend
190 $(foreach m, $(notdir $1), \
191         $(eval $(obj)/$m: \
192         $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
193 endef
194 
195 ifdef REGENERATE_PARSERS
196 
197 # GPERF
198 # ---------------------------------------------------------------------------
199 quiet_cmd_gperf = GPERF $@
200       cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $<
201 
202 .PRECIOUS: $(src)/%.hash.c_shipped
203 $(src)/%.hash.c_shipped: $(src)/%.gperf
204         $(call cmd,gperf)
205 
206 # LEX
207 # ---------------------------------------------------------------------------
208 LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
209 
210 quiet_cmd_flex = LEX     $@
211       cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<
212 
213 .PRECIOUS: $(src)/%.lex.c_shipped
214 $(src)/%.lex.c_shipped: $(src)/%.l
215         $(call cmd,flex)
216 
217 # YACC
218 # ---------------------------------------------------------------------------
219 YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)
220 
221 quiet_cmd_bison = YACC    $@
222       cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<
223 
224 .PRECIOUS: $(src)/%.tab.c_shipped
225 $(src)/%.tab.c_shipped: $(src)/%.y
226         $(call cmd,bison)
227 
228 quiet_cmd_bison_h = YACC    $@
229       cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<
230 
231 .PRECIOUS: $(src)/%.tab.h_shipped
232 $(src)/%.tab.h_shipped: $(src)/%.y
233         $(call cmd,bison_h)
234 
235 endif
236 
237 # Shipped files
238 # ===========================================================================
239 
240 quiet_cmd_shipped = SHIPPED $@
241 cmd_shipped = cat $< > $@
242 
243 $(obj)/%: $(src)/%_shipped
244         $(call cmd,shipped)
245 
246 # Commands useful for building a boot image
247 # ===========================================================================
248 #
249 #       Use as following:
250 #
251 #       target: source(s) FORCE
252 #               $(if_changed,ld/objcopy/gzip)
253 #
254 #       and add target to extra-y so that we know we have to
255 #       read in the saved command line
256 
257 # Linking
258 # ---------------------------------------------------------------------------
259 
260 quiet_cmd_ld = LD      $@
261 cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
262                $(filter-out FORCE,$^) -o $@
263 
264 # Objcopy
265 # ---------------------------------------------------------------------------
266 
267 quiet_cmd_objcopy = OBJCOPY $@
268 cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
269 
270 # Gzip
271 # ---------------------------------------------------------------------------
272 
273 quiet_cmd_gzip = GZIP    $@
274 cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
275         (rm -f $@ ; false)
276 
277 # DTC
278 # ---------------------------------------------------------------------------
279 DTC ?= $(objtree)/scripts/dtc/dtc
280 
281 # Disable noisy checks by default
282 ifeq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
283 DTC_FLAGS += -Wno-unit_address_vs_reg
284 endif
285 
286 # Generate an assembly file to wrap the output of the device tree compiler
287 quiet_cmd_dt_S_dtb= DTB     $@
288 cmd_dt_S_dtb=                                           \
289 (                                                       \
290         echo '\#include <asm-generic/vmlinux.lds.h>';   \
291         echo '.section .dtb.init.rodata,"a"';           \
292         echo '.balign STRUCT_ALIGNMENT';                \
293         echo '.global __dtb_$(*F)_begin';               \
294         echo '__dtb_$(*F)_begin:';                      \
295         echo '.incbin "$<" ';                           \
296         echo '__dtb_$(*F)_end:';                        \
297         echo '.global __dtb_$(*F)_end';                 \
298         echo '.balign STRUCT_ALIGNMENT';                \
299 ) > $@
300 
301 $(obj)/%.dtb.S: $(obj)/%.dtb
302         $(call cmd,dt_S_dtb)
303 
304 quiet_cmd_dtc = DTC     $@
305 cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
306         $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
307         $(DTC) -O dtb -o $@ -b 0 \
308                 -i $(dir $<) $(DTC_FLAGS) \
309                 -d $(depfile).dtc.tmp $(dtc-tmp) ; \
310         cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
311 
312 $(obj)/%.dtb: $(src)/%.dts FORCE
313         $(call if_changed_dep,dtc)
314 
315 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
316 
317 # Bzip2
318 # ---------------------------------------------------------------------------
319 
320 # Bzip2 and LZMA do not include size in file... so we have to fake that;
321 # append the size as a 32-bit littleendian number as gzip does.
322 size_append = printf $(shell                                            \
323 dec_size=0;                                                             \
324 for F in $1; do                                                         \
325         fsize=$$(stat -c "%s" $$F);                                     \
326         dec_size=$$(expr $$dec_size + $$fsize);                         \
327 done;                                                                   \
328 printf "%08x\n" $$dec_size |                                            \
329         sed 's/\(..\)/\1 /g' | {                                        \
330                 read ch0 ch1 ch2 ch3;                                   \
331                 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do                   \
332                         printf '%s%03o' '\\' $$((0x$$ch));              \
333                 done;                                                   \
334         }                                                               \
335 )
336 
337 quiet_cmd_bzip2 = BZIP2   $@
338 cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
339         bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
340         (rm -f $@ ; false)
341 
342 # Lzma
343 # ---------------------------------------------------------------------------
344 
345 quiet_cmd_lzma = LZMA    $@
346 cmd_lzma = (cat $(filter-out FORCE,$^) | \
347         lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
348         (rm -f $@ ; false)
349 
350 quiet_cmd_lzo = LZO     $@
351 cmd_lzo = (cat $(filter-out FORCE,$^) | \
352         lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
353         (rm -f $@ ; false)
354 
355 quiet_cmd_lz4 = LZ4     $@
356 cmd_lz4 = (cat $(filter-out FORCE,$^) | \
357         lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
358         (rm -f $@ ; false)
359 
360 # U-Boot mkimage
361 # ---------------------------------------------------------------------------
362 
363 MKIMAGE := $(srctree)/scripts/mkuboot.sh
364 
365 # SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
366 # the number of overrides in arch makefiles
367 UIMAGE_ARCH ?= $(SRCARCH)
368 UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
369 UIMAGE_OPTS-y ?=
370 UIMAGE_TYPE ?= kernel
371 UIMAGE_LOADADDR ?= arch_must_set_this
372 UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
373 UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
374 UIMAGE_IN ?= $<
375 UIMAGE_OUT ?= $@
376 
377 quiet_cmd_uimage = UIMAGE  $(UIMAGE_OUT)
378       cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
379                         -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
380                         -T $(UIMAGE_TYPE) \
381                         -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
382                         -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT)
383 
384 # XZ
385 # ---------------------------------------------------------------------------
386 # Use xzkern to compress the kernel image and xzmisc to compress other things.
387 #
388 # xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
389 # of the kernel decompressor. A BCJ filter is used if it is available for
390 # the target architecture. xzkern also appends uncompressed size of the data
391 # using size_append. The .xz format has the size information available at
392 # the end of the file too, but it's in more complex format and it's good to
393 # avoid changing the part of the boot code that reads the uncompressed size.
394 # Note that the bytes added by size_append will make the xz tool think that
395 # the file is corrupt. This is expected.
396 #
397 # xzmisc doesn't use size_append, so it can be used to create normal .xz
398 # files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
399 # big dictionary would increase the memory usage too much in the multi-call
400 # decompression mode. A BCJ filter isn't used either.
401 quiet_cmd_xzkern = XZKERN  $@
402 cmd_xzkern = (cat $(filter-out FORCE,$^) | \
403         sh $(srctree)/scripts/xz_wrap.sh && \
404         $(call size_append, $(filter-out FORCE,$^))) > $@ || \
405         (rm -f $@ ; false)
406 
407 quiet_cmd_xzmisc = XZMISC  $@
408 cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
409         xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
410         (rm -f $@ ; false)

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us