Makefile.lib 13 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373
  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. # flags that take effect in sub directories
  8. export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y)
  9. export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(subdir-ccflags-y)
  10. # Figure out what we need to build from the various variables
  11. # ===========================================================================
  12. # When an object is listed to be built compiled-in and modular,
  13. # only build the compiled-in version
  14. obj-m := $(filter-out $(obj-y),$(obj-m))
  15. # Libraries are always collected in one lib file.
  16. # Filter out objects already built-in
  17. lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
  18. # Handle objects in subdirs
  19. # ---------------------------------------------------------------------------
  20. # o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o
  21. # and add the directory to the list of dirs to descend into: $(subdir-y)
  22. # o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
  23. # and add the directory to the list of dirs to descend into: $(subdir-m)
  24. # Determine modorder.
  25. # Unfortunately, we don't have information about ordering between -y
  26. # and -m subdirs. Just put -y's first.
  27. modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
  28. __subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
  29. subdir-y += $(__subdir-y)
  30. __subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
  31. subdir-m += $(__subdir-m)
  32. obj-y := $(patsubst %/, %/built-in.o, $(obj-y))
  33. obj-m := $(filter-out %/, $(obj-m))
  34. # Subdirectories we need to descend into
  35. subdir-ym := $(sort $(subdir-y) $(subdir-m))
  36. # if $(foo-objs) exists, foo.o is a composite object
  37. multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
  38. multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
  39. multi-used := $(multi-used-y) $(multi-used-m)
  40. single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
  41. # Build list of the parts of our composite objects, our composite
  42. # objects depend on those (obviously)
  43. multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y)))
  44. multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y)))
  45. multi-objs := $(multi-objs-y) $(multi-objs-m)
  46. # $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
  47. # tell kbuild to descend
  48. subdir-obj-y := $(filter %/built-in.o, $(obj-y))
  49. # $(obj-dirs) is a list of directories that contain object files
  50. obj-dirs := $(dir $(multi-objs) $(obj-y))
  51. # Replace multi-part objects by their individual parts, look at local dir only
  52. 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)
  53. real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
  54. # Add subdir path
  55. extra-y := $(addprefix $(obj)/,$(extra-y))
  56. always := $(addprefix $(obj)/,$(always))
  57. targets := $(addprefix $(obj)/,$(targets))
  58. modorder := $(addprefix $(obj)/,$(modorder))
  59. obj-y := $(addprefix $(obj)/,$(obj-y))
  60. obj-m := $(addprefix $(obj)/,$(obj-m))
  61. lib-y := $(addprefix $(obj)/,$(lib-y))
  62. subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
  63. real-objs-y := $(addprefix $(obj)/,$(real-objs-y))
  64. real-objs-m := $(addprefix $(obj)/,$(real-objs-m))
  65. single-used-m := $(addprefix $(obj)/,$(single-used-m))
  66. multi-used-y := $(addprefix $(obj)/,$(multi-used-y))
  67. multi-used-m := $(addprefix $(obj)/,$(multi-used-m))
  68. multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y))
  69. multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
  70. subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
  71. obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
  72. # These flags are needed for modversions and compiling, so we define them here
  73. # already
  74. # $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
  75. # end up in (or would, if it gets compiled in)
  76. # Note: Files that end up in two or more modules are compiled without the
  77. # KBUILD_MODNAME definition. The reason is that any made-up name would
  78. # differ in different configs.
  79. name-fix = $(subst $(comma),_,$(subst -,_,$1))
  80. basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))"
  81. modname_flags = $(if $(filter 1,$(words $(modname))),\
  82. -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))")
  83. orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
  84. $(ccflags-y) $(CFLAGS_$(basetarget).o)
  85. _c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
  86. _a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
  87. $(asflags-y) $(AFLAGS_$(basetarget).o)
  88. _cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
  89. #
  90. # Enable gcov profiling flags for a file, directory or for all files depending
  91. # on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
  92. # (in this order)
  93. #
  94. ifeq ($(CONFIG_GCOV_KERNEL),y)
  95. _c_flags += $(if $(patsubst n%,, \
  96. $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
  97. $(CFLAGS_GCOV))
  98. endif
  99. # If building the kernel in a separate objtree expand all occurrences
  100. # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
  101. ifeq ($(KBUILD_SRC),)
  102. __c_flags = $(_c_flags)
  103. __a_flags = $(_a_flags)
  104. __cpp_flags = $(_cpp_flags)
  105. else
  106. # -I$(obj) locates generated .h files
  107. # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
  108. # and locates generated .h files
  109. # FIXME: Replace both with specific CFLAGS* statements in the makefiles
  110. __c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags)
  111. __a_flags = $(call flags,_a_flags)
  112. __cpp_flags = $(call flags,_cpp_flags)
  113. endif
  114. # Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE
  115. c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
  116. $(__c_flags) $(modkern_cflags) \
  117. -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags)
  118. a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
  119. $(__a_flags) $(modkern_aflags)
  120. cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
  121. $(__cpp_flags)
  122. ld_flags = $(LDFLAGS) $(ldflags-y)
  123. # Modified for U-Boot
  124. dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
  125. -I$(srctree)/arch/$(ARCH)/dts \
  126. -undef -D__DTS__
  127. # Finds the multi-part object the current object will be linked into
  128. modname-multi = $(sort $(foreach m,$(multi-used),\
  129. $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
  130. ifdef REGENERATE_PARSERS
  131. # GPERF
  132. # ---------------------------------------------------------------------------
  133. quiet_cmd_gperf = GPERF $@
  134. cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $<
  135. .PRECIOUS: $(src)/%.hash.c_shipped
  136. $(src)/%.hash.c_shipped: $(src)/%.gperf
  137. $(call cmd,gperf)
  138. # LEX
  139. # ---------------------------------------------------------------------------
  140. LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
  141. quiet_cmd_flex = LEX $@
  142. cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<
  143. .PRECIOUS: $(src)/%.lex.c_shipped
  144. $(src)/%.lex.c_shipped: $(src)/%.l
  145. $(call cmd,flex)
  146. # YACC
  147. # ---------------------------------------------------------------------------
  148. YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)
  149. quiet_cmd_bison = YACC $@
  150. cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<
  151. .PRECIOUS: $(src)/%.tab.c_shipped
  152. $(src)/%.tab.c_shipped: $(src)/%.y
  153. $(call cmd,bison)
  154. quiet_cmd_bison_h = YACC $@
  155. cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<
  156. .PRECIOUS: $(src)/%.tab.h_shipped
  157. $(src)/%.tab.h_shipped: $(src)/%.y
  158. $(call cmd,bison_h)
  159. endif
  160. # Shipped files
  161. # ===========================================================================
  162. quiet_cmd_shipped = SHIPPED $@
  163. cmd_shipped = cat $< > $@
  164. $(obj)/%: $(src)/%_shipped
  165. $(call cmd,shipped)
  166. # Commands useful for building a boot image
  167. # ===========================================================================
  168. #
  169. # Use as following:
  170. #
  171. # target: source(s) FORCE
  172. # $(if_changed,ld/objcopy/gzip)
  173. #
  174. # and add target to extra-y so that we know we have to
  175. # read in the saved command line
  176. # Linking
  177. # ---------------------------------------------------------------------------
  178. quiet_cmd_ld = LD $@
  179. cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
  180. $(filter-out FORCE,$^) -o $@
  181. # Objcopy
  182. # ---------------------------------------------------------------------------
  183. quiet_cmd_objcopy = OBJCOPY $@
  184. cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
  185. # Gzip
  186. # ---------------------------------------------------------------------------
  187. quiet_cmd_gzip = GZIP $@
  188. cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
  189. (rm -f $@ ; false)
  190. # DTC
  191. # ---------------------------------------------------------------------------
  192. # Generate an assembly file to wrap the output of the device tree compiler
  193. quiet_cmd_dt_S_dtb= DTB $@
  194. # Modified for U-Boot
  195. cmd_dt_S_dtb= \
  196. ( \
  197. echo '.section .dtb.init.rodata,"a"'; \
  198. echo '.global __dtb_$(*F)_begin'; \
  199. echo '__dtb_$(*F)_begin:'; \
  200. echo '.incbin "$<" '; \
  201. echo '__dtb_$(*F)_end:'; \
  202. echo '.global __dtb_$(*F)_end'; \
  203. ) > $@
  204. $(obj)/%.dtb.S: $(obj)/%.dtb
  205. $(call cmd,dt_S_dtb)
  206. quiet_cmd_dtc = DTC $@
  207. # Modified for U-Boot
  208. cmd_dtc = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
  209. dtc -O dtb -o $@ -b 0 \
  210. -i $(dir $<) $(DTC_FLAGS) \
  211. -d $(depfile).dtc.tmp $(dtc-tmp) ; \
  212. cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
  213. $(obj)/%.dtb: $(src)/%.dts FORCE
  214. $(call if_changed_dep,dtc)
  215. dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
  216. # Bzip2
  217. # ---------------------------------------------------------------------------
  218. # Bzip2 and LZMA do not include size in file... so we have to fake that;
  219. # append the size as a 32-bit littleendian number as gzip does.
  220. size_append = printf $(shell \
  221. dec_size=0; \
  222. for F in $1; do \
  223. fsize=$$(stat -c "%s" $$F); \
  224. dec_size=$$(expr $$dec_size + $$fsize); \
  225. done; \
  226. printf "%08x\n" $$dec_size | \
  227. sed 's/\(..\)/\1 /g' | { \
  228. read ch0 ch1 ch2 ch3; \
  229. for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \
  230. printf '%s%03o' '\\' $$((0x$$ch)); \
  231. done; \
  232. } \
  233. )
  234. quiet_cmd_bzip2 = BZIP2 $@
  235. cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
  236. bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
  237. (rm -f $@ ; false)
  238. # Lzma
  239. # ---------------------------------------------------------------------------
  240. quiet_cmd_lzma = LZMA $@
  241. cmd_lzma = (cat $(filter-out FORCE,$^) | \
  242. lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
  243. (rm -f $@ ; false)
  244. quiet_cmd_lzo = LZO $@
  245. cmd_lzo = (cat $(filter-out FORCE,$^) | \
  246. lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
  247. (rm -f $@ ; false)
  248. quiet_cmd_lz4 = LZ4 $@
  249. cmd_lz4 = (cat $(filter-out FORCE,$^) | \
  250. lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
  251. (rm -f $@ ; false)
  252. # U-Boot mkimage
  253. # ---------------------------------------------------------------------------
  254. MKIMAGE := $(srctree)/scripts/mkuboot.sh
  255. # SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
  256. # the number of overrides in arch makefiles
  257. UIMAGE_ARCH ?= $(SRCARCH)
  258. UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
  259. UIMAGE_OPTS-y ?=
  260. UIMAGE_TYPE ?= kernel
  261. UIMAGE_LOADADDR ?= arch_must_set_this
  262. UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
  263. UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
  264. UIMAGE_IN ?= $<
  265. UIMAGE_OUT ?= $@
  266. quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT)
  267. cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
  268. -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
  269. -T $(UIMAGE_TYPE) \
  270. -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
  271. -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT)
  272. # XZ
  273. # ---------------------------------------------------------------------------
  274. # Use xzkern to compress the kernel image and xzmisc to compress other things.
  275. #
  276. # xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
  277. # of the kernel decompressor. A BCJ filter is used if it is available for
  278. # the target architecture. xzkern also appends uncompressed size of the data
  279. # using size_append. The .xz format has the size information available at
  280. # the end of the file too, but it's in more complex format and it's good to
  281. # avoid changing the part of the boot code that reads the uncompressed size.
  282. # Note that the bytes added by size_append will make the xz tool think that
  283. # the file is corrupt. This is expected.
  284. #
  285. # xzmisc doesn't use size_append, so it can be used to create normal .xz
  286. # files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
  287. # big dictionary would increase the memory usage too much in the multi-call
  288. # decompression mode. A BCJ filter isn't used either.
  289. quiet_cmd_xzkern = XZKERN $@
  290. cmd_xzkern = (cat $(filter-out FORCE,$^) | \
  291. sh $(srctree)/scripts/xz_wrap.sh && \
  292. $(call size_append, $(filter-out FORCE,$^))) > $@ || \
  293. (rm -f $@ ; false)
  294. quiet_cmd_xzmisc = XZMISC $@
  295. cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
  296. xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
  297. (rm -f $@ ; false)
  298. # misc stuff
  299. # ---------------------------------------------------------------------------
  300. quote:="