Makefile.lib 14 KB

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  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. # U-Boot also uses $(CPPFLAGS)
  84. orig_c_flags = $(KBUILD_CPPFLAGS) $(CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
  85. $(ccflags-y) $(CFLAGS_$(basetarget).o)
  86. _c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
  87. _a_flags = $(KBUILD_CPPFLAGS) $(CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
  88. $(asflags-y) $(AFLAGS_$(basetarget).o)
  89. _cpp_flags = $(KBUILD_CPPFLAGS) $(CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
  90. #
  91. # Enable gcov profiling flags for a file, directory or for all files depending
  92. # on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
  93. # (in this order)
  94. #
  95. ifeq ($(CONFIG_GCOV_KERNEL),y)
  96. _c_flags += $(if $(patsubst n%,, \
  97. $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
  98. $(CFLAGS_GCOV))
  99. endif
  100. # If building the kernel in a separate objtree expand all occurrences
  101. # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
  102. ifeq ($(KBUILD_SRC),)
  103. __c_flags = $(_c_flags)
  104. __a_flags = $(_a_flags)
  105. __cpp_flags = $(_cpp_flags)
  106. else
  107. # -I$(obj) locates generated .h files
  108. # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
  109. # and locates generated .h files
  110. # FIXME: Replace both with specific CFLAGS* statements in the makefiles
  111. __c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags)
  112. __a_flags = $(call flags,_a_flags)
  113. __cpp_flags = $(call flags,_cpp_flags)
  114. endif
  115. # Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE
  116. c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
  117. $(__c_flags) $(modkern_cflags) \
  118. -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags)
  119. a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
  120. $(__a_flags) $(modkern_aflags)
  121. cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
  122. $(__cpp_flags)
  123. ld_flags = $(LDFLAGS) $(ldflags-y)
  124. dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
  125. -I$(srctree)/arch/$(SRCARCH)/boot/dts \
  126. -I$(srctree)/arch/$(SRCARCH)/boot/dts/include \
  127. -undef -D__DTS__
  128. # Finds the multi-part object the current object will be linked into
  129. modname-multi = $(sort $(foreach m,$(multi-used),\
  130. $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
  131. ifdef REGENERATE_PARSERS
  132. # GPERF
  133. # ---------------------------------------------------------------------------
  134. quiet_cmd_gperf = GPERF $@
  135. cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $<
  136. .PRECIOUS: $(src)/%.hash.c_shipped
  137. $(src)/%.hash.c_shipped: $(src)/%.gperf
  138. $(call cmd,gperf)
  139. # LEX
  140. # ---------------------------------------------------------------------------
  141. LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
  142. quiet_cmd_flex = LEX $@
  143. cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<
  144. .PRECIOUS: $(src)/%.lex.c_shipped
  145. $(src)/%.lex.c_shipped: $(src)/%.l
  146. $(call cmd,flex)
  147. # YACC
  148. # ---------------------------------------------------------------------------
  149. YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)
  150. quiet_cmd_bison = YACC $@
  151. cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<
  152. .PRECIOUS: $(src)/%.tab.c_shipped
  153. $(src)/%.tab.c_shipped: $(src)/%.y
  154. $(call cmd,bison)
  155. quiet_cmd_bison_h = YACC $@
  156. cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<
  157. .PRECIOUS: $(src)/%.tab.h_shipped
  158. $(src)/%.tab.h_shipped: $(src)/%.y
  159. $(call cmd,bison_h)
  160. endif
  161. # Shipped files
  162. # ===========================================================================
  163. quiet_cmd_shipped = SHIPPED $@
  164. cmd_shipped = cat $< > $@
  165. $(obj)/%: $(src)/%_shipped
  166. $(call cmd,shipped)
  167. # Commands useful for building a boot image
  168. # ===========================================================================
  169. #
  170. # Use as following:
  171. #
  172. # target: source(s) FORCE
  173. # $(if_changed,ld/objcopy/gzip)
  174. #
  175. # and add target to extra-y so that we know we have to
  176. # read in the saved command line
  177. # Linking
  178. # ---------------------------------------------------------------------------
  179. quiet_cmd_ld = LD $@
  180. cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
  181. $(filter-out FORCE,$^) -o $@
  182. # Objcopy
  183. # ---------------------------------------------------------------------------
  184. quiet_cmd_objcopy = OBJCOPY $@
  185. cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
  186. # Gzip
  187. # ---------------------------------------------------------------------------
  188. quiet_cmd_gzip = GZIP $@
  189. cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
  190. (rm -f $@ ; false)
  191. # DTC
  192. # ---------------------------------------------------------------------------
  193. # Generate an assembly file to wrap the output of the device tree compiler
  194. quiet_cmd_dt_S_dtb= DTB $@
  195. cmd_dt_S_dtb= \
  196. ( \
  197. echo '\#include <asm-generic/vmlinux.lds.h>'; \
  198. echo '.section .dtb.init.rodata,"a"'; \
  199. echo '.balign STRUCT_ALIGNMENT'; \
  200. echo '.global __dtb_$(*F)_begin'; \
  201. echo '__dtb_$(*F)_begin:'; \
  202. echo '.incbin "$<" '; \
  203. echo '__dtb_$(*F)_end:'; \
  204. echo '.global __dtb_$(*F)_end'; \
  205. echo '.balign STRUCT_ALIGNMENT'; \
  206. ) > $@
  207. $(obj)/%.dtb.S: $(obj)/%.dtb
  208. $(call cmd,dt_S_dtb)
  209. quiet_cmd_dtc = DTC $@
  210. cmd_dtc = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
  211. $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 \
  212. -i $(dir $<) $(DTC_FLAGS) \
  213. -d $(depfile).dtc.tmp $(dtc-tmp) ; \
  214. cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
  215. $(obj)/%.dtb: $(src)/%.dts FORCE
  216. $(call if_changed_dep,dtc)
  217. dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
  218. # Bzip2
  219. # ---------------------------------------------------------------------------
  220. # Bzip2 and LZMA do not include size in file... so we have to fake that;
  221. # append the size as a 32-bit littleendian number as gzip does.
  222. size_append = printf $(shell \
  223. dec_size=0; \
  224. for F in $1; do \
  225. fsize=$$(stat -c "%s" $$F); \
  226. dec_size=$$(expr $$dec_size + $$fsize); \
  227. done; \
  228. printf "%08x\n" $$dec_size | \
  229. sed 's/\(..\)/\1 /g' | { \
  230. read ch0 ch1 ch2 ch3; \
  231. for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \
  232. printf '%s%03o' '\\' $$((0x$$ch)); \
  233. done; \
  234. } \
  235. )
  236. quiet_cmd_bzip2 = BZIP2 $@
  237. cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
  238. bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
  239. (rm -f $@ ; false)
  240. # Lzma
  241. # ---------------------------------------------------------------------------
  242. quiet_cmd_lzma = LZMA $@
  243. cmd_lzma = (cat $(filter-out FORCE,$^) | \
  244. lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
  245. (rm -f $@ ; false)
  246. quiet_cmd_lzo = LZO $@
  247. cmd_lzo = (cat $(filter-out FORCE,$^) | \
  248. lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
  249. (rm -f $@ ; false)
  250. quiet_cmd_lz4 = LZ4 $@
  251. cmd_lz4 = (cat $(filter-out FORCE,$^) | \
  252. lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
  253. (rm -f $@ ; false)
  254. # U-Boot mkimage
  255. # ---------------------------------------------------------------------------
  256. MKIMAGE := $(srctree)/scripts/mkuboot.sh
  257. # SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
  258. # the number of overrides in arch makefiles
  259. UIMAGE_ARCH ?= $(SRCARCH)
  260. UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
  261. UIMAGE_OPTS-y ?=
  262. UIMAGE_TYPE ?= kernel
  263. UIMAGE_LOADADDR ?= arch_must_set_this
  264. UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
  265. UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
  266. UIMAGE_IN ?= $<
  267. UIMAGE_OUT ?= $@
  268. quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT)
  269. cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
  270. -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
  271. -T $(UIMAGE_TYPE) \
  272. -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
  273. -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT)
  274. # XZ
  275. # ---------------------------------------------------------------------------
  276. # Use xzkern to compress the kernel image and xzmisc to compress other things.
  277. #
  278. # xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
  279. # of the kernel decompressor. A BCJ filter is used if it is available for
  280. # the target architecture. xzkern also appends uncompressed size of the data
  281. # using size_append. The .xz format has the size information available at
  282. # the end of the file too, but it's in more complex format and it's good to
  283. # avoid changing the part of the boot code that reads the uncompressed size.
  284. # Note that the bytes added by size_append will make the xz tool think that
  285. # the file is corrupt. This is expected.
  286. #
  287. # xzmisc doesn't use size_append, so it can be used to create normal .xz
  288. # files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
  289. # big dictionary would increase the memory usage too much in the multi-call
  290. # decompression mode. A BCJ filter isn't used either.
  291. quiet_cmd_xzkern = XZKERN $@
  292. cmd_xzkern = (cat $(filter-out FORCE,$^) | \
  293. sh $(srctree)/scripts/xz_wrap.sh && \
  294. $(call size_append, $(filter-out FORCE,$^))) > $@ || \
  295. (rm -f $@ ; false)
  296. quiet_cmd_xzmisc = XZMISC $@
  297. cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
  298. xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
  299. (rm -f $@ ; false)
  300. # misc stuff
  301. # ---------------------------------------------------------------------------
  302. quote:="