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))))
  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) $(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))
  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 = $(subst $(comma),_,$(subst -,_,$1))
 100 basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))"
 101 modname_flags  = $(if $(filter 1,$(words $(modname))),\
 102                  -D"KBUILD_MODNAME=KBUILD_STR($(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 _a_flags       = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
 108                  $(asflags-y) $(AFLAGS_$(basetarget).o)
 109 _cpp_flags     = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
 110
 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                 $(CFLAGS_GCOV))
 120 endif
 121
 122 # If building the kernel in a separate objtree expand all occurrences
 123 # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
 124
 125 ifeq ($(KBUILD_SRC),)
 126 __c_flags       = $(_c_flags)
 127 __a_flags       = $(_a_flags)
 128 __cpp_flags     = $(_cpp_flags)
 129 else
 130
 131 # -I$(obj) locates generated .h files
 132 # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
 133 #   and locates generated .h files
 134 # FIXME: Replace both with specific CFLAGS* statements in the makefiles
 135 __c_flags       = $(call addtree,-I$(obj)) $(call flags,_c_flags)
 136 __a_flags       =                          $(call flags,_a_flags)
 137 __cpp_flags     =                          $(call flags,_cpp_flags)
 138 endif
 139
 140 c_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
 141                  $(__c_flags) $(modkern_cflags)                           \
 142                  -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags)
 143
 144 a_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
 145                  $(__a_flags) $(modkern_aflags)
 146
 147 cpp_flags      = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
 148                  $(__cpp_flags)
 149
 150 ld_flags       = $(LDFLAGS) $(ldflags-y)
 151
 152 dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
 153                  -I$(srctree)/arch/$(SRCARCH)/boot/dts                   \
 154                  -I$(srctree)/arch/$(SRCARCH)/boot/dts/include           \
 155                  -undef -D__DTS__
 156
 157 # Finds the multi-part object the current object will be linked into
 158 modname-multi = $(sort $(foreach m,$(multi-used),\
 159                 $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
 160
 161 ifdef REGENERATE_PARSERS
 162
 163 # GPERF
 164 # ---------------------------------------------------------------------------
 165 quiet_cmd_gperf = GPERF $@
 166       cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $<
 167
 168 .PRECIOUS: $(src)/%.hash.c_shipped
 169 $(src)/%.hash.c_shipped: $(src)/%.gperf
 170         $(call cmd,gperf)
 171
 172 # LEX
 173 # ---------------------------------------------------------------------------
 174 LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
 175
 176 quiet_cmd_flex = LEX     $@
 177       cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<
 178
 179 .PRECIOUS: $(src)/%.lex.c_shipped
 180 $(src)/%.lex.c_shipped: $(src)/%.l
 181         $(call cmd,flex)
 182
 183 # YACC
 184 # ---------------------------------------------------------------------------
 185 YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)
 186
 187 quiet_cmd_bison = YACC    $@
 188       cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<
 189
 190 .PRECIOUS: $(src)/%.tab.c_shipped
 191 $(src)/%.tab.c_shipped: $(src)/%.y
 192         $(call cmd,bison)
 193
 194 quiet_cmd_bison_h = YACC    $@
 195       cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<
 196
 197 .PRECIOUS: $(src)/%.tab.h_shipped
 198 $(src)/%.tab.h_shipped: $(src)/%.y
 199         $(call cmd,bison_h)
 200
 201 endif
 202
 203 # Shipped files
 204 # ===========================================================================
 205
 206 quiet_cmd_shipped = SHIPPED $@
 207 cmd_shipped = cat $< > $@
 208
 209 $(obj)/%: $(src)/%_shipped
 210         $(call cmd,shipped)
 211
 212 # Commands useful for building a boot image
 213 # ===========================================================================
 214 #
 215 #       Use as following:
 216 #
 217 #       target: source(s) FORCE
 218 #               $(if_changed,ld/objcopy/gzip)
 219 #
 220 #       and add target to extra-y so that we know we have to
 221 #       read in the saved command line
 222
 223 # Linking
 224 # ---------------------------------------------------------------------------
 225
 226 quiet_cmd_ld = LD      $@
 227 cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
 228                $(filter-out FORCE,$^) -o $@
 229
 230 # Objcopy
 231 # ---------------------------------------------------------------------------
 232
 233 quiet_cmd_objcopy = OBJCOPY $@
 234 cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
 235
 236 # Gzip
 237 # ---------------------------------------------------------------------------
 238
 239 quiet_cmd_gzip = GZIP    $@
 240 cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
 241         (rm -f $@ ; false)
 242
 243 # DTC
 244 # ---------------------------------------------------------------------------
 245
 246 # Generate an assembly file to wrap the output of the device tree compiler
 247 quiet_cmd_dt_S_dtb= DTB    $@
 248 cmd_dt_S_dtb=                                           \
 249 (                                                       \
 250         echo '\#include <asm-generic/vmlinux.lds.h>';   \
 251         echo '.section .dtb.init.rodata,"a"';           \
 252         echo '.balign STRUCT_ALIGNMENT';                \
 253         echo '.global __dtb_$(*F)_begin';               \
 254         echo '__dtb_$(*F)_begin:';                      \
 255         echo '.incbin "$<" ';                           \
 256         echo '__dtb_$(*F)_end:';                        \
 257         echo '.global __dtb_$(*F)_end';                 \
 258         echo '.balign STRUCT_ALIGNMENT';                \
 259 ) > $@
 260
 261 $(obj)/%.dtb.S: $(obj)/%.dtb
 262         $(call cmd,dt_S_dtb)
 263
 264 quiet_cmd_dtc = DTC     $@
 265 cmd_dtc = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
 266         $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 \
 267                 -i $(dir $<) $(DTC_FLAGS) \
 268                 -d $(depfile).dtc.tmp $(dtc-tmp) ; \
 269         cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
 270
 271 $(obj)/%.dtb: $(src)/%.dts FORCE
 272         $(call if_changed_dep,dtc)
 273
 274 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
 275
 276 # cat
 277 # ---------------------------------------------------------------------------
 278 # Concatentate multiple files together
 279 quiet_cmd_cat = CAT     $@
 280 cmd_cat = (cat $(filter-out FORCE,$^) > $@) || (rm -f $@; false)
 281
 282 # Bzip2
 283 # ---------------------------------------------------------------------------
 284
 285 # Bzip2 and LZMA do not include size in file... so we have to fake that;
 286 # append the size as a 32-bit littleendian number as gzip does.
 287 size_append = printf $(shell                                            \
 288 dec_size=0;                                                             \
 289 for F in $1; do                                                         \
 290         fsize=$$(stat -c "%s" $$F);                                     \
 291         dec_size=$$(expr $$dec_size + $$fsize);                         \
 292 done;                                                                   \
 293 printf "%08x\n" $$dec_size |                                            \
 294         sed 's/\(..\)/\1 /g' | {                                        \
 295                 read ch0 ch1 ch2 ch3;                                   \
 296                 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do                   \
 297                         printf '%s%03o' '\\' $$((0x$$ch));              \
 298                 done;                                                   \
 299         }                                                               \
 300 )
 301
 302 quiet_cmd_bzip2 = BZIP2   $@
 303 cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
 304         bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 305         (rm -f $@ ; false)
 306
 307 # Lzma
 308 # ---------------------------------------------------------------------------
 309
 310 quiet_cmd_lzma = LZMA    $@
 311 cmd_lzma = (cat $(filter-out FORCE,$^) | \
 312         lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 313         (rm -f $@ ; false)
 314
 315 quiet_cmd_lzo = LZO     $@
 316 cmd_lzo = (cat $(filter-out FORCE,$^) | \
 317         lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 318         (rm -f $@ ; false)
 319
 320 # U-Boot mkimage
 321 # ---------------------------------------------------------------------------
 322
 323 MKIMAGE := $(srctree)/scripts/mkuboot.sh
 324
 325 # SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
 326 # the number of overrides in arch makefiles
 327 UIMAGE_ARCH ?= $(SRCARCH)
 328 UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
 329 UIMAGE_OPTS-y ?=
 330 UIMAGE_TYPE ?= kernel
 331 UIMAGE_LOADADDR ?= arch_must_set_this
 332 UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
 333 UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
 334 UIMAGE_IN ?= $<
 335 UIMAGE_OUT ?= $@
 336
 337 quiet_cmd_uimage = UIMAGE  $(UIMAGE_OUT)
 338       cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
 339                         -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
 340                         -T $(UIMAGE_TYPE) \
 341                         -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
 342                         -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT)
 343
 344 # XZ
 345 # ---------------------------------------------------------------------------
 346 # Use xzkern to compress the kernel image and xzmisc to compress other things.
 347 #
 348 # xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
 349 # of the kernel decompressor. A BCJ filter is used if it is available for
 350 # the target architecture. xzkern also appends uncompressed size of the data
 351 # using size_append. The .xz format has the size information available at
 352 # the end of the file too, but it's in more complex format and it's good to
 353 # avoid changing the part of the boot code that reads the uncompressed size.
 354 # Note that the bytes added by size_append will make the xz tool think that
 355 # the file is corrupt. This is expected.
 356 #
 357 # xzmisc doesn't use size_append, so it can be used to create normal .xz
 358 # files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
 359 # big dictionary would increase the memory usage too much in the multi-call
 360 # decompression mode. A BCJ filter isn't used either.
 361 quiet_cmd_xzkern = XZKERN  $@
 362 cmd_xzkern = (cat $(filter-out FORCE,$^) | \
 363         sh $(srctree)/scripts/xz_wrap.sh && \
 364         $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 365         (rm -f $@ ; false)
 366
 367 quiet_cmd_xzmisc = XZMISC  $@
 368 cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
 369         xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
 370         (rm -f $@ ; false)
 371
 372 # misc stuff
 373 # ---------------------------------------------------------------------------
 374 quote:="