scripts/Makefile.build

   1 # ==========================================================================
   2 # Building
   3 # ==========================================================================
   4
   5 # Modified for U-Boot
   6 prefix := tpl
   7 src := $(patsubst $(prefix)/%,%,$(obj))
   8 ifeq ($(obj),$(src))
   9 prefix := spl
  10 src := $(patsubst $(prefix)/%,%,$(obj))
  11 ifeq ($(obj),$(src))
  12 prefix := .
  13 endif
  14 endif
  15
  16 PHONY := __build
  17 __build:
  18
  19 # Init all relevant variables used in kbuild files so
  20 # 1) they have correct type
  21 # 2) they do not inherit any value from the environment
  22 obj-y :=
  23 obj-m :=
  24 lib-y :=
  25 lib-m :=
  26 always :=
  27 targets :=
  28 subdir-y :=
  29 subdir-m :=
  30 EXTRA_AFLAGS   :=
  31 EXTRA_CFLAGS   :=
  32 EXTRA_CPPFLAGS :=
  33 EXTRA_LDFLAGS  :=
  34 asflags-y  :=
  35 ccflags-y  :=
  36 cppflags-y :=
  37 ldflags-y  :=
  38
  39 subdir-asflags-y :=
  40 subdir-ccflags-y :=
  41
  42 # Read auto.conf if it exists, otherwise ignore
  43 # Modified for U-Boot
  44 -include $(prefix)/include/config/auto.conf
  45 -include $(prefix)/include/autoconf.mk
  46
  47 include scripts/Kbuild.include
  48
  49 # For backward compatibility check that these variables do not change
  50 save-cflags := $(CFLAGS)
  51
  52 # The filename Kbuild has precedence over Makefile
  53 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
  54 kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
  55 include $(kbuild-file)
  56
  57 # Added for U-Boot
  58 asflags-y  += $(PLATFORM_CPPFLAGS)
  59 ccflags-y  += $(PLATFORM_CPPFLAGS)
  60 cppflags-y += $(PLATFORM_CPPFLAGS)
  61
  62 # If the save-* variables changed error out
  63 ifeq ($(KBUILD_NOPEDANTIC),)
  64         ifneq ("$(save-cflags)","$(CFLAGS)")
  65                 $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
  66         endif
  67 endif
  68
  69 include scripts/Makefile.lib
  70
  71 ifdef host-progs
  72 ifneq ($(hostprogs-y),$(host-progs))
  73 $(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!)
  74 hostprogs-y += $(host-progs)
  75 endif
  76 endif
  77
  78 # Do not include host rules unless needed
  79 ifneq ($(hostprogs-y)$(hostprogs-m),)
  80 include scripts/Makefile.host
  81 endif
  82
  83 # Uncommented for U-Boot
  84 #  We need to create output dicrectory for SPL and TPL even for in-tree build
  85 #ifneq ($(KBUILD_SRC),)
  86 # Create output directory if not already present
  87 _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
  88
  89 # Create directories for object files if directory does not exist
  90 # Needed when obj-y := dir/file.o syntax is used
  91 _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d)))
  92 #endif
  93
  94 ifndef obj
  95 $(warning kbuild: Makefile.build is included improperly)
  96 endif
  97
  98 # ===========================================================================
  99
 100 ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
 101 lib-target := $(obj)/lib.a
 102 endif
 103
 104 ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
 105 builtin-target := $(obj)/built-in.o
 106 endif
 107
 108 modorder-target := $(obj)/modules.order
 109
 110 # We keep a list of all modules in $(MODVERDIR)
 111
 112 __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
 113          $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
 114          $(subdir-ym) $(always)
 115         @:
 116
 117 # Linus' kernel sanity checking tool
 118 ifneq ($(KBUILD_CHECKSRC),0)
 119   ifeq ($(KBUILD_CHECKSRC),2)
 120     quiet_cmd_force_checksrc = CHECK   $<
 121           cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
 122   else
 123       quiet_cmd_checksrc     = CHECK   $<
 124             cmd_checksrc     = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
 125   endif
 126 endif
 127
 128 # Do section mismatch analysis for each module/built-in.o
 129 ifdef CONFIG_DEBUG_SECTION_MISMATCH
 130   cmd_secanalysis = ; scripts/mod/modpost $@
 131 endif
 132
 133 # Compile C sources (.c)
 134 # ---------------------------------------------------------------------------
 135
 136 # Default is built-in, unless we know otherwise
 137 modkern_cflags =                                          \
 138         $(if $(part-of-module),                           \
 139                 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
 140                 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
 141 quiet_modtag := $(empty)   $(empty)
 142
 143 $(real-objs-m)        : part-of-module := y
 144 $(real-objs-m:.o=.i)  : part-of-module := y
 145 $(real-objs-m:.o=.s)  : part-of-module := y
 146 $(real-objs-m:.o=.lst): part-of-module := y
 147
 148 $(real-objs-m)        : quiet_modtag := [M]
 149 $(real-objs-m:.o=.i)  : quiet_modtag := [M]
 150 $(real-objs-m:.o=.s)  : quiet_modtag := [M]
 151 $(real-objs-m:.o=.lst): quiet_modtag := [M]
 152
 153 $(obj-m)              : quiet_modtag := [M]
 154
 155 # Default for not multi-part modules
 156 modname = $(basetarget)
 157
 158 $(multi-objs-m)         : modname = $(modname-multi)
 159 $(multi-objs-m:.o=.i)   : modname = $(modname-multi)
 160 $(multi-objs-m:.o=.s)   : modname = $(modname-multi)
 161 $(multi-objs-m:.o=.lst) : modname = $(modname-multi)
 162 $(multi-objs-y)         : modname = $(modname-multi)
 163 $(multi-objs-y:.o=.i)   : modname = $(modname-multi)
 164 $(multi-objs-y:.o=.s)   : modname = $(modname-multi)
 165 $(multi-objs-y:.o=.lst) : modname = $(modname-multi)
 166
 167 quiet_cmd_cc_s_c = CC $(quiet_modtag)  $@
 168 cmd_cc_s_c       = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
 169
 170 $(obj)/%.s: $(src)/%.c FORCE
 171         $(call if_changed_dep,cc_s_c)
 172
 173 quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
 174 cmd_cc_i_c       = $(CPP) $(c_flags)   -o $@ $<
 175
 176 $(obj)/%.i: $(src)/%.c FORCE
 177         $(call if_changed_dep,cc_i_c)
 178
 179 cmd_gensymtypes =                                                           \
 180     $(CPP) -D__GENKSYMS__ $(c_flags) $< |                                   \
 181     $(GENKSYMS) $(if $(1), -T $(2))                                         \
 182      $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))             \
 183      $(if $(KBUILD_PRESERVE),-p)                                            \
 184      -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
 185
 186 quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
 187 cmd_cc_symtypes_c =                                                         \
 188     set -e;                                                                 \
 189     $(call cmd_gensymtypes,true,$@) >/dev/null;                             \
 190     test -s $@ || rm -f $@
 191
 192 $(obj)/%.symtypes : $(src)/%.c FORCE
 193         $(call cmd,cc_symtypes_c)
 194
 195 # C (.c) files
 196 # The C file is compiled and updated dependency information is generated.
 197 # (See cmd_cc_o_c + relevant part of rule_cc_o_c)
 198
 199 quiet_cmd_cc_o_c = CC $(quiet_modtag)  $@
 200
 201 ifndef CONFIG_MODVERSIONS
 202 cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
 203
 204 else
 205 # When module versioning is enabled the following steps are executed:
 206 # o compile a .tmp_<file>.o from <file>.c
 207 # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
 208 #   not export symbols, we just rename .tmp_<file>.o to <file>.o and
 209 #   are done.
 210 # o otherwise, we calculate symbol versions using the good old
 211 #   genksyms on the preprocessed source and postprocess them in a way
 212 #   that they are usable as a linker script
 213 # o generate <file>.o from .tmp_<file>.o using the linker to
 214 #   replace the unresolved symbols __crc_exported_symbol with
 215 #   the actual value of the checksum generated by genksyms
 216
 217 cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
 218 cmd_modversions =                                                               \
 219         if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then             \
 220                 $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes))    \
 221                     > $(@D)/.tmp_$(@F:.o=.ver);                                 \
 222                                                                                 \
 223                 $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F)                      \
 224                         -T $(@D)/.tmp_$(@F:.o=.ver);                            \
 225                 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver);                \
 226         else                                                                    \
 227                 mv -f $(@D)/.tmp_$(@F) $@;                                      \
 228         fi;
 229 endif
 230
 231 ifdef CONFIG_FTRACE_MCOUNT_RECORD
 232 ifdef BUILD_C_RECORDMCOUNT
 233 ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
 234   RECORDMCOUNT_FLAGS = -w
 235 endif
 236 # Due to recursion, we must skip empty.o.
 237 # The empty.o file is created in the make process in order to determine
 238 #  the target endianness and word size. It is made before all other C
 239 #  files, including recordmcount.
 240 sub_cmd_record_mcount =                                 \
 241         if [ $(@) != "scripts/mod/empty.o" ]; then      \
 242                 $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)";   \
 243         fi;
 244 recordmcount_source := $(srctree)/scripts/recordmcount.c \
 245                     $(srctree)/scripts/recordmcount.h
 246 else
 247 sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
 248         "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
 249         "$(if $(CONFIG_64BIT),64,32)" \
 250         "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \
 251         "$(LD)" "$(NM)" "$(RM)" "$(MV)" \
 252         "$(if $(part-of-module),1,0)" "$(@)";
 253 recordmcount_source := $(srctree)/scripts/recordmcount.pl
 254 endif
 255 cmd_record_mcount =                                             \
 256         if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then    \
 257                 $(sub_cmd_record_mcount)                        \
 258         fi;
 259 endif
 260
 261 define rule_cc_o_c
 262         $(call echo-cmd,checksrc) $(cmd_checksrc)                         \
 263         $(call echo-cmd,cc_o_c) $(cmd_cc_o_c);                            \
 264         $(cmd_modversions)                                                \
 265         $(call echo-cmd,record_mcount)                                    \
 266         $(cmd_record_mcount)                                              \
 267         scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' >    \
 268                                                       $(dot-target).tmp;  \
 269         rm -f $(depfile);                                                 \
 270         mv -f $(dot-target).tmp $(dot-target).cmd
 271 endef
 272
 273 # Built-in and composite module parts
 274 $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
 275         $(call cmd,force_checksrc)
 276         $(call if_changed_rule,cc_o_c)
 277
 278 # Single-part modules are special since we need to mark them in $(MODVERDIR)
 279
 280 $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
 281         $(call cmd,force_checksrc)
 282         $(call if_changed_rule,cc_o_c)
 283         @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
 284
 285 quiet_cmd_cc_lst_c = MKLST   $@
 286       cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
 287                      $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
 288                                      System.map $(OBJDUMP) > $@
 289
 290 $(obj)/%.lst: $(src)/%.c FORCE
 291         $(call if_changed_dep,cc_lst_c)
 292
 293 # Compile assembler sources (.S)
 294 # ---------------------------------------------------------------------------
 295
 296 modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
 297
 298 $(real-objs-m)      : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
 299 $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
 300
 301 quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
 302 cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $<
 303
 304 $(obj)/%.s: $(src)/%.S FORCE
 305         $(call if_changed_dep,as_s_S)
 306
 307 quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
 308 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 309
 310 $(obj)/%.o: $(src)/%.S FORCE
 311         $(call if_changed_dep,as_o_S)
 312
 313 targets += $(real-objs-y) $(real-objs-m) $(lib-y)
 314 targets += $(extra-y) $(MAKECMDGOALS) $(always)
 315
 316 # Linker scripts preprocessor (.lds.S -> .lds)
 317 # ---------------------------------------------------------------------------
 318 quiet_cmd_cpp_lds_S = LDS     $@
 319       cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
 320                              -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
 321
 322 $(obj)/%.lds: $(src)/%.lds.S FORCE
 323         $(call if_changed_dep,cpp_lds_S)
 324
 325 # ASN.1 grammar
 326 # ---------------------------------------------------------------------------
 327 quiet_cmd_asn1_compiler = ASN.1   $@
 328       cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
 329                                 $(subst .h,.c,$@) $(subst .c,.h,$@)
 330
 331 .PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h
 332
 333 $(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
 334         $(call cmd,asn1_compiler)
 335
 336 # Build the compiled-in targets
 337 # ---------------------------------------------------------------------------
 338
 339 # To build objects in subdirs, we need to descend into the directories
 340 $(sort $(subdir-obj-y)): $(subdir-ym) ;
 341
 342 #
 343 # Rule to compile a set of .o files into one .o file
 344 #
 345 ifdef builtin-target
 346 quiet_cmd_link_o_target = LD      $@
 347 # If the list of objects to link is empty, just create an empty built-in.o
 348 cmd_link_o_target = $(if $(strip $(obj-y)),\
 349                       $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \
 350                       $(cmd_secanalysis),\
 351                       rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@)
 352
 353 $(builtin-target): $(obj-y) FORCE
 354         $(call if_changed,link_o_target)
 355
 356 targets += $(builtin-target)
 357 endif # builtin-target
 358
 359 #
 360 # Rule to create modules.order file
 361 #
 362 # Create commands to either record .ko file or cat modules.order from
 363 # a subdirectory
 364 modorder-cmds =                                         \
 365         $(foreach m, $(modorder),                       \
 366                 $(if $(filter %/modules.order, $m),     \
 367                         cat $m;, echo kernel/$m;))
 368
 369 $(modorder-target): $(subdir-ym) FORCE
 370         $(Q)(cat /dev/null; $(modorder-cmds)) > $@
 371
 372 #
 373 # Rule to compile a set of .o files into one .a file
 374 #
 375 ifdef lib-target
 376 quiet_cmd_link_l_target = AR      $@
 377 cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y)
 378
 379 $(lib-target): $(lib-y) FORCE
 380         $(call if_changed,link_l_target)
 381
 382 targets += $(lib-target)
 383 endif
 384
 385 #
 386 # Rule to link composite objects
 387 #
 388 #  Composite objects are specified in kbuild makefile as follows:
 389 #    <composite-object>-objs := <list of .o files>
 390 #  or
 391 #    <composite-object>-y    := <list of .o files>
 392 link_multi_deps =                     \
 393 $(filter $(addprefix $(obj)/,         \
 394 $($(subst $(obj)/,,$(@:.o=-objs)))    \
 395 $($(subst $(obj)/,,$(@:.o=-y)))), $^)
 396
 397 quiet_cmd_link_multi-y = LD      $@
 398 cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
 399
 400 quiet_cmd_link_multi-m = LD [M]  $@
 401 cmd_link_multi-m = $(cmd_link_multi-y)
 402
 403 $(multi-used-y): FORCE
 404         $(call if_changed,link_multi-y)
 405 $(call multi_depend, $(multi-used-y), .o, -objs -y)
 406
 407 $(multi-used-m): FORCE
 408         $(call if_changed,link_multi-m)
 409         @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
 410 $(call multi_depend, $(multi-used-m), .o, -objs -y)
 411
 412 targets += $(multi-used-y) $(multi-used-m)
 413
 414
 415 # Descending
 416 # ---------------------------------------------------------------------------
 417
 418 PHONY += $(subdir-ym)
 419 $(subdir-ym):
 420         $(Q)$(MAKE) $(build)=$@
 421
 422 # Add FORCE to the prequisites of a target to force it to be always rebuilt.
 423 # ---------------------------------------------------------------------------
 424
 425 PHONY += FORCE
 426
 427 FORCE:
 428
 429 # Read all saved command lines and dependencies for the $(targets) we
 430 # may be building above, using $(if_changed{,_dep}). As an
 431 # optimization, we don't need to read them if the target does not
 432 # exist, we will rebuild anyway in that case.
 433
 434 targets := $(wildcard $(sort $(targets)))
 435 cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
 436
 437 ifneq ($(cmd_files),)
 438   include $(cmd_files)
 439 endif
 440
 441 # Declare the contents of the .PHONY variable as phony.  We keep that
 442 # information in a variable se we can use it in if_changed and friends.
 443
 444 .PHONY: $(PHONY)