scripts/Makefile.build

   1 # SPDX-License-Identifier: GPL-2.0
   2 # ==========================================================================
   3 # Building
   4 # ==========================================================================
   5
   6 # Modified for U-Boot
   7 prefix := tpl
   8 src := $(patsubst $(prefix)/%,%,$(obj))
   9 ifeq ($(obj),$(src))
  10 prefix := spl
  11 src := $(patsubst $(prefix)/%,%,$(obj))
  12 ifeq ($(obj),$(src))
  13 prefix := .
  14 endif
  15 endif
  16
  17 PHONY := __build
  18 __build:
  19
  20 # Init all relevant variables used in kbuild files so
  21 # 1) they have correct type
  22 # 2) they do not inherit any value from the environment
  23 obj-y :=
  24 obj-m :=
  25 lib-y :=
  26 lib-m :=
  27 always :=
  28 targets :=
  29 subdir-y :=
  30 subdir-m :=
  31 EXTRA_AFLAGS   :=
  32 EXTRA_CFLAGS   :=
  33 EXTRA_CPPFLAGS :=
  34 EXTRA_LDFLAGS  :=
  35 asflags-y  :=
  36 ccflags-y  :=
  37 cppflags-y :=
  38 ldflags-y  :=
  39
  40 subdir-asflags-y :=
  41 subdir-ccflags-y :=
  42
  43 # Read auto.conf if it exists, otherwise ignore
  44 # Modified for U-Boot
  45 -include include/config/auto.conf
  46 -include $(prefix)/include/autoconf.mk
  47 include scripts/Makefile.uncmd_spl
  48
  49 include scripts/Kbuild.include
  50
  51 # For backward compatibility check that these variables do not change
  52 save-cflags := $(CFLAGS)
  53
  54 # The filename Kbuild has precedence over Makefile
  55 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
  56 kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
  57 include $(kbuild-file)
  58
  59 # Added for U-Boot
  60 asflags-y  += $(PLATFORM_CPPFLAGS)
  61 ccflags-y  += $(PLATFORM_CPPFLAGS)
  62 cppflags-y += $(PLATFORM_CPPFLAGS)
  63
  64 # If the save-* variables changed error out
  65 ifeq ($(KBUILD_NOPEDANTIC),)
  66         ifneq ("$(save-cflags)","$(CFLAGS)")
  67                 $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
  68         endif
  69 endif
  70
  71 include scripts/Makefile.lib
  72
  73 # Do not include host rules unless needed
  74 ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
  75 include scripts/Makefile.host
  76 endif
  77
  78 ifndef obj
  79 $(warning kbuild: Makefile.build is included improperly)
  80 endif
  81
  82 # ===========================================================================
  83
  84 ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
  85 lib-target := $(obj)/lib.a
  86 endif
  87
  88 ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
  89 builtin-target := $(obj)/built-in.o
  90 endif
  91
  92 modorder-target := $(obj)/modules.order
  93
  94 # We keep a list of all modules in $(MODVERDIR)
  95
  96 __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
  97          $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
  98          $(subdir-ym) $(always)
  99         @:
 100
 101 # Linus' kernel sanity checking tool
 102 ifneq ($(KBUILD_CHECKSRC),0)
 103   ifeq ($(KBUILD_CHECKSRC),2)
 104     quiet_cmd_force_checksrc = CHECK   $<
 105           cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
 106   else
 107       quiet_cmd_checksrc     = CHECK   $<
 108             cmd_checksrc     = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
 109   endif
 110 endif
 111
 112 # Do section mismatch analysis for each module/built-in.o
 113 ifdef CONFIG_DEBUG_SECTION_MISMATCH
 114   cmd_secanalysis = ; scripts/mod/modpost $@
 115 endif
 116
 117 # Compile C sources (.c)
 118 # ---------------------------------------------------------------------------
 119
 120 # Default is built-in, unless we know otherwise
 121 modkern_cflags =                                          \
 122         $(if $(part-of-module),                           \
 123                 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
 124                 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
 125 quiet_modtag := $(empty)   $(empty)
 126
 127 $(real-objs-m)        : part-of-module := y
 128 $(real-objs-m:.o=.i)  : part-of-module := y
 129 $(real-objs-m:.o=.s)  : part-of-module := y
 130 $(real-objs-m:.o=.lst): part-of-module := y
 131
 132 $(real-objs-m)        : quiet_modtag := [M]
 133 $(real-objs-m:.o=.i)  : quiet_modtag := [M]
 134 $(real-objs-m:.o=.s)  : quiet_modtag := [M]
 135 $(real-objs-m:.o=.lst): quiet_modtag := [M]
 136
 137 $(obj-m)              : quiet_modtag := [M]
 138
 139 # Default for not multi-part modules
 140 modname = $(basetarget)
 141
 142 $(multi-objs-m)         : modname = $(modname-multi)
 143 $(multi-objs-m:.o=.i)   : modname = $(modname-multi)
 144 $(multi-objs-m:.o=.s)   : modname = $(modname-multi)
 145 $(multi-objs-m:.o=.lst) : modname = $(modname-multi)
 146 $(multi-objs-y)         : modname = $(modname-multi)
 147 $(multi-objs-y:.o=.i)   : modname = $(modname-multi)
 148 $(multi-objs-y:.o=.s)   : modname = $(modname-multi)
 149 $(multi-objs-y:.o=.lst) : modname = $(modname-multi)
 150
 151 quiet_cmd_cc_s_c = CC $(quiet_modtag)  $@
 152 cmd_cc_s_c       = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
 153
 154 $(obj)/%.s: $(src)/%.c FORCE
 155         $(call if_changed_dep,cc_s_c)
 156
 157 quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
 158 cmd_cc_i_c       = $(CPP) $(c_flags)   -o $@ $<
 159
 160 $(obj)/%.i: $(src)/%.c FORCE
 161         $(call if_changed_dep,cc_i_c)
 162
 163 cmd_gensymtypes =                                                           \
 164     $(CPP) -D__GENKSYMS__ $(c_flags) $< |                                   \
 165     $(GENKSYMS) $(if $(1), -T $(2))                                         \
 166      $(if $(KBUILD_PRESERVE),-p)                                            \
 167      -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
 168
 169 quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
 170 cmd_cc_symtypes_c =                                                         \
 171     set -e;                                                                 \
 172     $(call cmd_gensymtypes,true,$@) >/dev/null;                             \
 173     test -s $@ || rm -f $@
 174
 175 $(obj)/%.symtypes : $(src)/%.c FORCE
 176         $(call cmd,cc_symtypes_c)
 177
 178 # C (.c) files
 179 # The C file is compiled and updated dependency information is generated.
 180 # (See cmd_cc_o_c + relevant part of rule_cc_o_c)
 181
 182 quiet_cmd_cc_o_c = CC $(quiet_modtag)  $@
 183
 184 ifndef CONFIG_MODVERSIONS
 185 cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
 186
 187 else
 188 # When module versioning is enabled the following steps are executed:
 189 # o compile a .tmp_<file>.o from <file>.c
 190 # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
 191 #   not export symbols, we just rename .tmp_<file>.o to <file>.o and
 192 #   are done.
 193 # o otherwise, we calculate symbol versions using the good old
 194 #   genksyms on the preprocessed source and postprocess them in a way
 195 #   that they are usable as a linker script
 196 # o generate <file>.o from .tmp_<file>.o using the linker to
 197 #   replace the unresolved symbols __crc_exported_symbol with
 198 #   the actual value of the checksum generated by genksyms
 199
 200 cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
 201 cmd_modversions =                                                               \
 202         if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then             \
 203                 $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes))    \
 204                     > $(@D)/.tmp_$(@F:.o=.ver);                                 \
 205                                                                                 \
 206                 $(LD) $(KBUILD_LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F)               \
 207                         -T $(@D)/.tmp_$(@F:.o=.ver);                            \
 208                 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver);                \
 209         else                                                                    \
 210                 mv -f $(@D)/.tmp_$(@F) $@;                                      \
 211         fi;
 212 endif
 213
 214 ifdef CONFIG_FTRACE_MCOUNT_RECORD
 215 # gcc 5 supports generating the mcount tables directly
 216 ifneq ($(call cc-option,-mrecord-mcount,y),y)
 217 KBUILD_CFLAGS += -mrecord-mcount
 218 else
 219 # else do it all manually
 220 ifdef BUILD_C_RECORDMCOUNT
 221 ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
 222   RECORDMCOUNT_FLAGS = -w
 223 endif
 224 # Due to recursion, we must skip empty.o.
 225 # The empty.o file is created in the make process in order to determine
 226 #  the target endianness and word size. It is made before all other C
 227 #  files, including recordmcount.
 228 sub_cmd_record_mcount =                                 \
 229         if [ $(@) != "scripts/mod/empty.o" ]; then      \
 230                 $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)";   \
 231         fi;
 232 recordmcount_source := $(srctree)/scripts/recordmcount.c \
 233                     $(srctree)/scripts/recordmcount.h
 234 else
 235 sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
 236         "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
 237         "$(if $(CONFIG_64BIT),64,32)" \
 238         "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \
 239         "$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \
 240         "$(if $(part-of-module),1,0)" "$(@)";
 241 recordmcount_source := $(srctree)/scripts/recordmcount.pl
 242 endif
 243 cmd_record_mcount =                                             \
 244         if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" =   \
 245              "$(CC_FLAGS_FTRACE)" ]; then                       \
 246                 $(sub_cmd_record_mcount)                        \
 247         fi;
 248 endif # -record-mcount
 249 endif
 250
 251 define rule_cc_o_c
 252         $(call echo-cmd,checksrc) $(cmd_checksrc)                         \
 253         $(call echo-cmd,cc_o_c) $(cmd_cc_o_c);                            \
 254         $(cmd_modversions)                                                \
 255         $(call echo-cmd,record_mcount)                                    \
 256         $(cmd_record_mcount)                                              \
 257         scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' >    \
 258                                                       $(dot-target).tmp;  \
 259         rm -f $(depfile);                                                 \
 260         mv -f $(dot-target).tmp $(dot-target).cmd
 261 endef
 262
 263 # Built-in and composite module parts
 264 $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
 265         $(call cmd,force_checksrc)
 266         $(call if_changed_rule,cc_o_c)
 267
 268 # Single-part modules are special since we need to mark them in $(MODVERDIR)
 269
 270 $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
 271         $(call cmd,force_checksrc)
 272         $(call if_changed_rule,cc_o_c)
 273         @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
 274
 275 quiet_cmd_cc_lst_c = MKLST   $@
 276       cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
 277                      $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
 278                                      System.map $(OBJDUMP) > $@
 279
 280 $(obj)/%.lst: $(src)/%.c FORCE
 281         $(call if_changed_dep,cc_lst_c)
 282
 283 # Compile assembler sources (.S)
 284 # ---------------------------------------------------------------------------
 285
 286 modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
 287
 288 $(real-objs-m)      : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
 289 $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
 290
 291 quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
 292 cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $<
 293
 294 $(obj)/%.s: $(src)/%.S FORCE
 295         $(call if_changed_dep,as_s_S)
 296
 297 quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
 298 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 299
 300 $(obj)/%.o: $(src)/%.S FORCE
 301         $(call if_changed_dep,as_o_S)
 302
 303 targets += $(real-objs-y) $(real-objs-m) $(lib-y)
 304 targets += $(extra-y) $(MAKECMDGOALS) $(always)
 305
 306 # Linker scripts preprocessor (.lds.S -> .lds)
 307 # ---------------------------------------------------------------------------
 308 quiet_cmd_cpp_lds_S = LDS     $@
 309       cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
 310                              -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
 311
 312 $(obj)/%.lds: $(src)/%.lds.S FORCE
 313         $(call if_changed_dep,cpp_lds_S)
 314
 315 # ASN.1 grammar
 316 # ---------------------------------------------------------------------------
 317 quiet_cmd_asn1_compiler = ASN.1   $@
 318       cmd_asn1_compiler = $(objtree)/tools/asn1_compiler $< \
 319                                 $(subst .h,.c,$@) $(subst .c,.h,$@)
 320
 321 $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/tools/asn1_compiler
 322         $(call cmd,asn1_compiler)
 323
 324 # Build the compiled-in targets
 325 # ---------------------------------------------------------------------------
 326
 327 # To build objects in subdirs, we need to descend into the directories
 328 $(sort $(subdir-obj-y)): $(subdir-ym) ;
 329
 330 #
 331 # Rule to compile a set of .o files into one .o file
 332 #
 333 ifdef builtin-target
 334 quiet_cmd_link_o_target = LD      $@
 335 # If the list of objects to link is empty, just create an empty built-in.o
 336 cmd_link_o_target = $(if $(strip $(obj-y)),\
 337                       $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \
 338                       $(cmd_secanalysis),\
 339                       rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@)
 340
 341 $(builtin-target): $(obj-y) FORCE
 342         $(call if_changed,link_o_target)
 343
 344 targets += $(builtin-target)
 345 endif # builtin-target
 346
 347 #
 348 # Rule to create modules.order file
 349 #
 350 # Create commands to either record .ko file or cat modules.order from
 351 # a subdirectory
 352 modorder-cmds =                                         \
 353         $(foreach m, $(modorder),                       \
 354                 $(if $(filter %/modules.order, $m),     \
 355                         cat $m;, echo kernel/$m;))
 356
 357 $(modorder-target): $(subdir-ym) FORCE
 358         $(Q)(cat /dev/null; $(modorder-cmds)) > $@
 359
 360 #
 361 # Rule to compile a set of .o files into one .a file
 362 #
 363 ifdef lib-target
 364 quiet_cmd_link_l_target = AR      $@
 365 cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y)
 366
 367 $(lib-target): $(lib-y) FORCE
 368         $(call if_changed,link_l_target)
 369
 370 targets += $(lib-target)
 371 endif
 372
 373 #
 374 # Rule to link composite objects
 375 #
 376 #  Composite objects are specified in kbuild makefile as follows:
 377 #    <composite-object>-objs := <list of .o files>
 378 #  or
 379 #    <composite-object>-y    := <list of .o files>
 380 link_multi_deps =                     \
 381 $(filter $(addprefix $(obj)/,         \
 382 $($(subst $(obj)/,,$(@:.o=-objs)))    \
 383 $($(subst $(obj)/,,$(@:.o=-y)))), $^)
 384
 385 quiet_cmd_link_multi-y = LD      $@
 386 cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
 387
 388 quiet_cmd_link_multi-m = LD [M]  $@
 389 cmd_link_multi-m = $(cmd_link_multi-y)
 390
 391 $(multi-used-y): FORCE
 392         $(call if_changed,link_multi-y)
 393 $(call multi_depend, $(multi-used-y), .o, -objs -y)
 394
 395 $(multi-used-m): FORCE
 396         $(call if_changed,link_multi-m)
 397         @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
 398 $(call multi_depend, $(multi-used-m), .o, -objs -y)
 399
 400 targets += $(multi-used-y) $(multi-used-m)
 401
 402
 403 # Add intermediate targets:
 404 # When building objects with specific suffix patterns, add intermediate
 405 # targets that the final targets are derived from.
 406 intermediate_targets = $(foreach sfx, $(2), \
 407                                 $(patsubst %$(strip $(1)),%$(sfx), \
 408                                         $(filter %$(strip $(1)), $(targets))))
 409 # %.lex.o <- %.lex.c <- %.l
 410 # %.tab.o <- %.tab.[ch] <- %.y
 411 targets += $(call intermediate_targets, .lex.o, .lex.c) \
 412            $(call intermediate_targets, .tab.o, .tab.c .tab.h)
 413
 414 # Descending
 415 # ---------------------------------------------------------------------------
 416
 417 PHONY += $(subdir-ym)
 418 $(subdir-ym):
 419         $(Q)$(MAKE) $(build)=$@
 420
 421 # Add FORCE to the prequisites of a target to force it to be always rebuilt.
 422 # ---------------------------------------------------------------------------
 423
 424 PHONY += FORCE
 425
 426 FORCE:
 427
 428 # Read all saved command lines and dependencies for the $(targets) we
 429 # may be building above, using $(if_changed{,_dep}). As an
 430 # optimization, we don't need to read them if the target does not
 431 # exist, we will rebuild anyway in that case.
 432
 433 cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
 434
 435 ifneq ($(cmd_files),)
 436   include $(cmd_files)
 437 endif
 438
 439 # Create directories for object files if they do not exist
 440 obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
 441 $(shell mkdir -p $(obj-dirs))
 442
 443 .PHONY: $(PHONY)