scripts/Makefile.build

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