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