1# SPDX-License-Identifier: GPL-2.0 2# ========================================================================== 3# Building 4# ========================================================================== 5 6# Modified for U-Boot 7prefix := tpl 8src := $(patsubst $(prefix)/%,%,$(obj)) 9ifeq ($(obj),$(src)) 10prefix := spl 11src := $(patsubst $(prefix)/%,%,$(obj)) 12ifeq ($(obj),$(src)) 13prefix := . 14endif 15endif 16 17PHONY := __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 23obj-y := 24obj-m := 25lib-y := 26lib-m := 27always := 28targets := 29subdir-y := 30subdir-m := 31EXTRA_AFLAGS := 32EXTRA_CFLAGS := 33EXTRA_CPPFLAGS := 34EXTRA_LDFLAGS := 35asflags-y := 36ccflags-y := 37cppflags-y := 38ldflags-y := 39 40subdir-asflags-y := 41subdir-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 47include scripts/Makefile.uncmd_spl 48 49include scripts/Kbuild.include 50 51# For backward compatibility check that these variables do not change 52save-cflags := $(CFLAGS) 53 54# The filename Kbuild has precedence over Makefile 55kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) 56kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) 57include $(kbuild-file) 58 59# Added for U-Boot 60asflags-y += $(PLATFORM_CPPFLAGS) 61ccflags-y += $(PLATFORM_CPPFLAGS) 62cppflags-y += $(PLATFORM_CPPFLAGS) 63 64# If the save-* variables changed error out 65ifeq ($(KBUILD_NOPEDANTIC),) 66 ifneq ("$(save-cflags)","$(CFLAGS)") 67 $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y) 68 endif 69endif 70 71include scripts/Makefile.lib 72 73ifdef host-progs 74ifneq ($(hostprogs-y),$(host-progs)) 75$(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) 76hostprogs-y += $(host-progs) 77endif 78endif 79 80# Do not include host rules unless needed 81ifneq ($(hostprogs-y)$(hostprogs-m),) 82include scripts/Makefile.host 83endif 84 85# Uncommented for U-Boot 86# We need to create output dicrectory for SPL and TPL even for in-tree build 87#ifneq ($(KBUILD_SRC),) 88# Create output directory if not already present 89_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) 90 91# Create directories for object files if directory does not exist 92# Needed when obj-y := dir/file.o syntax is used 93_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) 94#endif 95 96ifndef obj 97$(warning kbuild: Makefile.build is included improperly) 98endif 99 100# =========================================================================== 101 102ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) 103lib-target := $(obj)/lib.a 104endif 105 106ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),) 107builtin-target := $(obj)/built-in.o 108endif 109 110modorder-target := $(obj)/modules.order 111 112# We keep a list of all modules in $(MODVERDIR) 113 114__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ 115 $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ 116 $(subdir-ym) $(always) 117 @: 118 119# Linus' kernel sanity checking tool 120ifneq ($(KBUILD_CHECKSRC),0) 121 ifeq ($(KBUILD_CHECKSRC),2) 122 quiet_cmd_force_checksrc = CHECK $< 123 cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; 124 else 125 quiet_cmd_checksrc = CHECK $< 126 cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; 127 endif 128endif 129 130# Do section mismatch analysis for each module/built-in.o 131ifdef CONFIG_DEBUG_SECTION_MISMATCH 132 cmd_secanalysis = ; scripts/mod/modpost $@ 133endif 134 135# Compile C sources (.c) 136# --------------------------------------------------------------------------- 137 138# Default is built-in, unless we know otherwise 139modkern_cflags = \ 140 $(if $(part-of-module), \ 141 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ 142 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) 143quiet_modtag := $(empty) $(empty) 144 145$(real-objs-m) : part-of-module := y 146$(real-objs-m:.o=.i) : part-of-module := y 147$(real-objs-m:.o=.s) : part-of-module := y 148$(real-objs-m:.o=.lst): part-of-module := y 149 150$(real-objs-m) : quiet_modtag := [M] 151$(real-objs-m:.o=.i) : quiet_modtag := [M] 152$(real-objs-m:.o=.s) : quiet_modtag := [M] 153$(real-objs-m:.o=.lst): quiet_modtag := [M] 154 155$(obj-m) : quiet_modtag := [M] 156 157# Default for not multi-part modules 158modname = $(basetarget) 159 160$(multi-objs-m) : modname = $(modname-multi) 161$(multi-objs-m:.o=.i) : modname = $(modname-multi) 162$(multi-objs-m:.o=.s) : modname = $(modname-multi) 163$(multi-objs-m:.o=.lst) : modname = $(modname-multi) 164$(multi-objs-y) : modname = $(modname-multi) 165$(multi-objs-y:.o=.i) : modname = $(modname-multi) 166$(multi-objs-y:.o=.s) : modname = $(modname-multi) 167$(multi-objs-y:.o=.lst) : modname = $(modname-multi) 168 169quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ 170cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< 171 172$(obj)/%.s: $(src)/%.c FORCE 173 $(call if_changed_dep,cc_s_c) 174 175quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@ 176cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $< 177 178$(obj)/%.i: $(src)/%.c FORCE 179 $(call if_changed_dep,cc_i_c) 180 181cmd_gensymtypes = \ 182 $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ 183 $(GENKSYMS) $(if $(1), -T $(2)) \ 184 $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \ 185 $(if $(KBUILD_PRESERVE),-p) \ 186 -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) 187 188quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ 189cmd_cc_symtypes_c = \ 190 set -e; \ 191 $(call cmd_gensymtypes,true,$@) >/dev/null; \ 192 test -s $@ || rm -f $@ 193 194$(obj)/%.symtypes : $(src)/%.c FORCE 195 $(call cmd,cc_symtypes_c) 196 197# C (.c) files 198# The C file is compiled and updated dependency information is generated. 199# (See cmd_cc_o_c + relevant part of rule_cc_o_c) 200 201quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ 202 203ifndef CONFIG_MODVERSIONS 204cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 205 206else 207# When module versioning is enabled the following steps are executed: 208# o compile a .tmp_<file>.o from <file>.c 209# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does 210# not export symbols, we just rename .tmp_<file>.o to <file>.o and 211# are done. 212# o otherwise, we calculate symbol versions using the good old 213# genksyms on the preprocessed source and postprocess them in a way 214# that they are usable as a linker script 215# o generate <file>.o from .tmp_<file>.o using the linker to 216# replace the unresolved symbols __crc_exported_symbol with 217# the actual value of the checksum generated by genksyms 218 219cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< 220cmd_modversions = \ 221 if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ 222 $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ 223 > $(@D)/.tmp_$(@F:.o=.ver); \ 224 \ 225 $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ 226 -T $(@D)/.tmp_$(@F:.o=.ver); \ 227 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ 228 else \ 229 mv -f $(@D)/.tmp_$(@F) $@; \ 230 fi; 231endif 232 233ifdef CONFIG_FTRACE_MCOUNT_RECORD 234ifdef BUILD_C_RECORDMCOUNT 235ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") 236 RECORDMCOUNT_FLAGS = -w 237endif 238# Due to recursion, we must skip empty.o. 239# The empty.o file is created in the make process in order to determine 240# the target endianness and word size. It is made before all other C 241# files, including recordmcount. 242sub_cmd_record_mcount = \ 243 if [ $(@) != "scripts/mod/empty.o" ]; then \ 244 $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ 245 fi; 246recordmcount_source := $(srctree)/scripts/recordmcount.c \ 247 $(srctree)/scripts/recordmcount.h 248else 249sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ 250 "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ 251 "$(if $(CONFIG_64BIT),64,32)" \ 252 "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ 253 "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ 254 "$(if $(part-of-module),1,0)" "$(@)"; 255recordmcount_source := $(srctree)/scripts/recordmcount.pl 256endif 257cmd_record_mcount = \ 258 if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \ 259 "$(CC_FLAGS_FTRACE)" ]; then \ 260 $(sub_cmd_record_mcount) \ 261 fi; 262endif 263 264define rule_cc_o_c 265 $(call echo-cmd,checksrc) $(cmd_checksrc) \ 266 $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \ 267 $(cmd_modversions) \ 268 $(call echo-cmd,record_mcount) \ 269 $(cmd_record_mcount) \ 270 scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ 271 $(dot-target).tmp; \ 272 rm -f $(depfile); \ 273 mv -f $(dot-target).tmp $(dot-target).cmd 274endef 275 276# Built-in and composite module parts 277$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE 278 $(call cmd,force_checksrc) 279 $(call if_changed_rule,cc_o_c) 280 281# Single-part modules are special since we need to mark them in $(MODVERDIR) 282 283$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE 284 $(call cmd,force_checksrc) 285 $(call if_changed_rule,cc_o_c) 286 @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod) 287 288quiet_cmd_cc_lst_c = MKLST $@ 289 cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ 290 $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ 291 System.map $(OBJDUMP) > $@ 292 293$(obj)/%.lst: $(src)/%.c FORCE 294 $(call if_changed_dep,cc_lst_c) 295 296# Compile assembler sources (.S) 297# --------------------------------------------------------------------------- 298 299modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) 300 301$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) 302$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) 303 304quiet_cmd_as_s_S = CPP $(quiet_modtag) $@ 305cmd_as_s_S = $(CPP) $(a_flags) -o $@ $< 306 307$(obj)/%.s: $(src)/%.S FORCE 308 $(call if_changed_dep,as_s_S) 309 310quiet_cmd_as_o_S = AS $(quiet_modtag) $@ 311cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 312 313$(obj)/%.o: $(src)/%.S FORCE 314 $(call if_changed_dep,as_o_S) 315 316targets += $(real-objs-y) $(real-objs-m) $(lib-y) 317targets += $(extra-y) $(MAKECMDGOALS) $(always) 318 319# Linker scripts preprocessor (.lds.S -> .lds) 320# --------------------------------------------------------------------------- 321quiet_cmd_cpp_lds_S = LDS $@ 322 cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ 323 -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< 324 325$(obj)/%.lds: $(src)/%.lds.S FORCE 326 $(call if_changed_dep,cpp_lds_S) 327 328# ASN.1 grammar 329# --------------------------------------------------------------------------- 330quiet_cmd_asn1_compiler = ASN.1 $@ 331 cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ 332 $(subst .h,.c,$@) $(subst .c,.h,$@) 333 334.PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h 335 336$(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler 337 $(call cmd,asn1_compiler) 338 339# Build the compiled-in targets 340# --------------------------------------------------------------------------- 341 342# To build objects in subdirs, we need to descend into the directories 343$(sort $(subdir-obj-y)): $(subdir-ym) ; 344 345# 346# Rule to compile a set of .o files into one .o file 347# 348ifdef builtin-target 349quiet_cmd_link_o_target = LD $@ 350# If the list of objects to link is empty, just create an empty built-in.o 351cmd_link_o_target = $(if $(strip $(obj-y)),\ 352 $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \ 353 $(cmd_secanalysis),\ 354 rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@) 355 356$(builtin-target): $(obj-y) FORCE 357 $(call if_changed,link_o_target) 358 359targets += $(builtin-target) 360endif # builtin-target 361 362# 363# Rule to create modules.order file 364# 365# Create commands to either record .ko file or cat modules.order from 366# a subdirectory 367modorder-cmds = \ 368 $(foreach m, $(modorder), \ 369 $(if $(filter %/modules.order, $m), \ 370 cat $m;, echo kernel/$m;)) 371 372$(modorder-target): $(subdir-ym) FORCE 373 $(Q)(cat /dev/null; $(modorder-cmds)) > $@ 374 375# 376# Rule to compile a set of .o files into one .a file 377# 378ifdef lib-target 379quiet_cmd_link_l_target = AR $@ 380cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y) 381 382$(lib-target): $(lib-y) FORCE 383 $(call if_changed,link_l_target) 384 385targets += $(lib-target) 386endif 387 388# 389# Rule to link composite objects 390# 391# Composite objects are specified in kbuild makefile as follows: 392# <composite-object>-objs := <list of .o files> 393# or 394# <composite-object>-y := <list of .o files> 395link_multi_deps = \ 396$(filter $(addprefix $(obj)/, \ 397$($(subst $(obj)/,,$(@:.o=-objs))) \ 398$($(subst $(obj)/,,$(@:.o=-y)))), $^) 399 400quiet_cmd_link_multi-y = LD $@ 401cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) 402 403quiet_cmd_link_multi-m = LD [M] $@ 404cmd_link_multi-m = $(cmd_link_multi-y) 405 406$(multi-used-y): FORCE 407 $(call if_changed,link_multi-y) 408$(call multi_depend, $(multi-used-y), .o, -objs -y) 409 410$(multi-used-m): FORCE 411 $(call if_changed,link_multi-m) 412 @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod) 413$(call multi_depend, $(multi-used-m), .o, -objs -y) 414 415targets += $(multi-used-y) $(multi-used-m) 416 417 418# Add intermediate targets: 419# When building objects with specific suffix patterns, add intermediate 420# targets that the final targets are derived from. 421intermediate_targets = $(foreach sfx, $(2), \ 422 $(patsubst %$(strip $(1)),%$(sfx), \ 423 $(filter %$(strip $(1)), $(targets)))) 424# %.lex.o <- %.lex.c <- %.l 425# %.tab.o <- %.tab.[ch] <- %.y 426targets += $(call intermediate_targets, .lex.o, .lex.c) \ 427 $(call intermediate_targets, .tab.o, .tab.c .tab.h) 428 429# Descending 430# --------------------------------------------------------------------------- 431 432PHONY += $(subdir-ym) 433$(subdir-ym): 434 $(Q)$(MAKE) $(build)=$@ 435 436# Add FORCE to the prequisites of a target to force it to be always rebuilt. 437# --------------------------------------------------------------------------- 438 439PHONY += FORCE 440 441FORCE: 442 443# Read all saved command lines and dependencies for the $(targets) we 444# may be building above, using $(if_changed{,_dep}). As an 445# optimization, we don't need to read them if the target does not 446# exist, we will rebuild anyway in that case. 447 448targets := $(wildcard $(sort $(targets))) 449cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 450 451ifneq ($(cmd_files),) 452 include $(cmd_files) 453endif 454 455# Declare the contents of the .PHONY variable as phony. We keep that 456# information in a variable se we can use it in if_changed and friends. 457 458.PHONY: $(PHONY) 459