1# ========================================================================== 2# Building 3# ========================================================================== 4# 5# SPDX-License-Identifier: GPL-2.0 6# 7 8# Modified for U-Boot 9prefix := tpl 10src := $(patsubst $(prefix)/%,%,$(obj)) 11ifeq ($(obj),$(src)) 12prefix := spl 13src := $(patsubst $(prefix)/%,%,$(obj)) 14ifeq ($(obj),$(src)) 15prefix := . 16endif 17endif 18 19PHONY := __build 20__build: 21 22# Init all relevant variables used in kbuild files so 23# 1) they have correct type 24# 2) they do not inherit any value from the environment 25obj-y := 26obj-m := 27lib-y := 28lib-m := 29always := 30targets := 31subdir-y := 32subdir-m := 33EXTRA_AFLAGS := 34EXTRA_CFLAGS := 35EXTRA_CPPFLAGS := 36EXTRA_LDFLAGS := 37asflags-y := 38ccflags-y := 39cppflags-y := 40ldflags-y := 41 42subdir-asflags-y := 43subdir-ccflags-y := 44 45# Read auto.conf if it exists, otherwise ignore 46# Modified for U-Boot 47-include include/config/auto.conf 48-include $(prefix)/include/autoconf.mk 49include scripts/Makefile.uncmd_spl 50 51include scripts/Kbuild.include 52 53# For backward compatibility check that these variables do not change 54save-cflags := $(CFLAGS) 55 56# The filename Kbuild has precedence over Makefile 57kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) 58kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) 59include $(kbuild-file) 60 61# Added for U-Boot 62asflags-y += $(PLATFORM_CPPFLAGS) 63ccflags-y += $(PLATFORM_CPPFLAGS) 64cppflags-y += $(PLATFORM_CPPFLAGS) 65 66# If the save-* variables changed error out 67ifeq ($(KBUILD_NOPEDANTIC),) 68 ifneq ("$(save-cflags)","$(CFLAGS)") 69 $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y) 70 endif 71endif 72 73include scripts/Makefile.lib 74 75ifdef host-progs 76ifneq ($(hostprogs-y),$(host-progs)) 77$(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) 78hostprogs-y += $(host-progs) 79endif 80endif 81 82# Do not include host rules unless needed 83ifneq ($(hostprogs-y)$(hostprogs-m),) 84include scripts/Makefile.host 85endif 86 87# Uncommented for U-Boot 88# We need to create output dicrectory for SPL and TPL even for in-tree build 89#ifneq ($(KBUILD_SRC),) 90# Create output directory if not already present 91_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) 92 93# Create directories for object files if directory does not exist 94# Needed when obj-y := dir/file.o syntax is used 95_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) 96#endif 97 98ifndef obj 99$(warning kbuild: Makefile.build is included improperly) 100endif 101 102# =========================================================================== 103 104ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) 105lib-target := $(obj)/lib.a 106endif 107 108ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),) 109builtin-target := $(obj)/built-in.o 110endif 111 112modorder-target := $(obj)/modules.order 113 114# We keep a list of all modules in $(MODVERDIR) 115 116__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ 117 $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ 118 $(subdir-ym) $(always) 119 @: 120 121# Linus' kernel sanity checking tool 122ifneq ($(KBUILD_CHECKSRC),0) 123 ifeq ($(KBUILD_CHECKSRC),2) 124 quiet_cmd_force_checksrc = CHECK $< 125 cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; 126 else 127 quiet_cmd_checksrc = CHECK $< 128 cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; 129 endif 130endif 131 132# Do section mismatch analysis for each module/built-in.o 133ifdef CONFIG_DEBUG_SECTION_MISMATCH 134 cmd_secanalysis = ; scripts/mod/modpost $@ 135endif 136 137# Compile C sources (.c) 138# --------------------------------------------------------------------------- 139 140# Default is built-in, unless we know otherwise 141modkern_cflags = \ 142 $(if $(part-of-module), \ 143 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ 144 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) 145quiet_modtag := $(empty) $(empty) 146 147$(real-objs-m) : part-of-module := y 148$(real-objs-m:.o=.i) : part-of-module := y 149$(real-objs-m:.o=.s) : part-of-module := y 150$(real-objs-m:.o=.lst): part-of-module := y 151 152$(real-objs-m) : quiet_modtag := [M] 153$(real-objs-m:.o=.i) : quiet_modtag := [M] 154$(real-objs-m:.o=.s) : quiet_modtag := [M] 155$(real-objs-m:.o=.lst): quiet_modtag := [M] 156 157$(obj-m) : quiet_modtag := [M] 158 159# Default for not multi-part modules 160modname = $(basetarget) 161 162$(multi-objs-m) : modname = $(modname-multi) 163$(multi-objs-m:.o=.i) : modname = $(modname-multi) 164$(multi-objs-m:.o=.s) : modname = $(modname-multi) 165$(multi-objs-m:.o=.lst) : modname = $(modname-multi) 166$(multi-objs-y) : modname = $(modname-multi) 167$(multi-objs-y:.o=.i) : modname = $(modname-multi) 168$(multi-objs-y:.o=.s) : modname = $(modname-multi) 169$(multi-objs-y:.o=.lst) : modname = $(modname-multi) 170 171quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ 172cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< 173 174$(obj)/%.s: $(src)/%.c FORCE 175 $(call if_changed_dep,cc_s_c) 176 177quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@ 178cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $< 179 180$(obj)/%.i: $(src)/%.c FORCE 181 $(call if_changed_dep,cc_i_c) 182 183cmd_gensymtypes = \ 184 $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ 185 $(GENKSYMS) $(if $(1), -T $(2)) \ 186 $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \ 187 $(if $(KBUILD_PRESERVE),-p) \ 188 -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) 189 190quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ 191cmd_cc_symtypes_c = \ 192 set -e; \ 193 $(call cmd_gensymtypes,true,$@) >/dev/null; \ 194 test -s $@ || rm -f $@ 195 196$(obj)/%.symtypes : $(src)/%.c FORCE 197 $(call cmd,cc_symtypes_c) 198 199# C (.c) files 200# The C file is compiled and updated dependency information is generated. 201# (See cmd_cc_o_c + relevant part of rule_cc_o_c) 202 203quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ 204 205ifndef CONFIG_MODVERSIONS 206cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 207 208else 209# When module versioning is enabled the following steps are executed: 210# o compile a .tmp_<file>.o from <file>.c 211# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does 212# not export symbols, we just rename .tmp_<file>.o to <file>.o and 213# are done. 214# o otherwise, we calculate symbol versions using the good old 215# genksyms on the preprocessed source and postprocess them in a way 216# that they are usable as a linker script 217# o generate <file>.o from .tmp_<file>.o using the linker to 218# replace the unresolved symbols __crc_exported_symbol with 219# the actual value of the checksum generated by genksyms 220 221cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< 222cmd_modversions = \ 223 if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ 224 $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ 225 > $(@D)/.tmp_$(@F:.o=.ver); \ 226 \ 227 $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ 228 -T $(@D)/.tmp_$(@F:.o=.ver); \ 229 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ 230 else \ 231 mv -f $(@D)/.tmp_$(@F) $@; \ 232 fi; 233endif 234 235ifdef CONFIG_FTRACE_MCOUNT_RECORD 236ifdef BUILD_C_RECORDMCOUNT 237ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") 238 RECORDMCOUNT_FLAGS = -w 239endif 240# Due to recursion, we must skip empty.o. 241# The empty.o file is created in the make process in order to determine 242# the target endianness and word size. It is made before all other C 243# files, including recordmcount. 244sub_cmd_record_mcount = \ 245 if [ $(@) != "scripts/mod/empty.o" ]; then \ 246 $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ 247 fi; 248recordmcount_source := $(srctree)/scripts/recordmcount.c \ 249 $(srctree)/scripts/recordmcount.h 250else 251sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ 252 "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ 253 "$(if $(CONFIG_64BIT),64,32)" \ 254 "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ 255 "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ 256 "$(if $(part-of-module),1,0)" "$(@)"; 257recordmcount_source := $(srctree)/scripts/recordmcount.pl 258endif 259cmd_record_mcount = \ 260 if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \ 261 "$(CC_FLAGS_FTRACE)" ]; then \ 262 $(sub_cmd_record_mcount) \ 263 fi; 264endif 265 266define rule_cc_o_c 267 $(call echo-cmd,checksrc) $(cmd_checksrc) \ 268 $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \ 269 $(cmd_modversions) \ 270 $(call echo-cmd,record_mcount) \ 271 $(cmd_record_mcount) \ 272 scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ 273 $(dot-target).tmp; \ 274 rm -f $(depfile); \ 275 mv -f $(dot-target).tmp $(dot-target).cmd 276endef 277 278# Built-in and composite module parts 279$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE 280 $(call cmd,force_checksrc) 281 $(call if_changed_rule,cc_o_c) 282 283# Single-part modules are special since we need to mark them in $(MODVERDIR) 284 285$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE 286 $(call cmd,force_checksrc) 287 $(call if_changed_rule,cc_o_c) 288 @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod) 289 290quiet_cmd_cc_lst_c = MKLST $@ 291 cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ 292 $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ 293 System.map $(OBJDUMP) > $@ 294 295$(obj)/%.lst: $(src)/%.c FORCE 296 $(call if_changed_dep,cc_lst_c) 297 298# Compile assembler sources (.S) 299# --------------------------------------------------------------------------- 300 301modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) 302 303$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) 304$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) 305 306quiet_cmd_as_s_S = CPP $(quiet_modtag) $@ 307cmd_as_s_S = $(CPP) $(a_flags) -o $@ $< 308 309$(obj)/%.s: $(src)/%.S FORCE 310 $(call if_changed_dep,as_s_S) 311 312quiet_cmd_as_o_S = AS $(quiet_modtag) $@ 313cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 314 315$(obj)/%.o: $(src)/%.S FORCE 316 $(call if_changed_dep,as_o_S) 317 318targets += $(real-objs-y) $(real-objs-m) $(lib-y) 319targets += $(extra-y) $(MAKECMDGOALS) $(always) 320 321# Linker scripts preprocessor (.lds.S -> .lds) 322# --------------------------------------------------------------------------- 323quiet_cmd_cpp_lds_S = LDS $@ 324 cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ 325 -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< 326 327$(obj)/%.lds: $(src)/%.lds.S FORCE 328 $(call if_changed_dep,cpp_lds_S) 329 330# ASN.1 grammar 331# --------------------------------------------------------------------------- 332quiet_cmd_asn1_compiler = ASN.1 $@ 333 cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ 334 $(subst .h,.c,$@) $(subst .c,.h,$@) 335 336.PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h 337 338$(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler 339 $(call cmd,asn1_compiler) 340 341# Build the compiled-in targets 342# --------------------------------------------------------------------------- 343 344# To build objects in subdirs, we need to descend into the directories 345$(sort $(subdir-obj-y)): $(subdir-ym) ; 346 347# 348# Rule to compile a set of .o files into one .o file 349# 350ifdef builtin-target 351quiet_cmd_link_o_target = LD $@ 352# If the list of objects to link is empty, just create an empty built-in.o 353cmd_link_o_target = $(if $(strip $(obj-y)),\ 354 $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \ 355 $(cmd_secanalysis),\ 356 rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@) 357 358$(builtin-target): $(obj-y) FORCE 359 $(call if_changed,link_o_target) 360 361targets += $(builtin-target) 362endif # builtin-target 363 364# 365# Rule to create modules.order file 366# 367# Create commands to either record .ko file or cat modules.order from 368# a subdirectory 369modorder-cmds = \ 370 $(foreach m, $(modorder), \ 371 $(if $(filter %/modules.order, $m), \ 372 cat $m;, echo kernel/$m;)) 373 374$(modorder-target): $(subdir-ym) FORCE 375 $(Q)(cat /dev/null; $(modorder-cmds)) > $@ 376 377# 378# Rule to compile a set of .o files into one .a file 379# 380ifdef lib-target 381quiet_cmd_link_l_target = AR $@ 382cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y) 383 384$(lib-target): $(lib-y) FORCE 385 $(call if_changed,link_l_target) 386 387targets += $(lib-target) 388endif 389 390# 391# Rule to link composite objects 392# 393# Composite objects are specified in kbuild makefile as follows: 394# <composite-object>-objs := <list of .o files> 395# or 396# <composite-object>-y := <list of .o files> 397link_multi_deps = \ 398$(filter $(addprefix $(obj)/, \ 399$($(subst $(obj)/,,$(@:.o=-objs))) \ 400$($(subst $(obj)/,,$(@:.o=-y)))), $^) 401 402quiet_cmd_link_multi-y = LD $@ 403cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) 404 405quiet_cmd_link_multi-m = LD [M] $@ 406cmd_link_multi-m = $(cmd_link_multi-y) 407 408$(multi-used-y): FORCE 409 $(call if_changed,link_multi-y) 410$(call multi_depend, $(multi-used-y), .o, -objs -y) 411 412$(multi-used-m): FORCE 413 $(call if_changed,link_multi-m) 414 @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod) 415$(call multi_depend, $(multi-used-m), .o, -objs -y) 416 417targets += $(multi-used-y) $(multi-used-m) 418 419 420# Descending 421# --------------------------------------------------------------------------- 422 423PHONY += $(subdir-ym) 424$(subdir-ym): 425 $(Q)$(MAKE) $(build)=$@ 426 427# Add FORCE to the prequisites of a target to force it to be always rebuilt. 428# --------------------------------------------------------------------------- 429 430PHONY += FORCE 431 432FORCE: 433 434# Read all saved command lines and dependencies for the $(targets) we 435# may be building above, using $(if_changed{,_dep}). As an 436# optimization, we don't need to read them if the target does not 437# exist, we will rebuild anyway in that case. 438 439targets := $(wildcard $(sort $(targets))) 440cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 441 442ifneq ($(cmd_files),) 443 include $(cmd_files) 444endif 445 446# Declare the contents of the .PHONY variable as phony. We keep that 447# information in a variable se we can use it in if_changed and friends. 448 449.PHONY: $(PHONY) 450