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