1*22433fc5SMasahiro Yamada# ========================================================================== 2*22433fc5SMasahiro Yamada# Building 3*22433fc5SMasahiro Yamada# ========================================================================== 4*22433fc5SMasahiro Yamada 5*22433fc5SMasahiro Yamadasrc := $(obj) 6*22433fc5SMasahiro Yamada 7*22433fc5SMasahiro YamadaPHONY := __build 8*22433fc5SMasahiro Yamada__build: 9*22433fc5SMasahiro Yamada 10*22433fc5SMasahiro Yamada# Init all relevant variables used in kbuild files so 11*22433fc5SMasahiro Yamada# 1) they have correct type 12*22433fc5SMasahiro Yamada# 2) they do not inherit any value from the environment 13*22433fc5SMasahiro Yamadaobj-y := 14*22433fc5SMasahiro Yamadaobj-m := 15*22433fc5SMasahiro Yamadalib-y := 16*22433fc5SMasahiro Yamadalib-m := 17*22433fc5SMasahiro Yamadaalways := 18*22433fc5SMasahiro Yamadatargets := 19*22433fc5SMasahiro Yamadasubdir-y := 20*22433fc5SMasahiro Yamadasubdir-m := 21*22433fc5SMasahiro YamadaEXTRA_AFLAGS := 22*22433fc5SMasahiro YamadaEXTRA_CFLAGS := 23*22433fc5SMasahiro YamadaEXTRA_CPPFLAGS := 24*22433fc5SMasahiro YamadaEXTRA_LDFLAGS := 25*22433fc5SMasahiro Yamadaasflags-y := 26*22433fc5SMasahiro Yamadaccflags-y := 27*22433fc5SMasahiro Yamadacppflags-y := 28*22433fc5SMasahiro Yamadaldflags-y := 29*22433fc5SMasahiro Yamada 30*22433fc5SMasahiro Yamadasubdir-asflags-y := 31*22433fc5SMasahiro Yamadasubdir-ccflags-y := 32*22433fc5SMasahiro Yamada 33*22433fc5SMasahiro Yamada# Read auto.conf if it exists, otherwise ignore 34*22433fc5SMasahiro Yamada-include include/config/auto.conf 35*22433fc5SMasahiro Yamada 36*22433fc5SMasahiro Yamadainclude scripts/Kbuild.include 37*22433fc5SMasahiro Yamada 38*22433fc5SMasahiro Yamada# For backward compatibility check that these variables do not change 39*22433fc5SMasahiro Yamadasave-cflags := $(CFLAGS) 40*22433fc5SMasahiro Yamada 41*22433fc5SMasahiro Yamada# The filename Kbuild has precedence over Makefile 42*22433fc5SMasahiro Yamadakbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) 43*22433fc5SMasahiro Yamadakbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) 44*22433fc5SMasahiro Yamadainclude $(kbuild-file) 45*22433fc5SMasahiro Yamada 46*22433fc5SMasahiro Yamada# If the save-* variables changed error out 47*22433fc5SMasahiro Yamadaifeq ($(KBUILD_NOPEDANTIC),) 48*22433fc5SMasahiro Yamada ifneq ("$(save-cflags)","$(CFLAGS)") 49*22433fc5SMasahiro Yamada $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y) 50*22433fc5SMasahiro Yamada endif 51*22433fc5SMasahiro Yamadaendif 52*22433fc5SMasahiro Yamada 53*22433fc5SMasahiro Yamada# 54*22433fc5SMasahiro Yamada# make W=... settings 55*22433fc5SMasahiro Yamada# 56*22433fc5SMasahiro Yamada# W=1 - warnings that may be relevant and does not occur too often 57*22433fc5SMasahiro Yamada# W=2 - warnings that occur quite often but may still be relevant 58*22433fc5SMasahiro Yamada# W=3 - the more obscure warnings, can most likely be ignored 59*22433fc5SMasahiro Yamada# 60*22433fc5SMasahiro Yamada# $(call cc-option, -W...) handles gcc -W.. options which 61*22433fc5SMasahiro Yamada# are not supported by all versions of the compiler 62*22433fc5SMasahiro Yamadaifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS 63*22433fc5SMasahiro Yamadawarning- := $(empty) 64*22433fc5SMasahiro Yamada 65*22433fc5SMasahiro Yamadawarning-1 := -Wextra -Wunused -Wno-unused-parameter 66*22433fc5SMasahiro Yamadawarning-1 += -Wmissing-declarations 67*22433fc5SMasahiro Yamadawarning-1 += -Wmissing-format-attribute 68*22433fc5SMasahiro Yamadawarning-1 += -Wmissing-prototypes 69*22433fc5SMasahiro Yamadawarning-1 += -Wold-style-definition 70*22433fc5SMasahiro Yamadawarning-1 += $(call cc-option, -Wmissing-include-dirs) 71*22433fc5SMasahiro Yamadawarning-1 += $(call cc-option, -Wunused-but-set-variable) 72*22433fc5SMasahiro Yamadawarning-1 += $(call cc-disable-warning, missing-field-initializers) 73*22433fc5SMasahiro Yamada 74*22433fc5SMasahiro Yamadawarning-2 := -Waggregate-return 75*22433fc5SMasahiro Yamadawarning-2 += -Wcast-align 76*22433fc5SMasahiro Yamadawarning-2 += -Wdisabled-optimization 77*22433fc5SMasahiro Yamadawarning-2 += -Wnested-externs 78*22433fc5SMasahiro Yamadawarning-2 += -Wshadow 79*22433fc5SMasahiro Yamadawarning-2 += $(call cc-option, -Wlogical-op) 80*22433fc5SMasahiro Yamadawarning-2 += $(call cc-option, -Wmissing-field-initializers) 81*22433fc5SMasahiro Yamada 82*22433fc5SMasahiro Yamadawarning-3 := -Wbad-function-cast 83*22433fc5SMasahiro Yamadawarning-3 += -Wcast-qual 84*22433fc5SMasahiro Yamadawarning-3 += -Wconversion 85*22433fc5SMasahiro Yamadawarning-3 += -Wpacked 86*22433fc5SMasahiro Yamadawarning-3 += -Wpadded 87*22433fc5SMasahiro Yamadawarning-3 += -Wpointer-arith 88*22433fc5SMasahiro Yamadawarning-3 += -Wredundant-decls 89*22433fc5SMasahiro Yamadawarning-3 += -Wswitch-default 90*22433fc5SMasahiro Yamadawarning-3 += $(call cc-option, -Wpacked-bitfield-compat) 91*22433fc5SMasahiro Yamadawarning-3 += $(call cc-option, -Wvla) 92*22433fc5SMasahiro Yamada 93*22433fc5SMasahiro Yamadawarning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) 94*22433fc5SMasahiro Yamadawarning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) 95*22433fc5SMasahiro Yamadawarning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) 96*22433fc5SMasahiro Yamada 97*22433fc5SMasahiro Yamadaifeq ("$(strip $(warning))","") 98*22433fc5SMasahiro Yamada $(error W=$(KBUILD_ENABLE_EXTRA_GCC_CHECKS) is unknown) 99*22433fc5SMasahiro Yamadaendif 100*22433fc5SMasahiro Yamada 101*22433fc5SMasahiro YamadaKBUILD_CFLAGS += $(warning) 102*22433fc5SMasahiro Yamadaendif 103*22433fc5SMasahiro Yamada 104*22433fc5SMasahiro Yamadainclude scripts/Makefile.lib 105*22433fc5SMasahiro Yamada 106*22433fc5SMasahiro Yamadaifdef host-progs 107*22433fc5SMasahiro Yamadaifneq ($(hostprogs-y),$(host-progs)) 108*22433fc5SMasahiro Yamada$(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) 109*22433fc5SMasahiro Yamadahostprogs-y += $(host-progs) 110*22433fc5SMasahiro Yamadaendif 111*22433fc5SMasahiro Yamadaendif 112*22433fc5SMasahiro Yamada 113*22433fc5SMasahiro Yamada# Do not include host rules unless needed 114*22433fc5SMasahiro Yamadaifneq ($(hostprogs-y)$(hostprogs-m),) 115*22433fc5SMasahiro Yamadainclude scripts/Makefile.host 116*22433fc5SMasahiro Yamadaendif 117*22433fc5SMasahiro Yamada 118*22433fc5SMasahiro Yamadaifneq ($(KBUILD_SRC),) 119*22433fc5SMasahiro Yamada# Create output directory if not already present 120*22433fc5SMasahiro Yamada_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) 121*22433fc5SMasahiro Yamada 122*22433fc5SMasahiro Yamada# Create directories for object files if directory does not exist 123*22433fc5SMasahiro Yamada# Needed when obj-y := dir/file.o syntax is used 124*22433fc5SMasahiro Yamada_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) 125*22433fc5SMasahiro Yamadaendif 126*22433fc5SMasahiro Yamada 127*22433fc5SMasahiro Yamadaifndef obj 128*22433fc5SMasahiro Yamada$(warning kbuild: Makefile.build is included improperly) 129*22433fc5SMasahiro Yamadaendif 130*22433fc5SMasahiro Yamada 131*22433fc5SMasahiro Yamada# =========================================================================== 132*22433fc5SMasahiro Yamada 133*22433fc5SMasahiro Yamadaifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),) 134*22433fc5SMasahiro Yamadalib-target := $(obj)/lib.a 135*22433fc5SMasahiro Yamadaendif 136*22433fc5SMasahiro Yamada 137*22433fc5SMasahiro Yamadaifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(subdir-m) $(lib-target)),) 138*22433fc5SMasahiro Yamadabuiltin-target := $(obj)/built-in.o 139*22433fc5SMasahiro Yamadaendif 140*22433fc5SMasahiro Yamada 141*22433fc5SMasahiro Yamadamodorder-target := $(obj)/modules.order 142*22433fc5SMasahiro Yamada 143*22433fc5SMasahiro Yamada# We keep a list of all modules in $(MODVERDIR) 144*22433fc5SMasahiro Yamada 145*22433fc5SMasahiro Yamada__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ 146*22433fc5SMasahiro Yamada $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ 147*22433fc5SMasahiro Yamada $(subdir-ym) $(always) 148*22433fc5SMasahiro Yamada @: 149*22433fc5SMasahiro Yamada 150*22433fc5SMasahiro Yamada# Linus' kernel sanity checking tool 151*22433fc5SMasahiro Yamadaifneq ($(KBUILD_CHECKSRC),0) 152*22433fc5SMasahiro Yamada ifeq ($(KBUILD_CHECKSRC),2) 153*22433fc5SMasahiro Yamada quiet_cmd_force_checksrc = CHECK $< 154*22433fc5SMasahiro Yamada cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; 155*22433fc5SMasahiro Yamada else 156*22433fc5SMasahiro Yamada quiet_cmd_checksrc = CHECK $< 157*22433fc5SMasahiro Yamada cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; 158*22433fc5SMasahiro Yamada endif 159*22433fc5SMasahiro Yamadaendif 160*22433fc5SMasahiro Yamada 161*22433fc5SMasahiro Yamada# Do section mismatch analysis for each module/built-in.o 162*22433fc5SMasahiro Yamadaifdef CONFIG_DEBUG_SECTION_MISMATCH 163*22433fc5SMasahiro Yamada cmd_secanalysis = ; scripts/mod/modpost $@ 164*22433fc5SMasahiro Yamadaendif 165*22433fc5SMasahiro Yamada 166*22433fc5SMasahiro Yamada# Compile C sources (.c) 167*22433fc5SMasahiro Yamada# --------------------------------------------------------------------------- 168*22433fc5SMasahiro Yamada 169*22433fc5SMasahiro Yamada# Default is built-in, unless we know otherwise 170*22433fc5SMasahiro Yamadamodkern_cflags = \ 171*22433fc5SMasahiro Yamada $(if $(part-of-module), \ 172*22433fc5SMasahiro Yamada $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ 173*22433fc5SMasahiro Yamada $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) 174*22433fc5SMasahiro Yamadaquiet_modtag := $(empty) $(empty) 175*22433fc5SMasahiro Yamada 176*22433fc5SMasahiro Yamada$(real-objs-m) : part-of-module := y 177*22433fc5SMasahiro Yamada$(real-objs-m:.o=.i) : part-of-module := y 178*22433fc5SMasahiro Yamada$(real-objs-m:.o=.s) : part-of-module := y 179*22433fc5SMasahiro Yamada$(real-objs-m:.o=.lst): part-of-module := y 180*22433fc5SMasahiro Yamada 181*22433fc5SMasahiro Yamada$(real-objs-m) : quiet_modtag := [M] 182*22433fc5SMasahiro Yamada$(real-objs-m:.o=.i) : quiet_modtag := [M] 183*22433fc5SMasahiro Yamada$(real-objs-m:.o=.s) : quiet_modtag := [M] 184*22433fc5SMasahiro Yamada$(real-objs-m:.o=.lst): quiet_modtag := [M] 185*22433fc5SMasahiro Yamada 186*22433fc5SMasahiro Yamada$(obj-m) : quiet_modtag := [M] 187*22433fc5SMasahiro Yamada 188*22433fc5SMasahiro Yamada# Default for not multi-part modules 189*22433fc5SMasahiro Yamadamodname = $(basetarget) 190*22433fc5SMasahiro Yamada 191*22433fc5SMasahiro Yamada$(multi-objs-m) : modname = $(modname-multi) 192*22433fc5SMasahiro Yamada$(multi-objs-m:.o=.i) : modname = $(modname-multi) 193*22433fc5SMasahiro Yamada$(multi-objs-m:.o=.s) : modname = $(modname-multi) 194*22433fc5SMasahiro Yamada$(multi-objs-m:.o=.lst) : modname = $(modname-multi) 195*22433fc5SMasahiro Yamada$(multi-objs-y) : modname = $(modname-multi) 196*22433fc5SMasahiro Yamada$(multi-objs-y:.o=.i) : modname = $(modname-multi) 197*22433fc5SMasahiro Yamada$(multi-objs-y:.o=.s) : modname = $(modname-multi) 198*22433fc5SMasahiro Yamada$(multi-objs-y:.o=.lst) : modname = $(modname-multi) 199*22433fc5SMasahiro Yamada 200*22433fc5SMasahiro Yamadaquiet_cmd_cc_s_c = CC $(quiet_modtag) $@ 201*22433fc5SMasahiro Yamadacmd_cc_s_c = $(CC) $(c_flags) -fverbose-asm -S -o $@ $< 202*22433fc5SMasahiro Yamada 203*22433fc5SMasahiro Yamada$(obj)/%.s: $(src)/%.c FORCE 204*22433fc5SMasahiro Yamada $(call if_changed_dep,cc_s_c) 205*22433fc5SMasahiro Yamada 206*22433fc5SMasahiro Yamadaquiet_cmd_cc_i_c = CPP $(quiet_modtag) $@ 207*22433fc5SMasahiro Yamadacmd_cc_i_c = $(CPP) $(c_flags) -o $@ $< 208*22433fc5SMasahiro Yamada 209*22433fc5SMasahiro Yamada$(obj)/%.i: $(src)/%.c FORCE 210*22433fc5SMasahiro Yamada $(call if_changed_dep,cc_i_c) 211*22433fc5SMasahiro Yamada 212*22433fc5SMasahiro Yamadacmd_gensymtypes = \ 213*22433fc5SMasahiro Yamada $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ 214*22433fc5SMasahiro Yamada $(GENKSYMS) $(if $(1), -T $(2)) \ 215*22433fc5SMasahiro Yamada $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \ 216*22433fc5SMasahiro Yamada $(if $(KBUILD_PRESERVE),-p) \ 217*22433fc5SMasahiro Yamada -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) 218*22433fc5SMasahiro Yamada 219*22433fc5SMasahiro Yamadaquiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ 220*22433fc5SMasahiro Yamadacmd_cc_symtypes_c = \ 221*22433fc5SMasahiro Yamada set -e; \ 222*22433fc5SMasahiro Yamada $(call cmd_gensymtypes,true,$@) >/dev/null; \ 223*22433fc5SMasahiro Yamada test -s $@ || rm -f $@ 224*22433fc5SMasahiro Yamada 225*22433fc5SMasahiro Yamada$(obj)/%.symtypes : $(src)/%.c FORCE 226*22433fc5SMasahiro Yamada $(call cmd,cc_symtypes_c) 227*22433fc5SMasahiro Yamada 228*22433fc5SMasahiro Yamada# C (.c) files 229*22433fc5SMasahiro Yamada# The C file is compiled and updated dependency information is generated. 230*22433fc5SMasahiro Yamada# (See cmd_cc_o_c + relevant part of rule_cc_o_c) 231*22433fc5SMasahiro Yamada 232*22433fc5SMasahiro Yamadaquiet_cmd_cc_o_c = CC $(quiet_modtag) $@ 233*22433fc5SMasahiro Yamada 234*22433fc5SMasahiro Yamadaifndef CONFIG_MODVERSIONS 235*22433fc5SMasahiro Yamadacmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 236*22433fc5SMasahiro Yamada 237*22433fc5SMasahiro Yamadaelse 238*22433fc5SMasahiro Yamada# When module versioning is enabled the following steps are executed: 239*22433fc5SMasahiro Yamada# o compile a .tmp_<file>.o from <file>.c 240*22433fc5SMasahiro Yamada# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does 241*22433fc5SMasahiro Yamada# not export symbols, we just rename .tmp_<file>.o to <file>.o and 242*22433fc5SMasahiro Yamada# are done. 243*22433fc5SMasahiro Yamada# o otherwise, we calculate symbol versions using the good old 244*22433fc5SMasahiro Yamada# genksyms on the preprocessed source and postprocess them in a way 245*22433fc5SMasahiro Yamada# that they are usable as a linker script 246*22433fc5SMasahiro Yamada# o generate <file>.o from .tmp_<file>.o using the linker to 247*22433fc5SMasahiro Yamada# replace the unresolved symbols __crc_exported_symbol with 248*22433fc5SMasahiro Yamada# the actual value of the checksum generated by genksyms 249*22433fc5SMasahiro Yamada 250*22433fc5SMasahiro Yamadacmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< 251*22433fc5SMasahiro Yamadacmd_modversions = \ 252*22433fc5SMasahiro Yamada if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ 253*22433fc5SMasahiro Yamada $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ 254*22433fc5SMasahiro Yamada > $(@D)/.tmp_$(@F:.o=.ver); \ 255*22433fc5SMasahiro Yamada \ 256*22433fc5SMasahiro Yamada $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ 257*22433fc5SMasahiro Yamada -T $(@D)/.tmp_$(@F:.o=.ver); \ 258*22433fc5SMasahiro Yamada rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ 259*22433fc5SMasahiro Yamada else \ 260*22433fc5SMasahiro Yamada mv -f $(@D)/.tmp_$(@F) $@; \ 261*22433fc5SMasahiro Yamada fi; 262*22433fc5SMasahiro Yamadaendif 263*22433fc5SMasahiro Yamada 264*22433fc5SMasahiro Yamadaifdef CONFIG_FTRACE_MCOUNT_RECORD 265*22433fc5SMasahiro Yamadaifdef BUILD_C_RECORDMCOUNT 266*22433fc5SMasahiro Yamadaifeq ("$(origin RECORDMCOUNT_WARN)", "command line") 267*22433fc5SMasahiro Yamada RECORDMCOUNT_FLAGS = -w 268*22433fc5SMasahiro Yamadaendif 269*22433fc5SMasahiro Yamada# Due to recursion, we must skip empty.o. 270*22433fc5SMasahiro Yamada# The empty.o file is created in the make process in order to determine 271*22433fc5SMasahiro Yamada# the target endianness and word size. It is made before all other C 272*22433fc5SMasahiro Yamada# files, including recordmcount. 273*22433fc5SMasahiro Yamadasub_cmd_record_mcount = \ 274*22433fc5SMasahiro Yamada if [ $(@) != "scripts/mod/empty.o" ]; then \ 275*22433fc5SMasahiro Yamada $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ 276*22433fc5SMasahiro Yamada fi; 277*22433fc5SMasahiro Yamadarecordmcount_source := $(srctree)/scripts/recordmcount.c \ 278*22433fc5SMasahiro Yamada $(srctree)/scripts/recordmcount.h 279*22433fc5SMasahiro Yamadaelse 280*22433fc5SMasahiro Yamadasub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ 281*22433fc5SMasahiro Yamada "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ 282*22433fc5SMasahiro Yamada "$(if $(CONFIG_64BIT),64,32)" \ 283*22433fc5SMasahiro Yamada "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ 284*22433fc5SMasahiro Yamada "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ 285*22433fc5SMasahiro Yamada "$(if $(part-of-module),1,0)" "$(@)"; 286*22433fc5SMasahiro Yamadarecordmcount_source := $(srctree)/scripts/recordmcount.pl 287*22433fc5SMasahiro Yamadaendif 288*22433fc5SMasahiro Yamadacmd_record_mcount = \ 289*22433fc5SMasahiro Yamada if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then \ 290*22433fc5SMasahiro Yamada $(sub_cmd_record_mcount) \ 291*22433fc5SMasahiro Yamada fi; 292*22433fc5SMasahiro Yamadaendif 293*22433fc5SMasahiro Yamada 294*22433fc5SMasahiro Yamadadefine rule_cc_o_c 295*22433fc5SMasahiro Yamada $(call echo-cmd,checksrc) $(cmd_checksrc) \ 296*22433fc5SMasahiro Yamada $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \ 297*22433fc5SMasahiro Yamada $(cmd_modversions) \ 298*22433fc5SMasahiro Yamada $(call echo-cmd,record_mcount) \ 299*22433fc5SMasahiro Yamada $(cmd_record_mcount) \ 300*22433fc5SMasahiro Yamada scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ 301*22433fc5SMasahiro Yamada $(dot-target).tmp; \ 302*22433fc5SMasahiro Yamada rm -f $(depfile); \ 303*22433fc5SMasahiro Yamada mv -f $(dot-target).tmp $(dot-target).cmd 304*22433fc5SMasahiro Yamadaendef 305*22433fc5SMasahiro Yamada 306*22433fc5SMasahiro Yamada# Built-in and composite module parts 307*22433fc5SMasahiro Yamada$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE 308*22433fc5SMasahiro Yamada $(call cmd,force_checksrc) 309*22433fc5SMasahiro Yamada $(call if_changed_rule,cc_o_c) 310*22433fc5SMasahiro Yamada 311*22433fc5SMasahiro Yamada# Single-part modules are special since we need to mark them in $(MODVERDIR) 312*22433fc5SMasahiro Yamada 313*22433fc5SMasahiro Yamada$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE 314*22433fc5SMasahiro Yamada $(call cmd,force_checksrc) 315*22433fc5SMasahiro Yamada $(call if_changed_rule,cc_o_c) 316*22433fc5SMasahiro Yamada @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod) 317*22433fc5SMasahiro Yamada 318*22433fc5SMasahiro Yamadaquiet_cmd_cc_lst_c = MKLST $@ 319*22433fc5SMasahiro Yamada cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ 320*22433fc5SMasahiro Yamada $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ 321*22433fc5SMasahiro Yamada System.map $(OBJDUMP) > $@ 322*22433fc5SMasahiro Yamada 323*22433fc5SMasahiro Yamada$(obj)/%.lst: $(src)/%.c FORCE 324*22433fc5SMasahiro Yamada $(call if_changed_dep,cc_lst_c) 325*22433fc5SMasahiro Yamada 326*22433fc5SMasahiro Yamada# Compile assembler sources (.S) 327*22433fc5SMasahiro Yamada# --------------------------------------------------------------------------- 328*22433fc5SMasahiro Yamada 329*22433fc5SMasahiro Yamadamodkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) 330*22433fc5SMasahiro Yamada 331*22433fc5SMasahiro Yamada$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) 332*22433fc5SMasahiro Yamada$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) 333*22433fc5SMasahiro Yamada 334*22433fc5SMasahiro Yamadaquiet_cmd_as_s_S = CPP $(quiet_modtag) $@ 335*22433fc5SMasahiro Yamadacmd_as_s_S = $(CPP) $(a_flags) -o $@ $< 336*22433fc5SMasahiro Yamada 337*22433fc5SMasahiro Yamada$(obj)/%.s: $(src)/%.S FORCE 338*22433fc5SMasahiro Yamada $(call if_changed_dep,as_s_S) 339*22433fc5SMasahiro Yamada 340*22433fc5SMasahiro Yamadaquiet_cmd_as_o_S = AS $(quiet_modtag) $@ 341*22433fc5SMasahiro Yamadacmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 342*22433fc5SMasahiro Yamada 343*22433fc5SMasahiro Yamada$(obj)/%.o: $(src)/%.S FORCE 344*22433fc5SMasahiro Yamada $(call if_changed_dep,as_o_S) 345*22433fc5SMasahiro Yamada 346*22433fc5SMasahiro Yamadatargets += $(real-objs-y) $(real-objs-m) $(lib-y) 347*22433fc5SMasahiro Yamadatargets += $(extra-y) $(MAKECMDGOALS) $(always) 348*22433fc5SMasahiro Yamada 349*22433fc5SMasahiro Yamada# Linker scripts preprocessor (.lds.S -> .lds) 350*22433fc5SMasahiro Yamada# --------------------------------------------------------------------------- 351*22433fc5SMasahiro Yamadaquiet_cmd_cpp_lds_S = LDS $@ 352*22433fc5SMasahiro Yamada cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ 353*22433fc5SMasahiro Yamada -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< 354*22433fc5SMasahiro Yamada 355*22433fc5SMasahiro Yamada$(obj)/%.lds: $(src)/%.lds.S FORCE 356*22433fc5SMasahiro Yamada $(call if_changed_dep,cpp_lds_S) 357*22433fc5SMasahiro Yamada 358*22433fc5SMasahiro Yamada# ASN.1 grammar 359*22433fc5SMasahiro Yamada# --------------------------------------------------------------------------- 360*22433fc5SMasahiro Yamadaquiet_cmd_asn1_compiler = ASN.1 $@ 361*22433fc5SMasahiro Yamada cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ 362*22433fc5SMasahiro Yamada $(subst .h,.c,$@) $(subst .c,.h,$@) 363*22433fc5SMasahiro Yamada 364*22433fc5SMasahiro Yamada.PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h 365*22433fc5SMasahiro Yamada 366*22433fc5SMasahiro Yamada$(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler 367*22433fc5SMasahiro Yamada $(call cmd,asn1_compiler) 368*22433fc5SMasahiro Yamada 369*22433fc5SMasahiro Yamada# Build the compiled-in targets 370*22433fc5SMasahiro Yamada# --------------------------------------------------------------------------- 371*22433fc5SMasahiro Yamada 372*22433fc5SMasahiro Yamada# To build objects in subdirs, we need to descend into the directories 373*22433fc5SMasahiro Yamada$(sort $(subdir-obj-y)): $(subdir-ym) ; 374*22433fc5SMasahiro Yamada 375*22433fc5SMasahiro Yamada# 376*22433fc5SMasahiro Yamada# Rule to compile a set of .o files into one .o file 377*22433fc5SMasahiro Yamada# 378*22433fc5SMasahiro Yamadaifdef builtin-target 379*22433fc5SMasahiro Yamadaquiet_cmd_link_o_target = LD $@ 380*22433fc5SMasahiro Yamada# If the list of objects to link is empty, just create an empty built-in.o 381*22433fc5SMasahiro Yamadacmd_link_o_target = $(if $(strip $(obj-y)),\ 382*22433fc5SMasahiro Yamada $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \ 383*22433fc5SMasahiro Yamada $(cmd_secanalysis),\ 384*22433fc5SMasahiro Yamada rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@) 385*22433fc5SMasahiro Yamada 386*22433fc5SMasahiro Yamada$(builtin-target): $(obj-y) FORCE 387*22433fc5SMasahiro Yamada $(call if_changed,link_o_target) 388*22433fc5SMasahiro Yamada 389*22433fc5SMasahiro Yamadatargets += $(builtin-target) 390*22433fc5SMasahiro Yamadaendif # builtin-target 391*22433fc5SMasahiro Yamada 392*22433fc5SMasahiro Yamada# 393*22433fc5SMasahiro Yamada# Rule to create modules.order file 394*22433fc5SMasahiro Yamada# 395*22433fc5SMasahiro Yamada# Create commands to either record .ko file or cat modules.order from 396*22433fc5SMasahiro Yamada# a subdirectory 397*22433fc5SMasahiro Yamadamodorder-cmds = \ 398*22433fc5SMasahiro Yamada $(foreach m, $(modorder), \ 399*22433fc5SMasahiro Yamada $(if $(filter %/modules.order, $m), \ 400*22433fc5SMasahiro Yamada cat $m;, echo kernel/$m;)) 401*22433fc5SMasahiro Yamada 402*22433fc5SMasahiro Yamada$(modorder-target): $(subdir-ym) FORCE 403*22433fc5SMasahiro Yamada $(Q)(cat /dev/null; $(modorder-cmds)) > $@ 404*22433fc5SMasahiro Yamada 405*22433fc5SMasahiro Yamada# 406*22433fc5SMasahiro Yamada# Rule to compile a set of .o files into one .a file 407*22433fc5SMasahiro Yamada# 408*22433fc5SMasahiro Yamadaifdef lib-target 409*22433fc5SMasahiro Yamadaquiet_cmd_link_l_target = AR $@ 410*22433fc5SMasahiro Yamadacmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y) 411*22433fc5SMasahiro Yamada 412*22433fc5SMasahiro Yamada$(lib-target): $(lib-y) FORCE 413*22433fc5SMasahiro Yamada $(call if_changed,link_l_target) 414*22433fc5SMasahiro Yamada 415*22433fc5SMasahiro Yamadatargets += $(lib-target) 416*22433fc5SMasahiro Yamadaendif 417*22433fc5SMasahiro Yamada 418*22433fc5SMasahiro Yamada# 419*22433fc5SMasahiro Yamada# Rule to link composite objects 420*22433fc5SMasahiro Yamada# 421*22433fc5SMasahiro Yamada# Composite objects are specified in kbuild makefile as follows: 422*22433fc5SMasahiro Yamada# <composite-object>-objs := <list of .o files> 423*22433fc5SMasahiro Yamada# or 424*22433fc5SMasahiro Yamada# <composite-object>-y := <list of .o files> 425*22433fc5SMasahiro Yamadalink_multi_deps = \ 426*22433fc5SMasahiro Yamada$(filter $(addprefix $(obj)/, \ 427*22433fc5SMasahiro Yamada$($(subst $(obj)/,,$(@:.o=-objs))) \ 428*22433fc5SMasahiro Yamada$($(subst $(obj)/,,$(@:.o=-y)))), $^) 429*22433fc5SMasahiro Yamada 430*22433fc5SMasahiro Yamadaquiet_cmd_link_multi-y = LD $@ 431*22433fc5SMasahiro Yamadacmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) 432*22433fc5SMasahiro Yamada 433*22433fc5SMasahiro Yamadaquiet_cmd_link_multi-m = LD [M] $@ 434*22433fc5SMasahiro Yamadacmd_link_multi-m = $(cmd_link_multi-y) 435*22433fc5SMasahiro Yamada 436*22433fc5SMasahiro Yamada# We would rather have a list of rules like 437*22433fc5SMasahiro Yamada# foo.o: $(foo-objs) 438*22433fc5SMasahiro Yamada# but that's not so easy, so we rather make all composite objects depend 439*22433fc5SMasahiro Yamada# on the set of all their parts 440*22433fc5SMasahiro Yamada$(multi-used-y) : %.o: $(multi-objs-y) FORCE 441*22433fc5SMasahiro Yamada $(call if_changed,link_multi-y) 442*22433fc5SMasahiro Yamada 443*22433fc5SMasahiro Yamada$(multi-used-m) : %.o: $(multi-objs-m) FORCE 444*22433fc5SMasahiro Yamada $(call if_changed,link_multi-m) 445*22433fc5SMasahiro Yamada @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod) 446*22433fc5SMasahiro Yamada 447*22433fc5SMasahiro Yamadatargets += $(multi-used-y) $(multi-used-m) 448*22433fc5SMasahiro Yamada 449*22433fc5SMasahiro Yamada 450*22433fc5SMasahiro Yamada# Descending 451*22433fc5SMasahiro Yamada# --------------------------------------------------------------------------- 452*22433fc5SMasahiro Yamada 453*22433fc5SMasahiro YamadaPHONY += $(subdir-ym) 454*22433fc5SMasahiro Yamada$(subdir-ym): 455*22433fc5SMasahiro Yamada $(Q)$(MAKE) $(build)=$@ 456*22433fc5SMasahiro Yamada 457*22433fc5SMasahiro Yamada# Add FORCE to the prequisites of a target to force it to be always rebuilt. 458*22433fc5SMasahiro Yamada# --------------------------------------------------------------------------- 459*22433fc5SMasahiro Yamada 460*22433fc5SMasahiro YamadaPHONY += FORCE 461*22433fc5SMasahiro Yamada 462*22433fc5SMasahiro YamadaFORCE: 463*22433fc5SMasahiro Yamada 464*22433fc5SMasahiro Yamada# Read all saved command lines and dependencies for the $(targets) we 465*22433fc5SMasahiro Yamada# may be building above, using $(if_changed{,_dep}). As an 466*22433fc5SMasahiro Yamada# optimization, we don't need to read them if the target does not 467*22433fc5SMasahiro Yamada# exist, we will rebuild anyway in that case. 468*22433fc5SMasahiro Yamada 469*22433fc5SMasahiro Yamadatargets := $(wildcard $(sort $(targets))) 470*22433fc5SMasahiro Yamadacmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 471*22433fc5SMasahiro Yamada 472*22433fc5SMasahiro Yamadaifneq ($(cmd_files),) 473*22433fc5SMasahiro Yamada include $(cmd_files) 474*22433fc5SMasahiro Yamadaendif 475*22433fc5SMasahiro Yamada 476*22433fc5SMasahiro Yamada# Declare the contents of the .PHONY variable as phony. We keep that 477*22433fc5SMasahiro Yamada# information in a variable se we can use it in if_changed and friends. 478*22433fc5SMasahiro Yamada 479*22433fc5SMasahiro Yamada.PHONY: $(PHONY) 480