| #### | |
| # kbuild: Generic definitions | |
| # Convenient variables | |
| comma := , | |
| quote := " | |
| squote := ' | |
| empty := | |
| space := $(empty) $(empty) | |
| space_escape := _-_SPACE_-_ | |
| pound := \# | |
| ### | |
| # Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o | |
| dot-target = $(dir $@).$(notdir $@) | |
| ### | |
| # The temporary file to save gcc -MD generated dependencies must not | |
| # contain a comma | |
| depfile = $(subst $(comma),_,$(dot-target).d) | |
| ### | |
| # filename of target with directory and extension stripped | |
| basetarget = $(basename $(notdir $@)) | |
| ### | |
| # filename of first prerequisite with directory and extension stripped | |
| baseprereq = $(basename $(notdir $<)) | |
| ### | |
| # Escape single quote for use in echo statements | |
| escsq = $(subst $(squote),'\$(squote)',$1) | |
| ### | |
| # Easy method for doing a status message | |
| kecho := : | |
| quiet_kecho := echo | |
| silent_kecho := : | |
| kecho := $($(quiet)kecho) | |
| ### | |
| # filechk is used to check if the content of a generated file is updated. | |
| # Sample usage: | |
| # define filechk_sample | |
| # echo $KERNELRELEASE | |
| # endef | |
| # version.h : Makefile | |
| # $(call filechk,sample) | |
| # The rule defined shall write to stdout the content of the new file. | |
| # The existing file will be compared with the new one. | |
| # - If no file exist it is created | |
| # - If the content differ the new file is used | |
| # - If they are equal no change, and no timestamp update | |
| # - stdin is piped in from the first prerequisite ($<) so one has | |
| # to specify a valid file as first prerequisite (often the kbuild file) | |
| define filechk | |
| $(Q)set -e; \ | |
| mkdir -p $(dir $@); \ | |
| $(filechk_$(1)) < $< > $@.tmp; \ | |
| if [ -r $@ ] && cmp -s $@ $@.tmp; then \ | |
| rm -f $@.tmp; \ | |
| else \ | |
| $(kecho) ' UPD $@'; \ | |
| mv -f $@.tmp $@; \ | |
| fi | |
| endef | |
| ###### | |
| # gcc support functions | |
| # See documentation in Documentation/kbuild/makefiles.txt | |
| # cc-cross-prefix | |
| # Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-) | |
| # Return first prefix where a prefix$(CC) is found in PATH. | |
| # If no $(CC) found in PATH with listed prefixes return nothing | |
| cc-cross-prefix = \ | |
| $(word 1, $(foreach c,$(1), \ | |
| $(shell set -e; \ | |
| if (which $(strip $(c))$(CC)) > /dev/null 2>&1 ; then \ | |
| echo $(c); \ | |
| fi))) | |
| # output directory for tests below | |
| TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/) | |
| # try-run | |
| # Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise) | |
| # Exit code chooses option. "$$TMP" is can be used as temporary file and | |
| # is automatically cleaned up. | |
| # modifed for U-Boot: prevent cc-option from leaving .*.su files | |
| try-run = $(shell set -e; \ | |
| TMP="$(TMPOUT).$$$$.tmp"; \ | |
| TMPO="$(TMPOUT).$$$$.o"; \ | |
| TMPSU="$(TMPOUT).$$$$.su"; \ | |
| if ($(1)) >/dev/null 2>&1; \ | |
| then echo "$(2)"; \ | |
| else echo "$(3)"; \ | |
| fi; \ | |
| rm -f "$$TMP" "$$TMPO" "$$TMPSU") | |
| # as-option | |
| # Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,) | |
| as-option = $(call try-run,\ | |
| $(CC) $(KBUILD_CFLAGS) $(1) -c -x assembler /dev/null -o "$$TMP",$(1),$(2)) | |
| # as-instr | |
| # Usage: cflags-y += $(call as-instr,instr,option1,option2) | |
| as-instr = $(call try-run,\ | |
| printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3)) | |
| # __cc-option | |
| # Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586) | |
| __cc-option = $(call try-run,\ | |
| $(1) -Werror $(2) $(3) -c -x c /dev/null -o "$$TMP",$(3),$(4)) | |
| # cc-option | |
| # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) | |
| cc-option = $(call __cc-option, $(CC),\ | |
| $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS),$(1),$(2)) | |
| # hostcc-option | |
| # Usage: cflags-y += $(call hostcc-option,-march=winchip-c6,-march=i586) | |
| hostcc-option = $(call __cc-option, $(HOSTCC),\ | |
| $(HOSTCFLAGS) $(HOST_EXTRACFLAGS),$(1),$(2)) | |
| # cc-option-yn | |
| # Usage: flag := $(call cc-option-yn,-march=winchip-c6) | |
| cc-option-yn = $(call try-run,\ | |
| $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n) | |
| # cc-disable-warning | |
| # Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable) | |
| cc-disable-warning = $(call try-run,\ | |
| $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1))) | |
| # cc-name | |
| # Expands to either gcc or clang | |
| cc-name = $(shell $(CC) -v 2>&1 | grep -q "clang version" && echo clang || echo gcc) | |
| # cc-version | |
| cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC)) | |
| # cc-ifversion | |
| # Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1) | |
| cc-ifversion = $(shell [ $(cc-version) $(1) $(2) ] && echo $(3) || echo $(4)) | |
| # added for U-Boot | |
| binutils-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/binutils-version.sh $(AS)) | |
| dtc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/dtc-version.sh $(DTC)) | |
| # cc-ldoption | |
| # Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both) | |
| cc-ldoption = $(call try-run,\ | |
| $(CC) $(1) $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2)) | |
| # ld-option | |
| # Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y) | |
| ld-option = $(call try-run, $(LD) $(KBUILD_LDFLAGS) $(1) -v,$(1),$(2),$(3)) | |
| # ar-option | |
| # Usage: KBUILD_ARFLAGS := $(call ar-option,D) | |
| # Important: no spaces around options | |
| ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2)) | |
| # ld-version | |
| # Note this is mainly for HJ Lu's 3 number binutil versions | |
| ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh) | |
| # ld-ifversion | |
| # Usage: $(call ld-ifversion, -ge, 22252, y) | |
| ld-ifversion = $(shell [ $(ld-version) $(1) $(2) ] && echo $(3) || echo $(4)) | |
| ###### | |
| ### | |
| # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj= | |
| # Usage: | |
| # $(Q)$(MAKE) $(build)=dir | |
| build := -f $(srctree)/scripts/Makefile.build obj | |
| ### | |
| # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.modbuiltin obj= | |
| # Usage: | |
| # $(Q)$(MAKE) $(modbuiltin)=dir | |
| modbuiltin := -f $(srctree)/scripts/Makefile.modbuiltin obj | |
| ### | |
| # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj= | |
| # Usage: | |
| # $(Q)$(MAKE) $(dtbinst)=dir | |
| dtbinst := -f $(srctree)/scripts/Makefile.dtbinst obj | |
| ### | |
| # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj= | |
| # Usage: | |
| # $(Q)$(MAKE) $(clean)=dir | |
| clean := -f $(srctree)/scripts/Makefile.clean obj | |
| ### | |
| # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.headersinst obj= | |
| # Usage: | |
| # $(Q)$(MAKE) $(hdr-inst)=dir | |
| hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj | |
| # Prefix -I with $(srctree) if it is not an absolute path. | |
| # skip if -I has no parameter | |
| addtree = $(if $(patsubst -I%,%,$(1)), \ | |
| $(if $(filter-out -I/% -I./% -I../%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1)),$(1)),$(1)) | |
| # Find all -I options and call addtree | |
| flags = $(foreach o,$($(1)),$(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o))) | |
| # echo command. | |
| # Short version is used, if $(quiet) equals `quiet_', otherwise full one. | |
| echo-cmd = $(if $($(quiet)cmd_$(1)),\ | |
| echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';) | |
| # printing commands | |
| cmd = @$(echo-cmd) $(cmd_$(1)) | |
| # Add $(obj)/ for paths that are not absolute | |
| objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o))) | |
| ### | |
| # if_changed - execute command if any prerequisite is newer than | |
| # target, or command line has changed | |
| # if_changed_dep - as if_changed, but uses fixdep to reveal dependencies | |
| # including used config symbols | |
| # if_changed_rule - as if_changed but execute rule instead | |
| # See doc/develop/makefiles.rst for more info | |
| ifneq ($(KBUILD_NOCMDDEP),1) | |
| # Check if both arguments are the same including their order. Result is empty | |
| # string if equal. User may override this check using make KBUILD_NOCMDDEP=1 | |
| arg-check = $(filter-out $(subst $(space),$(space_escape),$(strip $(cmd_$@))), \ | |
| $(subst $(space),$(space_escape),$(strip $(cmd_$1)))) | |
| else | |
| arg-check = $(if $(strip $(cmd_$@)),,1) | |
| endif | |
| # Replace >$< with >$$< to preserve $ when reloading the .cmd file | |
| # (needed for make) | |
| # Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file | |
| # (needed for make) | |
| # Replace >'< with >'\''< to be able to enclose the whole string in '...' | |
| # (needed for the shell) | |
| make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1))))) | |
| # Find any prerequisites that is newer than target or that does not exist. | |
| # PHONY targets skipped in both cases. | |
| any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^) | |
| # Execute command if command has changed or prerequisite(s) are updated. | |
| # | |
| if_changed = $(if $(strip $(any-prereq) $(arg-check)), \ | |
| @set -e; \ | |
| $(echo-cmd) $(cmd_$(1)); \ | |
| printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) | |
| # Execute the command and also postprocess generated .d dependencies file. | |
| if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \ | |
| @set -e; \ | |
| $(echo-cmd) $(cmd_$(1)); \ | |
| scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\ | |
| rm -f $(depfile); \ | |
| mv -f $(dot-target).tmp $(dot-target).cmd, @:) | |
| # Usage: $(call if_changed_rule,foo) | |
| # Will check if $(cmd_foo) or any of the prerequisites changed, | |
| # and if so will execute $(rule_foo). | |
| if_changed_rule = $(if $(strip $(any-prereq) $(arg-check) ), \ | |
| @set -e; \ | |
| $(rule_$(1)), @:) | |
| ### | |
| # why - tell why a a target got build | |
| # enabled by make V=2 | |
| # Output (listed in the order they are checked): | |
| # (1) - due to target is PHONY | |
| # (2) - due to target missing | |
| # (3) - due to: file1.h file2.h | |
| # (4) - due to command line change | |
| # (5) - due to missing .cmd file | |
| # (6) - due to target not in $(targets) | |
| # (1) PHONY targets are always build | |
| # (2) No target, so we better build it | |
| # (3) Prerequisite is newer than target | |
| # (4) The command line stored in the file named dir/.target.cmd | |
| # differed from actual command line. This happens when compiler | |
| # options changes | |
| # (5) No dir/.target.cmd file (used to store command line) | |
| # (6) No dir/.target.cmd file and target not listed in $(targets) | |
| # This is a good hint that there is a bug in the kbuild file | |
| ifeq ($(KBUILD_VERBOSE),2) | |
| why = \ | |
| $(if $(filter $@, $(PHONY)),- due to target is PHONY, \ | |
| $(if $(wildcard $@), \ | |
| $(if $(strip $(any-prereq)),- due to: $(any-prereq), \ | |
| $(if $(arg-check), \ | |
| $(if $(cmd_$@),- due to command line change, \ | |
| $(if $(filter $@, $(targets)), \ | |
| - due to missing .cmd file, \ | |
| - due to $(notdir $@) not in $$(targets) \ | |
| ) \ | |
| ) \ | |
| ) \ | |
| ), \ | |
| - due to target missing \ | |
| ) \ | |
| ) | |
| echo-why = $(call escsq, $(strip $(why))) | |
| endif | |
| # delete partially updated (i.e. corrupted) files on error | |
| .DELETE_ON_ERROR: | |
| # do not delete intermediate files automatically | |
| .SECONDARY: | |
| ifdef CONFIG_SPL_BUILD | |
| SPL_ := SPL_ | |
| ifeq ($(CONFIG_VPL_BUILD),y) | |
| SPL_TPL_ := VPL_ | |
| else | |
| ifeq ($(CONFIG_TPL_BUILD),y) | |
| SPL_TPL_ := TPL_ | |
| else | |
| SPL_TPL_ := SPL_ | |
| endif | |
| endif | |
| else | |
| SPL_ := | |
| SPL_TPL_ := | |
| endif |