9fb81323eb
Making the fixdep helper to be invoked within dep-cmd. Each user of the build framework needs to make sure fixdep exists before executing the build itself. If the build doesn't find fixdep, it falls back to the old style dependency tracking. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1443004442-32660-6-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
140 lines
3.3 KiB
Makefile
140 lines
3.3 KiB
Makefile
###
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# Main build makefile.
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#
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# Lots of this code have been borrowed or heavily inspired from parts
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# of kbuild code, which is not credited, but mostly developed by:
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#
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# Copyright (C) Sam Ravnborg <sam@mars.ravnborg.org>, 2015
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# Copyright (C) Linus Torvalds <torvalds@linux-foundation.org>, 2015
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#
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PHONY := __build
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__build:
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ifeq ($(V),1)
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quiet =
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Q =
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else
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quiet=quiet_
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Q=@
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endif
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build-dir := $(srctree)/tools/build
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# Define $(fixdep) for dep-cmd function
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ifeq ($(OUTPUT),)
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fixdep := $(build-dir)/fixdep
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else
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fixdep := $(OUTPUT)/fixdep
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endif
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# Generic definitions
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include $(build-dir)/Build.include
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# do not force detected configuration
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-include $(OUTPUT).config-detected
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# Init all relevant variables used in build files so
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# 1) they have correct type
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# 2) they do not inherit any value from the environment
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subdir-y :=
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obj-y :=
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subdir-y :=
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subdir-obj-y :=
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# Build definitions
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build-file := $(dir)/Build
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-include $(build-file)
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quiet_cmd_flex = FLEX $@
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quiet_cmd_bison = BISON $@
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# Create directory unless it exists
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quiet_cmd_mkdir = MKDIR $(dir $@)
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cmd_mkdir = mkdir -p $(dir $@)
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rule_mkdir = $(if $(wildcard $(dir $@)),,@$(call echo-cmd,mkdir) $(cmd_mkdir))
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# Compile command
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quiet_cmd_cc_o_c = CC $@
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cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
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quiet_cmd_cc_i_c = CPP $@
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cmd_cc_i_c = $(CC) $(c_flags) -E -o $@ $<
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quiet_cmd_cc_s_c = AS $@
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cmd_cc_s_c = $(CC) $(c_flags) -S -o $@ $<
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quiet_cmd_gen = GEN $@
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# Link agregate command
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# If there's nothing to link, create empty $@ object.
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quiet_cmd_ld_multi = LD $@
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cmd_ld_multi = $(if $(strip $(obj-y)),\
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$(LD) -r -o $@ $(filter $(obj-y),$^),rm -f $@; $(AR) rcs $@)
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# Build rules
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$(OUTPUT)%.o: %.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)%.o: %.S FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)%.i: %.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_i_c)
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$(OUTPUT)%.i: %.S FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_i_c)
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$(OUTPUT)%.s: %.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_s_c)
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# Gather build data:
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# obj-y - list of build objects
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# subdir-y - list of directories to nest
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# subdir-obj-y - list of directories objects 'dir/$(obj)-in.o'
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obj-y := $($(obj)-y)
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subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
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obj-y := $(patsubst %/, %/$(obj)-in.o, $(obj-y))
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subdir-obj-y := $(filter %/$(obj)-in.o, $(obj-y))
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# '$(OUTPUT)/dir' prefix to all objects
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objprefix := $(subst ./,,$(OUTPUT)$(dir)/)
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obj-y := $(addprefix $(objprefix),$(obj-y))
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subdir-obj-y := $(addprefix $(objprefix),$(subdir-obj-y))
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# Final '$(obj)-in.o' object
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in-target := $(objprefix)$(obj)-in.o
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PHONY += $(subdir-y)
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$(subdir-y):
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$(Q)$(MAKE) -f $(build-dir)/Makefile.build dir=$(dir)/$@ obj=$(obj)
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$(sort $(subdir-obj-y)): $(subdir-y) ;
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$(in-target): $(obj-y) FORCE
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$(call rule_mkdir)
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$(call if_changed,ld_multi)
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__build: $(in-target)
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@:
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PHONY += FORCE
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FORCE:
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# Include all cmd files to get all the dependency rules
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# for all objects included
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targets := $(wildcard $(sort $(obj-y) $(in-target) $(MAKECMDGOALS)))
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cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
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ifneq ($(cmd_files),)
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include $(cmd_files)
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endif
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.PHONY: $(PHONY)
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