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1###
2# Main build makefile.
3#
4# Lots of this code have been borrowed or heavily inspired from parts
5# of kbuild code, which is not credited, but mostly developed by:
6#
7# Copyright (C) Sam Ravnborg <sam@mars.ravnborg.org>, 2015
8# Copyright (C) Linus Torvalds <torvalds@linux-foundation.org>, 2015
9#
10
11PHONY := __build
12__build:
13
14ifeq ($(V),1)
15 quiet =
16 Q =
17else
18 quiet=quiet_
19 Q=@
20endif
21
22build-dir := $(srctree)/tools/build
23
24# Define $(fixdep) for dep-cmd function
25ifeq ($(OUTPUT),)
26 fixdep := $(build-dir)/fixdep
27else
28 fixdep := $(OUTPUT)/fixdep
29endif
30
31# Generic definitions
32include $(build-dir)/Build.include
33
34# do not force detected configuration
35-include $(OUTPUT).config-detected
36
37# Init all relevant variables used in build files so
38# 1) they have correct type
39# 2) they do not inherit any value from the environment
40subdir-y :=
41obj-y :=
42subdir-y :=
43subdir-obj-y :=
44
45# Build definitions
46build-file := $(dir)/Build
47-include $(build-file)
48
49quiet_cmd_flex = FLEX $@
50quiet_cmd_bison = BISON $@
51
52# Create directory unless it exists
53quiet_cmd_mkdir = MKDIR $(dir $@)
54 cmd_mkdir = mkdir -p $(dir $@)
55 rule_mkdir = $(if $(wildcard $(dir $@)),,@$(call echo-cmd,mkdir) $(cmd_mkdir))
56
57# Compile command
58quiet_cmd_cc_o_c = CC $@
59 cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
60
61quiet_cmd_host_cc_o_c = HOSTCC $@
62 cmd_host_cc_o_c = $(HOSTCC) $(host_c_flags) -c -o $@ $<
63
64quiet_cmd_cxx_o_c = CXX $@
65 cmd_cxx_o_c = $(CXX) $(cxx_flags) -c -o $@ $<
66
67quiet_cmd_cpp_i_c = CPP $@
68 cmd_cpp_i_c = $(CC) $(c_flags) -E -o $@ $<
69
70quiet_cmd_cc_s_c = AS $@
71 cmd_cc_s_c = $(CC) $(c_flags) -S -o $@ $<
72
73quiet_cmd_gen = GEN $@
74
75# Link agregate command
76# If there's nothing to link, create empty $@ object.
77quiet_cmd_ld_multi = LD $@
78 cmd_ld_multi = $(if $(strip $(obj-y)),\
79 $(LD) -r -o $@ $(filter $(obj-y),$^),rm -f $@; $(AR) rcs $@)
80
81quiet_cmd_host_ld_multi = HOSTLD $@
82 cmd_host_ld_multi = $(if $(strip $(obj-y)),\
83 $(HOSTLD) -r -o $@ $(filter $(obj-y),$^),rm -f $@; $(HOSTAR) rcs $@)
84
85ifneq ($(filter $(obj),$(hostprogs)),)
86 host = host_
87endif
88
89# Build rules
90$(OUTPUT)%.o: %.c FORCE
91 $(call rule_mkdir)
92 $(call if_changed_dep,$(host)cc_o_c)
93
94$(OUTPUT)%.o: %.cpp FORCE
95 $(call rule_mkdir)
96 $(call if_changed_dep,cxx_o_c)
97
98$(OUTPUT)%.o: %.S FORCE
99 $(call rule_mkdir)
100 $(call if_changed_dep,$(host)cc_o_c)
101
102$(OUTPUT)%.i: %.c FORCE
103 $(call rule_mkdir)
104 $(call if_changed_dep,cpp_i_c)
105
106$(OUTPUT)%.s: %.S FORCE
107 $(call rule_mkdir)
108 $(call if_changed_dep,cpp_i_c)
109
110$(OUTPUT)%.s: %.c FORCE
111 $(call rule_mkdir)
112 $(call if_changed_dep,cc_s_c)
113
114# Gather build data:
115# obj-y - list of build objects
116# subdir-y - list of directories to nest
117# subdir-obj-y - list of directories objects 'dir/$(obj)-in.o'
118obj-y := $($(obj)-y)
119subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
120obj-y := $(patsubst %/, %/$(obj)-in.o, $(obj-y))
121subdir-obj-y := $(filter %/$(obj)-in.o, $(obj-y))
122
123# '$(OUTPUT)/dir' prefix to all objects
124objprefix := $(subst ./,,$(OUTPUT)$(dir)/)
125obj-y := $(addprefix $(objprefix),$(obj-y))
126subdir-obj-y := $(addprefix $(objprefix),$(subdir-obj-y))
127
128# Final '$(obj)-in.o' object
129in-target := $(objprefix)$(obj)-in.o
130
131PHONY += $(subdir-y)
132
133$(subdir-y):
134 $(Q)$(MAKE) -f $(build-dir)/Makefile.build dir=$(dir)/$@ obj=$(obj)
135
136$(sort $(subdir-obj-y)): $(subdir-y) ;
137
138$(in-target): $(obj-y) FORCE
139 $(call rule_mkdir)
140 $(call if_changed,$(host)ld_multi)
141
142__build: $(in-target)
143 @:
144
145PHONY += FORCE
146FORCE:
147
148# Include all cmd files to get all the dependency rules
149# for all objects included
150targets := $(wildcard $(sort $(obj-y) $(in-target) $(MAKECMDGOALS)))
151cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
152
153ifneq ($(cmd_files),)
154 include $(cmd_files)
155endif
156
157.PHONY: $(PHONY)
1###
2# Main build makefile.
3#
4# Lots of this code have been borrowed or heavily inspired from parts
5# of kbuild code, which is not credited, but mostly developed by:
6#
7# Copyright (C) Sam Ravnborg <sam@mars.ravnborg.org>, 2015
8# Copyright (C) Linus Torvalds <torvalds@linux-foundation.org>, 2015
9#
10
11PHONY := __build
12__build:
13
14ifeq ($(V),1)
15 quiet =
16 Q =
17else
18 quiet=quiet_
19 Q=@
20endif
21
22build-dir := $(srctree)/tools/build
23
24# Define $(fixdep) for dep-cmd function
25ifeq ($(OUTPUT),)
26 fixdep := $(build-dir)/fixdep
27else
28 fixdep := $(OUTPUT)/fixdep
29endif
30
31# Generic definitions
32include $(build-dir)/Build.include
33
34# do not force detected configuration
35-include $(OUTPUT).config-detected
36
37# Init all relevant variables used in build files so
38# 1) they have correct type
39# 2) they do not inherit any value from the environment
40subdir-y :=
41obj-y :=
42subdir-y :=
43subdir-obj-y :=
44
45# Build definitions
46build-file := $(dir)/Build
47-include $(build-file)
48
49quiet_cmd_flex = FLEX $@
50quiet_cmd_bison = BISON $@
51
52# Create directory unless it exists
53quiet_cmd_mkdir = MKDIR $(dir $@)
54 cmd_mkdir = mkdir -p $(dir $@)
55 rule_mkdir = $(if $(wildcard $(dir $@)),,@$(call echo-cmd,mkdir) $(cmd_mkdir))
56
57# Compile command
58quiet_cmd_cc_o_c = CC $@
59 cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
60
61quiet_cmd_cc_i_c = CPP $@
62 cmd_cc_i_c = $(CC) $(c_flags) -E -o $@ $<
63
64quiet_cmd_cc_s_c = AS $@
65 cmd_cc_s_c = $(CC) $(c_flags) -S -o $@ $<
66
67quiet_cmd_gen = GEN $@
68
69# Link agregate command
70# If there's nothing to link, create empty $@ object.
71quiet_cmd_ld_multi = LD $@
72 cmd_ld_multi = $(if $(strip $(obj-y)),\
73 $(LD) -r -o $@ $(filter $(obj-y),$^),rm -f $@; $(AR) rcs $@)
74
75# Build rules
76$(OUTPUT)%.o: %.c FORCE
77 $(call rule_mkdir)
78 $(call if_changed_dep,cc_o_c)
79
80$(OUTPUT)%.o: %.S FORCE
81 $(call rule_mkdir)
82 $(call if_changed_dep,cc_o_c)
83
84$(OUTPUT)%.i: %.c FORCE
85 $(call rule_mkdir)
86 $(call if_changed_dep,cc_i_c)
87
88$(OUTPUT)%.s: %.S FORCE
89 $(call rule_mkdir)
90 $(call if_changed_dep,cc_i_c)
91
92$(OUTPUT)%.s: %.c FORCE
93 $(call rule_mkdir)
94 $(call if_changed_dep,cc_s_c)
95
96# Gather build data:
97# obj-y - list of build objects
98# subdir-y - list of directories to nest
99# subdir-obj-y - list of directories objects 'dir/$(obj)-in.o'
100obj-y := $($(obj)-y)
101subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
102obj-y := $(patsubst %/, %/$(obj)-in.o, $(obj-y))
103subdir-obj-y := $(filter %/$(obj)-in.o, $(obj-y))
104
105# '$(OUTPUT)/dir' prefix to all objects
106objprefix := $(subst ./,,$(OUTPUT)$(dir)/)
107obj-y := $(addprefix $(objprefix),$(obj-y))
108subdir-obj-y := $(addprefix $(objprefix),$(subdir-obj-y))
109
110# Final '$(obj)-in.o' object
111in-target := $(objprefix)$(obj)-in.o
112
113PHONY += $(subdir-y)
114
115$(subdir-y):
116 $(Q)$(MAKE) -f $(build-dir)/Makefile.build dir=$(dir)/$@ obj=$(obj)
117
118$(sort $(subdir-obj-y)): $(subdir-y) ;
119
120$(in-target): $(obj-y) FORCE
121 $(call rule_mkdir)
122 $(call if_changed,ld_multi)
123
124__build: $(in-target)
125 @:
126
127PHONY += FORCE
128FORCE:
129
130# Include all cmd files to get all the dependency rules
131# for all objects included
132targets := $(wildcard $(sort $(obj-y) $(in-target) $(MAKECMDGOALS)))
133cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
134
135ifneq ($(cmd_files),)
136 include $(cmd_files)
137endif
138
139.PHONY: $(PHONY)