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c819e2cf JO |
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 | ||
11 | PHONY := __build | |
12 | __build: | |
13 | ||
14 | ifeq ($(V),1) | |
15 | quiet = | |
ceed252f | 16 | Q = |
c819e2cf JO |
17 | else |
18 | quiet=quiet_ | |
ceed252f | 19 | Q=@ |
c819e2cf JO |
20 | endif |
21 | ||
6f0fa58e | 22 | ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
e572d088 JP |
23 | quiet=silent_ |
24 | endif | |
e572d088 | 25 | |
c819e2cf JO |
26 | build-dir := $(srctree)/tools/build |
27 | ||
9fb81323 JO |
28 | # Define $(fixdep) for dep-cmd function |
29 | ifeq ($(OUTPUT),) | |
30 | fixdep := $(build-dir)/fixdep | |
31 | else | |
32 | fixdep := $(OUTPUT)/fixdep | |
33 | endif | |
34 | ||
c819e2cf JO |
35 | # Generic definitions |
36 | include $(build-dir)/Build.include | |
37 | ||
fcfd6611 | 38 | # do not force detected configuration |
64227379 | 39 | -include $(OUTPUT).config-detected |
fcfd6611 | 40 | |
c819e2cf JO |
41 | # Init all relevant variables used in build files so |
42 | # 1) they have correct type | |
43 | # 2) they do not inherit any value from the environment | |
44 | subdir-y := | |
45 | obj-y := | |
46 | subdir-y := | |
47 | subdir-obj-y := | |
48 | ||
49 | # Build definitions | |
50 | build-file := $(dir)/Build | |
d7a3d85e | 51 | -include $(build-file) |
c819e2cf | 52 | |
9352aaba JO |
53 | quiet_cmd_flex = FLEX $@ |
54 | quiet_cmd_bison = BISON $@ | |
55 | ||
579ff6d4 JO |
56 | # Create directory unless it exists |
57 | quiet_cmd_mkdir = MKDIR $(dir $@) | |
58 | cmd_mkdir = mkdir -p $(dir $@) | |
59 | rule_mkdir = $(if $(wildcard $(dir $@)),,@$(call echo-cmd,mkdir) $(cmd_mkdir)) | |
60 | ||
c819e2cf JO |
61 | # Compile command |
62 | quiet_cmd_cc_o_c = CC $@ | |
63 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
64 | ||
0c3b7e42 JO |
65 | quiet_cmd_host_cc_o_c = HOSTCC $@ |
66 | cmd_host_cc_o_c = $(HOSTCC) $(host_c_flags) -c -o $@ $< | |
67 | ||
f61bdc33 WN |
68 | quiet_cmd_cxx_o_c = CXX $@ |
69 | cmd_cxx_o_c = $(CXX) $(cxx_flags) -c -o $@ $< | |
70 | ||
23d43848 MY |
71 | quiet_cmd_cpp_i_c = CPP $@ |
72 | cmd_cpp_i_c = $(CC) $(c_flags) -E -o $@ $< | |
1999307b JO |
73 | |
74 | quiet_cmd_cc_s_c = AS $@ | |
75 | cmd_cc_s_c = $(CC) $(c_flags) -S -o $@ $< | |
76 | ||
237fae79 AH |
77 | quiet_cmd_gen = GEN $@ |
78 | ||
c819e2cf JO |
79 | # Link agregate command |
80 | # If there's nothing to link, create empty $@ object. | |
81 | quiet_cmd_ld_multi = LD $@ | |
82 | cmd_ld_multi = $(if $(strip $(obj-y)),\ | |
0c3b7e42 JO |
83 | $(LD) -r -o $@ $(filter $(obj-y),$^),rm -f $@; $(AR) rcs $@) |
84 | ||
85 | quiet_cmd_host_ld_multi = HOSTLD $@ | |
86 | cmd_host_ld_multi = $(if $(strip $(obj-y)),\ | |
87 | $(HOSTLD) -r -o $@ $(filter $(obj-y),$^),rm -f $@; $(HOSTAR) rcs $@) | |
88 | ||
89 | ifneq ($(filter $(obj),$(hostprogs)),) | |
90 | host = host_ | |
91 | endif | |
c819e2cf JO |
92 | |
93 | # Build rules | |
94 | $(OUTPUT)%.o: %.c FORCE | |
579ff6d4 | 95 | $(call rule_mkdir) |
0c3b7e42 | 96 | $(call if_changed_dep,$(host)cc_o_c) |
c819e2cf | 97 | |
f61bdc33 WN |
98 | $(OUTPUT)%.o: %.cpp FORCE |
99 | $(call rule_mkdir) | |
100 | $(call if_changed_dep,cxx_o_c) | |
101 | ||
c819e2cf | 102 | $(OUTPUT)%.o: %.S FORCE |
579ff6d4 | 103 | $(call rule_mkdir) |
0c3b7e42 | 104 | $(call if_changed_dep,$(host)cc_o_c) |
c819e2cf | 105 | |
1999307b JO |
106 | $(OUTPUT)%.i: %.c FORCE |
107 | $(call rule_mkdir) | |
23d43848 | 108 | $(call if_changed_dep,cpp_i_c) |
1999307b | 109 | |
67678793 | 110 | $(OUTPUT)%.s: %.S FORCE |
1999307b | 111 | $(call rule_mkdir) |
23d43848 | 112 | $(call if_changed_dep,cpp_i_c) |
1999307b JO |
113 | |
114 | $(OUTPUT)%.s: %.c FORCE | |
115 | $(call rule_mkdir) | |
116 | $(call if_changed_dep,cc_s_c) | |
117 | ||
c819e2cf JO |
118 | # Gather build data: |
119 | # obj-y - list of build objects | |
120 | # subdir-y - list of directories to nest | |
121 | # subdir-obj-y - list of directories objects 'dir/$(obj)-in.o' | |
122 | obj-y := $($(obj)-y) | |
123 | subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y))) | |
124 | obj-y := $(patsubst %/, %/$(obj)-in.o, $(obj-y)) | |
125 | subdir-obj-y := $(filter %/$(obj)-in.o, $(obj-y)) | |
126 | ||
127 | # '$(OUTPUT)/dir' prefix to all objects | |
75e84ab9 LW |
128 | objprefix := $(subst ./,,$(OUTPUT)$(dir)/) |
129 | obj-y := $(addprefix $(objprefix),$(obj-y)) | |
130 | subdir-obj-y := $(addprefix $(objprefix),$(subdir-obj-y)) | |
c819e2cf JO |
131 | |
132 | # Final '$(obj)-in.o' object | |
75e84ab9 | 133 | in-target := $(objprefix)$(obj)-in.o |
c819e2cf JO |
134 | |
135 | PHONY += $(subdir-y) | |
136 | ||
137 | $(subdir-y): | |
ceed252f | 138 | $(Q)$(MAKE) -f $(build-dir)/Makefile.build dir=$(dir)/$@ obj=$(obj) |
c819e2cf JO |
139 | |
140 | $(sort $(subdir-obj-y)): $(subdir-y) ; | |
141 | ||
142 | $(in-target): $(obj-y) FORCE | |
143 | $(call rule_mkdir) | |
0c3b7e42 | 144 | $(call if_changed,$(host)ld_multi) |
c819e2cf JO |
145 | |
146 | __build: $(in-target) | |
147 | @: | |
148 | ||
149 | PHONY += FORCE | |
150 | FORCE: | |
151 | ||
152 | # Include all cmd files to get all the dependency rules | |
153 | # for all objects included | |
1999307b | 154 | targets := $(wildcard $(sort $(obj-y) $(in-target) $(MAKECMDGOALS))) |
c819e2cf JO |
155 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
156 | ||
157 | ifneq ($(cmd_files),) | |
158 | include $(cmd_files) | |
159 | endif | |
160 | ||
161 | .PHONY: $(PHONY) |