]>
Commit | Line | Data |
---|---|---|
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 ($(V),1) | |
15 | quiet = | |
ceed252f | 16 | Q = |
c819e2cf JO |
17 | else |
18 | quiet=quiet_ | |
ceed252f | 19 | Q=@ |
c819e2cf JO |
20 | endif |
21 | ||
e572d088 JP |
22 | ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 |
23 | ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) | |
24 | quiet=silent_ | |
25 | endif | |
26 | else # make-3.8x | |
27 | ifneq ($(filter s% -s%,$(MAKEFLAGS)),) | |
28 | quiet=silent_ | |
29 | endif | |
30 | endif | |
31 | ||
c819e2cf JO |
32 | build-dir := $(srctree)/tools/build |
33 | ||
9fb81323 JO |
34 | # Define $(fixdep) for dep-cmd function |
35 | ifeq ($(OUTPUT),) | |
36 | fixdep := $(build-dir)/fixdep | |
37 | else | |
38 | fixdep := $(OUTPUT)/fixdep | |
39 | endif | |
40 | ||
c819e2cf JO |
41 | # Generic definitions |
42 | include $(build-dir)/Build.include | |
43 | ||
fcfd6611 | 44 | # do not force detected configuration |
64227379 | 45 | -include $(OUTPUT).config-detected |
fcfd6611 | 46 | |
c819e2cf JO |
47 | # Init all relevant variables used in build files so |
48 | # 1) they have correct type | |
49 | # 2) they do not inherit any value from the environment | |
50 | subdir-y := | |
51 | obj-y := | |
52 | subdir-y := | |
53 | subdir-obj-y := | |
54 | ||
55 | # Build definitions | |
56 | build-file := $(dir)/Build | |
d7a3d85e | 57 | -include $(build-file) |
c819e2cf | 58 | |
9352aaba JO |
59 | quiet_cmd_flex = FLEX $@ |
60 | quiet_cmd_bison = BISON $@ | |
61 | ||
579ff6d4 JO |
62 | # Create directory unless it exists |
63 | quiet_cmd_mkdir = MKDIR $(dir $@) | |
64 | cmd_mkdir = mkdir -p $(dir $@) | |
65 | rule_mkdir = $(if $(wildcard $(dir $@)),,@$(call echo-cmd,mkdir) $(cmd_mkdir)) | |
66 | ||
c819e2cf JO |
67 | # Compile command |
68 | quiet_cmd_cc_o_c = CC $@ | |
69 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
70 | ||
0c3b7e42 JO |
71 | quiet_cmd_host_cc_o_c = HOSTCC $@ |
72 | cmd_host_cc_o_c = $(HOSTCC) $(host_c_flags) -c -o $@ $< | |
73 | ||
f61bdc33 WN |
74 | quiet_cmd_cxx_o_c = CXX $@ |
75 | cmd_cxx_o_c = $(CXX) $(cxx_flags) -c -o $@ $< | |
76 | ||
23d43848 MY |
77 | quiet_cmd_cpp_i_c = CPP $@ |
78 | cmd_cpp_i_c = $(CC) $(c_flags) -E -o $@ $< | |
1999307b JO |
79 | |
80 | quiet_cmd_cc_s_c = AS $@ | |
81 | cmd_cc_s_c = $(CC) $(c_flags) -S -o $@ $< | |
82 | ||
237fae79 AH |
83 | quiet_cmd_gen = GEN $@ |
84 | ||
c819e2cf JO |
85 | # Link agregate command |
86 | # If there's nothing to link, create empty $@ object. | |
87 | quiet_cmd_ld_multi = LD $@ | |
88 | cmd_ld_multi = $(if $(strip $(obj-y)),\ | |
0c3b7e42 JO |
89 | $(LD) -r -o $@ $(filter $(obj-y),$^),rm -f $@; $(AR) rcs $@) |
90 | ||
91 | quiet_cmd_host_ld_multi = HOSTLD $@ | |
92 | cmd_host_ld_multi = $(if $(strip $(obj-y)),\ | |
93 | $(HOSTLD) -r -o $@ $(filter $(obj-y),$^),rm -f $@; $(HOSTAR) rcs $@) | |
94 | ||
95 | ifneq ($(filter $(obj),$(hostprogs)),) | |
96 | host = host_ | |
97 | endif | |
c819e2cf JO |
98 | |
99 | # Build rules | |
100 | $(OUTPUT)%.o: %.c FORCE | |
579ff6d4 | 101 | $(call rule_mkdir) |
0c3b7e42 | 102 | $(call if_changed_dep,$(host)cc_o_c) |
c819e2cf | 103 | |
f61bdc33 WN |
104 | $(OUTPUT)%.o: %.cpp FORCE |
105 | $(call rule_mkdir) | |
106 | $(call if_changed_dep,cxx_o_c) | |
107 | ||
c819e2cf | 108 | $(OUTPUT)%.o: %.S FORCE |
579ff6d4 | 109 | $(call rule_mkdir) |
0c3b7e42 | 110 | $(call if_changed_dep,$(host)cc_o_c) |
c819e2cf | 111 | |
1999307b JO |
112 | $(OUTPUT)%.i: %.c FORCE |
113 | $(call rule_mkdir) | |
23d43848 | 114 | $(call if_changed_dep,cpp_i_c) |
1999307b | 115 | |
67678793 | 116 | $(OUTPUT)%.s: %.S FORCE |
1999307b | 117 | $(call rule_mkdir) |
23d43848 | 118 | $(call if_changed_dep,cpp_i_c) |
1999307b JO |
119 | |
120 | $(OUTPUT)%.s: %.c FORCE | |
121 | $(call rule_mkdir) | |
122 | $(call if_changed_dep,cc_s_c) | |
123 | ||
c819e2cf JO |
124 | # Gather build data: |
125 | # obj-y - list of build objects | |
126 | # subdir-y - list of directories to nest | |
127 | # subdir-obj-y - list of directories objects 'dir/$(obj)-in.o' | |
128 | obj-y := $($(obj)-y) | |
129 | subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y))) | |
130 | obj-y := $(patsubst %/, %/$(obj)-in.o, $(obj-y)) | |
131 | subdir-obj-y := $(filter %/$(obj)-in.o, $(obj-y)) | |
132 | ||
133 | # '$(OUTPUT)/dir' prefix to all objects | |
75e84ab9 LW |
134 | objprefix := $(subst ./,,$(OUTPUT)$(dir)/) |
135 | obj-y := $(addprefix $(objprefix),$(obj-y)) | |
136 | subdir-obj-y := $(addprefix $(objprefix),$(subdir-obj-y)) | |
c819e2cf JO |
137 | |
138 | # Final '$(obj)-in.o' object | |
75e84ab9 | 139 | in-target := $(objprefix)$(obj)-in.o |
c819e2cf JO |
140 | |
141 | PHONY += $(subdir-y) | |
142 | ||
143 | $(subdir-y): | |
ceed252f | 144 | $(Q)$(MAKE) -f $(build-dir)/Makefile.build dir=$(dir)/$@ obj=$(obj) |
c819e2cf JO |
145 | |
146 | $(sort $(subdir-obj-y)): $(subdir-y) ; | |
147 | ||
148 | $(in-target): $(obj-y) FORCE | |
149 | $(call rule_mkdir) | |
0c3b7e42 | 150 | $(call if_changed,$(host)ld_multi) |
c819e2cf JO |
151 | |
152 | __build: $(in-target) | |
153 | @: | |
154 | ||
155 | PHONY += FORCE | |
156 | FORCE: | |
157 | ||
158 | # Include all cmd files to get all the dependency rules | |
159 | # for all objects included | |
1999307b | 160 | targets := $(wildcard $(sort $(obj-y) $(in-target) $(MAKECMDGOALS))) |
c819e2cf JO |
161 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
162 | ||
163 | ifneq ($(cmd_files),) | |
164 | include $(cmd_files) | |
165 | endif | |
166 | ||
167 | .PHONY: $(PHONY) |