Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/scripts/Makefile.build
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File size: 10017 byte(s)
Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File size: 10017 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | # ========================================================================== |
2 | # Building |
3 | # ========================================================================== |
4 | |
5 | src := $(obj) |
6 | |
7 | .PHONY: __build |
8 | __build: |
9 | |
10 | # Read .config if it exist, otherwise ignore |
11 | -include .config |
12 | |
13 | include $(if $(wildcard $(obj)/Kbuild), $(obj)/Kbuild, $(obj)/Makefile) |
14 | |
15 | include scripts/Makefile.lib |
16 | |
17 | ifdef host-progs |
18 | ifneq ($(hostprogs-y),$(host-progs)) |
19 | $(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) |
20 | hostprogs-y += $(host-progs) |
21 | endif |
22 | endif |
23 | |
24 | # Do not include host rules unles needed |
25 | ifneq ($(hostprogs-y)$(hostprogs-m),) |
26 | include scripts/Makefile.host |
27 | endif |
28 | |
29 | ifneq ($(KBUILD_SRC),) |
30 | # Create output directory if not already present |
31 | _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) |
32 | |
33 | # Create directories for object files if directory does not exist |
34 | # Needed when obj-y := dir/file.o syntax is used |
35 | _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) |
36 | endif |
37 | |
38 | |
39 | ifdef EXTRA_TARGETS |
40 | $(warning kbuild: $(obj)/Makefile - Usage of EXTRA_TARGETS is obsolete in 2.6. Please fix!) |
41 | endif |
42 | |
43 | ifdef build-targets |
44 | $(warning kbuild: $(obj)/Makefile - Usage of build-targets is obsolete in 2.6. Please fix!) |
45 | endif |
46 | |
47 | ifdef export-objs |
48 | $(warning kbuild: $(obj)/Makefile - Usage of export-objs is obsolete in 2.6. Please fix!) |
49 | endif |
50 | |
51 | ifdef O_TARGET |
52 | $(warning kbuild: $(obj)/Makefile - Usage of O_TARGET := $(O_TARGET) is obsolete in 2.6. Please fix!) |
53 | endif |
54 | |
55 | ifdef L_TARGET |
56 | $(error kbuild: $(obj)/Makefile - Use of L_TARGET is replaced by lib-y in 2.6. Please fix!) |
57 | endif |
58 | |
59 | ifdef list-multi |
60 | $(warning kbuild: $(obj)/Makefile - list-multi := $(list-multi) is obsolete in 2.6. Please fix!) |
61 | endif |
62 | |
63 | ifndef obj |
64 | $(warning kbuild: Makefile.build is included improperly) |
65 | endif |
66 | |
67 | # =========================================================================== |
68 | |
69 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),) |
70 | lib-target := $(obj)/lib.a |
71 | endif |
72 | |
73 | ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(lib-target)),) |
74 | builtin-target := $(obj)/built-in.o |
75 | endif |
76 | |
77 | # We keep a list of all modules in $(MODVERDIR) |
78 | |
79 | __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ |
80 | $(if $(KBUILD_MODULES),$(obj-m)) \ |
81 | $(subdir-ym) $(always) |
82 | @: |
83 | |
84 | # Linus' kernel sanity checking tool |
85 | ifneq ($(KBUILD_CHECKSRC),0) |
86 | ifeq ($(KBUILD_CHECKSRC),2) |
87 | quiet_cmd_force_checksrc = CHECK $< |
88 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
89 | else |
90 | quiet_cmd_checksrc = CHECK $< |
91 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
92 | endif |
93 | endif |
94 | |
95 | |
96 | # Compile C sources (.c) |
97 | # --------------------------------------------------------------------------- |
98 | |
99 | # Default is built-in, unless we know otherwise |
100 | modkern_cflags := $(CFLAGS_KERNEL) |
101 | quiet_modtag := $(empty) $(empty) |
102 | |
103 | $(real-objs-m) : modkern_cflags := $(CFLAGS_MODULE) |
104 | $(real-objs-m:.o=.i) : modkern_cflags := $(CFLAGS_MODULE) |
105 | $(real-objs-m:.o=.s) : modkern_cflags := $(CFLAGS_MODULE) |
106 | $(real-objs-m:.o=.lst): modkern_cflags := $(CFLAGS_MODULE) |
107 | |
108 | $(real-objs-m) : quiet_modtag := [M] |
109 | $(real-objs-m:.o=.i) : quiet_modtag := [M] |
110 | $(real-objs-m:.o=.s) : quiet_modtag := [M] |
111 | $(real-objs-m:.o=.lst): quiet_modtag := [M] |
112 | |
113 | $(obj-m) : quiet_modtag := [M] |
114 | |
115 | # Default for not multi-part modules |
116 | modname = $(*F) |
117 | |
118 | $(multi-objs-m) : modname = $(modname-multi) |
119 | $(multi-objs-m:.o=.i) : modname = $(modname-multi) |
120 | $(multi-objs-m:.o=.s) : modname = $(modname-multi) |
121 | $(multi-objs-m:.o=.lst) : modname = $(modname-multi) |
122 | $(multi-objs-y) : modname = $(modname-multi) |
123 | $(multi-objs-y:.o=.i) : modname = $(modname-multi) |
124 | $(multi-objs-y:.o=.s) : modname = $(modname-multi) |
125 | $(multi-objs-y:.o=.lst) : modname = $(modname-multi) |
126 | |
127 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ |
128 | cmd_cc_s_c = $(CC) $(c_flags) -S -o $@ $< |
129 | |
130 | %.s: %.c FORCE |
131 | $(call if_changed_dep,cc_s_c) |
132 | |
133 | quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@ |
134 | cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $< |
135 | |
136 | %.i: %.c FORCE |
137 | $(call if_changed_dep,cc_i_c) |
138 | |
139 | # C (.c) files |
140 | # The C file is compiled and updated dependency information is generated. |
141 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) |
142 | |
143 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ |
144 | |
145 | ifndef CONFIG_MODVERSIONS |
146 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
147 | |
148 | else |
149 | # When module versioning is enabled the following steps are executed: |
150 | # o compile a .tmp_<file>.o from <file>.c |
151 | # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does |
152 | # not export symbols, we just rename .tmp_<file>.o to <file>.o and |
153 | # are done. |
154 | # o otherwise, we calculate symbol versions using the good old |
155 | # genksyms on the preprocessed source and postprocess them in a way |
156 | # that they are usable as a linker script |
157 | # o generate <file>.o from .tmp_<file>.o using the linker to |
158 | # replace the unresolved symbols __crc_exported_symbol with |
159 | # the actual value of the checksum generated by genksyms |
160 | |
161 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< |
162 | cmd_modversions = \ |
163 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
164 | $(CPP) -D__GENKSYMS__ $(c_flags) $< \ |
165 | | $(GENKSYMS) \ |
166 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
167 | \ |
168 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ |
169 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
170 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ |
171 | else \ |
172 | mv $(@D)/.tmp_$(@F) $@; \ |
173 | fi; |
174 | endif |
175 | |
176 | define rule_cc_o_c |
177 | $(if $($(quiet)cmd_checksrc),echo ' $($(quiet)cmd_checksrc)';) \ |
178 | $(cmd_checksrc) \ |
179 | $(if $($(quiet)cmd_cc_o_c),echo ' $($(quiet)cmd_cc_o_c)';) \ |
180 | $(cmd_cc_o_c); \ |
181 | $(cmd_modversions) \ |
182 | scripts/basic/fixdep $(depfile) $@ '$(cmd_cc_o_c)' > $(@D)/.$(@F).tmp; \ |
183 | rm -f $(depfile); \ |
184 | mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd |
185 | endef |
186 | |
187 | # Built-in and composite module parts |
188 | |
189 | %.o: %.c FORCE |
190 | $(call cmd,force_checksrc) |
191 | $(call if_changed_rule,cc_o_c) |
192 | |
193 | # Single-part modules are special since we need to mark them in $(MODVERDIR) |
194 | |
195 | $(single-used-m): %.o: %.c FORCE |
196 | $(call cmd,force_checksrc) |
197 | $(call if_changed_rule,cc_o_c) |
198 | @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod) |
199 | |
200 | quiet_cmd_cc_lst_c = MKLST $@ |
201 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ |
202 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ |
203 | System.map $(OBJDUMP) > $@ |
204 | |
205 | %.lst: %.c FORCE |
206 | $(call if_changed_dep,cc_lst_c) |
207 | |
208 | # Compile assembler sources (.S) |
209 | # --------------------------------------------------------------------------- |
210 | |
211 | modkern_aflags := $(AFLAGS_KERNEL) |
212 | |
213 | $(real-objs-m) : modkern_aflags := $(AFLAGS_MODULE) |
214 | $(real-objs-m:.o=.s): modkern_aflags := $(AFLAGS_MODULE) |
215 | |
216 | quiet_cmd_as_s_S = CPP $(quiet_modtag) $@ |
217 | cmd_as_s_S = $(CPP) $(a_flags) -o $@ $< |
218 | |
219 | %.s: %.S FORCE |
220 | $(call if_changed_dep,as_s_S) |
221 | |
222 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ |
223 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
224 | |
225 | %.o: %.S FORCE |
226 | $(call if_changed_dep,as_o_S) |
227 | |
228 | targets += $(real-objs-y) $(real-objs-m) $(lib-y) |
229 | targets += $(extra-y) $(MAKECMDGOALS) $(always) |
230 | |
231 | # Linker scripts preprocessor (.lds.S -> .lds) |
232 | # --------------------------------------------------------------------------- |
233 | quiet_cmd_cpp_lds_S = LDS $@ |
234 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -D__ASSEMBLY__ -o $@ $< |
235 | |
236 | %.lds: %.lds.S FORCE |
237 | $(call if_changed_dep,cpp_lds_S) |
238 | |
239 | # Build the compiled-in targets |
240 | # --------------------------------------------------------------------------- |
241 | |
242 | # To build objects in subdirs, we need to descend into the directories |
243 | $(sort $(subdir-obj-y)): $(subdir-ym) ; |
244 | |
245 | # |
246 | # Rule to compile a set of .o files into one .o file |
247 | # |
248 | ifdef builtin-target |
249 | quiet_cmd_link_o_target = LD $@ |
250 | # If the list of objects to link is empty, just create an empty built-in.o |
251 | cmd_link_o_target = $(if $(strip $(obj-y)),\ |
252 | $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^),\ |
253 | rm -f $@; $(AR) rcs $@) |
254 | |
255 | $(builtin-target): $(obj-y) FORCE |
256 | $(call if_changed,link_o_target) |
257 | |
258 | targets += $(builtin-target) |
259 | endif # builtin-target |
260 | |
261 | # |
262 | # Rule to compile a set of .o files into one .a file |
263 | # |
264 | ifdef lib-target |
265 | quiet_cmd_link_l_target = AR $@ |
266 | cmd_link_l_target = rm -f $@; $(AR) $(EXTRA_ARFLAGS) rcs $@ $(lib-y) |
267 | |
268 | $(lib-target): $(lib-y) FORCE |
269 | $(call if_changed,link_l_target) |
270 | |
271 | targets += $(lib-target) |
272 | endif |
273 | |
274 | # |
275 | # Rule to link composite objects |
276 | # |
277 | # Composite objects are specified in kbuild makefile as follows: |
278 | # <composite-object>-objs := <list of .o files> |
279 | # or |
280 | # <composite-object>-y := <list of .o files> |
281 | link_multi_deps = \ |
282 | $(filter $(addprefix $(obj)/, \ |
283 | $($(subst $(obj)/,,$(@:.o=-objs))) \ |
284 | $($(subst $(obj)/,,$(@:.o=-y)))), $^) |
285 | |
286 | quiet_cmd_link_multi-y = LD $@ |
287 | cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) |
288 | |
289 | quiet_cmd_link_multi-m = LD [M] $@ |
290 | cmd_link_multi-m = $(LD) $(ld_flags) $(LDFLAGS_MODULE) -o $@ $(link_multi_deps) |
291 | |
292 | # We would rather have a list of rules like |
293 | # foo.o: $(foo-objs) |
294 | # but that's not so easy, so we rather make all composite objects depend |
295 | # on the set of all their parts |
296 | $(multi-used-y) : %.o: $(multi-objs-y) FORCE |
297 | $(call if_changed,link_multi-y) |
298 | |
299 | $(multi-used-m) : %.o: $(multi-objs-m) FORCE |
300 | $(call if_changed,link_multi-m) |
301 | @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod) |
302 | |
303 | targets += $(multi-used-y) $(multi-used-m) |
304 | |
305 | |
306 | # Descending |
307 | # --------------------------------------------------------------------------- |
308 | |
309 | .PHONY: $(subdir-ym) |
310 | $(subdir-ym): |
311 | $(Q)$(MAKE) $(build)=$@ |
312 | |
313 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
314 | # --------------------------------------------------------------------------- |
315 | |
316 | .PHONY: FORCE |
317 | |
318 | FORCE: |
319 | |
320 | # Read all saved command lines and dependencies for the $(targets) we |
321 | # may be building above, using $(if_changed{,_dep}). As an |
322 | # optimization, we don't need to read them if the target does not |
323 | # exist, we will rebuild anyway in that case. |
324 | |
325 | targets := $(wildcard $(sort $(targets))) |
326 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
327 | |
328 | ifneq ($(cmd_files),) |
329 | include $(cmd_files) |
330 | endif |