Contents of /tags/mkinitrd-6_3_0/klibc/scripts/Kbuild.klibc
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Revision 1139 -
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Thu Aug 19 10:14:02 2010 UTC (14 years, 1 month ago) by niro
File size: 13646 byte(s)
Thu Aug 19 10:14:02 2010 UTC (14 years, 1 month ago) by niro
File size: 13646 byte(s)
tagged 'mkinitrd-6_3_0'
1 | # ========================================================================== |
2 | # Support for building klibc programs and klibc library |
3 | # ========================================================================== |
4 | # |
5 | # To create a kbuild file for a userspace program do the following: |
6 | # |
7 | # Kbuild: |
8 | # |
9 | # static-y := cat |
10 | # # This will compile a file named cat.c -> the executable 'cat' |
11 | # # The executable will be linked statically |
12 | # |
13 | # shared-y := cats |
14 | # # This will compile a file named cats.c -> the executable 'cats' |
15 | # # The executable will be linked shared |
16 | # |
17 | # If the userspace program consist of composite files do the following: |
18 | # Kbuild: |
19 | # |
20 | # static-y := kinit |
21 | # kinit-y := main.o netdev.c |
22 | # So kinit will be linked statically using the two .o files |
23 | # specified with kinit-y. |
24 | # |
25 | # Are part of the program located in a sub-directory do like this: |
26 | # kinit-y += ipconfig/ |
27 | # |
28 | # And in the subdirectory: |
29 | # ipconfig/Kbuild: |
30 | # lib-y := packet.o dhcp_proto.o |
31 | # # All .o files listed with lib-y will be used to create a single .a file. |
32 | # # The .a file is created before any subdirectories are visited so it |
33 | # # may be used in the sub-directory programs. |
34 | # |
35 | ##### |
36 | # For a klibc libary file do like this |
37 | # klibc/Kbuild |
38 | # klib-y := error.o pipe.o zlib/ |
39 | # |
40 | ##### |
41 | # Handling of compiler/linker options |
42 | # |
43 | # To set directory wide CFLAGS use: |
44 | # EXTRA_KLIBCCFLAGS := -DDEBUG |
45 | # To set directory wide AFLAGS use: |
46 | # EXTRA_KLIBCAFLAGS := -DDEBUG |
47 | # |
48 | # To set target specific CFLAGS (for .c files) use |
49 | # KLIBCCFLAGS-main.o := -DDEBUG=3 |
50 | # To set target specific AFLAGS (for .s files) use |
51 | # KLIBCAFLAGS-main.o := -DDEBUG=3 |
52 | |
53 | src := $(obj) |
54 | # Preset target and make sure it is a ':=' variable |
55 | targets := |
56 | |
57 | .phony: __build |
58 | __build: |
59 | |
60 | # Read .config if it exist, otherwise ignore |
61 | -include $(objtree)/.config |
62 | |
63 | # Generic Kbuild routines |
64 | include $(srctree)/scripts/Kbuild.include |
65 | |
66 | # Defines used when compiling early userspace (klibc programs) |
67 | # --------------------------------------------------------------------------- |
68 | |
69 | KLIBCREQFLAGS := $(call cc-option, -fno-stack-protector, ) \ |
70 | $(call cc-option, -fwrapv, ) |
71 | KLIBCARCHREQFLAGS := |
72 | KLIBCOPTFLAGS := |
73 | KLIBCWARNFLAGS := -W -Wall -Wno-sign-compare -Wno-unused-parameter |
74 | KLIBCSHAREDFLAGS := |
75 | KLIBCBITSIZE := |
76 | KLIBCLDFLAGS := |
77 | KLIBCCFLAGS := |
78 | |
79 | # Defaults for arch to override |
80 | KLIBCARCHINCFLAGS = -I$(KLIBCKERNELOBJ)/arch/$(KLIBCARCH)/include |
81 | |
82 | # Arch specific definitions for klibc |
83 | include $(srctree)/$(KLIBCSRC)/arch/$(KLIBCARCHDIR)/MCONFIG |
84 | |
85 | # include/asm-* architecture |
86 | KLIBCASMARCH ?= $(KLIBCARCH) |
87 | |
88 | # klibc version |
89 | KLIBCMAJOR := $(shell cut -d. -f1 $(srctree)/usr/klibc/version) |
90 | KLIBCMINOR := $(shell cut -d. -f2 $(srctree)/usr/klibc/version) |
91 | |
92 | # binutils |
93 | KLIBCLD := $(LD) |
94 | KLIBCCC := $(CC) |
95 | KLIBCAR := $(AR) |
96 | KLIBCRANLIB := $(RANLIB) |
97 | KLIBCSTRIP := $(STRIP) |
98 | KLIBCNM := $(NM) |
99 | KLIBCOBJCOPY := $(OBJCOPY) |
100 | KLIBCOBJDUMP := $(OBJDUMP) |
101 | |
102 | # klibc include paths |
103 | KLIBCCPPFLAGS := -nostdinc -iwithprefix include \ |
104 | -I$(KLIBCINC)/arch/$(KLIBCARCHDIR) \ |
105 | -I$(KLIBCINC)/bits$(KLIBCBITSIZE) \ |
106 | -I$(KLIBCOBJ)/../include \ |
107 | -I$(KLIBCINC) |
108 | # kernel include paths |
109 | KLIBCKERNELSRC ?= $(srctree) |
110 | KLIBCKERNELOBJ ?= $(objtree) |
111 | KLIBCCPPFLAGS += -I$(KLIBCKERNELSRC)/include \ |
112 | $(if $(KBUILD_SRC),-I$(KLIBCKERNELOBJ)/include2 \ |
113 | -I$(KLIBCKERNELOBJ)/include -I$(srctree)/include) \ |
114 | $(KLIBCARCHINCFLAGS) |
115 | |
116 | # klibc definitions |
117 | KLIBCDEFS += -D__KLIBC__=$(KLIBCMAJOR) \ |
118 | -D__KLIBC_MINOR__=$(KLIBCMINOR) \ |
119 | -D_BITSIZE=$(KLIBCBITSIZE) |
120 | KLIBCCPPFLAGS += $(KLIBCDEFS) |
121 | KLIBCCFLAGS += $(KLIBCCPPFLAGS) $(KLIBCREQFLAGS) $(KLIBCARCHREQFLAGS) \ |
122 | $(KLIBCOPTFLAGS) $(KLIBCWARNFLAGS) |
123 | KLIBCAFLAGS += -D__ASSEMBLY__ $(KLIBCCFLAGS) |
124 | KLIBCSTRIPFLAGS += --strip-all -R .comment -R .note |
125 | |
126 | KLIBCLIBGCC_DEF := $(shell $(KLIBCCC) $(KLIBCCFLAGS) --print-libgcc) |
127 | KLIBCLIBGCC ?= $(KLIBCLIBGCC_DEF) |
128 | KLIBCCRT0 := $(KLIBCOBJ)/arch/$(KLIBCARCHDIR)/crt0.o |
129 | KLIBCLIBC := $(KLIBCOBJ)/libc.a |
130 | KLIBCCRTSHARED := $(KLIBCOBJ)/interp.o |
131 | KLIBCLIBCSHARED := $(KLIBCOBJ)/libc.so |
132 | # How to tell the linker main() is the entrypoint |
133 | KLIBCEMAIN ?= -e main |
134 | |
135 | # |
136 | # This indicates the location of the final version of the shared library. |
137 | # THIS MUST BE AN ABSOLUTE PATH WITH NO FINAL SLASH. |
138 | # Leave this empty to make it the root. |
139 | # |
140 | SHLIBDIR = /lib |
141 | |
142 | export KLIBCLD KLIBCCC KLIBCAR KLIBCSTRIP KLIBCNM |
143 | export KLIBCCFLAGS KLIBCAFLAGS KLIBCLIBGCC KLIBCSHAREDFLAGS KLIBCSTRIPFLAGS |
144 | export KLIBCCRT0 KLIBCLIBC SHLIBDIR |
145 | |
146 | # Add $(obj)/ for paths that is not absolute |
147 | objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o))) |
148 | |
149 | # Kbuild file in the directory that is being build |
150 | include $(srctree)/$(obj)/Kbuild |
151 | |
152 | ##### |
153 | # static-y + shared-y handling |
154 | kprogs := $(static-y) $(shared-y) |
155 | # kprogs based on a single .o file (with same name + .o) |
156 | kprog-objs := $(foreach p, $(kprogs), $(if $($(p)-y),,$(p))) |
157 | kprog-objs := $(addsuffix .o, $(kprog-objs)) |
158 | # kprogs which is based on several .o files |
159 | kprog-multi := $(foreach p, $(kprogs), $(if $($(p)-y),$(p))) |
160 | # objects used for kprogs with more then one .o file |
161 | kprog-objs += $(foreach p, $(kprog-multi), $($(p)-y)) |
162 | # objects build in this dir |
163 | kprog-real-objs := $(patsubst %/,,$(kprog-objs)) |
164 | # Directories we need to visit before kprogs-objs are up-to-date |
165 | kprog-dirs := $(patsubst %/,%,$(filter %/, $(kprog-objs))) |
166 | # replace all dir/ with dir/lib.a |
167 | kprog-objs := $(patsubst %/, %/lib.a, $(kprog-objs)) |
168 | |
169 | targets += $(static-y) $(shared-y) |
170 | |
171 | ##### |
172 | # klib-y handling |
173 | # .o files to build in this dir |
174 | klib-real-objs := $(patsubst %/,,$(klib-y)) |
175 | # Directories we need to visit before libs are up-to-date |
176 | klib-dirs := $(patsubst %/,%,$(filter %/, $(klib-y))) |
177 | # replace all dir/ with dir/klib.list |
178 | klib-objs := $(patsubst %/, %/klib.list, $(klib-y)) |
179 | |
180 | # $(output-dirs) are a list of directories that contain object files |
181 | output-dirs := $(dir $(kprog-dirs) $(kprog-objs)) |
182 | output-dirs += $(foreach f, $(hostprogs-y) $(targets), \ |
183 | $(if $(dir $(f)), $(dir $(f)))) |
184 | output-dirs += $(dir $(klib-objs)) |
185 | output-dirs := $(strip $(sort $(filter-out ./,$(output-dirs)))) |
186 | |
187 | # prefix so we get full dir |
188 | static-y := $(addprefix $(obj)/,$(static-y)) |
189 | shared-y := $(addprefix $(obj)/,$(shared-y)) |
190 | kprog-objs := $(addprefix $(obj)/,$(kprog-objs)) |
191 | kprog-real-objs := $(addprefix $(obj)/,$(kprog-real-objs)) |
192 | output-dirs := $(addprefix $(obj)/,$(output-dirs)) |
193 | kprog-dirs := $(addprefix $(obj)/,$(kprog-dirs)) |
194 | subdir-y := $(addprefix $(obj)/,$(subdir-y)) |
195 | always := $(addprefix $(obj)/,$(always)) |
196 | targets := $(addprefix $(obj)/,$(targets)) |
197 | lib-y := $(addprefix $(obj)/,$(lib-y)) |
198 | klib-y := $(addprefix $(obj)/,$(klib-y)) |
199 | klib-objs := $(addprefix $(obj)/,$(klib-objs)) |
200 | klib-real-objs := $(addprefix $(obj)/,$(klib-real-objs)) |
201 | klib-dirs := $(addprefix $(obj)/,$(klib-dirs)) |
202 | |
203 | ##### |
204 | # Handle options to gcc. Support building with separate output directory |
205 | |
206 | __klibccflags = $(KLIBCCFLAGS) $(EXTRA_KLIBCCFLAGS) $(KLIBCCFLAGS_$(*F).o) |
207 | __klibcaflags = $(KLIBCAFLAGS) $(EXTRA_KLIBCAFLAGS) $(KLIBCAFLAGS_$(*F).o) |
208 | |
209 | _klibccflags = $(call flags,__klibccflags) |
210 | _klibcaflags = $(call flags,__klibcaflags) |
211 | |
212 | klibccflags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(_klibccflags) |
213 | klibcaflags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(_klibcaflags) |
214 | |
215 | # Create output directory if not already present |
216 | _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) |
217 | |
218 | # Create directories for object files if directory does not exist |
219 | # Needed when lib-y := dir/file.o syntax is used |
220 | _dummy := $(foreach d,$(output-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) |
221 | |
222 | # Do we have to make a lib.a in this dir? |
223 | ifneq ($(strip $(lib-y) $(lib-n) $(lib-)),) |
224 | lib-target := $(obj)/lib.a |
225 | endif |
226 | |
227 | __build: $(subdir-y) $(lib-target) $(always) |
228 | $(Q): |
229 | |
230 | # Compile C sources (.c) |
231 | # --------------------------------------------------------------------------- |
232 | |
233 | quiet_cmd_cc_s_c = KLIBCCC $@ |
234 | cmd_cc_s_c = $(KLIBCCC) $(klibccflags) -S -o $@ $< |
235 | |
236 | %.s: %.c FORCE |
237 | $(call if_changed_dep,cc_s_c) |
238 | |
239 | quiet_cmd_cc_o_c = KLIBCCC $@ |
240 | cmd_cc_o_c = $(KLIBCCC) $(klibccflags) -c -o $@ $< |
241 | |
242 | %.o: %.c FORCE |
243 | $(call if_changed_dep,cc_o_c) |
244 | |
245 | quiet_cmd_cc_i_c = CPP $@ |
246 | cmd_cc_i_c = $(KLIBCCC) -E $(klibccflags) -o $@ $< |
247 | %.i: %.c FORCE |
248 | $(call if_changed_dep,cc_i_c) |
249 | |
250 | # Compile assembler sources (.S) |
251 | # --------------------------------------------------------------------------- |
252 | |
253 | quiet_cmd_as_o_S = KLIBCAS $@ |
254 | cmd_as_o_S = $(KLIBCCC) $(klibcaflags) -c -o $@ $< |
255 | |
256 | %.o: %.S FORCE |
257 | $(call if_changed_dep,as_o_S) |
258 | |
259 | targets += $(real-objs-y) |
260 | |
261 | # |
262 | # Rule to compile a set of .o files into one .o file |
263 | # |
264 | ifdef lib-target |
265 | quiet_cmd_link_o_target = LD $@ |
266 | # If the list of objects to link is empty, just create an empty lib.a |
267 | cmd_link_o_target = $(if $(strip $(lib-y)),\ |
268 | rm -f $@; $(KLIBCAR) cru $@ $(filter $(lib-y), $^),\ |
269 | rm -f $@; $(KLIBCAR) crs $@) |
270 | |
271 | $(lib-target): $(lib-y) FORCE |
272 | $(call if_changed,link_o_target) |
273 | targets += $(lib-target) $(lib-y) |
274 | endif # lib-target |
275 | |
276 | # |
277 | # Create klib.list |
278 | # |
279 | # Do we have to create a klibc library file in this dir? |
280 | ifneq ($(strip $(klib-y) $(klib-n) $(klib-)),) |
281 | klib-target := $(obj)/klib.list |
282 | endif |
283 | |
284 | ifdef klib-target |
285 | # include this in build |
286 | __build: $(klib-target) $(klib-dirs) |
287 | |
288 | # descend if needed |
289 | $(sort $(addsuffix /klib.list,$(klib-dirs))): $(klib-dirs) ; |
290 | |
291 | # create klib.list |
292 | quiet_cmd_klib-list = LIST $@ |
293 | cmd_klib-list = echo $(klib-real-objs) > $@ |
294 | $(klib-target): $(klib-objs) FORCE |
295 | $(call if_changed,klib-list) |
296 | targets += $(klib-target) $(klib-real-objs) |
297 | endif # klib-target |
298 | |
299 | ifdef kprogs |
300 | # Compile klibc-programs for the target |
301 | # =========================================================================== |
302 | |
303 | __build : $(kprog-dirs) $(static-y) $(shared-y) |
304 | |
305 | # Descend if needed |
306 | $(sort $(addsuffix /lib.a,$(kprog-dirs))): $(kprog-dirs) ; |
307 | |
308 | # Define dependencies for link of progs |
309 | # For the simple program: |
310 | # file.o => file |
311 | # A program with multiple objects |
312 | # filea.o, fileb.o => file |
313 | # A program with .o files in another dir |
314 | # dir/lib.a filea.o => file |
315 | |
316 | stripobj = $(subst $(obj)/,,$@) |
317 | addliba = $(addprefix $(obj)/, $(patsubst %/, %/lib.a, $(1))) |
318 | link-deps = $(if $($(stripobj)-y), $(call addliba, $($(stripobj)-y)), $@.o) \ |
319 | $(call objectify,$($(stripobj)-lib)) |
320 | |
321 | quiet_cmd_ld-static = KLIBCLD $@ |
322 | cmd_ld-static = $(KLIBCLD) $(KLIBCLDFLAGS) -o $@ \ |
323 | $(EXTRA_KLIBCLDFLAGS) \ |
324 | $(KLIBCCRT0) \ |
325 | --start-group \ |
326 | $(link-deps) \ |
327 | $(KLIBCLIBC) \ |
328 | $(KLIBCLIBGCC) \ |
329 | --end-group ; \ |
330 | cp -f $@ $@.g ; \ |
331 | $(KLIBCSTRIP) $(KLIBCSTRIPFLAGS) $@ |
332 | |
333 | |
334 | $(static-y): $(kprog-objs) $(lib-target) $(KLIBCCRT0) $(KLIBCLIBC) FORCE |
335 | $(call if_changed,ld-static) |
336 | |
337 | quiet_cmd_ld-shared = KLIBCLD $@ |
338 | cmd_ld-shared = $(KLIBCLD) $(KLIBCLDFLAGS) -o $@ \ |
339 | $(EXTRA_KLIBCLDFLAGS) \ |
340 | $(KLIBCEMAIN) $(KLIBCCRTSHARED) \ |
341 | --start-group \ |
342 | $(link-deps) \ |
343 | -R $(KLIBCLIBCSHARED) \ |
344 | $(KLIBCLIBGCC) \ |
345 | --end-group ; \ |
346 | cp -f $@ $@.g ; \ |
347 | $(KLIBCSTRIP) $(KLIBCSTRIPFLAGS) $@ |
348 | |
349 | |
350 | $(shared-y): $(kprog-objs) $(lib-target) $(KLIBCCRTSHARED) \ |
351 | $(KLIBCLIBCSHARED) FORCE |
352 | $(call if_changed,ld-shared) |
353 | |
354 | # Do not try to build KLIBC libaries if we are building klibc |
355 | ifeq ($(klibc-build),) |
356 | $(KLIBCCRT0) $(KLIBCLIBC): ; |
357 | $(KLIBCCRTSHARED) $(KLIBCLIBCSHARED): ; |
358 | endif |
359 | |
360 | targets += $(kprog-real-objs) |
361 | endif |
362 | |
363 | # Compile programs on the host |
364 | # =========================================================================== |
365 | ifdef hostprogs-y |
366 | include $(srctree)/scripts/Makefile.host |
367 | endif |
368 | |
369 | # Descending |
370 | # --------------------------------------------------------------------------- |
371 | |
372 | .PHONY: $(subdir-y) $(kprog-dirs) $(klib-dirs) |
373 | $(sort $(subdir-y) $(kprog-dirs) $(klib-dirs)): $(lib-target) |
374 | $(Q)$(MAKE) $(klibc)=$@ |
375 | |
376 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
377 | # --------------------------------------------------------------------------- |
378 | |
379 | .PHONY: FORCE |
380 | |
381 | FORCE: |
382 | |
383 | # Linking |
384 | # Create a reloctable composite object file |
385 | # --------------------------------------------------------------------------- |
386 | quiet_cmd_klibcld = KLIBCLD $@ |
387 | cmd_klibcld = $(KLIBCLD) -r $(KLIBCLDFLAGS) \ |
388 | $(EXTRA_KLIBCLDFLAGS) $(KLIBCLDFLAGS_$(@F)) \ |
389 | $(filter-out FORCE,$^) -o $@ |
390 | |
391 | |
392 | # Link target to a new name |
393 | # --------------------------------------------------------------------------- |
394 | quiet_cmd_ln = LN $@ |
395 | cmd_ln = rm -f $@ && ln $< $@ |
396 | |
397 | # Strip target (remove all debugging info) |
398 | quiet_cmd_strip = STRIP $@ |
399 | cmd_strip = $(KLIBCSTRIP) $(KLIBCSTRIPFLAGS) $< -o $@ |
400 | |
401 | |
402 | # Read all saved command lines and dependencies for the $(targets) we |
403 | # may be building above, using $(if_changed{,_dep}). As an |
404 | # optimization, we don't need to read them if the target does not |
405 | # exist, we will rebuild anyway in that case. |
406 | targets := $(wildcard $(sort $(targets))) |
407 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
408 | |
409 | ifneq ($(cmd_files),) |
410 | include $(cmd_files) |
411 | endif |
412 | |
413 | # Shorthand for $(Q)$(MAKE) -f scripts/Kbuild.klibc obj |
414 | # Usage: |
415 | # $(Q)$(MAKE) $(klibc)=dir |
416 | klibc := -rR -f $(srctree)/scripts/Kbuild.klibc obj |