Annotation of /trunk/mkinitrd-magellan/klibc/scripts/Kbuild.klibc
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Revision 843 -
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Mon May 4 17:22:31 2009 UTC (15 years ago) by niro
File size: 13607 byte(s)
Mon May 4 17:22:31 2009 UTC (15 years ago) by niro
File size: 13607 byte(s)
-applied klibc-1.5.15-fix-2.6.29-includes.patch to fix include issues with linux-2.6.29
1 | niro | 532 | # ========================================================================== |
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 .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 | KLIBCARCHREQFLAGS := | ||
71 | KLIBCOPTFLAGS := | ||
72 | KLIBCWARNFLAGS := -W -Wall -Wno-sign-compare -Wno-unused-parameter | ||
73 | KLIBCSHAREDFLAGS := | ||
74 | KLIBCBITSIZE := | ||
75 | KLIBCLDFLAGS := | ||
76 | KLIBCCFLAGS := | ||
77 | |||
78 | # Arch specific definitions for klibc | ||
79 | include $(KLIBCSRC)/arch/$(KLIBCARCHDIR)/MCONFIG | ||
80 | |||
81 | # include/asm-* architecture | ||
82 | KLIBCASMARCH ?= $(KLIBCARCH) | ||
83 | |||
84 | # klibc version | ||
85 | KLIBCMAJOR := $(shell cut -d. -f1 $(srctree)/usr/klibc/version) | ||
86 | KLIBCMINOR := $(shell cut -d. -f2 $(srctree)/usr/klibc/version) | ||
87 | |||
88 | # binutils | ||
89 | KLIBCLD := $(LD) | ||
90 | KLIBCCC := $(CC) | ||
91 | KLIBCAR := $(AR) | ||
92 | KLIBCRANLIB := $(RANLIB) | ||
93 | KLIBCSTRIP := $(STRIP) | ||
94 | KLIBCNM := $(NM) | ||
95 | KLIBCOBJCOPY := $(OBJCOPY) | ||
96 | KLIBCOBJDUMP := $(OBJDUMP) | ||
97 | |||
98 | # klibc include paths | ||
99 | KLIBCCPPFLAGS := -nostdinc -iwithprefix include \ | ||
100 | -I$(KLIBCINC)/arch/$(KLIBCARCHDIR) \ | ||
101 | -I$(KLIBCINC)/bits$(KLIBCBITSIZE) \ | ||
102 | -I$(KLIBCOBJ)/../include \ | ||
103 | -I$(KLIBCINC) | ||
104 | # kernel include paths | ||
105 | KLIBCKERNELSRC ?= $(srctree)/ | ||
106 | niro | 843 | KLIBCCPPFLAGS += -I$(KLIBCKERNELSRC)include -I$(KLIBCKERNELSRC)arch/x86/include \ |
107 | niro | 532 | $(if $(KBUILD_SRC),-I$(KLIBCKERNELOBJ)include2 -I$(KLIBCKERNELOBJ)include -I$(srctree)/include) \ |
108 | $(KLIBCARCHINCFLAGS) | ||
109 | |||
110 | # klibc definitions | ||
111 | KLIBCDEFS += -D__KLIBC__=$(KLIBCMAJOR) \ | ||
112 | -D__KLIBC_MINOR__=$(KLIBCMINOR) \ | ||
113 | -D_BITSIZE=$(KLIBCBITSIZE) | ||
114 | KLIBCCPPFLAGS += $(KLIBCDEFS) | ||
115 | KLIBCCFLAGS += $(KLIBCCPPFLAGS) $(KLIBCREQFLAGS) $(KLIBCARCHREQFLAGS) \ | ||
116 | $(KLIBCOPTFLAGS) $(KLIBCWARNFLAGS) | ||
117 | KLIBCAFLAGS += -D__ASSEMBLY__ $(KLIBCCFLAGS) | ||
118 | KLIBCSTRIPFLAGS += --strip-all -R .comment -R .note | ||
119 | |||
120 | KLIBCLIBGCC_DEF := $(shell $(KLIBCCC) $(KLIBCCFLAGS) --print-libgcc) | ||
121 | KLIBCLIBGCC ?= $(KLIBCLIBGCC_DEF) | ||
122 | KLIBCCRT0 := $(KLIBCOBJ)/arch/$(KLIBCARCHDIR)/crt0.o | ||
123 | KLIBCLIBC := $(KLIBCOBJ)/libc.a | ||
124 | KLIBCCRTSHARED := $(KLIBCOBJ)/interp.o | ||
125 | KLIBCLIBCSHARED := $(KLIBCOBJ)/libc.so | ||
126 | # How to tell the linker main() is the entrypoint | ||
127 | KLIBCEMAIN ?= -e main | ||
128 | |||
129 | # | ||
130 | # This indicates the location of the final version of the shared library. | ||
131 | # THIS MUST BE AN ABSOLUTE PATH WITH NO FINAL SLASH. | ||
132 | # Leave this empty to make it the root. | ||
133 | # | ||
134 | SHLIBDIR = /lib | ||
135 | |||
136 | export KLIBCLD KLIBCCC KLIBCAR KLIBCSTRIP KLIBCNM | ||
137 | export KLIBCCFLAGS KLIBCAFLAGS KLIBCLIBGCC KLIBCSHAREDFLAGS KLIBCSTRIPFLAGS | ||
138 | export KLIBCCRT0 KLIBCLIBC SHLIBDIR | ||
139 | |||
140 | # kernel configuration | ||
141 | include .config | ||
142 | |||
143 | # Add $(obj)/ for paths that is not absolute | ||
144 | objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o))) | ||
145 | |||
146 | # Kbuild file in the directory that is being build | ||
147 | include $(obj)/Kbuild | ||
148 | |||
149 | ##### | ||
150 | # static-y + shared-y handling | ||
151 | kprogs := $(static-y) $(shared-y) | ||
152 | # kprogs based on a single .o file (with same name + .o) | ||
153 | kprog-objs := $(foreach p, $(kprogs), $(if $($(p)-y),,$(p))) | ||
154 | kprog-objs := $(addsuffix .o, $(kprog-objs)) | ||
155 | # kprogs which is based on several .o files | ||
156 | kprog-multi := $(foreach p, $(kprogs), $(if $($(p)-y),$(p))) | ||
157 | # objects used for kprogs with more then one .o file | ||
158 | kprog-objs += $(foreach p, $(kprog-multi), $($(p)-y)) | ||
159 | # objects build in this dir | ||
160 | kprog-real-objs := $(patsubst %/,,$(kprog-objs)) | ||
161 | # Directories we need to visit before kprogs-objs are up-to-date | ||
162 | kprog-dirs := $(patsubst %/,%,$(filter %/, $(kprog-objs))) | ||
163 | # replace all dir/ with dir/lib.a | ||
164 | kprog-objs := $(patsubst %/, %/lib.a, $(kprog-objs)) | ||
165 | |||
166 | targets += $(static-y) $(shared-y) | ||
167 | |||
168 | ##### | ||
169 | # klib-y handling | ||
170 | # .o files to build in this dir | ||
171 | klib-real-objs := $(patsubst %/,,$(klib-y)) | ||
172 | # Directories we need to visit before libs are up-to-date | ||
173 | klib-dirs := $(patsubst %/,%,$(filter %/, $(klib-y))) | ||
174 | # replace all dir/ with dir/klib.list | ||
175 | klib-objs := $(patsubst %/, %/klib.list, $(klib-y)) | ||
176 | |||
177 | # $(output-dirs) are a list of directories that contain object files | ||
178 | output-dirs := $(dir $(kprog-dirs) $(kprog-objs)) | ||
179 | output-dirs += $(foreach f, $(hostprogs-y) $(targets), \ | ||
180 | $(if $(dir $(f)), $(dir $(f)))) | ||
181 | output-dirs += $(dir $(klib-objs)) | ||
182 | output-dirs := $(strip $(sort $(filter-out ./,$(output-dirs)))) | ||
183 | |||
184 | # prefix so we get full dir | ||
185 | static-y := $(addprefix $(obj)/,$(static-y)) | ||
186 | shared-y := $(addprefix $(obj)/,$(shared-y)) | ||
187 | kprog-objs := $(addprefix $(obj)/,$(kprog-objs)) | ||
188 | kprog-real-objs := $(addprefix $(obj)/,$(kprog-real-objs)) | ||
189 | output-dirs := $(addprefix $(obj)/,$(output-dirs)) | ||
190 | kprog-dirs := $(addprefix $(obj)/,$(kprog-dirs)) | ||
191 | subdir-y := $(addprefix $(obj)/,$(subdir-y)) | ||
192 | always := $(addprefix $(obj)/,$(always)) | ||
193 | targets := $(addprefix $(obj)/,$(targets)) | ||
194 | lib-y := $(addprefix $(obj)/,$(lib-y)) | ||
195 | klib-y := $(addprefix $(obj)/,$(klib-y)) | ||
196 | klib-objs := $(addprefix $(obj)/,$(klib-objs)) | ||
197 | klib-real-objs := $(addprefix $(obj)/,$(klib-real-objs)) | ||
198 | klib-dirs := $(addprefix $(obj)/,$(klib-dirs)) | ||
199 | |||
200 | ##### | ||
201 | # Handle options to gcc. Support building with separate output directory | ||
202 | |||
203 | __klibccflags = $(KLIBCCFLAGS) $(EXTRA_KLIBCCFLAGS) $(KLIBCCFLAGS_$(*F).o) | ||
204 | __klibcaflags = $(KLIBCAFLAGS) $(EXTRA_KLIBCAFLAGS) $(KLIBCAFLAGS_$(*F).o) | ||
205 | |||
206 | ifeq ($(KBUILD_SRC),) | ||
207 | _klibccflags = $(__klibccflags) | ||
208 | _klibcaflags = $(__klibcaflags) | ||
209 | else | ||
210 | _klibccflags = $(call flags,__klibccflags) | ||
211 | _klibcaflags = $(call flags,__klibcaflags) | ||
212 | endif | ||
213 | |||
214 | klibccflags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(_klibccflags) | ||
215 | klibcaflags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(_klibcaflags) | ||
216 | |||
217 | # Create output directory if not already present | ||
218 | _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) | ||
219 | |||
220 | # Create directories for object files if directory does not exist | ||
221 | # Needed when lib-y := dir/file.o syntax is used | ||
222 | _dummy := $(foreach d,$(output-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) | ||
223 | |||
224 | # Do we have to make a lib.a in this dir? | ||
225 | ifneq ($(strip $(lib-y) $(lib-n) $(lib-)),) | ||
226 | lib-target := $(obj)/lib.a | ||
227 | endif | ||
228 | |||
229 | __build: $(subdir-y) $(lib-target) $(always) | ||
230 | $(Q): | ||
231 | |||
232 | # Compile C sources (.c) | ||
233 | # --------------------------------------------------------------------------- | ||
234 | |||
235 | quiet_cmd_cc_s_c = KLIBCCC $@ | ||
236 | cmd_cc_s_c = $(KLIBCCC) $(klibccflags) -S -o $@ $< | ||
237 | |||
238 | %.s: %.c FORCE | ||
239 | $(call if_changed_dep,cc_s_c) | ||
240 | |||
241 | quiet_cmd_cc_o_c = KLIBCCC $@ | ||
242 | cmd_cc_o_c = $(KLIBCCC) $(klibccflags) -c -o $@ $< | ||
243 | |||
244 | %.o: %.c FORCE | ||
245 | $(call if_changed_dep,cc_o_c) | ||
246 | |||
247 | quiet_cmd_cc_i_c = CPP $@ | ||
248 | cmd_cc_i_c = $(KLIBCCC) -E $(klibccflags) -o $@ $< | ||
249 | %.i: %.c FORCE | ||
250 | $(call if_changed_dep,cc_i_c) | ||
251 | |||
252 | # Compile assembler sources (.S) | ||
253 | # --------------------------------------------------------------------------- | ||
254 | |||
255 | quiet_cmd_as_o_S = KLIBCAS $@ | ||
256 | cmd_as_o_S = $(KLIBCCC) $(klibcaflags) -c -o $@ $< | ||
257 | |||
258 | %.o: %.S FORCE | ||
259 | $(call if_changed_dep,as_o_S) | ||
260 | |||
261 | targets += $(real-objs-y) | ||
262 | |||
263 | # | ||
264 | # Rule to compile a set of .o files into one .o file | ||
265 | # | ||
266 | ifdef lib-target | ||
267 | quiet_cmd_link_o_target = LD $@ | ||
268 | # If the list of objects to link is empty, just create an empty lib.a | ||
269 | cmd_link_o_target = $(if $(strip $(lib-y)),\ | ||
270 | rm -f $@; $(KLIBCAR) cru $@ $(filter $(lib-y), $^),\ | ||
271 | rm -f $@; $(KLIBCAR) crs $@) | ||
272 | |||
273 | $(lib-target): $(lib-y) FORCE | ||
274 | $(call if_changed,link_o_target) | ||
275 | targets += $(lib-target) $(lib-y) | ||
276 | endif # lib-target | ||
277 | |||
278 | # | ||
279 | # Create klib.list | ||
280 | # | ||
281 | # Do we have to create a klibc library file in this dir? | ||
282 | ifneq ($(strip $(klib-y) $(klib-n) $(klib-)),) | ||
283 | klib-target := $(obj)/klib.list | ||
284 | endif | ||
285 | |||
286 | ifdef klib-target | ||
287 | # include this in build | ||
288 | __build: $(klib-target) $(klib-dirs) | ||
289 | |||
290 | # descend if needed | ||
291 | $(sort $(addsuffix /klib.list,$(klib-dirs))): $(klib-dirs) ; | ||
292 | |||
293 | # create klib.list | ||
294 | quiet_cmd_klib-list = LIST $@ | ||
295 | cmd_klib-list = echo $(klib-real-objs) > $@ | ||
296 | $(klib-target): $(klib-objs) FORCE | ||
297 | $(call if_changed,klib-list) | ||
298 | targets += $(klib-target) $(klib-real-objs) | ||
299 | endif # klib-target | ||
300 | |||
301 | ifdef kprogs | ||
302 | # Compile klibc-programs for the target | ||
303 | # =========================================================================== | ||
304 | |||
305 | __build : $(kprog-dirs) $(static-y) $(shared-y) | ||
306 | |||
307 | # Descend if needed | ||
308 | $(sort $(addsuffix /lib.a,$(kprog-dirs))): $(kprog-dirs) ; | ||
309 | |||
310 | # Define dependencies for link of progs | ||
311 | # For the simple program: | ||
312 | # file.o => file | ||
313 | # A program with multiple objects | ||
314 | # filea.o, fileb.o => file | ||
315 | # A program with .o files in another dir | ||
316 | # dir/lib.a filea.o => file | ||
317 | |||
318 | stripobj = $(subst $(obj)/,,$@) | ||
319 | addliba = $(addprefix $(obj)/, $(patsubst %/, %/lib.a, $(1))) | ||
320 | link-deps = $(if $($(stripobj)-y), $(call addliba, $($(stripobj)-y)), $@.o) \ | ||
321 | $(call objectify,$($(stripobj)-lib)) | ||
322 | |||
323 | quiet_cmd_ld-static = KLIBCLD $@ | ||
324 | cmd_ld-static = $(KLIBCLD) $(KLIBCLDFLAGS) -o $@ \ | ||
325 | $(EXTRA_KLIBCLDFLAGS) \ | ||
326 | $(KLIBCCRT0) \ | ||
327 | --start-group \ | ||
328 | $(link-deps) \ | ||
329 | $(KLIBCLIBC) \ | ||
330 | $(KLIBCLIBGCC) \ | ||
331 | --end-group ; \ | ||
332 | cp -f $@ $@.g ; \ | ||
333 | $(KLIBCSTRIP) $(KLIBCSTRIPFLAGS) $@ | ||
334 | |||
335 | |||
336 | $(static-y): $(kprog-objs) $(lib-target) $(KLIBCCRT0) $(KLIBCLIBC) FORCE | ||
337 | $(call if_changed,ld-static) | ||
338 | |||
339 | quiet_cmd_ld-shared = KLIBCLD $@ | ||
340 | cmd_ld-shared = $(KLIBCLD) $(KLIBCLDFLAGS) -o $@ \ | ||
341 | $(EXTRA_KLIBCLDFLAGS) \ | ||
342 | $(KLIBCEMAIN) $(KLIBCCRTSHARED) \ | ||
343 | --start-group \ | ||
344 | $(link-deps) \ | ||
345 | -R $(KLIBCLIBCSHARED) \ | ||
346 | $(KLIBCLIBGCC) \ | ||
347 | --end-group ; \ | ||
348 | cp -f $@ $@.g ; \ | ||
349 | $(KLIBCSTRIP) $(KLIBCSTRIPFLAGS) $@ | ||
350 | |||
351 | |||
352 | $(shared-y): $(kprog-objs) $(lib-target) $(KLIBCCRTSHARED) \ | ||
353 | $(KLIBCLIBCSHARED) FORCE | ||
354 | $(call if_changed,ld-shared) | ||
355 | |||
356 | # Do not try to build KLIBC libaries if we are building klibc | ||
357 | ifeq ($(klibc-build),) | ||
358 | $(KLIBCCRT0) $(KLIBCLIBC): ; | ||
359 | $(KLIBCCRTSHARED) $(KLIBCLIBCSHARED): ; | ||
360 | endif | ||
361 | |||
362 | targets += $(kprog-real-objs) | ||
363 | endif | ||
364 | |||
365 | # Compile programs on the host | ||
366 | # =========================================================================== | ||
367 | ifdef hostprogs-y | ||
368 | include $(srctree)/scripts/Makefile.host | ||
369 | endif | ||
370 | |||
371 | # Descending | ||
372 | # --------------------------------------------------------------------------- | ||
373 | |||
374 | .PHONY: $(subdir-y) $(kprog-dirs) $(klib-dirs) | ||
375 | $(sort $(subdir-y) $(kprog-dirs) $(klib-dirs)): $(lib-target) | ||
376 | $(Q)$(MAKE) $(klibc)=$@ | ||
377 | |||
378 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | ||
379 | # --------------------------------------------------------------------------- | ||
380 | |||
381 | .PHONY: FORCE | ||
382 | |||
383 | FORCE: | ||
384 | |||
385 | # Linking | ||
386 | # Create a reloctable composite object file | ||
387 | # --------------------------------------------------------------------------- | ||
388 | quiet_cmd_klibcld = KLIBCLD $@ | ||
389 | cmd_klibcld = $(KLIBCLD) -r $(KLIBCLDFLAGS) \ | ||
390 | $(EXTRA_KLIBCLDFLAGS) $(KLIBCLDFLAGS_$(@F)) \ | ||
391 | $(filter-out FORCE,$^) -o $@ | ||
392 | |||
393 | |||
394 | # Link target to a new name | ||
395 | # --------------------------------------------------------------------------- | ||
396 | quiet_cmd_ln = LN $@ | ||
397 | cmd_ln = rm -f $@ && ln $< $@ | ||
398 | |||
399 | # Strip target (remove all debugging info) | ||
400 | quiet_cmd_strip = STRIP $@ | ||
401 | cmd_strip = $(KLIBCSTRIP) $(KLIBCSTRIPFLAGS) $< -o $@ | ||
402 | |||
403 | |||
404 | # Read all saved command lines and dependencies for the $(targets) we | ||
405 | # may be building above, using $(if_changed{,_dep}). As an | ||
406 | # optimization, we don't need to read them if the target does not | ||
407 | # exist, we will rebuild anyway in that case. | ||
408 | targets := $(wildcard $(sort $(targets))) | ||
409 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | ||
410 | |||
411 | ifneq ($(cmd_files),) | ||
412 | include $(cmd_files) | ||
413 | endif | ||
414 | |||
415 | # Shorthand for $(Q)$(MAKE) -f scripts/Kbuild.klibc obj | ||
416 | # Usage: | ||
417 | # $(Q)$(MAKE) $(klibc)=dir | ||
418 | klibc := -rR -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Kbuild.klibc obj |