Contents of /trunk/mkinitrd-magellan/klibc/scripts/Kbuild.klibc
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Revision 1297 -
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Fri May 27 15:12:11 2011 UTC (13 years, 4 months ago) by niro
File size: 13901 byte(s)
Fri May 27 15:12:11 2011 UTC (13 years, 4 months ago) by niro
File size: 13901 byte(s)
-updated to klibc-1.5.22 with mntproc definitions patch included
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 | |
97 | # klibc-ar is a macro that invokes KLIBCAR and takes 2 arguments of ar commands. |
98 | # The second will be used for reproducible builds, the first otherwise. |
99 | klibc-ar = $(KLIBCAR) $(if $(KBUILD_REPRODUCIBLE),$(2),$(1)) |
100 | |
101 | KLIBCRANLIB := $(call klibc-ar,s,Ds) |
102 | KLIBCSTRIP := $(STRIP) |
103 | KLIBCNM := $(NM) |
104 | KLIBCOBJCOPY := $(OBJCOPY) |
105 | KLIBCOBJDUMP := $(OBJDUMP) |
106 | |
107 | # klibc include paths |
108 | KLIBCCPPFLAGS := -nostdinc -iwithprefix include \ |
109 | -I$(KLIBCINC)/arch/$(KLIBCARCHDIR) \ |
110 | -I$(KLIBCINC)/bits$(KLIBCBITSIZE) \ |
111 | -I$(KLIBCOBJ)/../include \ |
112 | -I$(KLIBCINC) |
113 | # kernel include paths |
114 | KLIBCKERNELSRC ?= $(srctree) |
115 | KLIBCKERNELOBJ ?= $(objtree) |
116 | KLIBCCPPFLAGS += -I$(KLIBCKERNELSRC)/include \ |
117 | $(if $(KBUILD_SRC),-I$(KLIBCKERNELOBJ)/include2 \ |
118 | -I$(KLIBCKERNELOBJ)/include -I$(srctree)/include) \ |
119 | $(KLIBCARCHINCFLAGS) |
120 | |
121 | # klibc definitions |
122 | KLIBCDEFS += -D__KLIBC__=$(KLIBCMAJOR) \ |
123 | -D__KLIBC_MINOR__=$(KLIBCMINOR) \ |
124 | -D_BITSIZE=$(KLIBCBITSIZE) |
125 | KLIBCCPPFLAGS += $(KLIBCDEFS) |
126 | KLIBCCFLAGS += $(KLIBCCPPFLAGS) $(KLIBCREQFLAGS) $(KLIBCARCHREQFLAGS) \ |
127 | $(KLIBCOPTFLAGS) $(KLIBCWARNFLAGS) |
128 | KLIBCAFLAGS += -D__ASSEMBLY__ $(KLIBCCFLAGS) |
129 | KLIBCSTRIPFLAGS += --strip-all -R .comment -R .note |
130 | |
131 | KLIBCLIBGCC_DEF := $(shell $(KLIBCCC) $(KLIBCCFLAGS) --print-libgcc) |
132 | KLIBCLIBGCC ?= $(KLIBCLIBGCC_DEF) |
133 | KLIBCCRT0 := $(KLIBCOBJ)/arch/$(KLIBCARCHDIR)/crt0.o |
134 | KLIBCLIBC := $(KLIBCOBJ)/libc.a |
135 | KLIBCCRTSHARED := $(KLIBCOBJ)/interp.o |
136 | KLIBCLIBCSHARED := $(KLIBCOBJ)/libc.so |
137 | # How to tell the linker main() is the entrypoint |
138 | KLIBCEMAIN ?= -e main |
139 | |
140 | # |
141 | # This indicates the location of the final version of the shared library. |
142 | # THIS MUST BE AN ABSOLUTE PATH WITH NO FINAL SLASH. |
143 | # Leave this empty to make it the root. |
144 | # |
145 | SHLIBDIR = /lib |
146 | |
147 | export KLIBCLD KLIBCCC KLIBCAR KLIBCSTRIP KLIBCNM |
148 | export KLIBCCFLAGS KLIBCAFLAGS KLIBCLIBGCC KLIBCSHAREDFLAGS KLIBCSTRIPFLAGS |
149 | export KLIBCCRT0 KLIBCLIBC SHLIBDIR |
150 | |
151 | # Add $(obj)/ for paths that is not absolute |
152 | objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o))) |
153 | |
154 | # Kbuild file in the directory that is being build |
155 | include $(srctree)/$(obj)/Kbuild |
156 | |
157 | ##### |
158 | # static-y + shared-y handling |
159 | kprogs := $(static-y) $(shared-y) |
160 | # kprogs based on a single .o file (with same name + .o) |
161 | kprog-objs := $(foreach p, $(kprogs), $(if $($(p)-y),,$(p))) |
162 | kprog-objs := $(addsuffix .o, $(kprog-objs)) |
163 | # kprogs which is based on several .o files |
164 | kprog-multi := $(foreach p, $(kprogs), $(if $($(p)-y),$(p))) |
165 | # objects used for kprogs with more then one .o file |
166 | kprog-objs += $(foreach p, $(kprog-multi), $($(p)-y)) |
167 | # objects build in this dir |
168 | kprog-real-objs := $(patsubst %/,,$(kprog-objs)) |
169 | # Directories we need to visit before kprogs-objs are up-to-date |
170 | kprog-dirs := $(patsubst %/,%,$(filter %/, $(kprog-objs))) |
171 | # replace all dir/ with dir/lib.a |
172 | kprog-objs := $(patsubst %/, %/lib.a, $(kprog-objs)) |
173 | |
174 | targets += $(static-y) $(shared-y) |
175 | |
176 | ##### |
177 | # klib-y handling |
178 | # .o files to build in this dir |
179 | klib-real-objs := $(patsubst %/,,$(klib-y)) |
180 | # Directories we need to visit before libs are up-to-date |
181 | klib-dirs := $(patsubst %/,%,$(filter %/, $(klib-y))) |
182 | # replace all dir/ with dir/klib.list |
183 | klib-objs := $(patsubst %/, %/klib.list, $(klib-y)) |
184 | |
185 | # $(output-dirs) are a list of directories that contain object files |
186 | output-dirs := $(dir $(kprog-dirs) $(kprog-objs)) |
187 | output-dirs += $(foreach f, $(hostprogs-y) $(targets), \ |
188 | $(if $(dir $(f)), $(dir $(f)))) |
189 | output-dirs += $(dir $(klib-objs)) |
190 | output-dirs := $(strip $(sort $(filter-out ./,$(output-dirs)))) |
191 | |
192 | # prefix so we get full dir |
193 | static-y := $(addprefix $(obj)/,$(static-y)) |
194 | shared-y := $(addprefix $(obj)/,$(shared-y)) |
195 | kprog-objs := $(addprefix $(obj)/,$(kprog-objs)) |
196 | kprog-real-objs := $(addprefix $(obj)/,$(kprog-real-objs)) |
197 | output-dirs := $(addprefix $(obj)/,$(output-dirs)) |
198 | kprog-dirs := $(addprefix $(obj)/,$(kprog-dirs)) |
199 | subdir-y := $(addprefix $(obj)/,$(subdir-y)) |
200 | always := $(addprefix $(obj)/,$(always)) |
201 | targets := $(addprefix $(obj)/,$(targets)) |
202 | lib-y := $(addprefix $(obj)/,$(lib-y)) |
203 | klib-y := $(addprefix $(obj)/,$(klib-y)) |
204 | klib-objs := $(addprefix $(obj)/,$(klib-objs)) |
205 | klib-real-objs := $(addprefix $(obj)/,$(klib-real-objs)) |
206 | klib-dirs := $(addprefix $(obj)/,$(klib-dirs)) |
207 | |
208 | ##### |
209 | # Handle options to gcc. Support building with separate output directory |
210 | |
211 | __klibccflags = $(KLIBCCFLAGS) $(EXTRA_KLIBCCFLAGS) $(KLIBCCFLAGS_$(*F).o) |
212 | __klibcaflags = $(KLIBCAFLAGS) $(EXTRA_KLIBCAFLAGS) $(KLIBCAFLAGS_$(*F).o) |
213 | |
214 | _klibccflags = $(call flags,__klibccflags) |
215 | _klibcaflags = $(call flags,__klibcaflags) |
216 | |
217 | klibccflags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(_klibccflags) |
218 | klibcaflags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(_klibcaflags) |
219 | |
220 | # Create output directory if not already present |
221 | _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) |
222 | |
223 | # Create directories for object files if directory does not exist |
224 | # Needed when lib-y := dir/file.o syntax is used |
225 | _dummy := $(foreach d,$(output-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) |
226 | |
227 | # Do we have to make a lib.a in this dir? |
228 | ifneq ($(strip $(lib-y) $(lib-n) $(lib-)),) |
229 | lib-target := $(obj)/lib.a |
230 | endif |
231 | |
232 | __build: $(subdir-y) $(lib-target) $(always) |
233 | $(Q): |
234 | |
235 | # Compile C sources (.c) |
236 | # --------------------------------------------------------------------------- |
237 | |
238 | quiet_cmd_cc_s_c = KLIBCCC $@ |
239 | cmd_cc_s_c = $(KLIBCCC) $(klibccflags) -S -o $@ $< |
240 | |
241 | %.s: %.c FORCE |
242 | $(call if_changed_dep,cc_s_c) |
243 | |
244 | quiet_cmd_cc_o_c = KLIBCCC $@ |
245 | cmd_cc_o_c = $(KLIBCCC) $(klibccflags) -c -o $@ $< |
246 | |
247 | %.o: %.c FORCE |
248 | $(call if_changed_dep,cc_o_c) |
249 | |
250 | quiet_cmd_cc_i_c = CPP $@ |
251 | cmd_cc_i_c = $(KLIBCCC) -E $(klibccflags) -o $@ $< |
252 | %.i: %.c FORCE |
253 | $(call if_changed_dep,cc_i_c) |
254 | |
255 | # Compile assembler sources (.S) |
256 | # --------------------------------------------------------------------------- |
257 | |
258 | quiet_cmd_as_o_S = KLIBCAS $@ |
259 | cmd_as_o_S = $(KLIBCCC) $(klibcaflags) -c -o $@ $< |
260 | |
261 | %.o: %.S FORCE |
262 | $(call if_changed_dep,as_o_S) |
263 | |
264 | targets += $(real-objs-y) |
265 | |
266 | # |
267 | # Rule to compile a set of .o files into one .o file |
268 | # |
269 | ifdef lib-target |
270 | quiet_cmd_link_o_target = LD $@ |
271 | # If the list of objects to link is empty, just create an empty lib.a |
272 | cmd_link_o_target = $(if $(strip $(lib-y)),\ |
273 | rm -f $@; $(call klibc-ar,cru,Dcr) $@ $(filter $(lib-y), $^),\ |
274 | rm -f $@; $(call klibc-ar,crs,Dcrs) $@) |
275 | |
276 | $(lib-target): $(lib-y) FORCE |
277 | $(call if_changed,link_o_target) |
278 | targets += $(lib-target) $(lib-y) |
279 | endif # lib-target |
280 | |
281 | # |
282 | # Create klib.list |
283 | # |
284 | # Do we have to create a klibc library file in this dir? |
285 | ifneq ($(strip $(klib-y) $(klib-n) $(klib-)),) |
286 | klib-target := $(obj)/klib.list |
287 | endif |
288 | |
289 | ifdef klib-target |
290 | # include this in build |
291 | __build: $(klib-target) $(klib-dirs) |
292 | |
293 | # descend if needed |
294 | $(sort $(addsuffix /klib.list,$(klib-dirs))): $(klib-dirs) ; |
295 | |
296 | # create klib.list |
297 | quiet_cmd_klib-list = LIST $@ |
298 | cmd_klib-list = echo $(klib-real-objs) > $@ |
299 | $(klib-target): $(klib-objs) FORCE |
300 | $(call if_changed,klib-list) |
301 | targets += $(klib-target) $(klib-real-objs) |
302 | endif # klib-target |
303 | |
304 | ifdef kprogs |
305 | # Compile klibc-programs for the target |
306 | # =========================================================================== |
307 | |
308 | __build : $(kprog-dirs) $(static-y) $(shared-y) |
309 | |
310 | # Descend if needed |
311 | $(sort $(addsuffix /lib.a,$(kprog-dirs))): $(kprog-dirs) ; |
312 | |
313 | # Define dependencies for link of progs |
314 | # For the simple program: |
315 | # file.o => file |
316 | # A program with multiple objects |
317 | # filea.o, fileb.o => file |
318 | # A program with .o files in another dir |
319 | # dir/lib.a filea.o => file |
320 | |
321 | stripobj = $(subst $(obj)/,,$@) |
322 | addliba = $(addprefix $(obj)/, $(patsubst %/, %/lib.a, $(1))) |
323 | link-deps = $(if $($(stripobj)-y), $(call addliba, $($(stripobj)-y)), $@.o) \ |
324 | $(call objectify,$($(stripobj)-lib)) |
325 | |
326 | quiet_cmd_ld-static = KLIBCLD $@ |
327 | cmd_ld-static = $(KLIBCLD) $(KLIBCLDFLAGS) -o $@ \ |
328 | $(EXTRA_KLIBCLDFLAGS) \ |
329 | $(KLIBCCRT0) \ |
330 | --start-group \ |
331 | $(link-deps) \ |
332 | $(KLIBCLIBC) \ |
333 | $(KLIBCLIBGCC) \ |
334 | --end-group ; \ |
335 | cp -f $@ $@.g ; \ |
336 | $(KLIBCSTRIP) $(KLIBCSTRIPFLAGS) $@ |
337 | |
338 | |
339 | $(static-y): $(kprog-objs) $(lib-target) $(KLIBCCRT0) $(KLIBCLIBC) FORCE |
340 | $(call if_changed,ld-static) |
341 | |
342 | quiet_cmd_ld-shared = KLIBCLD $@ |
343 | cmd_ld-shared = $(KLIBCLD) $(KLIBCLDFLAGS) -o $@ \ |
344 | $(EXTRA_KLIBCLDFLAGS) \ |
345 | $(KLIBCEMAIN) $(KLIBCCRTSHARED) \ |
346 | --start-group \ |
347 | $(link-deps) \ |
348 | -R $(KLIBCLIBCSHARED) \ |
349 | $(KLIBCLIBGCC) \ |
350 | --end-group ; \ |
351 | cp -f $@ $@.g ; \ |
352 | $(KLIBCSTRIP) $(KLIBCSTRIPFLAGS) $@ |
353 | |
354 | |
355 | $(shared-y): $(kprog-objs) $(lib-target) $(KLIBCCRTSHARED) \ |
356 | $(KLIBCLIBCSHARED) FORCE |
357 | $(call if_changed,ld-shared) |
358 | |
359 | # Do not try to build KLIBC libaries if we are building klibc |
360 | ifeq ($(klibc-build),) |
361 | $(KLIBCCRT0) $(KLIBCLIBC): ; |
362 | $(KLIBCCRTSHARED) $(KLIBCLIBCSHARED): ; |
363 | endif |
364 | |
365 | targets += $(kprog-real-objs) |
366 | endif |
367 | |
368 | # Compile programs on the host |
369 | # =========================================================================== |
370 | ifdef hostprogs-y |
371 | include $(srctree)/scripts/Makefile.host |
372 | endif |
373 | |
374 | # Descending |
375 | # --------------------------------------------------------------------------- |
376 | |
377 | .PHONY: $(subdir-y) $(kprog-dirs) $(klib-dirs) |
378 | $(sort $(subdir-y) $(kprog-dirs) $(klib-dirs)): $(lib-target) |
379 | $(Q)$(MAKE) $(klibc)=$@ |
380 | |
381 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
382 | # --------------------------------------------------------------------------- |
383 | |
384 | .PHONY: FORCE |
385 | |
386 | FORCE: |
387 | |
388 | # Linking |
389 | # Create a reloctable composite object file |
390 | # --------------------------------------------------------------------------- |
391 | quiet_cmd_klibcld = KLIBCLD $@ |
392 | cmd_klibcld = $(KLIBCLD) -r $(KLIBCLDFLAGS) \ |
393 | $(EXTRA_KLIBCLDFLAGS) $(KLIBCLDFLAGS_$(@F)) \ |
394 | $(filter-out FORCE,$^) -o $@ |
395 | |
396 | |
397 | # Link target to a new name |
398 | # --------------------------------------------------------------------------- |
399 | quiet_cmd_ln = LN $@ |
400 | cmd_ln = rm -f $@ && ln $< $@ |
401 | |
402 | # Strip target (remove all debugging info) |
403 | quiet_cmd_strip = STRIP $@ |
404 | cmd_strip = $(KLIBCSTRIP) $(KLIBCSTRIPFLAGS) $< -o $@ |
405 | |
406 | |
407 | # Read all saved command lines and dependencies for the $(targets) we |
408 | # may be building above, using $(if_changed{,_dep}). As an |
409 | # optimization, we don't need to read them if the target does not |
410 | # exist, we will rebuild anyway in that case. |
411 | targets := $(wildcard $(sort $(targets))) |
412 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
413 | |
414 | ifneq ($(cmd_files),) |
415 | include $(cmd_files) |
416 | endif |
417 | |
418 | # Shorthand for $(Q)$(MAKE) -f scripts/Kbuild.klibc obj |
419 | # Usage: |
420 | # $(Q)$(MAKE) $(klibc)=dir |
421 | klibc := -rR -f $(srctree)/scripts/Kbuild.klibc obj |