Annotation 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 ago) by niro
File size: 13901 byte(s)
Fri May 27 15:12:11 2011 UTC (13 years ago) by niro
File size: 13901 byte(s)
-updated to klibc-1.5.22 with mntproc definitions patch included
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 | niro | 1122 | -include $(objtree)/.config |
62 | niro | 532 | |
63 | # Generic Kbuild routines | ||
64 | include $(srctree)/scripts/Kbuild.include | ||
65 | |||
66 | # Defines used when compiling early userspace (klibc programs) | ||
67 | # --------------------------------------------------------------------------- | ||
68 | |||
69 | niro | 1122 | KLIBCREQFLAGS := $(call cc-option, -fno-stack-protector, ) \ |
70 | $(call cc-option, -fwrapv, ) | ||
71 | niro | 532 | KLIBCARCHREQFLAGS := |
72 | KLIBCOPTFLAGS := | ||
73 | KLIBCWARNFLAGS := -W -Wall -Wno-sign-compare -Wno-unused-parameter | ||
74 | KLIBCSHAREDFLAGS := | ||
75 | KLIBCBITSIZE := | ||
76 | KLIBCLDFLAGS := | ||
77 | KLIBCCFLAGS := | ||
78 | |||
79 | niro | 1122 | # Defaults for arch to override |
80 | KLIBCARCHINCFLAGS = -I$(KLIBCKERNELOBJ)/arch/$(KLIBCARCH)/include | ||
81 | |||
82 | niro | 532 | # Arch specific definitions for klibc |
83 | niro | 1122 | include $(srctree)/$(KLIBCSRC)/arch/$(KLIBCARCHDIR)/MCONFIG |
84 | niro | 532 | |
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 | niro | 1297 | |
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 | niro | 532 | KLIBCSTRIP := $(STRIP) |
103 | KLIBCNM := $(NM) | ||
104 | niro | 1297 | KLIBCOBJCOPY := $(OBJCOPY) |
105 | KLIBCOBJDUMP := $(OBJDUMP) | ||
106 | niro | 532 | |
107 | # klibc include paths | ||
108 | KLIBCCPPFLAGS := -nostdinc -iwithprefix include \ | ||
109 | -I$(KLIBCINC)/arch/$(KLIBCARCHDIR) \ | ||
110 | -I$(KLIBCINC)/bits$(KLIBCBITSIZE) \ | ||
111 | -I$(KLIBCOBJ)/../include \ | ||
112 | -I$(KLIBCINC) | ||
113 | # kernel include paths | ||
114 | niro | 1122 | 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 | niro | 532 | $(KLIBCARCHINCFLAGS) |
120 | |||
121 | # klibc definitions | ||
122 | KLIBCDEFS += -D__KLIBC__=$(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 | niro | 1122 | include $(srctree)/$(obj)/Kbuild |
156 | niro | 532 | |
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 | niro | 1297 | rm -f $@; $(call klibc-ar,cru,Dcr) $@ $(filter $(lib-y), $^),\ |
274 | rm -f $@; $(call klibc-ar,crs,Dcrs) $@) | ||
275 | niro | 532 | |
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 | niro | 1122 | klibc := -rR -f $(srctree)/scripts/Kbuild.klibc obj |