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Masahiro Yamada22433fc2014-02-04 17:24:27 +09001# ==========================================================================
2# Building
3# ==========================================================================
4
Masahiro Yamada6825a952014-02-04 17:24:28 +09005# Modified for U-Boot
Masahiro Yamada51148792014-07-30 14:08:17 +09006prefix := tpl
7src := $(patsubst $(prefix)/%,%,$(obj))
8ifeq ($(obj),$(src))
9prefix := spl
10src := $(patsubst $(prefix)/%,%,$(obj))
11ifeq ($(obj),$(src))
12prefix := .
13endif
Masahiro Yamada6825a952014-02-04 17:24:28 +090014endif
Masahiro Yamada22433fc2014-02-04 17:24:27 +090015
16PHONY := __build
17__build:
18
19# Init all relevant variables used in kbuild files so
20# 1) they have correct type
21# 2) they do not inherit any value from the environment
22obj-y :=
23obj-m :=
24lib-y :=
25lib-m :=
26always :=
27targets :=
28subdir-y :=
29subdir-m :=
30EXTRA_AFLAGS :=
31EXTRA_CFLAGS :=
32EXTRA_CPPFLAGS :=
33EXTRA_LDFLAGS :=
34asflags-y :=
35ccflags-y :=
36cppflags-y :=
37ldflags-y :=
38
39subdir-asflags-y :=
40subdir-ccflags-y :=
41
42# Read auto.conf if it exists, otherwise ignore
Masahiro Yamada51148792014-07-30 14:08:17 +090043# Modified for U-Boot
Masahiro Yamadae02ee252015-02-24 22:26:20 +090044-include include/config/auto.conf
Masahiro Yamada51148792014-07-30 14:08:17 +090045-include $(prefix)/include/autoconf.mk
Masahiro Yamadae02ee252015-02-24 22:26:20 +090046include scripts/Makefile.uncmd_spl
Masahiro Yamada01072b42014-02-04 17:24:32 +090047
Masahiro Yamada22433fc2014-02-04 17:24:27 +090048include scripts/Kbuild.include
49
50# For backward compatibility check that these variables do not change
51save-cflags := $(CFLAGS)
52
53# The filename Kbuild has precedence over Makefile
54kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
55kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
56include $(kbuild-file)
57
Masahiro Yamada026f9cf2014-03-05 16:59:40 +090058# Added for U-Boot
59asflags-y += $(PLATFORM_CPPFLAGS)
60ccflags-y += $(PLATFORM_CPPFLAGS)
61cppflags-y += $(PLATFORM_CPPFLAGS)
62
Masahiro Yamada22433fc2014-02-04 17:24:27 +090063# If the save-* variables changed error out
64ifeq ($(KBUILD_NOPEDANTIC),)
65 ifneq ("$(save-cflags)","$(CFLAGS)")
66 $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
67 endif
68endif
69
Masahiro Yamada22433fc2014-02-04 17:24:27 +090070include scripts/Makefile.lib
71
72ifdef host-progs
73ifneq ($(hostprogs-y),$(host-progs))
74$(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!)
75hostprogs-y += $(host-progs)
76endif
77endif
78
79# Do not include host rules unless needed
80ifneq ($(hostprogs-y)$(hostprogs-m),)
81include scripts/Makefile.host
82endif
83
Masahiro Yamada6825a952014-02-04 17:24:28 +090084# Uncommented for U-Boot
85# We need to create output dicrectory for SPL and TPL even for in-tree build
86#ifneq ($(KBUILD_SRC),)
Masahiro Yamada22433fc2014-02-04 17:24:27 +090087# Create output directory if not already present
88_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
89
90# Create directories for object files if directory does not exist
91# Needed when obj-y := dir/file.o syntax is used
92_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d)))
Masahiro Yamada6825a952014-02-04 17:24:28 +090093#endif
Masahiro Yamada22433fc2014-02-04 17:24:27 +090094
95ifndef obj
96$(warning kbuild: Makefile.build is included improperly)
97endif
98
99# ===========================================================================
100
Masahiro Yamada176d0982014-10-30 11:06:13 +0900101ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900102lib-target := $(obj)/lib.a
103endif
104
Masahiro Yamada176d0982014-10-30 11:06:13 +0900105ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900106builtin-target := $(obj)/built-in.o
107endif
108
109modorder-target := $(obj)/modules.order
110
111# We keep a list of all modules in $(MODVERDIR)
112
113__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
114 $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
115 $(subdir-ym) $(always)
116 @:
117
118# Linus' kernel sanity checking tool
119ifneq ($(KBUILD_CHECKSRC),0)
120 ifeq ($(KBUILD_CHECKSRC),2)
121 quiet_cmd_force_checksrc = CHECK $<
122 cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
123 else
124 quiet_cmd_checksrc = CHECK $<
125 cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
126 endif
127endif
128
129# Do section mismatch analysis for each module/built-in.o
130ifdef CONFIG_DEBUG_SECTION_MISMATCH
131 cmd_secanalysis = ; scripts/mod/modpost $@
132endif
133
134# Compile C sources (.c)
135# ---------------------------------------------------------------------------
136
137# Default is built-in, unless we know otherwise
138modkern_cflags = \
139 $(if $(part-of-module), \
140 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
141 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
142quiet_modtag := $(empty) $(empty)
143
144$(real-objs-m) : part-of-module := y
145$(real-objs-m:.o=.i) : part-of-module := y
146$(real-objs-m:.o=.s) : part-of-module := y
147$(real-objs-m:.o=.lst): part-of-module := y
148
149$(real-objs-m) : quiet_modtag := [M]
150$(real-objs-m:.o=.i) : quiet_modtag := [M]
151$(real-objs-m:.o=.s) : quiet_modtag := [M]
152$(real-objs-m:.o=.lst): quiet_modtag := [M]
153
154$(obj-m) : quiet_modtag := [M]
155
156# Default for not multi-part modules
157modname = $(basetarget)
158
159$(multi-objs-m) : modname = $(modname-multi)
160$(multi-objs-m:.o=.i) : modname = $(modname-multi)
161$(multi-objs-m:.o=.s) : modname = $(modname-multi)
162$(multi-objs-m:.o=.lst) : modname = $(modname-multi)
163$(multi-objs-y) : modname = $(modname-multi)
164$(multi-objs-y:.o=.i) : modname = $(modname-multi)
165$(multi-objs-y:.o=.s) : modname = $(modname-multi)
166$(multi-objs-y:.o=.lst) : modname = $(modname-multi)
167
168quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
Masahiro Yamada598e2d32014-04-15 13:29:00 +0900169cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900170
171$(obj)/%.s: $(src)/%.c FORCE
172 $(call if_changed_dep,cc_s_c)
173
174quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
175cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $<
176
177$(obj)/%.i: $(src)/%.c FORCE
178 $(call if_changed_dep,cc_i_c)
179
180cmd_gensymtypes = \
181 $(CPP) -D__GENKSYMS__ $(c_flags) $< | \
182 $(GENKSYMS) $(if $(1), -T $(2)) \
183 $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \
184 $(if $(KBUILD_PRESERVE),-p) \
185 -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
186
187quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
188cmd_cc_symtypes_c = \
189 set -e; \
190 $(call cmd_gensymtypes,true,$@) >/dev/null; \
191 test -s $@ || rm -f $@
192
193$(obj)/%.symtypes : $(src)/%.c FORCE
194 $(call cmd,cc_symtypes_c)
195
196# C (.c) files
197# The C file is compiled and updated dependency information is generated.
198# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
199
200quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
201
202ifndef CONFIG_MODVERSIONS
203cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
204
205else
206# When module versioning is enabled the following steps are executed:
207# o compile a .tmp_<file>.o from <file>.c
208# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
209# not export symbols, we just rename .tmp_<file>.o to <file>.o and
210# are done.
211# o otherwise, we calculate symbol versions using the good old
212# genksyms on the preprocessed source and postprocess them in a way
213# that they are usable as a linker script
214# o generate <file>.o from .tmp_<file>.o using the linker to
215# replace the unresolved symbols __crc_exported_symbol with
216# the actual value of the checksum generated by genksyms
217
218cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
219cmd_modversions = \
220 if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
221 $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
222 > $(@D)/.tmp_$(@F:.o=.ver); \
223 \
224 $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
225 -T $(@D)/.tmp_$(@F:.o=.ver); \
226 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
227 else \
228 mv -f $(@D)/.tmp_$(@F) $@; \
229 fi;
230endif
231
232ifdef CONFIG_FTRACE_MCOUNT_RECORD
233ifdef BUILD_C_RECORDMCOUNT
234ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
235 RECORDMCOUNT_FLAGS = -w
236endif
237# Due to recursion, we must skip empty.o.
238# The empty.o file is created in the make process in order to determine
239# the target endianness and word size. It is made before all other C
240# files, including recordmcount.
241sub_cmd_record_mcount = \
242 if [ $(@) != "scripts/mod/empty.o" ]; then \
243 $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \
244 fi;
245recordmcount_source := $(srctree)/scripts/recordmcount.c \
246 $(srctree)/scripts/recordmcount.h
247else
248sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
249 "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
250 "$(if $(CONFIG_64BIT),64,32)" \
251 "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \
252 "$(LD)" "$(NM)" "$(RM)" "$(MV)" \
253 "$(if $(part-of-module),1,0)" "$(@)";
254recordmcount_source := $(srctree)/scripts/recordmcount.pl
255endif
256cmd_record_mcount = \
257 if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then \
258 $(sub_cmd_record_mcount) \
259 fi;
260endif
261
262define rule_cc_o_c
263 $(call echo-cmd,checksrc) $(cmd_checksrc) \
264 $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \
265 $(cmd_modversions) \
266 $(call echo-cmd,record_mcount) \
267 $(cmd_record_mcount) \
268 scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \
269 $(dot-target).tmp; \
270 rm -f $(depfile); \
271 mv -f $(dot-target).tmp $(dot-target).cmd
272endef
273
274# Built-in and composite module parts
275$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
276 $(call cmd,force_checksrc)
277 $(call if_changed_rule,cc_o_c)
278
279# Single-part modules are special since we need to mark them in $(MODVERDIR)
280
281$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
282 $(call cmd,force_checksrc)
283 $(call if_changed_rule,cc_o_c)
284 @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
285
286quiet_cmd_cc_lst_c = MKLST $@
287 cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
288 $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
289 System.map $(OBJDUMP) > $@
290
291$(obj)/%.lst: $(src)/%.c FORCE
292 $(call if_changed_dep,cc_lst_c)
293
294# Compile assembler sources (.S)
295# ---------------------------------------------------------------------------
296
297modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
298
299$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
300$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
301
302quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
Masahiro Yamada45f0ad92014-06-16 18:56:38 +0900303cmd_as_s_S = $(CPP) $(a_flags) -o $@ $<
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900304
305$(obj)/%.s: $(src)/%.S FORCE
306 $(call if_changed_dep,as_s_S)
307
308quiet_cmd_as_o_S = AS $(quiet_modtag) $@
309cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
310
311$(obj)/%.o: $(src)/%.S FORCE
312 $(call if_changed_dep,as_o_S)
313
314targets += $(real-objs-y) $(real-objs-m) $(lib-y)
315targets += $(extra-y) $(MAKECMDGOALS) $(always)
316
317# Linker scripts preprocessor (.lds.S -> .lds)
318# ---------------------------------------------------------------------------
319quiet_cmd_cpp_lds_S = LDS $@
320 cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
321 -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
322
323$(obj)/%.lds: $(src)/%.lds.S FORCE
324 $(call if_changed_dep,cpp_lds_S)
325
326# ASN.1 grammar
327# ---------------------------------------------------------------------------
328quiet_cmd_asn1_compiler = ASN.1 $@
329 cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
330 $(subst .h,.c,$@) $(subst .c,.h,$@)
331
332.PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h
333
334$(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
335 $(call cmd,asn1_compiler)
336
337# Build the compiled-in targets
338# ---------------------------------------------------------------------------
339
340# To build objects in subdirs, we need to descend into the directories
341$(sort $(subdir-obj-y)): $(subdir-ym) ;
342
343#
344# Rule to compile a set of .o files into one .o file
345#
346ifdef builtin-target
347quiet_cmd_link_o_target = LD $@
348# If the list of objects to link is empty, just create an empty built-in.o
349cmd_link_o_target = $(if $(strip $(obj-y)),\
350 $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \
351 $(cmd_secanalysis),\
352 rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@)
353
354$(builtin-target): $(obj-y) FORCE
355 $(call if_changed,link_o_target)
356
357targets += $(builtin-target)
358endif # builtin-target
359
360#
361# Rule to create modules.order file
362#
363# Create commands to either record .ko file or cat modules.order from
364# a subdirectory
365modorder-cmds = \
366 $(foreach m, $(modorder), \
367 $(if $(filter %/modules.order, $m), \
368 cat $m;, echo kernel/$m;))
369
370$(modorder-target): $(subdir-ym) FORCE
371 $(Q)(cat /dev/null; $(modorder-cmds)) > $@
372
373#
374# Rule to compile a set of .o files into one .a file
375#
376ifdef lib-target
377quiet_cmd_link_l_target = AR $@
378cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y)
379
380$(lib-target): $(lib-y) FORCE
381 $(call if_changed,link_l_target)
382
383targets += $(lib-target)
384endif
385
386#
387# Rule to link composite objects
388#
389# Composite objects are specified in kbuild makefile as follows:
390# <composite-object>-objs := <list of .o files>
391# or
392# <composite-object>-y := <list of .o files>
393link_multi_deps = \
394$(filter $(addprefix $(obj)/, \
395$($(subst $(obj)/,,$(@:.o=-objs))) \
396$($(subst $(obj)/,,$(@:.o=-y)))), $^)
Masahiro Yamada45f0ad92014-06-16 18:56:38 +0900397
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900398quiet_cmd_link_multi-y = LD $@
399cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
400
401quiet_cmd_link_multi-m = LD [M] $@
402cmd_link_multi-m = $(cmd_link_multi-y)
403
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900404$(multi-used-y): FORCE
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900405 $(call if_changed,link_multi-y)
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900406$(call multi_depend, $(multi-used-y), .o, -objs -y)
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900407
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900408$(multi-used-m): FORCE
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900409 $(call if_changed,link_multi-m)
410 @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900411$(call multi_depend, $(multi-used-m), .o, -objs -y)
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900412
413targets += $(multi-used-y) $(multi-used-m)
414
415
416# Descending
417# ---------------------------------------------------------------------------
418
419PHONY += $(subdir-ym)
420$(subdir-ym):
421 $(Q)$(MAKE) $(build)=$@
422
423# Add FORCE to the prequisites of a target to force it to be always rebuilt.
424# ---------------------------------------------------------------------------
425
426PHONY += FORCE
427
428FORCE:
429
430# Read all saved command lines and dependencies for the $(targets) we
431# may be building above, using $(if_changed{,_dep}). As an
432# optimization, we don't need to read them if the target does not
433# exist, we will rebuild anyway in that case.
434
435targets := $(wildcard $(sort $(targets)))
436cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
437
438ifneq ($(cmd_files),)
439 include $(cmd_files)
440endif
441
442# Declare the contents of the .PHONY variable as phony. We keep that
443# information in a variable se we can use it in if_changed and friends.
444
445.PHONY: $(PHONY)