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Tom Rini83d290c2018-05-06 17:58:06 -04001# SPDX-License-Identifier: GPL-2.0
Masahiro Yamada22433fc2014-02-04 17:24:27 +09002# ==========================================================================
3# Building
4# ==========================================================================
5
Masahiro Yamada6825a952014-02-04 17:24:28 +09006# Modified for U-Boot
Masahiro Yamada51148792014-07-30 14:08:17 +09007prefix := tpl
8src := $(patsubst $(prefix)/%,%,$(obj))
9ifeq ($(obj),$(src))
10prefix := spl
11src := $(patsubst $(prefix)/%,%,$(obj))
12ifeq ($(obj),$(src))
13prefix := .
14endif
Masahiro Yamada6825a952014-02-04 17:24:28 +090015endif
Masahiro Yamada22433fc2014-02-04 17:24:27 +090016
17PHONY := __build
18__build:
19
20# Init all relevant variables used in kbuild files so
21# 1) they have correct type
22# 2) they do not inherit any value from the environment
23obj-y :=
24obj-m :=
25lib-y :=
26lib-m :=
27always :=
28targets :=
29subdir-y :=
30subdir-m :=
31EXTRA_AFLAGS :=
32EXTRA_CFLAGS :=
33EXTRA_CPPFLAGS :=
34EXTRA_LDFLAGS :=
35asflags-y :=
36ccflags-y :=
37cppflags-y :=
38ldflags-y :=
39
40subdir-asflags-y :=
41subdir-ccflags-y :=
42
43# Read auto.conf if it exists, otherwise ignore
Masahiro Yamada51148792014-07-30 14:08:17 +090044# Modified for U-Boot
Masahiro Yamadae02ee252015-02-24 22:26:20 +090045-include include/config/auto.conf
Masahiro Yamada51148792014-07-30 14:08:17 +090046-include $(prefix)/include/autoconf.mk
Masahiro Yamadae02ee252015-02-24 22:26:20 +090047include scripts/Makefile.uncmd_spl
Masahiro Yamada01072b42014-02-04 17:24:32 +090048
Masahiro Yamada22433fc2014-02-04 17:24:27 +090049include scripts/Kbuild.include
50
51# For backward compatibility check that these variables do not change
52save-cflags := $(CFLAGS)
53
54# The filename Kbuild has precedence over Makefile
55kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
56kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
57include $(kbuild-file)
58
Masahiro Yamada026f9cf2014-03-05 16:59:40 +090059# Added for U-Boot
60asflags-y += $(PLATFORM_CPPFLAGS)
61ccflags-y += $(PLATFORM_CPPFLAGS)
62cppflags-y += $(PLATFORM_CPPFLAGS)
63
Masahiro Yamada22433fc2014-02-04 17:24:27 +090064# If the save-* variables changed error out
65ifeq ($(KBUILD_NOPEDANTIC),)
66 ifneq ("$(save-cflags)","$(CFLAGS)")
67 $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
68 endif
69endif
70
Masahiro Yamada22433fc2014-02-04 17:24:27 +090071include scripts/Makefile.lib
72
73ifdef host-progs
74ifneq ($(hostprogs-y),$(host-progs))
75$(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!)
76hostprogs-y += $(host-progs)
77endif
78endif
79
80# Do not include host rules unless needed
81ifneq ($(hostprogs-y)$(hostprogs-m),)
82include scripts/Makefile.host
83endif
84
Masahiro Yamada6825a952014-02-04 17:24:28 +090085# Uncommented for U-Boot
86# We need to create output dicrectory for SPL and TPL even for in-tree build
87#ifneq ($(KBUILD_SRC),)
Masahiro Yamada22433fc2014-02-04 17:24:27 +090088# Create output directory if not already present
89_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
90
91# Create directories for object files if directory does not exist
92# Needed when obj-y := dir/file.o syntax is used
93_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d)))
Masahiro Yamada6825a952014-02-04 17:24:28 +090094#endif
Masahiro Yamada22433fc2014-02-04 17:24:27 +090095
96ifndef obj
97$(warning kbuild: Makefile.build is included improperly)
98endif
99
100# ===========================================================================
101
Masahiro Yamada176d0982014-10-30 11:06:13 +0900102ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900103lib-target := $(obj)/lib.a
104endif
105
Masahiro Yamada176d0982014-10-30 11:06:13 +0900106ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900107builtin-target := $(obj)/built-in.o
108endif
109
110modorder-target := $(obj)/modules.order
111
112# We keep a list of all modules in $(MODVERDIR)
113
114__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
115 $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
116 $(subdir-ym) $(always)
117 @:
118
119# Linus' kernel sanity checking tool
120ifneq ($(KBUILD_CHECKSRC),0)
121 ifeq ($(KBUILD_CHECKSRC),2)
122 quiet_cmd_force_checksrc = CHECK $<
123 cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
124 else
125 quiet_cmd_checksrc = CHECK $<
126 cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
127 endif
128endif
129
130# Do section mismatch analysis for each module/built-in.o
131ifdef CONFIG_DEBUG_SECTION_MISMATCH
132 cmd_secanalysis = ; scripts/mod/modpost $@
133endif
134
135# Compile C sources (.c)
136# ---------------------------------------------------------------------------
137
138# Default is built-in, unless we know otherwise
139modkern_cflags = \
140 $(if $(part-of-module), \
141 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
142 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
143quiet_modtag := $(empty) $(empty)
144
145$(real-objs-m) : part-of-module := y
146$(real-objs-m:.o=.i) : part-of-module := y
147$(real-objs-m:.o=.s) : part-of-module := y
148$(real-objs-m:.o=.lst): part-of-module := y
149
150$(real-objs-m) : quiet_modtag := [M]
151$(real-objs-m:.o=.i) : quiet_modtag := [M]
152$(real-objs-m:.o=.s) : quiet_modtag := [M]
153$(real-objs-m:.o=.lst): quiet_modtag := [M]
154
155$(obj-m) : quiet_modtag := [M]
156
157# Default for not multi-part modules
158modname = $(basetarget)
159
160$(multi-objs-m) : modname = $(modname-multi)
161$(multi-objs-m:.o=.i) : modname = $(modname-multi)
162$(multi-objs-m:.o=.s) : modname = $(modname-multi)
163$(multi-objs-m:.o=.lst) : modname = $(modname-multi)
164$(multi-objs-y) : modname = $(modname-multi)
165$(multi-objs-y:.o=.i) : modname = $(modname-multi)
166$(multi-objs-y:.o=.s) : modname = $(modname-multi)
167$(multi-objs-y:.o=.lst) : modname = $(modname-multi)
168
169quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
Masahiro Yamada598e2d32014-04-15 13:29:00 +0900170cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900171
172$(obj)/%.s: $(src)/%.c FORCE
173 $(call if_changed_dep,cc_s_c)
174
175quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
176cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $<
177
178$(obj)/%.i: $(src)/%.c FORCE
179 $(call if_changed_dep,cc_i_c)
180
181cmd_gensymtypes = \
182 $(CPP) -D__GENKSYMS__ $(c_flags) $< | \
183 $(GENKSYMS) $(if $(1), -T $(2)) \
184 $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \
185 $(if $(KBUILD_PRESERVE),-p) \
186 -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
187
188quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
189cmd_cc_symtypes_c = \
190 set -e; \
191 $(call cmd_gensymtypes,true,$@) >/dev/null; \
192 test -s $@ || rm -f $@
193
194$(obj)/%.symtypes : $(src)/%.c FORCE
195 $(call cmd,cc_symtypes_c)
196
197# C (.c) files
198# The C file is compiled and updated dependency information is generated.
199# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
200
201quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
202
203ifndef CONFIG_MODVERSIONS
204cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
205
206else
207# When module versioning is enabled the following steps are executed:
208# o compile a .tmp_<file>.o from <file>.c
209# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
210# not export symbols, we just rename .tmp_<file>.o to <file>.o and
211# are done.
212# o otherwise, we calculate symbol versions using the good old
213# genksyms on the preprocessed source and postprocess them in a way
214# that they are usable as a linker script
215# o generate <file>.o from .tmp_<file>.o using the linker to
216# replace the unresolved symbols __crc_exported_symbol with
217# the actual value of the checksum generated by genksyms
218
219cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
220cmd_modversions = \
221 if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
222 $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
223 > $(@D)/.tmp_$(@F:.o=.ver); \
224 \
225 $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
226 -T $(@D)/.tmp_$(@F:.o=.ver); \
227 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
228 else \
229 mv -f $(@D)/.tmp_$(@F) $@; \
230 fi;
231endif
232
233ifdef CONFIG_FTRACE_MCOUNT_RECORD
234ifdef BUILD_C_RECORDMCOUNT
235ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
236 RECORDMCOUNT_FLAGS = -w
237endif
238# Due to recursion, we must skip empty.o.
239# The empty.o file is created in the make process in order to determine
240# the target endianness and word size. It is made before all other C
241# files, including recordmcount.
242sub_cmd_record_mcount = \
243 if [ $(@) != "scripts/mod/empty.o" ]; then \
244 $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \
245 fi;
246recordmcount_source := $(srctree)/scripts/recordmcount.c \
247 $(srctree)/scripts/recordmcount.h
248else
249sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
250 "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
251 "$(if $(CONFIG_64BIT),64,32)" \
252 "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \
253 "$(LD)" "$(NM)" "$(RM)" "$(MV)" \
254 "$(if $(part-of-module),1,0)" "$(@)";
255recordmcount_source := $(srctree)/scripts/recordmcount.pl
256endif
Masahiro Yamada98bd0e02015-07-05 01:56:55 +0900257cmd_record_mcount = \
258 if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \
259 "$(CC_FLAGS_FTRACE)" ]; then \
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900260 $(sub_cmd_record_mcount) \
261 fi;
262endif
263
264define rule_cc_o_c
265 $(call echo-cmd,checksrc) $(cmd_checksrc) \
266 $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \
267 $(cmd_modversions) \
268 $(call echo-cmd,record_mcount) \
269 $(cmd_record_mcount) \
270 scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \
271 $(dot-target).tmp; \
272 rm -f $(depfile); \
273 mv -f $(dot-target).tmp $(dot-target).cmd
274endef
275
276# Built-in and composite module parts
277$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
278 $(call cmd,force_checksrc)
279 $(call if_changed_rule,cc_o_c)
280
281# Single-part modules are special since we need to mark them in $(MODVERDIR)
282
283$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
284 $(call cmd,force_checksrc)
285 $(call if_changed_rule,cc_o_c)
286 @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
287
288quiet_cmd_cc_lst_c = MKLST $@
289 cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
290 $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
291 System.map $(OBJDUMP) > $@
292
293$(obj)/%.lst: $(src)/%.c FORCE
294 $(call if_changed_dep,cc_lst_c)
295
296# Compile assembler sources (.S)
297# ---------------------------------------------------------------------------
298
299modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
300
301$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
302$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
303
304quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
Masahiro Yamada45f0ad92014-06-16 18:56:38 +0900305cmd_as_s_S = $(CPP) $(a_flags) -o $@ $<
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900306
307$(obj)/%.s: $(src)/%.S FORCE
308 $(call if_changed_dep,as_s_S)
309
310quiet_cmd_as_o_S = AS $(quiet_modtag) $@
311cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
312
313$(obj)/%.o: $(src)/%.S FORCE
314 $(call if_changed_dep,as_o_S)
315
316targets += $(real-objs-y) $(real-objs-m) $(lib-y)
317targets += $(extra-y) $(MAKECMDGOALS) $(always)
318
319# Linker scripts preprocessor (.lds.S -> .lds)
320# ---------------------------------------------------------------------------
321quiet_cmd_cpp_lds_S = LDS $@
322 cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
323 -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
324
325$(obj)/%.lds: $(src)/%.lds.S FORCE
326 $(call if_changed_dep,cpp_lds_S)
327
328# ASN.1 grammar
329# ---------------------------------------------------------------------------
330quiet_cmd_asn1_compiler = ASN.1 $@
331 cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
332 $(subst .h,.c,$@) $(subst .c,.h,$@)
333
334.PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h
335
336$(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
337 $(call cmd,asn1_compiler)
338
339# Build the compiled-in targets
340# ---------------------------------------------------------------------------
341
342# To build objects in subdirs, we need to descend into the directories
343$(sort $(subdir-obj-y)): $(subdir-ym) ;
344
345#
346# Rule to compile a set of .o files into one .o file
347#
348ifdef builtin-target
349quiet_cmd_link_o_target = LD $@
350# If the list of objects to link is empty, just create an empty built-in.o
351cmd_link_o_target = $(if $(strip $(obj-y)),\
352 $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \
353 $(cmd_secanalysis),\
354 rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@)
355
356$(builtin-target): $(obj-y) FORCE
357 $(call if_changed,link_o_target)
358
359targets += $(builtin-target)
360endif # builtin-target
361
362#
363# Rule to create modules.order file
364#
365# Create commands to either record .ko file or cat modules.order from
366# a subdirectory
367modorder-cmds = \
368 $(foreach m, $(modorder), \
369 $(if $(filter %/modules.order, $m), \
370 cat $m;, echo kernel/$m;))
371
372$(modorder-target): $(subdir-ym) FORCE
373 $(Q)(cat /dev/null; $(modorder-cmds)) > $@
374
375#
376# Rule to compile a set of .o files into one .a file
377#
378ifdef lib-target
379quiet_cmd_link_l_target = AR $@
380cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y)
381
382$(lib-target): $(lib-y) FORCE
383 $(call if_changed,link_l_target)
384
385targets += $(lib-target)
386endif
387
388#
389# Rule to link composite objects
390#
391# Composite objects are specified in kbuild makefile as follows:
392# <composite-object>-objs := <list of .o files>
393# or
394# <composite-object>-y := <list of .o files>
395link_multi_deps = \
396$(filter $(addprefix $(obj)/, \
397$($(subst $(obj)/,,$(@:.o=-objs))) \
398$($(subst $(obj)/,,$(@:.o=-y)))), $^)
Masahiro Yamada45f0ad92014-06-16 18:56:38 +0900399
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900400quiet_cmd_link_multi-y = LD $@
401cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
402
403quiet_cmd_link_multi-m = LD [M] $@
404cmd_link_multi-m = $(cmd_link_multi-y)
405
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900406$(multi-used-y): FORCE
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900407 $(call if_changed,link_multi-y)
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900408$(call multi_depend, $(multi-used-y), .o, -objs -y)
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900409
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900410$(multi-used-m): FORCE
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900411 $(call if_changed,link_multi-m)
412 @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900413$(call multi_depend, $(multi-used-m), .o, -objs -y)
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900414
415targets += $(multi-used-y) $(multi-used-m)
416
417
Eugeniu Roscae91610d2018-05-19 14:13:50 +0200418# Add intermediate targets:
419# When building objects with specific suffix patterns, add intermediate
420# targets that the final targets are derived from.
421intermediate_targets = $(foreach sfx, $(2), \
422 $(patsubst %$(strip $(1)),%$(sfx), \
423 $(filter %$(strip $(1)), $(targets))))
424# %.lex.o <- %.lex.c <- %.l
425# %.tab.o <- %.tab.[ch] <- %.y
426targets += $(call intermediate_targets, .lex.o, .lex.c) \
427 $(call intermediate_targets, .tab.o, .tab.c .tab.h)
428
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900429# Descending
430# ---------------------------------------------------------------------------
431
432PHONY += $(subdir-ym)
433$(subdir-ym):
434 $(Q)$(MAKE) $(build)=$@
435
436# Add FORCE to the prequisites of a target to force it to be always rebuilt.
437# ---------------------------------------------------------------------------
438
439PHONY += FORCE
440
441FORCE:
442
443# Read all saved command lines and dependencies for the $(targets) we
444# may be building above, using $(if_changed{,_dep}). As an
445# optimization, we don't need to read them if the target does not
446# exist, we will rebuild anyway in that case.
447
448targets := $(wildcard $(sort $(targets)))
449cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
450
451ifneq ($(cmd_files),)
452 include $(cmd_files)
453endif
454
455# Declare the contents of the .PHONY variable as phony. We keep that
456# information in a variable se we can use it in if_changed and friends.
457
458.PHONY: $(PHONY)