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Tom Rini10e47792018-05-06 17:58:06 -04001# SPDX-License-Identifier: GPL-2.0
Masahiro Yamada47b65f72014-02-04 17:24:27 +09002# ==========================================================================
3# Building
4# ==========================================================================
5
Masahiro Yamada0d68fb12014-02-04 17:24:28 +09006# Modified for U-Boot
Masahiro Yamada60bb7342014-07-30 14:08:17 +09007prefix := tpl
8src := $(patsubst $(prefix)/%,%,$(obj))
9ifeq ($(obj),$(src))
10prefix := spl
11src := $(patsubst $(prefix)/%,%,$(obj))
12ifeq ($(obj),$(src))
13prefix := .
14endif
Masahiro Yamada0d68fb12014-02-04 17:24:28 +090015endif
Masahiro Yamada47b65f72014-02-04 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 Yamada60bb7342014-07-30 14:08:17 +090044# Modified for U-Boot
Masahiro Yamada72fb32b2015-02-24 22:26:20 +090045-include include/config/auto.conf
Masahiro Yamada60bb7342014-07-30 14:08:17 +090046-include $(prefix)/include/autoconf.mk
Masahiro Yamada72fb32b2015-02-24 22:26:20 +090047include scripts/Makefile.uncmd_spl
Masahiro Yamada5ac303c2014-02-04 17:24:32 +090048
Masahiro Yamada47b65f72014-02-04 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 Yamada958fe8f2014-03-05 16:59:40 +090059# Added for U-Boot
60asflags-y += $(PLATFORM_CPPFLAGS)
61ccflags-y += $(PLATFORM_CPPFLAGS)
62cppflags-y += $(PLATFORM_CPPFLAGS)
63
Masahiro Yamada47b65f72014-02-04 17:24:27 +090064# If the save-* variables changed error out
65ifeq ($(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 Yamada47b65f72014-02-04 17:24:27 +090071include scripts/Makefile.lib
72
Masahiro Yamada47b65f72014-02-04 17:24:27 +090073# Do not include host rules unless needed
Tom Rini5d4ecf22020-03-27 11:46:27 -040074ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
Masahiro Yamada47b65f72014-02-04 17:24:27 +090075include scripts/Makefile.host
76endif
77
Masahiro Yamada47b65f72014-02-04 17:24:27 +090078ifndef obj
79$(warning kbuild: Makefile.build is included improperly)
80endif
81
82# ===========================================================================
83
Masahiro Yamadaede865b2014-10-30 11:06:13 +090084ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
Masahiro Yamada47b65f72014-02-04 17:24:27 +090085lib-target := $(obj)/lib.a
86endif
87
Masahiro Yamadaede865b2014-10-30 11:06:13 +090088ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
Masahiro Yamada47b65f72014-02-04 17:24:27 +090089builtin-target := $(obj)/built-in.o
90endif
91
92modorder-target := $(obj)/modules.order
93
94# We keep a list of all modules in $(MODVERDIR)
95
96__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
97 $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
98 $(subdir-ym) $(always)
99 @:
100
101# Linus' kernel sanity checking tool
102ifneq ($(KBUILD_CHECKSRC),0)
103 ifeq ($(KBUILD_CHECKSRC),2)
104 quiet_cmd_force_checksrc = CHECK $<
105 cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
106 else
107 quiet_cmd_checksrc = CHECK $<
108 cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
109 endif
110endif
111
112# Do section mismatch analysis for each module/built-in.o
113ifdef CONFIG_DEBUG_SECTION_MISMATCH
114 cmd_secanalysis = ; scripts/mod/modpost $@
115endif
116
117# Compile C sources (.c)
118# ---------------------------------------------------------------------------
119
120# Default is built-in, unless we know otherwise
121modkern_cflags = \
122 $(if $(part-of-module), \
123 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
124 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
125quiet_modtag := $(empty) $(empty)
126
127$(real-objs-m) : part-of-module := y
128$(real-objs-m:.o=.i) : part-of-module := y
129$(real-objs-m:.o=.s) : part-of-module := y
130$(real-objs-m:.o=.lst): part-of-module := y
131
132$(real-objs-m) : quiet_modtag := [M]
133$(real-objs-m:.o=.i) : quiet_modtag := [M]
134$(real-objs-m:.o=.s) : quiet_modtag := [M]
135$(real-objs-m:.o=.lst): quiet_modtag := [M]
136
137$(obj-m) : quiet_modtag := [M]
138
139# Default for not multi-part modules
140modname = $(basetarget)
141
142$(multi-objs-m) : modname = $(modname-multi)
143$(multi-objs-m:.o=.i) : modname = $(modname-multi)
144$(multi-objs-m:.o=.s) : modname = $(modname-multi)
145$(multi-objs-m:.o=.lst) : modname = $(modname-multi)
146$(multi-objs-y) : modname = $(modname-multi)
147$(multi-objs-y:.o=.i) : modname = $(modname-multi)
148$(multi-objs-y:.o=.s) : modname = $(modname-multi)
149$(multi-objs-y:.o=.lst) : modname = $(modname-multi)
150
151quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
Masahiro Yamada9cf2a452014-04-15 13:29:00 +0900152cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900153
154$(obj)/%.s: $(src)/%.c FORCE
155 $(call if_changed_dep,cc_s_c)
156
157quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
158cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $<
159
160$(obj)/%.i: $(src)/%.c FORCE
161 $(call if_changed_dep,cc_i_c)
162
163cmd_gensymtypes = \
164 $(CPP) -D__GENKSYMS__ $(c_flags) $< | \
165 $(GENKSYMS) $(if $(1), -T $(2)) \
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900166 $(if $(KBUILD_PRESERVE),-p) \
167 -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
168
169quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
170cmd_cc_symtypes_c = \
171 set -e; \
172 $(call cmd_gensymtypes,true,$@) >/dev/null; \
173 test -s $@ || rm -f $@
174
175$(obj)/%.symtypes : $(src)/%.c FORCE
176 $(call cmd,cc_symtypes_c)
177
178# C (.c) files
179# The C file is compiled and updated dependency information is generated.
180# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
181
182quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
183
184ifndef CONFIG_MODVERSIONS
185cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
186
187else
188# When module versioning is enabled the following steps are executed:
189# o compile a .tmp_<file>.o from <file>.c
190# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
191# not export symbols, we just rename .tmp_<file>.o to <file>.o and
192# are done.
193# o otherwise, we calculate symbol versions using the good old
194# genksyms on the preprocessed source and postprocess them in a way
195# that they are usable as a linker script
196# o generate <file>.o from .tmp_<file>.o using the linker to
197# replace the unresolved symbols __crc_exported_symbol with
198# the actual value of the checksum generated by genksyms
199
200cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
201cmd_modversions = \
202 if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
203 $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
204 > $(@D)/.tmp_$(@F:.o=.ver); \
205 \
Tom Rini5d4ecf22020-03-27 11:46:27 -0400206 $(LD) $(KBUILD_LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900207 -T $(@D)/.tmp_$(@F:.o=.ver); \
208 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
209 else \
210 mv -f $(@D)/.tmp_$(@F) $@; \
211 fi;
212endif
213
214ifdef CONFIG_FTRACE_MCOUNT_RECORD
Tom Rini40f11702020-03-11 18:11:17 -0400215# gcc 5 supports generating the mcount tables directly
216ifneq ($(call cc-option,-mrecord-mcount,y),y)
217KBUILD_CFLAGS += -mrecord-mcount
218else
219# else do it all manually
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900220ifdef BUILD_C_RECORDMCOUNT
221ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
222 RECORDMCOUNT_FLAGS = -w
223endif
224# Due to recursion, we must skip empty.o.
225# The empty.o file is created in the make process in order to determine
226# the target endianness and word size. It is made before all other C
227# files, including recordmcount.
228sub_cmd_record_mcount = \
229 if [ $(@) != "scripts/mod/empty.o" ]; then \
230 $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \
231 fi;
232recordmcount_source := $(srctree)/scripts/recordmcount.c \
233 $(srctree)/scripts/recordmcount.h
234else
235sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
236 "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
237 "$(if $(CONFIG_64BIT),64,32)" \
Tom Rini5d4ecf22020-03-27 11:46:27 -0400238 "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \
239 "$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900240 "$(if $(part-of-module),1,0)" "$(@)";
241recordmcount_source := $(srctree)/scripts/recordmcount.pl
242endif
Masahiro Yamada56fc3ba2015-07-05 01:56:55 +0900243cmd_record_mcount = \
244 if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \
245 "$(CC_FLAGS_FTRACE)" ]; then \
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900246 $(sub_cmd_record_mcount) \
247 fi;
Tom Rini40f11702020-03-11 18:11:17 -0400248endif # -record-mcount
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900249endif
250
251define rule_cc_o_c
252 $(call echo-cmd,checksrc) $(cmd_checksrc) \
253 $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \
254 $(cmd_modversions) \
255 $(call echo-cmd,record_mcount) \
256 $(cmd_record_mcount) \
257 scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \
258 $(dot-target).tmp; \
259 rm -f $(depfile); \
260 mv -f $(dot-target).tmp $(dot-target).cmd
261endef
262
263# Built-in and composite module parts
264$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
265 $(call cmd,force_checksrc)
266 $(call if_changed_rule,cc_o_c)
267
268# Single-part modules are special since we need to mark them in $(MODVERDIR)
269
270$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
271 $(call cmd,force_checksrc)
272 $(call if_changed_rule,cc_o_c)
273 @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
274
275quiet_cmd_cc_lst_c = MKLST $@
276 cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
277 $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
278 System.map $(OBJDUMP) > $@
279
280$(obj)/%.lst: $(src)/%.c FORCE
281 $(call if_changed_dep,cc_lst_c)
282
283# Compile assembler sources (.S)
284# ---------------------------------------------------------------------------
285
286modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
287
288$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
289$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
290
291quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
Masahiro Yamada33eb5e72014-06-16 18:56:38 +0900292cmd_as_s_S = $(CPP) $(a_flags) -o $@ $<
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900293
294$(obj)/%.s: $(src)/%.S FORCE
295 $(call if_changed_dep,as_s_S)
296
297quiet_cmd_as_o_S = AS $(quiet_modtag) $@
298cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
299
300$(obj)/%.o: $(src)/%.S FORCE
301 $(call if_changed_dep,as_o_S)
302
303targets += $(real-objs-y) $(real-objs-m) $(lib-y)
304targets += $(extra-y) $(MAKECMDGOALS) $(always)
305
306# Linker scripts preprocessor (.lds.S -> .lds)
307# ---------------------------------------------------------------------------
308quiet_cmd_cpp_lds_S = LDS $@
309 cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
310 -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
311
312$(obj)/%.lds: $(src)/%.lds.S FORCE
313 $(call if_changed_dep,cpp_lds_S)
314
315# ASN.1 grammar
316# ---------------------------------------------------------------------------
317quiet_cmd_asn1_compiler = ASN.1 $@
AKASHI Takahirof7025262019-11-13 09:44:53 +0900318 cmd_asn1_compiler = $(objtree)/tools/asn1_compiler $< \
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900319 $(subst .h,.c,$@) $(subst .c,.h,$@)
320
AKASHI Takahirof7025262019-11-13 09:44:53 +0900321$(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/tools/asn1_compiler
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900322 $(call cmd,asn1_compiler)
323
324# Build the compiled-in targets
325# ---------------------------------------------------------------------------
326
327# To build objects in subdirs, we need to descend into the directories
328$(sort $(subdir-obj-y)): $(subdir-ym) ;
329
330#
331# Rule to compile a set of .o files into one .o file
332#
333ifdef builtin-target
Marek Behúnf8726852021-05-20 13:24:02 +0200334quiet_cmd_link_o_target = AR $@
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900335# If the list of objects to link is empty, just create an empty built-in.o
336cmd_link_o_target = $(if $(strip $(obj-y)),\
Marek Behúnf8726852021-05-20 13:24:02 +0200337 rm -f $@; $(AR) cDPrsT $@ $(filter $(obj-y), $^), \
338 rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@)
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900339
340$(builtin-target): $(obj-y) FORCE
341 $(call if_changed,link_o_target)
342
343targets += $(builtin-target)
344endif # builtin-target
345
346#
347# Rule to create modules.order file
348#
349# Create commands to either record .ko file or cat modules.order from
350# a subdirectory
351modorder-cmds = \
352 $(foreach m, $(modorder), \
353 $(if $(filter %/modules.order, $m), \
354 cat $m;, echo kernel/$m;))
355
356$(modorder-target): $(subdir-ym) FORCE
357 $(Q)(cat /dev/null; $(modorder-cmds)) > $@
358
359#
360# Rule to compile a set of .o files into one .a file
361#
362ifdef lib-target
363quiet_cmd_link_l_target = AR $@
Marek Behúnf8726852021-05-20 13:24:02 +0200364cmd_link_l_target = rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@ $(lib-y)
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900365
366$(lib-target): $(lib-y) FORCE
367 $(call if_changed,link_l_target)
368
369targets += $(lib-target)
370endif
371
372#
373# Rule to link composite objects
374#
375# Composite objects are specified in kbuild makefile as follows:
376# <composite-object>-objs := <list of .o files>
377# or
378# <composite-object>-y := <list of .o files>
379link_multi_deps = \
380$(filter $(addprefix $(obj)/, \
381$($(subst $(obj)/,,$(@:.o=-objs))) \
382$($(subst $(obj)/,,$(@:.o=-y)))), $^)
Masahiro Yamada33eb5e72014-06-16 18:56:38 +0900383
Marek Behúnf8726852021-05-20 13:24:02 +0200384
385quiet_cmd_link_multi-y = AR $@
386cmd_link_multi-y = rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@ $(link_multi_deps)
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900387
Marek Behúnf8726852021-05-20 13:24:02 +0200388quiet_cmd_link_multi-m = AR [M] $@
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900389cmd_link_multi-m = $(cmd_link_multi-y)
390
Masahiro Yamada8c4532f2014-10-30 11:06:10 +0900391$(multi-used-y): FORCE
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900392 $(call if_changed,link_multi-y)
Masahiro Yamada8c4532f2014-10-30 11:06:10 +0900393$(call multi_depend, $(multi-used-y), .o, -objs -y)
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900394
Masahiro Yamada8c4532f2014-10-30 11:06:10 +0900395$(multi-used-m): FORCE
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900396 $(call if_changed,link_multi-m)
397 @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
Masahiro Yamada8c4532f2014-10-30 11:06:10 +0900398$(call multi_depend, $(multi-used-m), .o, -objs -y)
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900399
400targets += $(multi-used-y) $(multi-used-m)
401
402
Eugeniu Roscad57dd942018-05-19 14:13:50 +0200403# Add intermediate targets:
404# When building objects with specific suffix patterns, add intermediate
405# targets that the final targets are derived from.
406intermediate_targets = $(foreach sfx, $(2), \
407 $(patsubst %$(strip $(1)),%$(sfx), \
408 $(filter %$(strip $(1)), $(targets))))
409# %.lex.o <- %.lex.c <- %.l
410# %.tab.o <- %.tab.[ch] <- %.y
AKASHI Takahiro5ace6ff2019-11-13 09:45:01 +0900411targets += $(call intermediate_targets, .lex.o, .lex.c) \
Eugeniu Roscad57dd942018-05-19 14:13:50 +0200412 $(call intermediate_targets, .tab.o, .tab.c .tab.h)
413
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900414# Descending
415# ---------------------------------------------------------------------------
416
417PHONY += $(subdir-ym)
418$(subdir-ym):
419 $(Q)$(MAKE) $(build)=$@
420
421# Add FORCE to the prequisites of a target to force it to be always rebuilt.
422# ---------------------------------------------------------------------------
423
424PHONY += FORCE
425
426FORCE:
427
428# Read all saved command lines and dependencies for the $(targets) we
429# may be building above, using $(if_changed{,_dep}). As an
430# optimization, we don't need to read them if the target does not
431# exist, we will rebuild anyway in that case.
432
Masahiro Yamada77ddac82020-04-17 16:21:36 +0900433cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900434
435ifneq ($(cmd_files),)
436 include $(cmd_files)
437endif
438
Masahiro Yamada77ddac82020-04-17 16:21:36 +0900439# Create directories for object files if they do not exist
440obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
441$(shell mkdir -p $(obj-dirs))
442
Masahiro Yamada47b65f72014-02-04 17:24:27 +0900443.PHONY: $(PHONY)