1# SPDX-License-Identifier: GPL-2.0
2# ==========================================================================
3# Building
4# ==========================================================================
5
6# Modified for U-Boot
7prefix := vpl
8src := $(patsubst $(prefix)/%,%,$(obj))
9ifeq ($(obj),$(src))
10prefix := tpl
11src := $(patsubst $(prefix)/%,%,$(obj))
12ifeq ($(obj),$(src))
13prefix := spl
14src := $(patsubst $(prefix)/%,%,$(obj))
15ifeq ($(obj),$(src))
16prefix := .
17endif
18endif
19endif
20
21PHONY := __build
22__build:
23
24# Init all relevant variables used in kbuild files so
25# 1) they have correct type
26# 2) they do not inherit any value from the environment
27obj-y :=
28obj-m :=
29lib-y :=
30lib-m :=
31always :=
32targets :=
33subdir-y :=
34subdir-m :=
35EXTRA_AFLAGS   :=
36EXTRA_CFLAGS   :=
37EXTRA_CPPFLAGS :=
38EXTRA_LDFLAGS  :=
39asflags-y  :=
40ccflags-y  :=
41cppflags-y :=
42ldflags-y  :=
43
44subdir-asflags-y :=
45subdir-ccflags-y :=
46
47# Read auto.conf if it exists, otherwise ignore
48# Modified for U-Boot
49-include include/config/auto.conf
50-include $(prefix)/include/autoconf.mk
51
52include scripts/Kbuild.include
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
59# Added for U-Boot
60asflags-y  += $(PLATFORM_CPPFLAGS)
61ccflags-y  += $(PLATFORM_CPPFLAGS)
62cppflags-y += $(PLATFORM_CPPFLAGS)
63
64include scripts/Makefile.lib
65
66# Do not include host rules unless needed
67ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
68include scripts/Makefile.host
69endif
70
71ifndef obj
72$(warning kbuild: Makefile.build is included improperly)
73endif
74
75# ===========================================================================
76
77ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
78lib-target := $(obj)/lib.a
79endif
80
81ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
82builtin-target := $(obj)/built-in.o
83endif
84
85modorder-target := $(obj)/modules.order
86
87# We keep a list of all modules in $(MODVERDIR)
88
89__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
90	 $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
91	 $(subdir-ym) $(always)
92	@:
93
94# Linus' kernel sanity checking tool
95ifeq ($(KBUILD_CHECKSRC),1)
96  quiet_cmd_checksrc       = CHECK   $<
97        cmd_checksrc       = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
98else ifeq ($(KBUILD_CHECKSRC),2)
99  quiet_cmd_force_checksrc = CHECK   $<
100        cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
101endif
102
103# Do section mismatch analysis for each module/built-in.o
104ifdef CONFIG_DEBUG_SECTION_MISMATCH
105  cmd_secanalysis = ; scripts/mod/modpost $@
106endif
107
108# Compile C sources (.c)
109# ---------------------------------------------------------------------------
110
111# Default is built-in, unless we know otherwise
112modkern_cflags =                                          \
113	$(if $(part-of-module),                           \
114		$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
115		$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
116quiet_modtag := $(empty)   $(empty)
117
118$(real-objs-m)        : part-of-module := y
119$(real-objs-m:.o=.i)  : part-of-module := y
120$(real-objs-m:.o=.s)  : part-of-module := y
121$(real-objs-m:.o=.lst): part-of-module := y
122
123$(real-objs-m)        : quiet_modtag := [M]
124$(real-objs-m:.o=.i)  : quiet_modtag := [M]
125$(real-objs-m:.o=.s)  : quiet_modtag := [M]
126$(real-objs-m:.o=.lst): quiet_modtag := [M]
127
128$(obj-m)              : quiet_modtag := [M]
129
130# Default for not multi-part modules
131modname = $(basetarget)
132
133$(multi-objs-m)         : modname = $(modname-multi)
134$(multi-objs-m:.o=.i)   : modname = $(modname-multi)
135$(multi-objs-m:.o=.s)   : modname = $(modname-multi)
136$(multi-objs-m:.o=.lst) : modname = $(modname-multi)
137$(multi-objs-y)         : modname = $(modname-multi)
138$(multi-objs-y:.o=.i)   : modname = $(modname-multi)
139$(multi-objs-y:.o=.s)   : modname = $(modname-multi)
140$(multi-objs-y:.o=.lst) : modname = $(modname-multi)
141
142quiet_cmd_cc_s_c = CC $(quiet_modtag)  $@
143cmd_cc_s_c       = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
144
145$(obj)/%.s: $(src)/%.c FORCE
146	$(call if_changed_dep,cc_s_c)
147
148quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
149cmd_cc_i_c       = $(CPP) $(c_flags)   -o $@ $<
150
151$(obj)/%.i: $(src)/%.c FORCE
152	$(call if_changed_dep,cc_i_c)
153
154cmd_gensymtypes =                                                           \
155    $(CPP) -D__GENKSYMS__ $(c_flags) $< |                                   \
156    $(GENKSYMS) $(if $(1), -T $(2))                                         \
157     $(if $(KBUILD_PRESERVE),-p)                                            \
158     -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
159
160quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
161cmd_cc_symtypes_c =                                                         \
162    set -e;                                                                 \
163    $(call cmd_gensymtypes,true,$@) >/dev/null;                             \
164    test -s $@ || rm -f $@
165
166$(obj)/%.symtypes : $(src)/%.c FORCE
167	$(call cmd,cc_symtypes_c)
168
169# C (.c) files
170# The C file is compiled and updated dependency information is generated.
171# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
172
173quiet_cmd_cc_o_c = CC $(quiet_modtag)  $@
174
175ifndef CONFIG_MODVERSIONS
176cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
177
178else
179# When module versioning is enabled the following steps are executed:
180# o compile a .tmp_<file>.o from <file>.c
181# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
182#   not export symbols, we just rename .tmp_<file>.o to <file>.o and
183#   are done.
184# o otherwise, we calculate symbol versions using the good old
185#   genksyms on the preprocessed source and postprocess them in a way
186#   that they are usable as a linker script
187# o generate <file>.o from .tmp_<file>.o using the linker to
188#   replace the unresolved symbols __crc_exported_symbol with
189#   the actual value of the checksum generated by genksyms
190
191cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
192cmd_modversions =								\
193	if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then		\
194		$(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes))	\
195		    > $(@D)/.tmp_$(@F:.o=.ver);					\
196										\
197		$(LD) $(KBUILD_LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) 		\
198			-T $(@D)/.tmp_$(@F:.o=.ver);				\
199		rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver);		\
200	else									\
201		mv -f $(@D)/.tmp_$(@F) $@;					\
202	fi;
203endif
204
205ifdef CONFIG_FTRACE_MCOUNT_RECORD
206# gcc 5 supports generating the mcount tables directly
207ifneq ($(call cc-option,-mrecord-mcount,y),y)
208KBUILD_CFLAGS += -mrecord-mcount
209else
210# else do it all manually
211ifdef BUILD_C_RECORDMCOUNT
212ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
213  RECORDMCOUNT_FLAGS = -w
214endif
215# Due to recursion, we must skip empty.o.
216# The empty.o file is created in the make process in order to determine
217#  the target endianness and word size. It is made before all other C
218#  files, including recordmcount.
219sub_cmd_record_mcount =					\
220	if [ $(@) != "scripts/mod/empty.o" ]; then	\
221		$(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)";	\
222	fi;
223recordmcount_source := $(srctree)/scripts/recordmcount.c \
224		    $(srctree)/scripts/recordmcount.h
225else
226sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
227	"$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
228	"$(if $(CONFIG_64BIT),64,32)" \
229	"$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \
230	"$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \
231	"$(if $(part-of-module),1,0)" "$(@)";
232recordmcount_source := $(srctree)/scripts/recordmcount.pl
233endif
234cmd_record_mcount =						\
235	if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" =	\
236	     "$(CC_FLAGS_FTRACE)" ]; then			\
237		$(sub_cmd_record_mcount)			\
238	fi;
239endif # -record-mcount
240endif
241
242define rule_cc_o_c
243	$(call echo-cmd,checksrc) $(cmd_checksrc)			  \
244	$(call echo-cmd,cc_o_c) $(cmd_cc_o_c);				  \
245	$(cmd_modversions)						  \
246	$(call echo-cmd,record_mcount)					  \
247	$(cmd_record_mcount)						  \
248	scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' >    \
249	                                              $(dot-target).tmp;  \
250	rm -f $(depfile);						  \
251	mv -f $(dot-target).tmp $(dot-target).cmd
252endef
253
254# Built-in and composite module parts
255$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
256	$(call cmd,force_checksrc)
257	$(call if_changed_rule,cc_o_c)
258
259# Single-part modules are special since we need to mark them in $(MODVERDIR)
260
261$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
262	$(call cmd,force_checksrc)
263	$(call if_changed_rule,cc_o_c)
264	@{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
265
266quiet_cmd_cc_lst_c = MKLST   $@
267      cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
268		     $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
269				     System.map $(OBJDUMP) > $@
270
271$(obj)/%.lst: $(src)/%.c FORCE
272	$(call if_changed_dep,cc_lst_c)
273
274# Compile assembler sources (.S)
275# ---------------------------------------------------------------------------
276
277modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
278
279$(real-objs-m)      : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
280$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
281
282quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
283cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $<
284
285$(obj)/%.s: $(src)/%.S FORCE
286	$(call if_changed_dep,as_s_S)
287
288quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
289cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
290
291$(obj)/%.o: $(src)/%.S FORCE
292	$(call if_changed_dep,as_o_S)
293
294targets += $(real-objs-y) $(real-objs-m) $(lib-y)
295targets += $(extra-y) $(MAKECMDGOALS) $(always)
296
297# Linker scripts preprocessor (.lds.S -> .lds)
298# ---------------------------------------------------------------------------
299quiet_cmd_cpp_lds_S = LDS     $@
300      cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
301	                     -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
302
303$(obj)/%.lds: $(src)/%.lds.S FORCE
304	$(call if_changed_dep,cpp_lds_S)
305
306# ASN.1 grammar
307# ---------------------------------------------------------------------------
308quiet_cmd_asn1_compiler = ASN.1   $@
309      cmd_asn1_compiler = $(objtree)/tools/asn1_compiler $< \
310				$(subst .h,.c,$@) $(subst .c,.h,$@)
311
312$(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/tools/asn1_compiler
313	$(call cmd,asn1_compiler)
314
315# Build the compiled-in targets
316# ---------------------------------------------------------------------------
317
318# To build objects in subdirs, we need to descend into the directories
319$(sort $(subdir-obj-y)): $(subdir-ym) ;
320
321#
322# Rule to compile a set of .o files into one .o file
323#
324ifdef builtin-target
325quiet_cmd_link_o_target = AR      $@
326# If the list of objects to link is empty, just create an empty built-in.o
327cmd_link_o_target = $(if $(strip $(obj-y)),\
328		      rm -f $@; $(AR) cDPrsT $@ $(filter $(obj-y), $^), \
329		      rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@)
330
331$(builtin-target): $(obj-y) FORCE
332	$(call if_changed,link_o_target)
333
334targets += $(builtin-target)
335endif # builtin-target
336
337#
338# Rule to create modules.order file
339#
340# Create commands to either record .ko file or cat modules.order from
341# a subdirectory
342modorder-cmds =						\
343	$(foreach m, $(modorder),			\
344		$(if $(filter %/modules.order, $m),	\
345			cat $m;, echo kernel/$m;))
346
347$(modorder-target): $(subdir-ym) FORCE
348	$(Q)(cat /dev/null; $(modorder-cmds)) > $@
349
350#
351# Rule to compile a set of .o files into one .a file
352#
353ifdef lib-target
354quiet_cmd_link_l_target = AR      $@
355cmd_link_l_target = rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@ $(lib-y)
356
357$(lib-target): $(lib-y) FORCE
358	$(call if_changed,link_l_target)
359
360targets += $(lib-target)
361endif
362
363quiet_cmd_link_multi-y = AR      $@
364cmd_link_multi-y = rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@ $(filter %.o,$^)
365
366quiet_cmd_link_multi-m = AR [M]  $@
367cmd_link_multi-m = $(cmd_link_multi-y)
368
369$(multi-used-y): FORCE
370	$(call if_changed,link_multi-y)
371$(call multi_depend, $(multi-used-y), .o, -objs -y)
372
373$(multi-used-m): FORCE
374	$(call if_changed,link_multi-m)
375	@{ echo $(@:.o=.ko); echo $(filter %.o,$^); } > $(MODVERDIR)/$(@F:.o=.mod)
376$(call multi_depend, $(multi-used-m), .o, -objs -y)
377
378targets += $(multi-used-y) $(multi-used-m)
379
380
381# Add intermediate targets:
382# When building objects with specific suffix patterns, add intermediate
383# targets that the final targets are derived from.
384intermediate_targets = $(foreach sfx, $(2), \
385				$(patsubst %$(strip $(1)),%$(sfx), \
386					$(filter %$(strip $(1)), $(targets))))
387# %.lex.o <- %.lex.c <- %.l
388# %.tab.o <- %.tab.[ch] <- %.y
389targets += $(call intermediate_targets, .lex.o, .lex.c) \
390	   $(call intermediate_targets, .tab.o, .tab.c .tab.h)
391
392# Descending
393# ---------------------------------------------------------------------------
394
395PHONY += $(subdir-ym)
396$(subdir-ym):
397	$(Q)$(MAKE) $(build)=$@
398
399# Add FORCE to the prequisites of a target to force it to be always rebuilt.
400# ---------------------------------------------------------------------------
401
402PHONY += FORCE
403
404FORCE:
405
406# Read all saved command lines and dependencies for the $(targets) we
407# may be building above, using $(if_changed{,_dep}). As an
408# optimization, we don't need to read them if the target does not
409# exist, we will rebuild anyway in that case.
410
411cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
412
413ifneq ($(cmd_files),)
414  include $(cmd_files)
415endif
416
417# Create directories for object files if they do not exist
418obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
419$(shell mkdir -p $(obj-dirs))
420
421.PHONY: $(PHONY)
422