forked from zephyrproject-rtos/zephyr
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathMakefile
1350 lines (1104 loc) · 43.6 KB
/
Makefile
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
VERSION_MAJOR = 1
VERSION_MINOR = 7
PATCHLEVEL = 99
VERSION_RESERVED = 0
EXTRAVERSION =
NAME = Zephyr Kernel
export SOURCE_DIR PROJECT
ifeq ($(MAKECMDGOALS),)
$(error Invoking make from top-level kernel directory is not supported)
endif
# *DOCUMENTATION*
# To see a list of typical targets execute "make help"
# More info can be located in ./README
# Comments in this file are targeted only to the developer, do not
# expect to learn how to build the kernel reading this file.
#
# o Do not use make's built-in rules and variables
# (this increases performance and avoids hard-to-debug behaviour);
# o Look for make include files relative to root of kernel src
MAKEFLAGS += -rR --include-dir=$(CURDIR)
UNAME := $(shell uname)
ifeq (MSYS, $(findstring MSYS, $(UNAME)))
DISABLE_TRYRUN=y
HOST_OS=MSYS
PWD_OPT=-W
else ifeq (MINGW, $(findstring MINGW, $(UNAME)))
HOST_OS=MINGW
PWD_OPT=-W
DISABLE_TRYRUN=y
CPATH ?= $(MIGW_DIR)/include
LIBRARY_PATH ?= $(MINGW_DIR)/lib
export CPATH LIBRARY_PATH
else ifeq (Linux, $(findstring Linux, $(UNAME)))
HOST_OS=Linux
else ifeq (Darwin, $(findstring Darwin, $(UNAME)))
HOST_OS=Darwin
endif
export HOST_OS
# Avoid funny character set dependencies
unexport LC_ALL
LC_COLLATE=C
LC_NUMERIC=C
export LC_COLLATE LC_NUMERIC
# Avoid interference with shell env settings
unexport GREP_OPTIONS
DQUOTE = "
#This comment line is to fix the highlighting of some editors due the quote effect."
export DQUOTE
# We are using a recursive build, so we need to do a little thinking
# to get the ordering right.
#
# Most importantly: sub-Makefiles should only ever modify files in
# their own directory. If in some directory we have a dependency on
# a file in another dir (which doesn't happen often, but it's often
# unavoidable when linking the built-in.o targets which finally
# turn into the kernel binary), we will call a sub make in that other
# dir, and after that we are sure that everything which is in that
# other dir is now up to date.
#
# The only cases where we need to modify files which have global
# effects are thus separated out and done before the recursive
# descending is started. They are now explicitly listed as the
# prepare rule.
# Beautify output
# ---------------------------------------------------------------------------
#
# Normally, we echo the whole command before executing it. By making
# that echo $($(quiet)$(cmd)), we now have the possibility to set
# $(quiet) to choose other forms of output instead, e.g.
#
# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
#
# If $(quiet) is empty, the whole command will be printed.
# If it is set to "quiet_", only the short version will be printed.
# If it is set to "silent_", nothing will be printed at all, since
# the variable $(silent_cmd_cc_o_c) doesn't exist.
#
# A simple variant is to prefix commands with $(Q) - that's useful
# for commands that shall be hidden in non-verbose mode.
#
# $(Q)ln $@ :<
#
# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
# If KBUILD_VERBOSE equals 1 then the above command is displayed.
#
# To put more focus on warnings, be less verbose as default
# Use 'make V=1' to see the full commands
ifeq ("$(origin V)", "command line")
KBUILD_VERBOSE = $(V)
endif
ifndef KBUILD_VERBOSE
KBUILD_VERBOSE = 0
endif
ifeq ($(KBUILD_VERBOSE),1)
quiet =
Q =
else
quiet=quiet_
Q = @
endif
# If the user is running make -s (silent mode), suppress echoing of
# commands
ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
quiet=silent_
endif
else # make-3.8x
ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
quiet=silent_
endif
endif
export quiet Q KBUILD_VERBOSE
# kbuild supports saving output files in a separate directory.
# To locate output files in a separate directory two syntaxes are supported.
# In both cases the working directory must be the root of the kernel src.
# 1) O=
# Use "make O=dir/to/store/output/files/"
#
# 2) Set KBUILD_OUTPUT
# Set the environment variable KBUILD_OUTPUT to point to the directory
# where the output files shall be placed.
# export KBUILD_OUTPUT=dir/to/store/output/files/
# make
#
# The O= assignment takes precedence over the KBUILD_OUTPUT environment
# variable.
# KBUILD_SRC is set on invocation of make in OBJ directory
# KBUILD_SRC is not intended to be used by the regular user (for now)
ifeq ($(KBUILD_SRC),)
# OK, Make called in directory where kernel src resides
# Do we want to locate output files in a separate directory?
ifeq ("$(origin O)", "command line")
KBUILD_OUTPUT := $(O)
endif
# That's our default target when none is given on the command line
PHONY := _all
_all:
# Cancel implicit rules on top Makefile
$(CURDIR)/Makefile Makefile: ;
ifneq ($(KBUILD_OUTPUT),)
# Invoke a second make in the output directory, passing relevant variables
# check that the output directory actually exists
saved-output := $(KBUILD_OUTPUT)
KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
&& pwd $(PWD_OPT))
$(if $(KBUILD_OUTPUT),, \
$(error failed to create output directory "$(saved-output)"))
PHONY += $(MAKECMDGOALS) sub-make
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
@:
sub-make: FORCE
$(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
# Leave processing to above invocation of make
skip-makefile := 1
endif # ifneq ($(KBUILD_OUTPUT),)
endif # ifeq ($(KBUILD_SRC),)
# We process the rest of the Makefile if this is the final invocation of make
ifeq ($(skip-makefile),)
# Do not print "Entering directory ...",
# but we want to display it when entering to the output directory
# so that IDEs/editors are able to understand relative filenames.
MAKEFLAGS += --no-print-directory
# Call a source code checker (by default, "sparse") as part of the
# C compilation.
#
# Use 'make C=1' to enable checking of only re-compiled files.
# Use 'make C=2' to enable checking of *all* source files, regardless
# of whether they are re-compiled or not.
#
ifeq ("$(origin C)", "command line")
KBUILD_CHECKSRC = $(C)
endif
ifndef KBUILD_CHECKSRC
KBUILD_CHECKSRC = 0
endif
PHONY += all
_all: all
ifeq ($(KBUILD_SRC),)
# building in the source tree
srctree := .
else
ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
# building in a subdirectory of the source tree
srctree := ..
else
srctree := $(KBUILD_SRC)
endif
endif
objtree := .
src := $(srctree)
obj := $(objtree)
VPATH := $(SOURCE_DIR_PARENT) $(srctree)
export srctree objtree VPATH
# SUBARCH tells the usermode build what the underlying arch is. That is set
# first, and if a usermode build is happening, the "ARCH=um" on the command
# line overrides the setting of ARCH below. If a native build is happening,
# then ARCH is assigned, getting whatever value it gets normally, and
# SUBARCH is subsequently ignored.
SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
-e s/sun4u/sparc64/ \
-e s/arm.*/arm/ -e s/sa110/arm/ \
-e s/s390x/s390/ -e s/parisc64/parisc/ \
-e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
-e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
# Cross compiling and selecting different set of gcc/bin-utils
# ---------------------------------------------------------------------------
#
# When performing cross compilation for other architectures ARCH shall be set
# to the target architecture. (See arch/* for the possibilities).
# ARCH can be set during invocation of make:
# make ARCH=x86
# Another way is to have ARCH set in the environment.
# The default ARCH is the host where make is executed.
# CROSS_COMPILE specify the prefix used for all executables used
# during compilation. Only gcc and related bin-utils executables
# are prefixed with $(CROSS_COMPILE).
# CROSS_COMPILE can be set on the command line
# make CROSS_COMPILE=i586-pc-elf
# Alternatively CROSS_COMPILE can be set in the environment.
# A third alternative is to store a setting in .config so that plain
# "make" in the configured kernel build directory always uses that.
# Default value for CROSS_COMPILE is not to prefix executables
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
ARCH ?= $(SUBARCH)
CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
KCONFIG_CONFIG ?= .config
export KCONFIG_CONFIG
# SHELL used by kbuild
CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
else if [ -x /bin/bash ]; then echo /bin/bash; \
else echo sh; fi ; fi)
HOSTCC ?= gcc
HOSTCXX ?= g++
HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
HOSTCXXFLAGS = -O2
ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
-Wno-missing-field-initializers -fno-delete-null-pointer-checks
endif
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
KBUILD_BUILTIN := 1
export KBUILD_BUILTIN
export KBUILD_CHECKSRC KBUILD_SRC
# Look for make include files relative to root of kernel src
MAKEFLAGS += --include-dir=$(srctree)
# We need some generic definitions (do not try to remake the file).
$(srctree)/scripts/Kbuild.include: ;
include $(srctree)/scripts/Kbuild.include
ifeq ($(USE_CCACHE),1)
CCACHE := ccache
endif
# Make variables (CC, etc...)
AS = $(CROSS_COMPILE)as
LD = $(CROSS_COMPILE)ld
ifeq ($(USE_CCACHE),1)
CC = $(CCACHE) $(CROSS_COMPILE)gcc
CXX = $(CCACHE) $(CROSS_COMPILE)g++
else
CC ?= $(CROSS_COMPILE)gcc
CXX ?= $(CROSS_COMPILE)g++
endif
CPP = $(CC) -E
AR = $(CROSS_COMPILE)ar
NM = $(CROSS_COMPILE)nm
STRIP = $(CROSS_COMPILE)strip
OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
GDB = $(CROSS_COMPILE)gdb
READELF = $(CROSS_COMPILE)readelf
AWK = awk
ifeq ($(PREBUILT_HOST_TOOLS),)
GENOFFSET_H = scripts/gen_offset_header/gen_offset_header
FIXDEP = scripts/basic/fixdep
else
GENOFFSET_H = $(PREBUILT_HOST_TOOLS)/gen_offset_header
FIXDEP = $(PREBUILT_HOST_TOOLS)/fixdep
endif
PERL = perl
PYTHON = python
CHECK = sparse
CHECKFLAGS := -Wbitwise -Wno-return-void $(CF)
CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
ifeq ($(COMPILER),clang)
ifneq ($(CROSS_COMPILE),)
CLANG_TARGET := -target $(notdir $(CROSS_COMPILE:%-=%))
GCC_TOOLCHAIN := $(dir $(CROSS_COMPILE))
endif
ifneq ($(GCC_TOOLCHAIN),)
CLANG_GCC_TC := -gcc-toolchain $(GCC_TOOLCHAIN)
endif
ifneq ($(IA),1)
CLANG_IA_FLAG = -no-integrated-as
endif
CLANG_FLAGS := $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_IA_FLAG)
endif
# Use USERINCLUDE when you must reference the UAPI directories only.
USERINCLUDE := -include $(CURDIR)/include/generated/autoconf.h
SOC_NAME = $(subst $(DQUOTE),,$(CONFIG_SOC))
SOC_SERIES = $(subst $(DQUOTE),,$(CONFIG_SOC_SERIES))
SOC_FAMILY = $(subst $(DQUOTE),,$(CONFIG_SOC_FAMILY))
override ARCH = $(subst $(DQUOTE),,$(CONFIG_ARCH))
BOARD_NAME = $(subst $(DQUOTE),,$(CONFIG_BOARD))
KERNEL_NAME = $(subst $(DQUOTE),,$(CONFIG_KERNEL_BIN_NAME))
KERNEL_ELF_NAME = $(KERNEL_NAME).elf
KERNEL_BIN_NAME = $(KERNEL_NAME).bin
KERNEL_HEX_NAME = $(KERNEL_NAME).hex
KERNEL_STAT_NAME = $(KERNEL_NAME).stat
export SOC_FAMILY SOC_SERIES SOC_PATH SOC_NAME BOARD_NAME
export ARCH KERNEL_NAME KERNEL_ELF_NAME KERNEL_BIN_NAME KERNEL_HEX_NAME
# Use ZEPHYRINCLUDE when you must reference the include/ directory.
# Needed to be compatible with the O= option
ZEPHYRINCLUDE = \
-I$(srctree)/kernel/include \
-I$(srctree)/arch/$(ARCH)/include \
-I$(srctree)/arch/$(ARCH)/soc/$(SOC_PATH) \
-I$(srctree)/boards/$(ARCH)/$(BOARD_NAME) \
$(if $(KBUILD_SRC), -I$(srctree)/include) \
-I$(srctree)/include \
-I$(CURDIR)/include/generated \
$(USERINCLUDE) \
$(STDINCLUDE)
KBUILD_CPPFLAGS := -DKERNEL -D__ZEPHYR__=1
KBUILD_CFLAGS := -c -g -std=c99 \
-Wall \
-Wformat \
-Wformat-security \
-D_FORTIFY_SOURCE=2 \
-Wno-format-zero-length \
-Wno-main -ffreestanding
KBUILD_CXXFLAGS := -c -g -std=c++11 \
-fno-reorder-functions \
-fno-asynchronous-unwind-tables \
-fcheck-new \
-fno-defer-pop -Wall \
-Wno-unused-but-set-variable \
-Wno-format-zero-length \
-Wno-main -ffreestanding \
-ffunction-sections -fdata-sections \
-fno-rtti -fno-exceptions
KBUILD_AFLAGS := -c -g -xassembler-with-cpp -D_ASMLANGUAGE
LDFLAGS += $(call ld-option,-nostartfiles)
LDFLAGS += $(call ld-option,-nodefaultlibs)
LDFLAGS += $(call ld-option,-nostdlib)
LDFLAGS += $(call ld-option,-static)
KERNELVERSION = $(VERSION_MAJOR)$(if $(VERSION_MINOR),.$(VERSION_MINOR)$(if $(PATCHLEVEL),.$(PATCHLEVEL)))$(EXTRAVERSION)
exports += VERSION_MAJOR VERSION_MINOR PATCHLEVEL VERSION_RESERVED EXTRAVERSION
exports += KERNELRELEASE KERNELVERSION
exports += ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC CXX
exports += CPP AR NM STRIP OBJCOPY OBJDUMP GDB
exports += MAKE AWK INSTALLKERNEL PERL PYTHON GENOFFSET_H
exports += HOSTCXX HOSTCXXFLAGS CHECK CHECKFLAGS
exports += KBUILD_CPPFLAGS NOSTDINC_FLAGS ZEPHYRINCLUDE OBJCOPYFLAGS LDFLAGS
exports += KBUILD_CFLAGS KBUILD_CXXFLAGS CFLAGS_GCOV KBUILD_AFLAGS AFLAGS_KERNEL
exports += KBUILD_ARFLAGS FIXDEP
# Push the exports to sub-processes
export $(exports)
# Make the exports available to third-party build systems
PHONY += outputexports
outputexports: Makefile.export
Makefile.export: include/config/auto.conf FORCE
$(call filechk,Makefile.export)
define filechk_Makefile.export
(echo "# file is auto-generated, do not modify !"; \
echo "BOARD=$(BOARD)"; \
echo; \
$(foreach e,$(exports),echo $(e)=$($(e));) echo; \
echo "include $(O)/include/config/auto.conf";)
endef
# Files to ignore in find ... statements
export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
-name CVS -o -name .pc -o -name .hg -o -name .git \) \
-prune -o
export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
--exclude CVS --exclude .pc --exclude .hg --exclude .git
# ===========================================================================
# Rules shared between *config targets and build targets
# Basic helpers built in scripts/
PHONY += scripts_basic
ifeq ($(PREBUILT_HOST_TOOLS),)
scripts_basic:
$(Q)$(MAKE) $(build)=scripts/basic
$(Q)$(MAKE) $(build)=scripts/gen_offset_header
else
scripts_basic:
endif
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;
PHONY += outputmakefile
# outputmakefile generates a Makefile in the output directory, if using a
# separate output directory. This allows convenient use of make in the
# output directory.
outputmakefile:
ifneq ($(KBUILD_SRC),)
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
$(srctree) $(objtree) $(VERSION_MAJOR) $(VERSION_MINOR)
endif
# To make sure we do not include .config for any of the *config targets
# catch them early, and hand them over to scripts/kconfig/Makefile
# It is allowed to specify more targets when calling make, including
# mixing *config targets and build targets.
# For example 'make oldconfig all'.
# Detect when mixed targets is specified, and make a second invocation
# of make so .config is not included in this case either (for *config).
version_h := include/generated/version.h
no-dot-config-targets := pristine distclean clean mrproper help kconfig-help host-tools \
cscope gtags TAGS tags help% %docs check% \
$(version_h) headers_% kernelversion %src-pkg
config-targets := 0
mixed-targets := 0
dot-config := 1
ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
dot-config := 0
endif
endif
ifneq ($(filter config %config,$(MAKECMDGOALS)),)
config-targets := 1
ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
mixed-targets := 1
endif
endif
ifeq ($(mixed-targets),1)
# ===========================================================================
# We're called with mixed targets (*config and build targets).
# Handle them one by one.
PHONY += $(MAKECMDGOALS) __build_one_by_one
$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
@:
__build_one_by_one:
$(Q)set -e; \
for i in $(MAKECMDGOALS); do \
$(MAKE) -f $(srctree)/Makefile $$i; \
done
else
ifeq ($(config-targets),1)
# ===========================================================================
# *config targets only - make sure prerequisites are updated, and descend
# in scripts/kconfig to make the *config target
# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
# KBUILD_DEFCONFIG may point out an alternative default configuration
# used for 'make defconfig'
include $(srctree)/arch/$(subst $(DQUOTE),,$(CONFIG_ARCH))/Makefile
export KBUILD_DEFCONFIG KBUILD_KCONFIG
config: scripts_basic outputmakefile FORCE
$(Q)$(MAKE) $(build)=scripts/kconfig $@
%config: scripts_basic outputmakefile FORCE
$(Q)$(MAKE) $(build)=scripts/kconfig $@
else
# ===========================================================================
# Build targets only - this includes zephyr, arch specific targets, clean
# targets and others. In general all targets except *config targets.
# Additional helpers built in scripts/
# Carefully list dependencies so we do not try to build scripts twice
# in parallel
PHONY += scripts
scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
$(Q)$(MAKE) $(build)=$(@)
# arch/ must be last here so that .gnu.linkonce magic for interrupts/exceptions
# works as expected
ifneq ($(strip $(MAKEFILE_APP_DIR)),)
MAKEFILE_APP := $(realpath $(MAKEFILE_APP_DIR)/Makefile.app)
endif
ifneq ($(strip $(PROJECT)),)
ifneq ($(strip $(MAKEFILE_APP)), )
include $(MAKEFILE_APP)
else
-include $(PROJECT)/Makefile.app
endif
ifneq ($(strip $(KBUILD_ZEPHYR_APP)),)
export KBUILD_ZEPHYR_APP
endif
app-y := $(SOURCE_DIR)
endif
ifeq ($(dot-config),1)
# Read in config
-include include/config/auto.conf
# Read in dependencies to all Kconfig* files, make sure to run
# oldconfig if changes are detected.
-include include/config/auto.conf.cmd
# To avoid any implicit rule to kick in, define an empty command
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
# If .config is newer than include/config/auto.conf, someone tinkered
# with it and forgot to run make oldconfig.
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
# we execute the config step to be sure to catch updated Kconfig files
include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
else
# Dummy target needed, because used as prerequisite
include/config/auto.conf: ;
endif # $(dot-config)
# kernel objects are built as a static library
libs-y := kernel/
core-y := lib/ misc/ boards/ ext/ subsys/ tests/ arch/
drivers-y := drivers/
ARCH = $(subst $(DQUOTE),,$(CONFIG_ARCH))
export ARCH
ifeq ($(CONFIG_DEBUG),y)
KBUILD_CFLAGS_OPTIMIZE := -Og
else
KBUILD_CFLAGS_OPTIMIZE := -Os
endif
ifdef ZEPHYR_GCC_VARIANT
include $(srctree)/scripts/Makefile.toolchain.$(ZEPHYR_GCC_VARIANT)
else
ifneq ($(MAKECMDGOALS),htmldocs)
$(if $(CROSS_COMPILE),, \
$(error ZEPHYR_GCC_VARIANT is not set. ))
endif
endif
# Let Makefile.toolchain adjust optimization level
KBUILD_CFLAGS += $(KBUILD_CFLAGS_OPTIMIZE)
-include $(srctree)/ext/Makefile
-include $(srctree)/lib/Makefile
ifneq ($(CC),)
ifeq ($(shell $(CC) -v 2>&1 | grep -Ec "clang version|icx version"), 1)
COMPILER := clang
else
COMPILER := gcc
endif
export COMPILER
endif
# The all: target is the default when no target is given on the
# command line.
# This allow a user to issue only 'make' to build a kernel including modules
# Defaults to zephyr, but the arch makefile usually adds further targets
all: zephyr
ifdef CONFIG_READABLE_ASM
# Disable optimizations that make assembler listings hard to read.
# reorder blocks reorders the control in the function
# ipa clone creates specialized cloned functions
# partial inlining inlines only parts of functions
KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
$(call cc-option,-fno-ipa-cp-clone,) \
$(call cc-option,-fno-partial-inlining)
endif
# Some GCC variants don't support these
KBUILD_CFLAGS += $(call cc-option,-fno-asynchronous-unwind-tables,)
ifeq ($(CONFIG_STACK_CANARIES),y)
KBUILD_CFLAGS += $(call cc-option,-fstack-protector-all,)
else
KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector,)
endif
ifeq ($(CONFIG_OVERRIDE_FRAME_POINTER_DEFAULT),y)
ifeq ($(CONFIG_OMIT_FRAME_POINTER),y)
fp_arg := $(call cc-option,-fomit-frame-pointer,)
else
fp_arg := $(call cc-option,-fno-omit-frame-pointer,)
endif
endif
KBUILD_CFLAGS += $(fp_arg)
KBUILD_CXXFLAGS += $(fp_arg)
KBUILD_CFLAGS += $(subst $(DQUOTE),,$(CONFIG_COMPILER_OPT))
export LDFLAG_LINKERCMD
ifeq ($(SOC_SERIES),)
SOC_PATH = $(SOC_NAME)
else
SOC_PATH = $(SOC_FAMILY)/$(SOC_SERIES)
endif
include arch/$(ARCH)/Makefile
KBUILD_CFLAGS += $(CFLAGS)
KBUILD_CXXFLAGS += $(CXXFLAGS)
KBUILD_AFLAGS += $(CFLAGS)
ifeq ($(COMPILER),clang)
KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
# Quiet clang warning: comparison of unsigned expression < 0 is always false
KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
else
# This warning generated too much noise in a regular build.
# Use make W=1 to enable this warning (see scripts/Makefile.build)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
KBUILD_CFLAGS += $(call cc-option,-fno-reorder-functions)
ifneq (${ZEPHYR_GCC_VARIANT},xcc)
KBUILD_CFLAGS += $(call cc-option,-fno-defer-pop)
endif
endif
# We trigger additional mismatches with less inlining
ifdef CONFIG_DEBUG_SECTION_MISMATCH
KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
endif
# arch Makefile may override CC so keep this after arch Makefile is included
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
NOSTDINC_FLAGS += -isystem $(shell $(CC) -print-file-name=include-fixed)
CHECKFLAGS += $(NOSTDINC_FLAGS)
# disable pointer signed / unsigned warnings in gcc 4.0
KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
# disable invalid "can't wrap" optimizations for signed / pointers
KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
# generate an extra file that specifies the maximum amount of stack used,
# on a per-function basis.
ifdef CONFIG_STACK_USAGE
KBUILD_CFLAGS += $(call cc-option,-fstack-usage)
endif
# disallow errors like 'EXPORT_GPL(foo);' with missing header
KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
# Prohibit date/time macros, which would make the build non-deterministic
# KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
# use the deterministic mode of AR if available
KBUILD_ARFLAGS := $(call ar-option,D)
include $(srctree)/scripts/Makefile.extrawarn
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
KBUILD_CPPFLAGS += $(KCPPFLAGS)
KBUILD_AFLAGS += $(KAFLAGS)
KBUILD_CFLAGS += $(KCFLAGS)
# Use --build-id when available.
LINKFLAGPREFIX ?= -Wl,
LDFLAGS_zephyr += $(LDFLAGS)
LDFLAGS_zephyr += $(call cc-ldoption,$(LINKFLAGPREFIX)-X)
LDFLAGS_zephyr += $(call cc-ldoption,$(LINKFLAGPREFIX)-N)
LDFLAGS_zephyr += $(call cc-ldoption,$(LINKFLAGPREFIX)--gc-sections)
LDFLAGS_zephyr += $(call cc-ldoption,$(LINKFLAGPREFIX)--build-id=none)
LD_TOOLCHAIN ?= -D__GCC_LINKER_CMD__
ifdef CONFIG_HAVE_CUSTOM_LINKER_SCRIPT
KBUILD_LDS := $(subst $(DQUOTE),,$(PROJECT_BASE)/$(CONFIG_CUSTOM_LINKER_SCRIPT))
ifeq ($(wildcard $(KBUILD_LDS)),)
KBUILD_LDS := $(subst $(DQUOTE),,$(CONFIG_CUSTOM_LINKER_SCRIPT))
endif
else
# Try a board specific linker file
KBUILD_LDS := $(srctree)/boards/$(ARCH)/$(BOARD_NAME)/linker.ld
# If not available, try an SoC specific linker file
ifeq ($(wildcard $(KBUILD_LDS)),)
KBUILD_LDS := $(srctree)/arch/$(ARCH)/soc/$(SOC_PATH)/linker.ld
endif
endif
export LD_TOOLCHAIN KBUILD_LDS
ifdef MAKEFILE_TOOLCHAIN_DO_PASS2
# KBUILD_CFLAGS known at this point.
# We can now determine which multilib libraries to use
include $(srctree)/scripts/Makefile.toolchain.$(ZEPHYR_GCC_VARIANT)
endif
QEMU = $(addsuffix /,$(QEMU_BIN_PATH))$(QEMU_$(ARCH))
# The all: target is the default when no target is given on the
# command line.
# This allow a user to issue only 'make' to build a kernel including modules
# Defaults to zephyr, but the arch makefile usually adds further targets
all: $(KERNEL_BIN_NAME) $(KERNEL_STAT_NAME)
# Default kernel image to build when no specific target is given.
# KBUILD_IMAGE may be overruled on the command line or
# set in the environment
# Also any assignments in arch/$(ARCH)/Makefile take precedence over
# this default value
export KBUILD_IMAGE ?= zephyr
zephyr-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(drivers-y) \
$(libs-y)))
# Workaround for some make notdir implementations that require
# the paramenter not to end in "/".
zephyr-app-dir-root-name := $(patsubst %/,%, $(SOURCE_DIR))
zephyr-app-dir-root := $(abspath $(patsubst %, %/.., $(SOURCE_DIR)))
zephyr-alldirs := $(sort $(zephyr-dirs) $(SOURCE_DIR) $(patsubst %/,%,$(filter %/, \
$(core-) $(drivers-) $(libs-) $(app-))))
core-y := $(patsubst %/, %/built-in.o, $(core-y))
app-y := $(patsubst %, %/built-in.o, $(notdir $(zephyr-app-dir-root-name)))
drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
libs-y := $(libs-y1) $(libs-y2)
# core-y must be last here. several arches use .gnu.linkonce magic
# to register interrupt or exception handlers, and defaults under
# arch/ (part of core-y) must be linked after drivers or libs.
export KBUILD_ZEPHYR_MAIN := $(drivers-y) $(libs-y) $(core-y)
export LDFLAGS_zephyr
zephyr-deps := $(KBUILD_LDS) $(KBUILD_ZEPHYR_MAIN) $(app-y)
ALL_LIBS += $(TOOLCHAIN_LIBS)
export ALL_LIBS
LINK_LIBS := $(foreach l,$(ALL_LIBS), -l$(l))
quiet_cmd_ar_target = AR $@
# Do not put lib.a into libzephyr.a. lib.a files are to be linked separately to
# the final image
cmd_ar_target = rm -f $@; $(AR) rcT$(KBUILD_ARFLAGS) $@ \
$(filter-out %/lib.a, $(KBUILD_ZEPHYR_MAIN))
libzephyr.a: $(zephyr-deps)
$(call cmd,ar_target)
quiet_cmd_create-lnk = LINK $@
cmd_create-lnk = \
( \
echo $(LDFLAGS_zephyr); \
echo "$(LINKFLAGPREFIX)-Map=$(KERNEL_NAME).map"; \
echo "-L $(objtree)/include/generated"; \
echo "-u _OffsetAbsSyms -u _ConfigAbsSyms"; \
echo "-e __start"; \
echo "$(LINKFLAGPREFIX)--start-group"; \
echo "$(LINKFLAGPREFIX)--whole-archive"; \
echo "$(KBUILD_ZEPHYR_APP)"; \
echo "$(app-y)"; \
echo "libzephyr.a"; \
echo "$(LINKFLAGPREFIX)--no-whole-archive"; \
echo "$(filter %/lib.a, $(KBUILD_ZEPHYR_MAIN))"; \
echo "$(objtree)/arch/$(ARCH)/core/offsets/offsets.o"; \
echo "$(LINKFLAGPREFIX)--end-group"; \
echo "$(LIB_INCLUDE_DIR) $(LINK_LIBS)"; \
) > $@
$(KERNEL_NAME).lnk: $(zephyr-deps)
$(call cmd,create-lnk)
linker.cmd: $(zephyr-deps)
$(Q)$(CC) -x assembler-with-cpp -nostdinc -undef -E -P \
$(LDFLAG_LINKERCMD) $(LD_TOOLCHAIN) -I$(srctree)/include \
-I$(SOURCE_DIR) \
-I$(objtree)/include/generated $(EXTRA_LINKER_CMD_OPT) $(KBUILD_LDS) -o $@
PREBUILT_KERNEL = $(KERNEL_NAME)_prebuilt.elf
$(PREBUILT_KERNEL): $(zephyr-deps) libzephyr.a $(KBUILD_ZEPHYR_APP) $(app-y) linker.cmd $(KERNEL_NAME).lnk
$(Q)$(CC) -T linker.cmd @$(KERNEL_NAME).lnk -o $@
ASSERT_WARNING_STR := \
"\n ------------------------------------------------------------" \
"\n --- WARNING: __ASSERT() statements are globally ENABLED ---" \
"\n --- The kernel will run more slowly and uses more memory ---" \
"\n ------------------------------------------------------------\n\n" \
WARN_ABOUT_ASSERT := $(if $(CONFIG_ASSERT),echo -e -n $(ASSERT_WARNING_STR),true)
DEPRECATION_WARNING_STR := \
"\n WARNING: The board '$(BOARD)' is deprecated and will be" \
"\n removed in version $(CONFIG_BOARD_DEPRECATED)\n\n"
WARN_ABOUT_DEPRECATION := $(if $(CONFIG_BOARD_DEPRECATED),echo -e \
-n $(DEPRECATION_WARNING_STR),true)
ifeq ($(ARCH),x86)
# X86 with its IDT has very special handling for interrupt tables
include $(srctree)/arch/x86/Makefile.idt
else ifeq ($(CONFIG_GEN_ISR_TABLES),y)
# Logic for interrupt tables created by scripts/gen_isr_tables.py
include $(srctree)/arch/common/Makefile.gen_isr_tables
else
# Otherwise, nothing to do, prebuilt kernel is the real one
$(KERNEL_ELF_NAME): $(PREBUILT_KERNEL)
@cp $(PREBUILT_KERNEL) $(KERNEL_ELF_NAME)
@$(WARN_ABOUT_ASSERT)
@$(WARN_ABOUT_DEPRECATION)
endif
quiet_cmd_gen_bin = BIN $@
cmd_gen_bin = \
( \
$(OBJDUMP) -S $< > $(KERNEL_NAME).lst; \
$(OBJCOPY) -S -O binary -R .note -R .comment -R COMMON -R .eh_frame $< $@; \
$(STRIP) -s -o $(KERNEL_NAME).strip $<; \
)
$(KERNEL_BIN_NAME): $(KERNEL_ELF_NAME)
$(call cmd,gen_bin)
quiet_cmd_gen_hex = HEX $@
cmd_gen_hex = \
( \
$(OBJCOPY) -S -O ihex -R .note -R .comment -R COMMON -R .eh_frame $< $@; \
)
$(KERNEL_HEX_NAME): $(KERNEL_ELF_NAME)
$(call cmd,gen_hex)
$(KERNEL_STAT_NAME): $(KERNEL_BIN_NAME) $(KERNEL_ELF_NAME)
@$(READELF) -e $(KERNEL_ELF_NAME) > $@
ram_report: $(KERNEL_STAT_NAME)
@$(srctree)/scripts/size_report -r -o $(O)
rom_report: $(KERNEL_STAT_NAME)
@$(srctree)/scripts/size_report -F -o $(O)
zephyr: $(zephyr-deps) $(KERNEL_BIN_NAME)
ifeq ($(CONFIG_HAS_DTS),y)
define filechk_generated_dts_board.h
(echo "/* WARNING. THIS FILE IS AUTO-GENERATED. DO NOT MODIFY! */"; \
$(ZEPHYR_BASE)/scripts/extract_dts_includes.py dts/$(ARCH)/$(BOARD_NAME).dts_compiled $(ZEPHYR_BASE)/dts/$(ARCH)/yaml; \
if test -e $(ZEPHYR_BASE)/dts/$(ARCH)/$(BOARD_NAME).fixup; then \
echo; echo; \
echo "/* Following definitions fixup the generated include */"; \
echo; \
cat $(ZEPHYR_BASE)/dts/$(ARCH)/$(BOARD_NAME).fixup; \
fi; \
)
endef
else
define filechk_generated_dts_board.h
(echo "/* WARNING. THIS FILE IS AUTO-GENERATED. DO NOT MODIFY! */";)
endef
endif
include/generated/generated_dts_board.h: include/config/auto.conf FORCE
ifeq ($(CONFIG_HAS_DTS),y)
$(Q)$(MAKE) $(build)=dts/$(ARCH)
endif
$(call filechk,generated_dts_board.h)
dts: include/generated/generated_dts_board.h
# The actual objects are generated when descending,
# make sure no implicit rule kicks in
$(sort $(zephyr-deps)): $(zephyr-dirs) zephyr-app-dir ;
# Handle descending into subdirectories listed in $(zephyr-dirs)
# Preset locale variables to speed up the build process. Limit locale
# tweaks to this spot to avoid wrong language settings when running
# make menuconfig etc.
# Error messages still appears in the original language
PHONY += $(zephyr-dirs)
$(zephyr-dirs): prepare scripts
$(Q)$(MAKE) $(build)=$@
PHONY += zephyr-app-dir
zephyr-app-dir: prepare scripts
$(Q)$(MAKE) $(build)=$(notdir $(zephyr-app-dir-root-name)) \
srctree=$(zephyr-app-dir-root)
# Things we need to do before we recursively start building the kernel
# or the modules are listed in "prepare".
# A multi level approach is used. prepareN is processed before prepareN-1.
# archprepare is used in arch Makefiles and when processed asm symlink,
# version.h and scripts_basic is processed / created.
# Listed in dependency order
PHONY += prepare prepare1 prepare2 prepare3
# prepare3 is used to check if we are building in a separate output directory,
# and if so do:
# 1) Check that make has not been executed in the kernel src $(srctree)
prepare3:
ifneq ($(KBUILD_SRC),)
@$(kecho) ' Using $(srctree) as source for kernel'
$(Q)if [ -f $(srctree)/.config ]; then \
echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
echo >&2 " in the '$(srctree)' directory.";\
/bin/false; \
fi;
endif
# prepare2 creates a makefile if using a separate output directory
prepare2: prepare3 outputmakefile
prepare1: prepare2 $(version_h) \
include/config/auto.conf
archprepare_common = $(strip \
prepare1 scripts_basic \
)
archprepare = $(strip \