Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | # ========================================================================== |
| 3 | # Building |
| 4 | # ========================================================================== |
| 5 | |
| 6 | src := $(obj) |
| 7 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 8 | PHONY := __build |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | __build: |
| 10 | |
Sam Ravnborg | d72e5ed | 2007-05-28 22:47:48 +0200 | [diff] [blame] | 11 | # Init all relevant variables used in kbuild files so |
| 12 | # 1) they have correct type |
| 13 | # 2) they do not inherit any value from the environment |
| 14 | obj-y := |
| 15 | obj-m := |
| 16 | lib-y := |
| 17 | lib-m := |
Masahiro Yamada | 5f2fb52 | 2020-02-02 01:49:24 +0900 | [diff] [blame] | 18 | always-y := |
| 19 | always-m := |
Sam Ravnborg | d72e5ed | 2007-05-28 22:47:48 +0200 | [diff] [blame] | 20 | targets := |
| 21 | subdir-y := |
| 22 | subdir-m := |
| 23 | EXTRA_AFLAGS := |
| 24 | EXTRA_CFLAGS := |
| 25 | EXTRA_CPPFLAGS := |
| 26 | EXTRA_LDFLAGS := |
Sam Ravnborg | f77bf01 | 2007-10-15 22:25:06 +0200 | [diff] [blame] | 27 | asflags-y := |
| 28 | ccflags-y := |
| 29 | cppflags-y := |
| 30 | ldflags-y := |
Sam Ravnborg | d72e5ed | 2007-05-28 22:47:48 +0200 | [diff] [blame] | 31 | |
Sam Ravnborg | 720097d | 2009-04-19 11:04:26 +0200 | [diff] [blame] | 32 | subdir-asflags-y := |
| 33 | subdir-ccflags-y := |
| 34 | |
Robert P. J. Day | 3156fd0 | 2008-02-18 04:48:20 -0500 | [diff] [blame] | 35 | # Read auto.conf if it exists, otherwise ignore |
Roman Zippel | c955cca | 2006-06-08 22:12:39 -0700 | [diff] [blame] | 36 | -include include/config/auto.conf |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Masahiro Yamada | 3204a7f | 2021-02-28 15:10:26 +0900 | [diff] [blame] | 38 | include $(srctree)/scripts/Kbuild.include |
Masahiro Yamada | 57fd251 | 2021-02-28 15:10:27 +0900 | [diff] [blame] | 39 | include $(srctree)/scripts/Makefile.compiler |
Sam Ravnborg | 20a468b | 2006-01-22 13:34:15 +0100 | [diff] [blame] | 40 | |
Sam Ravnborg | 2a69147 | 2005-07-25 20:26:04 +0000 | [diff] [blame] | 41 | # The filename Kbuild has precedence over Makefile |
Sam Ravnborg | db8c1a7 | 2005-07-27 22:11:01 +0200 | [diff] [blame] | 42 | kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) |
Sam Ravnborg | 0c53c8e | 2007-10-14 22:26:53 +0200 | [diff] [blame] | 43 | kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) |
| 44 | include $(kbuild-file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Masahiro Yamada | 3204a7f | 2021-02-28 15:10:26 +0900 | [diff] [blame] | 46 | include $(srctree)/scripts/Makefile.lib |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Masahiro Yamada | 85569d1 | 2020-07-29 12:15:37 +0900 | [diff] [blame] | 48 | # Do not include hostprogs rules unless needed. |
| 49 | # $(sort ...) is used here to remove duplicated words and excessive spaces. |
| 50 | hostprogs := $(sort $(hostprogs)) |
Masahiro Yamada | 42640b13 | 2020-07-29 12:15:36 +0900 | [diff] [blame] | 51 | ifneq ($(hostprogs),) |
Masahiro Yamada | 3204a7f | 2021-02-28 15:10:26 +0900 | [diff] [blame] | 52 | include $(srctree)/scripts/Makefile.host |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | endif |
| 54 | |
Masahiro Yamada | 7f3a59d | 2020-04-29 12:45:14 +0900 | [diff] [blame] | 55 | # Do not include userprogs rules unless needed. |
Masahiro Yamada | 85569d1 | 2020-07-29 12:15:37 +0900 | [diff] [blame] | 56 | # $(sort ...) is used here to remove duplicated words and excessive spaces. |
Masahiro Yamada | 7f3a59d | 2020-04-29 12:45:14 +0900 | [diff] [blame] | 57 | userprogs := $(sort $(userprogs)) |
| 58 | ifneq ($(userprogs),) |
Masahiro Yamada | 3204a7f | 2021-02-28 15:10:26 +0900 | [diff] [blame] | 59 | include $(srctree)/scripts/Makefile.userprogs |
Masahiro Yamada | 7f3a59d | 2020-04-29 12:45:14 +0900 | [diff] [blame] | 60 | endif |
| 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | ifndef obj |
| 63 | $(warning kbuild: Makefile.build is included improperly) |
| 64 | endif |
| 65 | |
Masahiro Yamada | 394053f | 2019-08-15 00:19:18 +0900 | [diff] [blame] | 66 | ifeq ($(need-modorder),) |
Masahiro Yamada | c07d8d47 | 2019-08-08 20:21:11 +0900 | [diff] [blame] | 67 | ifneq ($(obj-m),) |
| 68 | $(warning $(patsubst %.o,'%.ko',$(obj-m)) will not be built even though obj-m is specified.) |
| 69 | $(warning You cannot use subdir-y/m to visit a module Makefile. Use obj-y/m instead.) |
| 70 | endif |
| 71 | endif |
| 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | # =========================================================================== |
| 74 | |
Masahiro Yamada | 454753d | 2020-05-22 11:00:02 +0900 | [diff] [blame] | 75 | # subdir-builtin and subdir-modorder may contain duplications. Use $(sort ...) |
Masahiro Yamada | aaa385b | 2020-05-22 11:00:01 +0900 | [diff] [blame] | 76 | subdir-builtin := $(sort $(filter %/built-in.a, $(real-obj-y))) |
Masahiro Yamada | b2c8855 | 2020-06-01 14:57:00 +0900 | [diff] [blame] | 77 | subdir-modorder := $(sort $(filter %/modules.order, $(obj-m))) |
Masahiro Yamada | 6ba3bcb | 2020-05-22 11:00:00 +0900 | [diff] [blame] | 78 | |
Masahiro Yamada | f3908ab | 2020-06-01 14:56:56 +0900 | [diff] [blame] | 79 | targets-for-builtin := $(extra-y) |
| 80 | |
Masahiro Yamada | a4954fd | 2014-09-09 19:26:21 +0900 | [diff] [blame] | 81 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) |
Masahiro Yamada | f3908ab | 2020-06-01 14:56:56 +0900 | [diff] [blame] | 82 | targets-for-builtin += $(obj)/lib.a |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | endif |
| 84 | |
Masahiro Yamada | 56d5893 | 2019-12-19 01:04:28 +0900 | [diff] [blame] | 85 | ifdef need-builtin |
Masahiro Yamada | f3908ab | 2020-06-01 14:56:56 +0900 | [diff] [blame] | 86 | targets-for-builtin += $(obj)/built-in.a |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | endif |
| 88 | |
Masahiro Yamada | b2c8855 | 2020-06-01 14:57:00 +0900 | [diff] [blame] | 89 | targets-for-modules := $(patsubst %.o, %.mod, $(filter %.o, $(obj-m))) |
Masahiro Yamada | f3908ab | 2020-06-01 14:56:56 +0900 | [diff] [blame] | 90 | |
Masahiro Yamada | b480fec | 2020-05-22 10:59:59 +0900 | [diff] [blame] | 91 | ifdef need-modorder |
Masahiro Yamada | f3908ab | 2020-06-01 14:56:56 +0900 | [diff] [blame] | 92 | targets-for-modules += $(obj)/modules.order |
Masahiro Yamada | 1d8001e | 2019-02-14 12:05:15 +0900 | [diff] [blame] | 93 | endif |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 94 | |
Masahiro Yamada | f3908ab | 2020-06-01 14:56:56 +0900 | [diff] [blame] | 95 | targets += $(targets-for-builtin) $(targets-for-modules) |
Masahiro Yamada | 9f69a49 | 2019-07-17 15:18:00 +0900 | [diff] [blame] | 96 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | # Linus' kernel sanity checking tool |
Masahiro Yamada | 7d0ea25 | 2018-10-10 00:05:39 +0900 | [diff] [blame] | 98 | ifeq ($(KBUILD_CHECKSRC),1) |
| 99 | quiet_cmd_checksrc = CHECK $< |
Masahiro Yamada | e5d2891 | 2018-11-30 10:05:28 +0900 | [diff] [blame] | 100 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< |
Masahiro Yamada | 7d0ea25 | 2018-10-10 00:05:39 +0900 | [diff] [blame] | 101 | else ifeq ($(KBUILD_CHECKSRC),2) |
| 102 | quiet_cmd_force_checksrc = CHECK $< |
Masahiro Yamada | e5d2891 | 2018-11-30 10:05:28 +0900 | [diff] [blame] | 103 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | endif |
| 105 | |
Masahiro Yamada | e27128d | 2019-09-01 01:25:55 +0900 | [diff] [blame] | 106 | ifneq ($(KBUILD_EXTRA_WARN),) |
Masahiro Yamada | e5d2891 | 2018-11-30 10:05:28 +0900 | [diff] [blame] | 107 | cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $< |
Matthew Wilcox | 3a025e1 | 2017-11-20 10:40:40 -0800 | [diff] [blame] | 108 | endif |
| 109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | # Compile C sources (.c) |
| 111 | # --------------------------------------------------------------------------- |
| 112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ |
Sami Tolvanen | dc5723b | 2020-12-11 10:46:19 -0800 | [diff] [blame] | 114 | cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS) $(CC_FLAGS_LTO), $(c_flags)) -fverbose-asm -S -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 116 | $(obj)/%.s: $(src)/%.c FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | $(call if_changed_dep,cc_s_c) |
| 118 | |
Masahiro Yamada | 23d4384 | 2016-04-08 11:24:47 +0900 | [diff] [blame] | 119 | quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@ |
| 120 | cmd_cpp_i_c = $(CPP) $(c_flags) -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 122 | $(obj)/%.i: $(src)/%.c FORCE |
Masahiro Yamada | 23d4384 | 2016-04-08 11:24:47 +0900 | [diff] [blame] | 123 | $(call if_changed_dep,cpp_i_c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 125 | # These mirror gensymtypes_S and co below, keep them in synch. |
| 126 | cmd_gensymtypes_c = \ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 127 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
Masahiro Yamada | 8811071 | 2019-02-20 12:38:31 +0900 | [diff] [blame] | 128 | scripts/genksyms/genksyms $(if $(1), -T $(2)) \ |
Ard Biesheuvel | 5606781 | 2017-02-03 09:54:05 +0000 | [diff] [blame] | 129 | $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 130 | $(if $(KBUILD_PRESERVE),-p) \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 131 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 132 | |
Andreas Gruenbacher | 15fde67 | 2006-05-09 20:37:30 +0200 | [diff] [blame] | 133 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 134 | cmd_cc_symtypes_c = \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 135 | $(call cmd_gensymtypes_c,true,$@) >/dev/null; \ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 136 | test -s $@ || rm -f $@ |
Andreas Gruenbacher | 15fde67 | 2006-05-09 20:37:30 +0200 | [diff] [blame] | 137 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 138 | $(obj)/%.symtypes : $(src)/%.c FORCE |
Andreas Gruenbacher | 64e6c1e | 2008-12-01 14:21:01 -0800 | [diff] [blame] | 139 | $(call cmd,cc_symtypes_c) |
Andreas Gruenbacher | 15fde67 | 2006-05-09 20:37:30 +0200 | [diff] [blame] | 140 | |
VinÃcius Tinti | 433db3e | 2017-04-24 13:04:58 -0700 | [diff] [blame] | 141 | # LLVM assembly |
| 142 | # Generate .ll files from .c |
| 143 | quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@ |
| 144 | cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $< |
| 145 | |
| 146 | $(obj)/%.ll: $(src)/%.c FORCE |
| 147 | $(call if_changed_dep,cc_ll_c) |
| 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | # C (.c) files |
| 150 | # The C file is compiled and updated dependency information is generated. |
| 151 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) |
| 152 | |
| 153 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ |
Masahiro Yamada | ee3e46b | 2018-11-30 10:05:25 +0900 | [diff] [blame] | 154 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Masahiro Yamada | ee3e46b | 2018-11-30 10:05:25 +0900 | [diff] [blame] | 156 | ifdef CONFIG_MODVERSIONS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | # When module versioning is enabled the following steps are executed: |
Masahiro Yamada | ee3e46b | 2018-11-30 10:05:25 +0900 | [diff] [blame] | 158 | # o compile a <file>.o from <file>.c |
| 159 | # o if <file>.o doesn't contain a __ksymtab version, i.e. does |
| 160 | # not export symbols, it's done. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | # o otherwise, we calculate symbol versions using the good old |
| 162 | # genksyms on the preprocessed source and postprocess them in a way |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 163 | # that they are usable as a linker script |
Masahiro Yamada | ee3e46b | 2018-11-30 10:05:25 +0900 | [diff] [blame] | 164 | # o generate .tmp_<file>.o from <file>.o using the linker to |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 165 | # replace the unresolved symbols __crc_exported_symbol with |
| 166 | # the actual value of the checksum generated by genksyms |
Masahiro Yamada | ee3e46b | 2018-11-30 10:05:25 +0900 | [diff] [blame] | 167 | # o remove .tmp_<file>.o to <file>.o |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 168 | |
Sami Tolvanen | 38e8918 | 2020-12-11 10:46:20 -0800 | [diff] [blame] | 169 | ifdef CONFIG_LTO_CLANG |
| 170 | # Generate .o.symversions files for each .o with exported symbols, and link these |
| 171 | # to the kernel and/or modules at the end. |
| 172 | cmd_modversions_c = \ |
| 173 | if $(NM) $@ 2>/dev/null | grep -q __ksymtab; then \ |
| 174 | $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
| 175 | > $@.symversions; \ |
| 176 | fi; |
| 177 | else |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 178 | cmd_modversions_c = \ |
Masahiro Yamada | ee3e46b | 2018-11-30 10:05:25 +0900 | [diff] [blame] | 179 | if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 180 | $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 181 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
| 182 | \ |
Masahiro Yamada | ee3e46b | 2018-11-30 10:05:25 +0900 | [diff] [blame] | 183 | $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 184 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 185 | mv -f $(@D)/.tmp_$(@F) $@; \ |
Masahiro Yamada | ee3e46b | 2018-11-30 10:05:25 +0900 | [diff] [blame] | 186 | rm -f $(@D)/.tmp_$(@F:.o=.ver); \ |
Masahiro Yamada | e5d2891 | 2018-11-30 10:05:28 +0900 | [diff] [blame] | 187 | fi |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | endif |
Sami Tolvanen | 38e8918 | 2020-12-11 10:46:20 -0800 | [diff] [blame] | 189 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
Sami Tolvanen | 3b15cdc1 | 2020-12-11 10:46:18 -0800 | [diff] [blame] | 191 | ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT |
Vasily Gorbik | 07d0408 | 2018-08-06 15:17:44 +0200 | [diff] [blame] | 192 | # compiler will not generate __mcount_loc use recordmcount or recordmcount.pl |
Steven Rostedt | 72441cb | 2010-10-13 17:12:30 -0400 | [diff] [blame] | 193 | ifdef BUILD_C_RECORDMCOUNT |
Steven Rostedt | 85356f8 | 2011-04-12 18:59:10 -0400 | [diff] [blame] | 194 | ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") |
| 195 | RECORDMCOUNT_FLAGS = -w |
| 196 | endif |
Steven Rostedt | d7b4d6d | 2010-10-18 14:42:00 -0400 | [diff] [blame] | 197 | # Due to recursion, we must skip empty.o. |
| 198 | # The empty.o file is created in the make process in order to determine |
Cao jin | 312a3d0 | 2017-08-02 10:31:06 +0800 | [diff] [blame] | 199 | # the target endianness and word size. It is made before all other C |
| 200 | # files, including recordmcount. |
Wu Zhangjin | 4567745 | 2010-10-28 00:24:34 +0800 | [diff] [blame] | 201 | sub_cmd_record_mcount = \ |
| 202 | if [ $(@) != "scripts/mod/empty.o" ]; then \ |
Steven Rostedt | 85356f8 | 2011-04-12 18:59:10 -0400 | [diff] [blame] | 203 | $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ |
Wu Zhangjin | 4567745 | 2010-10-28 00:24:34 +0800 | [diff] [blame] | 204 | fi; |
Michal Marek | d697182 | 2011-05-17 15:36:46 +0200 | [diff] [blame] | 205 | recordmcount_source := $(srctree)/scripts/recordmcount.c \ |
| 206 | $(srctree)/scripts/recordmcount.h |
Steven Rostedt | 72441cb | 2010-10-13 17:12:30 -0400 | [diff] [blame] | 207 | else |
Masahiro Yamada | 4317ee3 | 2018-11-30 10:05:24 +0900 | [diff] [blame] | 208 | sub_cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
Wu Zhangjin | e6299d2 | 2009-11-20 20:34:31 +0800 | [diff] [blame] | 209 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
Steven Rostedt | b3acf29 | 2008-10-29 15:30:26 -0400 | [diff] [blame] | 210 | "$(if $(CONFIG_64BIT),64,32)" \ |
Joel Stanley | 5a4630a | 2018-09-17 17:07:54 +0930 | [diff] [blame] | 211 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \ |
Masahiro Yamada | d503ac5 | 2018-08-24 08:20:39 +0900 | [diff] [blame] | 212 | "$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \ |
Shaohua Li | 18c167f | 2009-01-12 10:00:51 +0800 | [diff] [blame] | 213 | "$(if $(part-of-module),1,0)" "$(@)"; |
Michal Marek | d697182 | 2011-05-17 15:36:46 +0200 | [diff] [blame] | 214 | recordmcount_source := $(srctree)/scripts/recordmcount.pl |
Cao jin | 312a3d0 | 2017-08-02 10:31:06 +0800 | [diff] [blame] | 215 | endif # BUILD_C_RECORDMCOUNT |
Joe Lawrence | 1a49b2f | 2019-03-26 10:50:28 -0400 | [diff] [blame] | 216 | cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), \ |
| 217 | $(sub_cmd_record_mcount)) |
Sami Tolvanen | 3b15cdc1 | 2020-12-11 10:46:18 -0800 | [diff] [blame] | 218 | endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT |
Steven Rostedt | 8da3821 | 2008-08-14 15:45:07 -0400 | [diff] [blame] | 219 | |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 220 | ifdef CONFIG_STACK_VALIDATION |
Sami Tolvanen | b1a1a1a | 2020-04-13 16:10:13 -0700 | [diff] [blame] | 221 | ifndef CONFIG_LTO_CLANG |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 222 | |
| 223 | __objtool_obj := $(objtree)/tools/objtool/objtool |
| 224 | |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 225 | # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory |
| 226 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file |
| 227 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file |
| 228 | cmd_objtool = $(if $(patsubst y%,, \ |
| 229 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ |
Masahiro Yamada | e5d2891 | 2018-11-30 10:05:28 +0900 | [diff] [blame] | 230 | $(__objtool_obj) $(objtool_args) $@) |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 231 | objtool_obj = $(if $(patsubst y%,, \ |
| 232 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ |
| 233 | $(__objtool_obj)) |
| 234 | |
Sami Tolvanen | b1a1a1a | 2020-04-13 16:10:13 -0700 | [diff] [blame] | 235 | endif # CONFIG_LTO_CLANG |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 236 | endif # CONFIG_STACK_VALIDATION |
| 237 | |
Josh Poimboeuf | ee9f8fc | 2017-07-24 18:36:57 -0500 | [diff] [blame] | 238 | # Rebuild all objects when objtool changes, or is enabled/disabled. |
| 239 | objtool_dep = $(objtool_obj) \ |
Alexey Dobriyan | 0e0345b | 2021-04-15 20:36:07 +0300 | [diff] [blame] | 240 | $(wildcard include/config/ORC_UNWINDER \ |
| 241 | include/config/STACK_VALIDATION) |
Josh Poimboeuf | ee9f8fc | 2017-07-24 18:36:57 -0500 | [diff] [blame] | 242 | |
Masahiro Yamada | bbda5ec | 2018-11-30 10:05:26 +0900 | [diff] [blame] | 243 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
| 244 | cmd_gen_ksymdeps = \ |
Masahiro Yamada | e5d2891 | 2018-11-30 10:05:28 +0900 | [diff] [blame] | 245 | $(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd |
Masahiro Yamada | 7d32358 | 2020-12-04 02:55:51 +0900 | [diff] [blame] | 246 | |
| 247 | # List module undefined symbols |
| 248 | undefined_syms = $(NM) $< | $(AWK) '$$1 == "U" { printf("%s%s", x++ ? " " : "", $$2) }'; |
Masahiro Yamada | bbda5ec | 2018-11-30 10:05:26 +0900 | [diff] [blame] | 249 | endif |
| 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | define rule_cc_o_c |
Masahiro Yamada | 3a2429e | 2018-11-30 10:05:27 +0900 | [diff] [blame] | 252 | $(call cmd_and_fixdep,cc_o_c) |
| 253 | $(call cmd,gen_ksymdeps) |
Luc Van Oostenryck | 0c33f12 | 2020-06-22 17:45:12 +0200 | [diff] [blame] | 254 | $(call cmd,checksrc) |
Masahiro Yamada | 3a2429e | 2018-11-30 10:05:27 +0900 | [diff] [blame] | 255 | $(call cmd,checkdoc) |
| 256 | $(call cmd,objtool) |
| 257 | $(call cmd,modversions_c) |
| 258 | $(call cmd,record_mcount) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | endef |
| 260 | |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 261 | define rule_as_o_S |
Masahiro Yamada | 3a2429e | 2018-11-30 10:05:27 +0900 | [diff] [blame] | 262 | $(call cmd_and_fixdep,as_o_S) |
| 263 | $(call cmd,gen_ksymdeps) |
| 264 | $(call cmd,objtool) |
| 265 | $(call cmd,modversions_S) |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 266 | endef |
| 267 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | # Built-in and composite module parts |
Josh Poimboeuf | 8852c55 | 2021-05-18 18:59:15 -0500 | [diff] [blame] | 269 | .SECONDEXPANSION: |
| 270 | $(obj)/%.o: $(src)/%.c $(recordmcount_source) $$(objtool_dep) FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | $(call if_changed_rule,cc_o_c) |
Luc Van Oostenryck | 0c33f12 | 2020-06-22 17:45:12 +0200 | [diff] [blame] | 272 | $(call cmd,force_checksrc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
Masahiro Yamada | 9f69a49 | 2019-07-17 15:18:00 +0900 | [diff] [blame] | 274 | cmd_mod = { \ |
| 275 | echo $(if $($*-objs)$($*-y)$($*-m), $(addprefix $(obj)/, $($*-objs) $($*-y) $($*-m)), $(@:.mod=.o)); \ |
Masahiro Yamada | 7d32358 | 2020-12-04 02:55:51 +0900 | [diff] [blame] | 276 | $(undefined_syms) echo; \ |
Masahiro Yamada | 9f69a49 | 2019-07-17 15:18:00 +0900 | [diff] [blame] | 277 | } > $@ |
| 278 | |
| 279 | $(obj)/%.mod: $(obj)/%.o FORCE |
| 280 | $(call if_changed,mod) |
| 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | quiet_cmd_cc_lst_c = MKLST $@ |
| 283 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ |
| 284 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ |
| 285 | System.map $(OBJDUMP) > $@ |
| 286 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 287 | $(obj)/%.lst: $(src)/%.c FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | $(call if_changed_dep,cc_lst_c) |
| 289 | |
| 290 | # Compile assembler sources (.S) |
| 291 | # --------------------------------------------------------------------------- |
| 292 | |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 293 | # .S file exports must have their C prototypes defined in asm/asm-prototypes.h |
| 294 | # or a file that it includes, in order to get versioned symbols. We build a |
| 295 | # dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from |
| 296 | # the .S file (with trailing ';'), and run genksyms on that, to extract vers. |
| 297 | # |
| 298 | # This is convoluted. The .S file must first be preprocessed to run guards and |
| 299 | # expand names, then the resulting exports must be constructed into plain |
| 300 | # EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed |
| 301 | # to make the genksyms input. |
| 302 | # |
| 303 | # These mirror gensymtypes_c and co above, keep them in synch. |
| 304 | cmd_gensymtypes_S = \ |
Masahiro Yamada | b79c6aa | 2019-01-17 19:02:44 +0900 | [diff] [blame] | 305 | { echo "\#include <linux/kernel.h>" ; \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 306 | echo "\#include <asm/asm-prototypes.h>" ; \ |
| 307 | $(CPP) $(a_flags) $< | \ |
Nicholas Piggin | cc6acc1 | 2016-11-09 15:34:05 +1100 | [diff] [blame] | 308 | grep "\<___EXPORT_SYMBOL\>" | \ |
Masahiro Yamada | b79c6aa | 2019-01-17 19:02:44 +0900 | [diff] [blame] | 309 | sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ; } | \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 310 | $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \ |
Masahiro Yamada | 8811071 | 2019-02-20 12:38:31 +0900 | [diff] [blame] | 311 | scripts/genksyms/genksyms $(if $(1), -T $(2)) \ |
Ard Biesheuvel | 5606781 | 2017-02-03 09:54:05 +0000 | [diff] [blame] | 312 | $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 313 | $(if $(KBUILD_PRESERVE),-p) \ |
| 314 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
| 315 | |
| 316 | quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@ |
| 317 | cmd_cc_symtypes_S = \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 318 | $(call cmd_gensymtypes_S,true,$@) >/dev/null; \ |
| 319 | test -s $@ || rm -f $@ |
| 320 | |
| 321 | $(obj)/%.symtypes : $(src)/%.S FORCE |
| 322 | $(call cmd,cc_symtypes_S) |
| 323 | |
| 324 | |
Masahiro Yamada | e0f41e5 | 2016-04-08 11:24:48 +0900 | [diff] [blame] | 325 | quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@ |
| 326 | cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 328 | $(obj)/%.s: $(src)/%.S FORCE |
Masahiro Yamada | e0f41e5 | 2016-04-08 11:24:48 +0900 | [diff] [blame] | 329 | $(call if_changed_dep,cpp_s_S) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | |
| 331 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ |
Masahiro Yamada | ee3e46b | 2018-11-30 10:05:25 +0900 | [diff] [blame] | 332 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 333 | |
Masahiro Yamada | 2ff2b7e | 2019-08-19 14:54:20 +0900 | [diff] [blame] | 334 | ifdef CONFIG_ASM_MODVERSIONS |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 335 | |
| 336 | # versioning matches the C process described above, with difference that |
| 337 | # we parse asm-prototypes.h C header to get function definitions. |
| 338 | |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 339 | cmd_modversions_S = \ |
Masahiro Yamada | ee3e46b | 2018-11-30 10:05:25 +0900 | [diff] [blame] | 340 | if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 341 | $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
| 342 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
| 343 | \ |
Masahiro Yamada | ee3e46b | 2018-11-30 10:05:25 +0900 | [diff] [blame] | 344 | $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 345 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 346 | mv -f $(@D)/.tmp_$(@F) $@; \ |
Masahiro Yamada | ee3e46b | 2018-11-30 10:05:25 +0900 | [diff] [blame] | 347 | rm -f $(@D)/.tmp_$(@F:.o=.ver); \ |
Masahiro Yamada | e5d2891 | 2018-11-30 10:05:28 +0900 | [diff] [blame] | 348 | fi |
Nicholas Piggin | 4efca4e | 2016-11-01 12:46:19 +1100 | [diff] [blame] | 349 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
Josh Poimboeuf | 8852c55 | 2021-05-18 18:59:15 -0500 | [diff] [blame] | 351 | $(obj)/%.o: $(src)/%.S $$(objtool_dep) FORCE |
Josh Poimboeuf | b9ab5eb | 2016-02-28 22:22:42 -0600 | [diff] [blame] | 352 | $(call if_changed_rule,as_o_S) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | |
Masahiro Yamada | b2c8855 | 2020-06-01 14:57:00 +0900 | [diff] [blame] | 354 | targets += $(filter-out $(subdir-builtin), $(real-obj-y)) |
| 355 | targets += $(filter-out $(subdir-modorder), $(real-obj-m)) |
Masahiro Yamada | bcf0c66 | 2021-05-03 03:09:56 +0900 | [diff] [blame] | 356 | targets += $(real-dtb-y) $(lib-y) $(always-y) $(MAKECMDGOALS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | |
| 358 | # Linker scripts preprocessor (.lds.S -> .lds) |
| 359 | # --------------------------------------------------------------------------- |
| 360 | quiet_cmd_cpp_lds_S = LDS $@ |
Linus Torvalds | 5cb0512 | 2017-11-02 14:10:37 -0700 | [diff] [blame] | 361 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \ |
Tim Abbott | 42f29a2 | 2009-09-20 18:14:12 -0400 | [diff] [blame] | 362 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 364 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | $(call if_changed_dep,cpp_lds_S) |
| 366 | |
David Howells | 4520c6a | 2012-09-21 23:31:13 +0100 | [diff] [blame] | 367 | # ASN.1 grammar |
| 368 | # --------------------------------------------------------------------------- |
Masahiro Yamada | 49d5089 | 2019-07-21 01:27:38 +0900 | [diff] [blame] | 369 | quiet_cmd_asn1_compiler = ASN.1 $(basename $@).[ch] |
David Howells | 4520c6a | 2012-09-21 23:31:13 +0100 | [diff] [blame] | 370 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ |
Masahiro Yamada | 49d5089 | 2019-07-21 01:27:38 +0900 | [diff] [blame] | 371 | $(basename $@).c $(basename $@).h |
David Howells | 4520c6a | 2012-09-21 23:31:13 +0100 | [diff] [blame] | 372 | |
Masahiro Yamada | 4fa8bc9 | 2018-03-23 22:04:37 +0900 | [diff] [blame] | 373 | $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler |
David Howells | 4520c6a | 2012-09-21 23:31:13 +0100 | [diff] [blame] | 374 | $(call cmd,asn1_compiler) |
| 375 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | # Build the compiled-in targets |
| 377 | # --------------------------------------------------------------------------- |
| 378 | |
| 379 | # To build objects in subdirs, we need to descend into the directories |
Masahiro Yamada | aaa385b | 2020-05-22 11:00:01 +0900 | [diff] [blame] | 380 | $(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ; |
Masahiro Yamada | 454753d | 2020-05-22 11:00:02 +0900 | [diff] [blame] | 381 | $(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
Sami Tolvanen | 38e8918 | 2020-12-11 10:46:20 -0800 | [diff] [blame] | 383 | # combine symversions for later processing |
| 384 | quiet_cmd_update_lto_symversions = SYMVER $@ |
| 385 | ifeq ($(CONFIG_LTO_CLANG) $(CONFIG_MODVERSIONS),y y) |
| 386 | cmd_update_lto_symversions = \ |
| 387 | rm -f $@.symversions \ |
| 388 | $(foreach n, $(filter-out FORCE,$^), \ |
Lecopzer Chen | 1d11053 | 2021-07-15 15:37:16 +0800 | [diff] [blame] | 389 | $(if $(shell test -s $(n).symversions && echo y), \ |
Sami Tolvanen | 38e8918 | 2020-12-11 10:46:20 -0800 | [diff] [blame] | 390 | ; cat $(n).symversions >> $@.symversions)) |
| 391 | else |
| 392 | cmd_update_lto_symversions = echo >/dev/null |
| 393 | endif |
| 394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | # |
Masahiro Yamada | dee9495 | 2019-01-17 09:10:03 +0900 | [diff] [blame] | 396 | # Rule to compile a set of .o files into one .a file (without symbol table) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | # |
Stephen Rothwell | a5967db | 2016-08-24 22:29:19 +1000 | [diff] [blame] | 398 | |
Masahiro Yamada | 5e18f02 | 2018-03-19 20:26:12 +0900 | [diff] [blame] | 399 | quiet_cmd_ar_builtin = AR $@ |
Masahiro Yamada | 13dc8c0 | 2019-09-21 15:49:54 +0900 | [diff] [blame] | 400 | cmd_ar_builtin = rm -f $@; $(AR) cDPrST $@ $(real-prereqs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Sami Tolvanen | 38e8918 | 2020-12-11 10:46:20 -0800 | [diff] [blame] | 402 | quiet_cmd_ar_and_symver = AR $@ |
| 403 | cmd_ar_and_symver = $(cmd_update_lto_symversions); $(cmd_ar_builtin) |
| 404 | |
Masahiro Yamada | e578edc | 2020-05-22 10:59:58 +0900 | [diff] [blame] | 405 | $(obj)/built-in.a: $(real-obj-y) FORCE |
Sami Tolvanen | 38e8918 | 2020-12-11 10:46:20 -0800 | [diff] [blame] | 406 | $(call if_changed,ar_and_symver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | # |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 409 | # Rule to create modules.order file |
| 410 | # |
| 411 | # Create commands to either record .ko file or cat modules.order from |
| 412 | # a subdirectory |
Masahiro Yamada | b2c8855 | 2020-06-01 14:57:00 +0900 | [diff] [blame] | 413 | # Add $(obj-m) as the prerequisite to avoid updating the timestamp of |
| 414 | # modules.order unless contained modules are updated. |
| 415 | |
| 416 | cmd_modules_order = { $(foreach m, $(real-prereqs), \ |
| 417 | $(if $(filter %/modules.order, $m), cat $m, echo $(patsubst %.o,%.ko,$m));) :; } \ |
Masahiro Yamada | e0e1b1e | 2019-07-17 15:17:51 +0900 | [diff] [blame] | 418 | | $(AWK) '!x[$$0]++' - > $@ |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 419 | |
Masahiro Yamada | b2c8855 | 2020-06-01 14:57:00 +0900 | [diff] [blame] | 420 | $(obj)/modules.order: $(obj-m) FORCE |
| 421 | $(call if_changed,modules_order) |
| 422 | |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 423 | # |
Masahiro Yamada | dee9495 | 2019-01-17 09:10:03 +0900 | [diff] [blame] | 424 | # Rule to compile a set of .o files into one .a file (with symbol table) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | # |
Sami Tolvanen | 38e8918 | 2020-12-11 10:46:20 -0800 | [diff] [blame] | 426 | quiet_cmd_ar_lib = AR $@ |
| 427 | cmd_ar_lib = $(cmd_update_lto_symversions); $(cmd_ar) |
| 428 | |
Masahiro Yamada | e578edc | 2020-05-22 10:59:58 +0900 | [diff] [blame] | 429 | $(obj)/lib.a: $(lib-y) FORCE |
Sami Tolvanen | 38e8918 | 2020-12-11 10:46:20 -0800 | [diff] [blame] | 430 | $(call if_changed,ar_lib) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
Masahiro Yamada | afa974b | 2019-01-17 19:02:43 +0900 | [diff] [blame] | 432 | # NOTE: |
| 433 | # Do not replace $(filter %.o,^) with $(real-prereqs). When a single object |
| 434 | # module is turned into a multi object module, $^ will contain header file |
| 435 | # dependencies recorded in the .*.cmd file. |
Sami Tolvanen | dc5723b | 2020-12-11 10:46:19 -0800 | [diff] [blame] | 436 | ifdef CONFIG_LTO_CLANG |
| 437 | quiet_cmd_link_multi-m = AR [M] $@ |
| 438 | cmd_link_multi-m = \ |
Sami Tolvanen | 38e8918 | 2020-12-11 10:46:20 -0800 | [diff] [blame] | 439 | $(cmd_update_lto_symversions); \ |
Sami Tolvanen | dc5723b | 2020-12-11 10:46:19 -0800 | [diff] [blame] | 440 | rm -f $@; \ |
| 441 | $(AR) cDPrsT $@ $(filter %.o,$^) |
| 442 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | quiet_cmd_link_multi-m = LD [M] $@ |
Masahiro Yamada | b7dca6d | 2019-07-17 15:17:57 +0900 | [diff] [blame] | 444 | cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^) |
Sami Tolvanen | dc5723b | 2020-12-11 10:46:19 -0800 | [diff] [blame] | 445 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
Masahiro Yamada | a6601e0 | 2021-03-06 15:11:20 +0900 | [diff] [blame] | 447 | $(multi-obj-m): FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | $(call if_changed,link_multi-m) |
Masahiro Yamada | a6601e0 | 2021-03-06 15:11:20 +0900 | [diff] [blame] | 449 | $(call multi_depend, $(multi-obj-m), .o, -objs -y -m) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | |
Masahiro Yamada | a6601e0 | 2021-03-06 15:11:20 +0900 | [diff] [blame] | 451 | targets += $(multi-obj-m) |
Masahiro Yamada | 591f668 | 2017-11-13 19:29:36 +0900 | [diff] [blame] | 452 | targets := $(filter-out $(PHONY), $(targets)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | |
Masahiro Yamada | b23d1a2 | 2018-03-23 22:04:33 +0900 | [diff] [blame] | 454 | # Add intermediate targets: |
| 455 | # When building objects with specific suffix patterns, add intermediate |
| 456 | # targets that the final targets are derived from. |
| 457 | intermediate_targets = $(foreach sfx, $(2), \ |
| 458 | $(patsubst %$(strip $(1)),%$(sfx), \ |
| 459 | $(filter %$(strip $(1)), $(targets)))) |
Masahiro Yamada | 54a702f | 2018-03-23 22:04:39 +0900 | [diff] [blame] | 460 | # %.asn1.o <- %.asn1.[ch] <- %.asn1 |
Masahiro Yamada | a7f9241 | 2018-03-23 22:04:34 +0900 | [diff] [blame] | 461 | # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts |
Masahiro Yamada | b23d1a2 | 2018-03-23 22:04:33 +0900 | [diff] [blame] | 462 | # %.lex.o <- %.lex.c <- %.l |
| 463 | # %.tab.o <- %.tab.[ch] <- %.y |
Masahiro Yamada | 54a702f | 2018-03-23 22:04:39 +0900 | [diff] [blame] | 464 | targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \ |
| 465 | $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \ |
Masahiro Yamada | a7f9241 | 2018-03-23 22:04:34 +0900 | [diff] [blame] | 466 | $(call intermediate_targets, .lex.o, .lex.c) \ |
Masahiro Yamada | b23d1a2 | 2018-03-23 22:04:33 +0900 | [diff] [blame] | 467 | $(call intermediate_targets, .tab.o, .tab.c .tab.h) |
| 468 | |
Masahiro Yamada | 394053f | 2019-08-15 00:19:18 +0900 | [diff] [blame] | 469 | # Build |
| 470 | # --------------------------------------------------------------------------- |
| 471 | |
| 472 | ifdef single-build |
| 473 | |
Masahiro Yamada | 2031262 | 2019-10-16 14:15:46 +0900 | [diff] [blame] | 474 | KBUILD_SINGLE_TARGETS := $(filter $(obj)/%, $(KBUILD_SINGLE_TARGETS)) |
| 475 | |
Masahiro Yamada | 394053f | 2019-08-15 00:19:18 +0900 | [diff] [blame] | 476 | curdir-single := $(sort $(foreach x, $(KBUILD_SINGLE_TARGETS), \ |
| 477 | $(if $(filter $(x) $(basename $(x)).o, $(targets)), $(x)))) |
| 478 | |
| 479 | # Handle single targets without any rule: show "Nothing to be done for ..." or |
| 480 | # "No rule to make target ..." depending on whether the target exists. |
| 481 | unknown-single := $(filter-out $(addsuffix /%, $(subdir-ym)), \ |
Masahiro Yamada | 2031262 | 2019-10-16 14:15:46 +0900 | [diff] [blame] | 482 | $(filter-out $(curdir-single), $(KBUILD_SINGLE_TARGETS))) |
Masahiro Yamada | 394053f | 2019-08-15 00:19:18 +0900 | [diff] [blame] | 483 | |
Masahiro Yamada | 2dffd23 | 2019-10-16 14:15:47 +0900 | [diff] [blame] | 484 | single-subdirs := $(foreach d, $(subdir-ym), \ |
| 485 | $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) |
| 486 | |
| 487 | __build: $(curdir-single) $(single-subdirs) |
Masahiro Yamada | 394053f | 2019-08-15 00:19:18 +0900 | [diff] [blame] | 488 | ifneq ($(unknown-single),) |
| 489 | $(Q)$(MAKE) -f /dev/null $(unknown-single) |
| 490 | endif |
| 491 | @: |
| 492 | |
| 493 | ifeq ($(curdir-single),) |
| 494 | # Nothing to do in this directory. Do not include any .*.cmd file for speed-up |
| 495 | targets := |
| 496 | else |
| 497 | targets += $(curdir-single) |
| 498 | endif |
| 499 | |
| 500 | else |
| 501 | |
Masahiro Yamada | f3908ab | 2020-06-01 14:56:56 +0900 | [diff] [blame] | 502 | __build: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \ |
| 503 | $(if $(KBUILD_MODULES), $(targets-for-modules)) \ |
Masahiro Yamada | 5f2fb52 | 2020-02-02 01:49:24 +0900 | [diff] [blame] | 504 | $(subdir-ym) $(always-y) |
Masahiro Yamada | 394053f | 2019-08-15 00:19:18 +0900 | [diff] [blame] | 505 | @: |
| 506 | |
| 507 | endif |
| 508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | # Descending |
| 510 | # --------------------------------------------------------------------------- |
| 511 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 512 | PHONY += $(subdir-ym) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | $(subdir-ym): |
Masahiro Yamada | d9f78ed | 2019-08-06 19:03:21 +0900 | [diff] [blame] | 514 | $(Q)$(MAKE) $(build)=$@ \ |
Masahiro Yamada | 394053f | 2019-08-15 00:19:18 +0900 | [diff] [blame] | 515 | $(if $(filter $@/, $(KBUILD_SINGLE_TARGETS)),single-build=) \ |
Masahiro Yamada | aaa385b | 2020-05-22 11:00:01 +0900 | [diff] [blame] | 516 | need-builtin=$(if $(filter $@/built-in.a, $(subdir-builtin)),1) \ |
Masahiro Yamada | 454753d | 2020-05-22 11:00:02 +0900 | [diff] [blame] | 517 | need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | |
| 519 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
| 520 | # --------------------------------------------------------------------------- |
| 521 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 522 | PHONY += FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
| 524 | FORCE: |
| 525 | |
| 526 | # Read all saved command lines and dependencies for the $(targets) we |
| 527 | # may be building above, using $(if_changed{,_dep}). As an |
| 528 | # optimization, we don't need to read them if the target does not |
| 529 | # exist, we will rebuild anyway in that case. |
| 530 | |
Masahiro Yamada | 392885e | 2018-11-30 10:05:22 +0900 | [diff] [blame] | 531 | existing-targets := $(wildcard $(sort $(targets))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
Masahiro Yamada | 392885e | 2018-11-30 10:05:22 +0900 | [diff] [blame] | 533 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 534 | |
Masahiro Yamada | 8a78756 | 2017-11-13 19:29:37 +0900 | [diff] [blame] | 535 | # Create directories for object files if they do not exist |
Masahiro Yamada | cc8a51c | 2020-07-01 12:29:51 +0900 | [diff] [blame] | 536 | obj-dirs := $(sort $(patsubst %/,%, $(dir $(targets)))) |
Masahiro Yamada | 392885e | 2018-11-30 10:05:22 +0900 | [diff] [blame] | 537 | # If targets exist, their directories apparently exist. Skip mkdir. |
| 538 | existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets)))) |
| 539 | obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs))) |
Masahiro Yamada | c4da7ed | 2017-11-13 19:29:38 +0900 | [diff] [blame] | 540 | ifneq ($(obj-dirs),) |
Masahiro Yamada | 8a78756 | 2017-11-13 19:29:37 +0900 | [diff] [blame] | 541 | $(shell mkdir -p $(obj-dirs)) |
| 542 | endif |
| 543 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 544 | .PHONY: $(PHONY) |