Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | # ========================================================================== |
| 2 | # Building |
| 3 | # ========================================================================== |
| 4 | |
| 5 | src := $(obj) |
| 6 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 7 | PHONY := __build |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | __build: |
| 9 | |
Sam Ravnborg | d72e5ed | 2007-05-28 22:47:48 +0200 | [diff] [blame] | 10 | # Init all relevant variables used in kbuild files so |
| 11 | # 1) they have correct type |
| 12 | # 2) they do not inherit any value from the environment |
| 13 | obj-y := |
| 14 | obj-m := |
| 15 | lib-y := |
| 16 | lib-m := |
| 17 | always := |
| 18 | targets := |
| 19 | subdir-y := |
| 20 | subdir-m := |
| 21 | EXTRA_AFLAGS := |
| 22 | EXTRA_CFLAGS := |
| 23 | EXTRA_CPPFLAGS := |
| 24 | EXTRA_LDFLAGS := |
Sam Ravnborg | f77bf01 | 2007-10-15 22:25:06 +0200 | [diff] [blame] | 25 | asflags-y := |
| 26 | ccflags-y := |
| 27 | cppflags-y := |
| 28 | ldflags-y := |
Sam Ravnborg | d72e5ed | 2007-05-28 22:47:48 +0200 | [diff] [blame] | 29 | |
Sam Ravnborg | 720097d | 2009-04-19 11:04:26 +0200 | [diff] [blame] | 30 | subdir-asflags-y := |
| 31 | subdir-ccflags-y := |
| 32 | |
Robert P. J. Day | 3156fd0 | 2008-02-18 04:48:20 -0500 | [diff] [blame] | 33 | # Read auto.conf if it exists, otherwise ignore |
Roman Zippel | c955cca | 2006-06-08 22:12:39 -0700 | [diff] [blame] | 34 | -include include/config/auto.conf |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Sam Ravnborg | 20a468b | 2006-01-22 13:34:15 +0100 | [diff] [blame] | 36 | include scripts/Kbuild.include |
| 37 | |
Robert P. J. Day | 3156fd0 | 2008-02-18 04:48:20 -0500 | [diff] [blame] | 38 | # For backward compatibility check that these variables do not change |
Sam Ravnborg | 0c53c8e | 2007-10-14 22:26:53 +0200 | [diff] [blame] | 39 | save-cflags := $(CFLAGS) |
| 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 $(kbuild-file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Sam Ravnborg | 0c53c8e | 2007-10-14 22:26:53 +0200 | [diff] [blame] | 46 | # If the save-* variables changed error out |
| 47 | ifeq ($(KBUILD_NOPEDANTIC),) |
| 48 | ifneq ("$(save-cflags)","$(CFLAGS)") |
| 49 | $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use EXTRA_CFLAGS) |
| 50 | endif |
| 51 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | include scripts/Makefile.lib |
| 53 | |
| 54 | ifdef host-progs |
| 55 | ifneq ($(hostprogs-y),$(host-progs)) |
| 56 | $(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) |
| 57 | hostprogs-y += $(host-progs) |
| 58 | endif |
| 59 | endif |
| 60 | |
Robert P. J. Day | 3156fd0 | 2008-02-18 04:48:20 -0500 | [diff] [blame] | 61 | # Do not include host rules unless needed |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | ifneq ($(hostprogs-y)$(hostprogs-m),) |
| 63 | include scripts/Makefile.host |
| 64 | endif |
| 65 | |
| 66 | ifneq ($(KBUILD_SRC),) |
| 67 | # Create output directory if not already present |
| 68 | _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) |
| 69 | |
| 70 | # Create directories for object files if directory does not exist |
| 71 | # Needed when obj-y := dir/file.o syntax is used |
| 72 | _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) |
| 73 | endif |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | ifndef obj |
| 76 | $(warning kbuild: Makefile.build is included improperly) |
| 77 | endif |
| 78 | |
| 79 | # =========================================================================== |
| 80 | |
| 81 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),) |
| 82 | lib-target := $(obj)/lib.a |
| 83 | endif |
| 84 | |
Jiafu He | 4b02424 | 2009-12-17 18:22:13 -0700 | [diff] [blame] | 85 | ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(subdir-m) $(lib-target)),) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | builtin-target := $(obj)/built-in.o |
| 87 | endif |
| 88 | |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 89 | modorder-target := $(obj)/modules.order |
| 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | # We keep a list of all modules in $(MODVERDIR) |
| 92 | |
| 93 | __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 94 | $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | $(subdir-ym) $(always) |
| 96 | @: |
| 97 | |
| 98 | # Linus' kernel sanity checking tool |
| 99 | ifneq ($(KBUILD_CHECKSRC),0) |
| 100 | ifeq ($(KBUILD_CHECKSRC),2) |
| 101 | quiet_cmd_force_checksrc = CHECK $< |
| 102 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
| 103 | else |
| 104 | quiet_cmd_checksrc = CHECK $< |
| 105 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
| 106 | endif |
| 107 | endif |
| 108 | |
Sam Ravnborg | 91341d4 | 2008-01-21 21:31:44 +0100 | [diff] [blame] | 109 | # Do section mismatch analysis for each module/built-in.o |
| 110 | ifdef CONFIG_DEBUG_SECTION_MISMATCH |
| 111 | cmd_secanalysis = ; scripts/mod/modpost $@ |
| 112 | endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
| 114 | # Compile C sources (.c) |
| 115 | # --------------------------------------------------------------------------- |
| 116 | |
| 117 | # Default is built-in, unless we know otherwise |
Sam Ravnborg | 6588169 | 2010-07-28 17:33:09 +0200 | [diff] [blame] | 118 | modkern_cflags = \ |
| 119 | $(if $(part-of-module), \ |
| 120 | $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ |
Sam Ravnborg | 80c00ba | 2010-07-28 19:11:27 +0200 | [diff] [blame] | 121 | $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | quiet_modtag := $(empty) $(empty) |
| 123 | |
Shaohua Li | 18c167f | 2009-01-12 10:00:51 +0800 | [diff] [blame] | 124 | $(real-objs-m) : part-of-module := y |
| 125 | $(real-objs-m:.o=.i) : part-of-module := y |
| 126 | $(real-objs-m:.o=.s) : part-of-module := y |
| 127 | $(real-objs-m:.o=.lst): part-of-module := y |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
| 129 | $(real-objs-m) : quiet_modtag := [M] |
| 130 | $(real-objs-m:.o=.i) : quiet_modtag := [M] |
| 131 | $(real-objs-m:.o=.s) : quiet_modtag := [M] |
| 132 | $(real-objs-m:.o=.lst): quiet_modtag := [M] |
| 133 | |
| 134 | $(obj-m) : quiet_modtag := [M] |
| 135 | |
| 136 | # Default for not multi-part modules |
Sam Ravnborg | 5e8d780 | 2006-07-01 09:58:02 +0200 | [diff] [blame] | 137 | modname = $(basetarget) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
| 139 | $(multi-objs-m) : modname = $(modname-multi) |
| 140 | $(multi-objs-m:.o=.i) : modname = $(modname-multi) |
| 141 | $(multi-objs-m:.o=.s) : modname = $(modname-multi) |
| 142 | $(multi-objs-m:.o=.lst) : modname = $(modname-multi) |
| 143 | $(multi-objs-y) : modname = $(modname-multi) |
| 144 | $(multi-objs-y:.o=.i) : modname = $(modname-multi) |
| 145 | $(multi-objs-y:.o=.s) : modname = $(modname-multi) |
| 146 | $(multi-objs-y:.o=.lst) : modname = $(modname-multi) |
| 147 | |
| 148 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ |
Chuck Ebbert | 7d18598 | 2006-03-07 23:58:33 -0800 | [diff] [blame] | 149 | cmd_cc_s_c = $(CC) $(c_flags) -fverbose-asm -S -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 151 | $(obj)/%.s: $(src)/%.c FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | $(call if_changed_dep,cc_s_c) |
| 153 | |
| 154 | quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@ |
| 155 | cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $< |
| 156 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 157 | $(obj)/%.i: $(src)/%.c FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | $(call if_changed_dep,cc_i_c) |
| 159 | |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 160 | cmd_gensymtypes = \ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 161 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 162 | $(GENKSYMS) $(if $(1), -T $(2)) -a $(ARCH) \ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 163 | $(if $(KBUILD_PRESERVE),-p) \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 164 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 165 | |
Andreas Gruenbacher | 15fde67 | 2006-05-09 20:37:30 +0200 | [diff] [blame] | 166 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 167 | cmd_cc_symtypes_c = \ |
| 168 | set -e; \ |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 169 | $(call cmd_gensymtypes,true,$@) >/dev/null; \ |
Sam Ravnborg | 37a8d9f | 2008-12-19 21:38:09 +0100 | [diff] [blame] | 170 | test -s $@ || rm -f $@ |
Andreas Gruenbacher | 15fde67 | 2006-05-09 20:37:30 +0200 | [diff] [blame] | 171 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 172 | $(obj)/%.symtypes : $(src)/%.c FORCE |
Andreas Gruenbacher | 64e6c1e | 2008-12-01 14:21:01 -0800 | [diff] [blame] | 173 | $(call cmd,cc_symtypes_c) |
Andreas Gruenbacher | 15fde67 | 2006-05-09 20:37:30 +0200 | [diff] [blame] | 174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | # C (.c) files |
| 176 | # The C file is compiled and updated dependency information is generated. |
| 177 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) |
| 178 | |
| 179 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ |
| 180 | |
| 181 | ifndef CONFIG_MODVERSIONS |
| 182 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
| 183 | |
| 184 | else |
| 185 | # When module versioning is enabled the following steps are executed: |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 186 | # o compile a .tmp_<file>.o from <file>.c |
| 187 | # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does |
| 188 | # not export symbols, we just rename .tmp_<file>.o to <file>.o and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | # are done. |
| 190 | # o otherwise, we calculate symbol versions using the good old |
| 191 | # genksyms on the preprocessed source and postprocess them in a way |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 192 | # that they are usable as a linker script |
| 193 | # o generate <file>.o from .tmp_<file>.o using the linker to |
| 194 | # replace the unresolved symbols __crc_exported_symbol with |
| 195 | # the actual value of the checksum generated by genksyms |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 197 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< |
Don Zickus | e26d6b8 | 2010-05-24 17:07:24 -0400 | [diff] [blame] | 198 | cmd_modversions = \ |
| 199 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
| 200 | $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
| 201 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
| 202 | \ |
| 203 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ |
| 204 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
| 205 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ |
| 206 | else \ |
| 207 | mv -f $(@D)/.tmp_$(@F) $@; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | fi; |
| 209 | endif |
| 210 | |
Steven Rostedt | 8da3821 | 2008-08-14 15:45:07 -0400 | [diff] [blame] | 211 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
Andi Kleen | 66a5706 | 2009-09-18 12:49:37 -0700 | [diff] [blame] | 212 | cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
Wu Zhangjin | e6299d2 | 2009-11-20 20:34:31 +0800 | [diff] [blame] | 213 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
Steven Rostedt | b3acf29 | 2008-10-29 15:30:26 -0400 | [diff] [blame] | 214 | "$(if $(CONFIG_64BIT),64,32)" \ |
Rabin Vincent | f9810a8 | 2010-08-10 19:39:20 +0100 | [diff] [blame] | 215 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ |
| 216 | "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ |
Shaohua Li | 18c167f | 2009-01-12 10:00:51 +0800 | [diff] [blame] | 217 | "$(if $(part-of-module),1,0)" "$(@)"; |
Steven Rostedt | 8da3821 | 2008-08-14 15:45:07 -0400 | [diff] [blame] | 218 | endif |
| 219 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | define rule_cc_o_c |
Jan Beulich | 6176aa9 | 2006-01-30 10:04:27 +0100 | [diff] [blame] | 221 | $(call echo-cmd,checksrc) $(cmd_checksrc) \ |
| 222 | $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | $(cmd_modversions) \ |
Andi Kleen | c3c63b6 | 2009-09-18 12:49:36 -0700 | [diff] [blame] | 224 | $(call echo-cmd,record_mcount) \ |
Steven Rostedt | 8da3821 | 2008-08-14 15:45:07 -0400 | [diff] [blame] | 225 | $(cmd_record_mcount) \ |
Sam Ravnborg | 48f1f05 | 2006-07-23 19:37:44 +0200 | [diff] [blame] | 226 | scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ |
| 227 | $(dot-target).tmp; \ |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 228 | rm -f $(depfile); \ |
Sam Ravnborg | 48f1f05 | 2006-07-23 19:37:44 +0200 | [diff] [blame] | 229 | mv -f $(dot-target).tmp $(dot-target).cmd |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | endef |
| 231 | |
| 232 | # Built-in and composite module parts |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 233 | $(obj)/%.o: $(src)/%.c FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | $(call cmd,force_checksrc) |
| 235 | $(call if_changed_rule,cc_o_c) |
| 236 | |
| 237 | # Single-part modules are special since we need to mark them in $(MODVERDIR) |
| 238 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 239 | $(single-used-m): $(obj)/%.o: $(src)/%.c FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | $(call cmd,force_checksrc) |
| 241 | $(call if_changed_rule,cc_o_c) |
| 242 | @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod) |
| 243 | |
| 244 | quiet_cmd_cc_lst_c = MKLST $@ |
| 245 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ |
| 246 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ |
| 247 | System.map $(OBJDUMP) > $@ |
| 248 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 249 | $(obj)/%.lst: $(src)/%.c FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | $(call if_changed_dep,cc_lst_c) |
| 251 | |
| 252 | # Compile assembler sources (.S) |
| 253 | # --------------------------------------------------------------------------- |
| 254 | |
Sam Ravnborg | 80c00ba | 2010-07-28 19:11:27 +0200 | [diff] [blame] | 255 | modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
Sam Ravnborg | 6588169 | 2010-07-28 17:33:09 +0200 | [diff] [blame] | 257 | $(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
| 258 | $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
| 260 | quiet_cmd_as_s_S = CPP $(quiet_modtag) $@ |
| 261 | cmd_as_s_S = $(CPP) $(a_flags) -o $@ $< |
| 262 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 263 | $(obj)/%.s: $(src)/%.S FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | $(call if_changed_dep,as_s_S) |
| 265 | |
| 266 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ |
| 267 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
| 268 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 269 | $(obj)/%.o: $(src)/%.S FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | $(call if_changed_dep,as_o_S) |
| 271 | |
| 272 | targets += $(real-objs-y) $(real-objs-m) $(lib-y) |
| 273 | targets += $(extra-y) $(MAKECMDGOALS) $(always) |
| 274 | |
| 275 | # Linker scripts preprocessor (.lds.S -> .lds) |
| 276 | # --------------------------------------------------------------------------- |
| 277 | quiet_cmd_cpp_lds_S = LDS $@ |
Sam Ravnborg | 51b563f | 2009-09-20 12:28:22 +0200 | [diff] [blame] | 278 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ |
Tim Abbott | 42f29a2 | 2009-09-20 18:14:12 -0400 | [diff] [blame] | 279 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
Sam Ravnborg | 767e581 | 2007-05-06 09:23:45 +0200 | [diff] [blame] | 281 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | $(call if_changed_dep,cpp_lds_S) |
| 283 | |
| 284 | # Build the compiled-in targets |
| 285 | # --------------------------------------------------------------------------- |
| 286 | |
| 287 | # To build objects in subdirs, we need to descend into the directories |
| 288 | $(sort $(subdir-obj-y)): $(subdir-ym) ; |
| 289 | |
| 290 | # |
| 291 | # Rule to compile a set of .o files into one .o file |
| 292 | # |
| 293 | ifdef builtin-target |
| 294 | quiet_cmd_link_o_target = LD $@ |
| 295 | # If the list of objects to link is empty, just create an empty built-in.o |
| 296 | cmd_link_o_target = $(if $(strip $(obj-y)),\ |
Sam Ravnborg | 91341d4 | 2008-01-21 21:31:44 +0100 | [diff] [blame] | 297 | $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \ |
| 298 | $(cmd_secanalysis),\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | rm -f $@; $(AR) rcs $@) |
| 300 | |
| 301 | $(builtin-target): $(obj-y) FORCE |
| 302 | $(call if_changed,link_o_target) |
| 303 | |
| 304 | targets += $(builtin-target) |
| 305 | endif # builtin-target |
| 306 | |
| 307 | # |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 308 | # Rule to create modules.order file |
| 309 | # |
| 310 | # Create commands to either record .ko file or cat modules.order from |
| 311 | # a subdirectory |
| 312 | modorder-cmds = \ |
| 313 | $(foreach m, $(modorder), \ |
| 314 | $(if $(filter %/modules.order, $m), \ |
| 315 | cat $m;, echo kernel/$m;)) |
| 316 | |
| 317 | $(modorder-target): $(subdir-ym) FORCE |
| 318 | $(Q)(cat /dev/null; $(modorder-cmds)) > $@ |
| 319 | |
| 320 | # |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | # Rule to compile a set of .o files into one .a file |
| 322 | # |
| 323 | ifdef lib-target |
| 324 | quiet_cmd_link_l_target = AR $@ |
Sam Ravnborg | 5e54d5e | 2007-09-30 20:14:58 +0200 | [diff] [blame] | 325 | cmd_link_l_target = rm -f $@; $(AR) rcs $@ $(lib-y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
| 327 | $(lib-target): $(lib-y) FORCE |
| 328 | $(call if_changed,link_l_target) |
| 329 | |
| 330 | targets += $(lib-target) |
| 331 | endif |
| 332 | |
| 333 | # |
| 334 | # Rule to link composite objects |
| 335 | # |
| 336 | # Composite objects are specified in kbuild makefile as follows: |
| 337 | # <composite-object>-objs := <list of .o files> |
| 338 | # or |
| 339 | # <composite-object>-y := <list of .o files> |
| 340 | link_multi_deps = \ |
| 341 | $(filter $(addprefix $(obj)/, \ |
| 342 | $($(subst $(obj)/,,$(@:.o=-objs))) \ |
| 343 | $($(subst $(obj)/,,$(@:.o=-y)))), $^) |
| 344 | |
| 345 | quiet_cmd_link_multi-y = LD $@ |
Sam Ravnborg | 91341d4 | 2008-01-21 21:31:44 +0100 | [diff] [blame] | 346 | cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
| 348 | quiet_cmd_link_multi-m = LD [M] $@ |
Roland McGrath | 114f515 | 2007-07-23 01:12:08 -0700 | [diff] [blame] | 349 | cmd_link_multi-m = $(cmd_link_multi-y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
| 351 | # We would rather have a list of rules like |
| 352 | # foo.o: $(foo-objs) |
| 353 | # but that's not so easy, so we rather make all composite objects depend |
| 354 | # on the set of all their parts |
| 355 | $(multi-used-y) : %.o: $(multi-objs-y) FORCE |
| 356 | $(call if_changed,link_multi-y) |
| 357 | |
| 358 | $(multi-used-m) : %.o: $(multi-objs-m) FORCE |
| 359 | $(call if_changed,link_multi-m) |
| 360 | @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod) |
| 361 | |
| 362 | targets += $(multi-used-y) $(multi-used-m) |
| 363 | |
| 364 | |
| 365 | # Descending |
| 366 | # --------------------------------------------------------------------------- |
| 367 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 368 | PHONY += $(subdir-ym) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | $(subdir-ym): |
| 370 | $(Q)$(MAKE) $(build)=$@ |
| 371 | |
| 372 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
| 373 | # --------------------------------------------------------------------------- |
| 374 | |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 375 | PHONY += FORCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | |
| 377 | FORCE: |
| 378 | |
| 379 | # Read all saved command lines and dependencies for the $(targets) we |
| 380 | # may be building above, using $(if_changed{,_dep}). As an |
| 381 | # optimization, we don't need to read them if the target does not |
| 382 | # exist, we will rebuild anyway in that case. |
| 383 | |
| 384 | targets := $(wildcard $(sort $(targets))) |
| 385 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
| 386 | |
| 387 | ifneq ($(cmd_files),) |
| 388 | include $(cmd_files) |
| 389 | endif |
Paul Smith | 4f19336 | 2006-03-05 17:14:10 -0500 | [diff] [blame] | 390 | |
| 391 | |
| 392 | # Declare the contents of the .PHONY variable as phony. We keep that |
| 393 | # information in a variable se we can use it in if_changed and friends. |
| 394 | |
| 395 | .PHONY: $(PHONY) |