1 # SPDX-License-Identifier: GPL-2.0 <<
2 #### 1 ####
3 # kbuild: Generic definitions 2 # kbuild: Generic definitions
4 3
5 # Convenient variables 4 # Convenient variables
6 comma := , 5 comma := ,
7 quote := " 6 quote := "
8 squote := ' 7 squote := '
9 empty := 8 empty :=
10 space := $(empty) $(empty) 9 space := $(empty) $(empty)
11 space_escape := _-_SPACE_-_ 10 space_escape := _-_SPACE_-_
12 pound := \# 11 pound := \#
13 define newline <<
14 <<
15 <<
16 endef <<
17 <<
18 ### <<
19 # Comparison macros. <<
20 # Usage: $(call test-lt, $(CONFIG_LLD_VERSION) <<
21 # <<
22 # Use $(intcmp ...) if supported. (Make >= 4.4 <<
23 # Otherwise, fall back to the 'test' shell com <<
24 ifeq ($(intcmp 1,0,,,y),y) <<
25 test-ge = $(intcmp $(strip $1)0, $(strip $2)0, <<
26 test-gt = $(intcmp $(strip $1)0, $(strip $2)0, <<
27 else <<
28 test-ge = $(shell test $(strip $1)0 -ge $(stri <<
29 test-gt = $(shell test $(strip $1)0 -gt $(stri <<
30 endif <<
31 test-le = $(call test-ge, $2, $1) <<
32 test-lt = $(call test-gt, $2, $1) <<
33 12
34 ### 13 ###
35 # Name of target with a '.' as filename prefix 14 # Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
36 dot-target = $(dir $@).$(notdir $@) 15 dot-target = $(dir $@).$(notdir $@)
37 16
38 ### 17 ###
39 # Name of target with a '.tmp_' as filename pr !! 18 # The temporary file to save gcc -MD generated dependencies must not
40 tmp-target = $(dir $@).tmp_$(notdir $@) <<
41 <<
42 ### <<
43 # The temporary file to save gcc -MMD generate <<
44 # contain a comma 19 # contain a comma
45 depfile = $(subst $(comma),_,$(dot-target).d) 20 depfile = $(subst $(comma),_,$(dot-target).d)
46 21
47 ### 22 ###
48 # filename of target with directory and extens 23 # filename of target with directory and extension stripped
49 basetarget = $(basename $(notdir $@)) 24 basetarget = $(basename $(notdir $@))
50 25
51 ### 26 ###
52 # real prerequisites without phony targets <<
53 real-prereqs = $(filter-out $(PHONY), $^) <<
54 <<
55 ### <<
56 # Escape single quote for use in echo statemen 27 # Escape single quote for use in echo statements
57 escsq = $(subst $(squote),'\$(squote)',$1) 28 escsq = $(subst $(squote),'\$(squote)',$1)
58 29
59 ### 30 ###
60 # Quote a string to pass it to C files. foo => <<
61 stringify = $(squote)$(quote)$1$(quote)$(squot <<
62 <<
63 ### <<
64 # The path to Kbuild or Makefile. Kbuild has p <<
65 kbuild-file = $(or $(wildcard $(src)/Kbuild),$ <<
66 <<
67 ### <<
68 # Read a file, replacing newlines with spaces <<
69 # <<
70 # Make 4.2 or later can read a file by using i <<
71 ifneq ($(filter-out 4.0 4.1, $(MAKE_VERSION)), <<
72 read-file = $(subst $(newline),$(space),$(file <<
73 else <<
74 read-file = $(shell cat $1 2>/dev/null) <<
75 endif <<
76 <<
77 ### <<
78 # Easy method for doing a status message 31 # Easy method for doing a status message
79 kecho := : 32 kecho := :
80 quiet_kecho := echo 33 quiet_kecho := echo
81 silent_kecho := : 34 silent_kecho := :
82 kecho := $($(quiet)kecho) 35 kecho := $($(quiet)kecho)
83 36
84 ### 37 ###
85 # filechk is used to check if the content of a 38 # filechk is used to check if the content of a generated file is updated.
86 # Sample usage: 39 # Sample usage:
87 # 40 #
88 # filechk_sample = echo $(KERNELRELEASE) 41 # filechk_sample = echo $(KERNELRELEASE)
89 # version.h: FORCE 42 # version.h: FORCE
90 # $(call filechk,sample) 43 # $(call filechk,sample)
91 # 44 #
92 # The rule defined shall write to stdout the c 45 # The rule defined shall write to stdout the content of the new file.
93 # The existing file will be compared with the 46 # The existing file will be compared with the new one.
94 # - If no file exist it is created 47 # - If no file exist it is created
95 # - If the content differ the new file is used 48 # - If the content differ the new file is used
96 # - If they are equal no change, and no timest 49 # - If they are equal no change, and no timestamp update
>> 50 # - stdin is piped in from the first prerequisite ($<) so one has
>> 51 # to specify a valid file as first prerequisite (often the kbuild file)
97 define filechk 52 define filechk
98 $(check-FORCE) !! 53 $(Q)set -e; \
99 $(Q)set -e; !! 54 mkdir -p $(dir $@); \
100 mkdir -p $(dir $@); !! 55 { $(filechk_$(1)); } > $@.tmp; \
101 trap "rm -f $(tmp-target)" EXIT; !! 56 if [ -r $@ ] && cmp -s $@ $@.tmp; then \
102 { $(filechk_$(1)); } > $(tmp-target); !! 57 rm -f $@.tmp; \
103 if [ ! -r $@ ] || ! cmp -s $@ $(tmp-ta !! 58 else \
104 $(kecho) ' UPD $@'; !! 59 $(kecho) ' UPD $@'; \
105 mv -f $(tmp-target) $@; !! 60 mv -f $@.tmp $@; \
106 fi 61 fi
107 endef 62 endef
108 63
>> 64 ######
>> 65 # gcc support functions
>> 66 # See documentation in Documentation/kbuild/makefiles.txt
>> 67
>> 68 # cc-cross-prefix
>> 69 # Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-)
>> 70 # Return first prefix where a prefix$(CC) is found in PATH.
>> 71 # If no $(CC) found in PATH with listed prefixes return nothing
>> 72 cc-cross-prefix = \
>> 73 $(word 1, $(foreach c,$(1), \
>> 74 $(shell set -e; \
>> 75 if (which $(strip $(c))$(CC)) > /dev/null 2>&1 ; then \
>> 76 echo $(c); \
>> 77 fi)))
>> 78
>> 79 # output directory for tests below
>> 80 TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/)
>> 81
>> 82 # try-run
>> 83 # Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
>> 84 # Exit code chooses option. "$$TMP" serves as a temporary file and is
>> 85 # automatically cleaned up.
>> 86 try-run = $(shell set -e; \
>> 87 TMP="$(TMPOUT).$$$$.tmp"; \
>> 88 TMPO="$(TMPOUT).$$$$.o"; \
>> 89 if ($(1)) >/dev/null 2>&1; \
>> 90 then echo "$(2)"; \
>> 91 else echo "$(3)"; \
>> 92 fi; \
>> 93 rm -f "$$TMP" "$$TMPO")
>> 94
>> 95 # as-option
>> 96 # Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,)
>> 97
>> 98 as-option = $(call try-run,\
>> 99 $(CC) $(KBUILD_CFLAGS) $(1) -c -x assembler /dev/null -o "$$TMP",$(1),$(2))
>> 100
>> 101 # as-instr
>> 102 # Usage: cflags-y += $(call as-instr,instr,option1,option2)
>> 103
>> 104 as-instr = $(call try-run,\
>> 105 printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
>> 106
>> 107 # __cc-option
>> 108 # Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586)
>> 109 __cc-option = $(call try-run,\
>> 110 $(1) -Werror $(2) $(3) -c -x c /dev/null -o "$$TMP",$(3),$(4))
>> 111
>> 112 # Do not attempt to build with gcc plugins during cc-option tests.
>> 113 # (And this uses delayed resolution so the flags will be up to date.)
>> 114 CC_OPTION_CFLAGS = $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS))
>> 115
>> 116 # cc-option
>> 117 # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
>> 118
>> 119 cc-option = $(call __cc-option, $(CC),\
>> 120 $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS),$(1),$(2))
>> 121
>> 122 # hostcc-option
>> 123 # Usage: cflags-y += $(call hostcc-option,-march=winchip-c6,-march=i586)
>> 124 hostcc-option = $(call __cc-option, $(HOSTCC),\
>> 125 $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS),$(1),$(2))
>> 126
>> 127 # cc-option-yn
>> 128 # Usage: flag := $(call cc-option-yn,-march=winchip-c6)
>> 129 cc-option-yn = $(call try-run,\
>> 130 $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n)
>> 131
>> 132 # cc-disable-warning
>> 133 # Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
>> 134 cc-disable-warning = $(call try-run,\
>> 135 $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
>> 136
>> 137 # cc-version
>> 138 cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC))
>> 139
>> 140 # cc-ifversion
>> 141 # Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
>> 142 cc-ifversion = $(shell [ $(cc-version) $(1) $(2) ] && echo $(3) || echo $(4))
>> 143
>> 144 # cc-ldoption
>> 145 # Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both)
>> 146 cc-ldoption = $(call try-run,\
>> 147 $(CC) $(1) $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
>> 148
>> 149 # ld-option
>> 150 # Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y)
>> 151 ld-option = $(call try-run, $(LD) $(KBUILD_LDFLAGS) $(1) -v,$(1),$(2),$(3))
>> 152
>> 153 # ar-option
>> 154 # Usage: KBUILD_ARFLAGS := $(call ar-option,D)
>> 155 # Important: no spaces around options
>> 156 ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2))
>> 157
>> 158 # ld-version
>> 159 # Note this is mainly for HJ Lu's 3 number binutil versions
>> 160 ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh)
>> 161
>> 162 # ld-ifversion
>> 163 # Usage: $(call ld-ifversion, -ge, 22252, y)
>> 164 ld-ifversion = $(shell [ $(ld-version) $(1) $(2) ] && echo $(3) || echo $(4))
>> 165
>> 166 ######
>> 167
109 ### 168 ###
110 # Shorthand for $(Q)$(MAKE) -f scripts/Makefil 169 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
111 # Usage: 170 # Usage:
112 # $(Q)$(MAKE) $(build)=dir 171 # $(Q)$(MAKE) $(build)=dir
113 build := -f $(srctree)/scripts/Makefile.build 172 build := -f $(srctree)/scripts/Makefile.build obj
114 173
115 ### 174 ###
>> 175 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.modbuiltin obj=
>> 176 # Usage:
>> 177 # $(Q)$(MAKE) $(modbuiltin)=dir
>> 178 modbuiltin := -f $(srctree)/scripts/Makefile.modbuiltin obj
>> 179
>> 180 ###
>> 181 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj=
>> 182 # Usage:
>> 183 # $(Q)$(MAKE) $(dtbinst)=dir
>> 184 dtbinst := -f $(srctree)/scripts/Makefile.dtbinst obj
>> 185
>> 186 ###
116 # Shorthand for $(Q)$(MAKE) -f scripts/Makefil 187 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=
117 # Usage: 188 # Usage:
118 # $(Q)$(MAKE) $(clean)=dir 189 # $(Q)$(MAKE) $(clean)=dir
119 clean := -f $(srctree)/scripts/Makefile.clean 190 clean := -f $(srctree)/scripts/Makefile.clean obj
120 191
121 # pring log !! 192 ###
122 # !! 193 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.headersinst obj=
123 # If quiet is "silent_", print nothing and sin !! 194 # Usage:
124 # If quiet is "quiet_", print short log !! 195 # $(Q)$(MAKE) $(hdr-inst)=dir
125 # If quiet is empty, print short log and whole !! 196 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
126 silent_log_print = exec >/dev/null; !! 197
127 quiet_log_print = $(if $(quiet_cmd_$1), echo !! 198 # Prefix -I with $(srctree) if it is not an absolute path.
128 log_print = echo '$(pound) $(call escsq !! 199 # skip if -I has no parameter
129 echo ' $(call escsq,$(cmd_ !! 200 addtree = $(if $(patsubst -I%,%,$(1)), \
130 !! 201 $(if $(filter-out -I/% -I./% -I../%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1)),$(1)),$(1))
131 # Delete the target on interruption !! 202
132 # !! 203 # Find all -I options and call addtree
133 # GNU Make automatically deletes the target if !! 204 flags = $(foreach o,$($(1)),$(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o)))
134 # the interrupted recipe. So, you can safely s !! 205
135 # will delete incomplete targets), and resume !! 206 # echo command.
136 # !! 207 # Short version is used, if $(quiet) equals `quiet_', otherwise full one.
137 # However, this does not work when the stderr !! 208 echo-cmd = $(if $($(quiet)cmd_$(1)),\
138 # $ make >&2 | tee log !! 209 echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';)
139 # Make dies with SIGPIPE before cleaning the t <<
140 # <<
141 # To address it, we clean the target in signal <<
142 # <<
143 # Make deletes the target when it catches SIGH <<
144 # So, we cover them, and also SIGPIPE just in <<
145 # <<
146 # Of course, this is unneeded for phony target <<
147 delete-on-interrupt = \ <<
148 $(if $(filter-out $(PHONY), $@), \ <<
149 $(foreach sig, HUP INT QUIT TE <<
150 trap 'rm -f $@; trap - <<
151 210
152 # print and execute commands !! 211 # printing commands
153 cmd = @$(if $(cmd_$(1)),set -e; $($(quiet)log_ !! 212 cmd = @set -e; $(echo-cmd) $(cmd_$(1))
>> 213
>> 214 # Add $(obj)/ for paths that are not absolute
>> 215 objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
154 216
155 ### 217 ###
156 # if_changed - execute command if any pre 218 # if_changed - execute command if any prerequisite is newer than
157 # target, or command line ha 219 # target, or command line has changed
158 # if_changed_dep - as if_changed, but uses fi 220 # if_changed_dep - as if_changed, but uses fixdep to reveal dependencies
159 # including used config symb 221 # including used config symbols
160 # if_changed_rule - as if_changed but execute 222 # if_changed_rule - as if_changed but execute rule instead
161 # See Documentation/kbuild/makefiles.rst for m !! 223 # See Documentation/kbuild/makefiles.txt for more info
162 224
163 ifneq ($(KBUILD_NOCMDDEP),1) 225 ifneq ($(KBUILD_NOCMDDEP),1)
164 # Check if both commands are the same includin !! 226 # Check if both arguments are the same including their order. Result is empty
165 # string if equal. User may override this chec 227 # string if equal. User may override this check using make KBUILD_NOCMDDEP=1
166 # If the target does not exist, the *.cmd file !! 228 arg-check = $(filter-out $(subst $(space),$(space_escape),$(strip $(cmd_$@))), \
167 # $(savedcmd_$@) gets empty. Then, target will <<
168 # happens to become empty. <<
169 cmd-check = $(filter-out $(subst $(space),$(sp <<
170 $(subst $(space),$(sp 229 $(subst $(space),$(space_escape),$(strip $(cmd_$1))))
171 else 230 else
172 # We still need to detect missing targets. !! 231 arg-check = $(if $(strip $(cmd_$@)),,1)
173 cmd-check = $(if $(strip $(savedcmd_$@)),,1) <<
174 endif 232 endif
175 233
176 # Replace >$< with >$$< to preserve $ when rel 234 # Replace >$< with >$$< to preserve $ when reloading the .cmd file
177 # (needed for make) 235 # (needed for make)
178 # Replace >#< with >$(pound)< to avoid startin 236 # Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file
179 # (needed for make) 237 # (needed for make)
180 # Replace >'< with >'\''< to be able to enclos 238 # Replace >'< with >'\''< to be able to enclose the whole string in '...'
181 # (needed for the shell) 239 # (needed for the shell)
182 make-cmd = $(call escsq,$(subst $(pound),$$(po 240 make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1)))))
183 241
184 # Find any prerequisites that are newer than t !! 242 # Find any prerequisites that is newer than target or that does not exist.
185 # PHONY targets skipped in both cases. 243 # PHONY targets skipped in both cases.
186 # If there is no prerequisite other than phony !! 244 any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
187 # empty even if the target does not exist. cmd <<
188 newer-prereqs = $(filter-out $(PHONY),$?) <<
189 <<
190 # It is a typical mistake to forget the FORCE <<
191 # no more breakage will slip in. <<
192 check-FORCE = $(if $(filter FORCE, $^),,$(warn <<
193 <<
194 if-changed-cond = $(newer-prereqs)$(cmd-check) <<
195 245
196 # Execute command if command has changed or pr 246 # Execute command if command has changed or prerequisite(s) are updated.
197 if_changed = $(if $(if-changed-cond),$(cmd_and !! 247 if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
198 <<
199 cmd_and_savecmd = <<
200 $(cmd); 248 $(cmd); \
201 printf '%s\n' 'savedcmd_$@ := $(make-c !! 249 printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
202 250
203 # Execute the command and also postprocess gen 251 # Execute the command and also postprocess generated .d dependencies file.
204 if_changed_dep = $(if $(if-changed-cond),$(cmd !! 252 if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)),$(cmd_and_fixdep),@:)
205 253
206 cmd_and_fixdep = 254 cmd_and_fixdep = \
207 $(cmd); 255 $(cmd); \
208 scripts/basic/fixdep $(depfile) $@ '$( 256 scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).cmd;\
209 rm -f $(depfile) 257 rm -f $(depfile)
210 258
211 # Usage: $(call if_changed_rule,foo) 259 # Usage: $(call if_changed_rule,foo)
212 # Will check if $(cmd_foo) or any of the prere 260 # Will check if $(cmd_foo) or any of the prerequisites changed,
213 # and if so will execute $(rule_foo). 261 # and if so will execute $(rule_foo).
214 if_changed_rule = $(if $(if-changed-cond),$(ru !! 262 if_changed_rule = $(if $(strip $(any-prereq) $(arg-check)),$(rule_$(1)),@:)
215 263
216 ### 264 ###
217 # why - tell why a target got built 265 # why - tell why a target got built
218 # enabled by make V=2 266 # enabled by make V=2
219 # Output (listed in the order they are c 267 # Output (listed in the order they are checked):
220 # (1) - due to target is PHONY 268 # (1) - due to target is PHONY
221 # (2) - due to target missing 269 # (2) - due to target missing
222 # (3) - due to: file1.h file2.h 270 # (3) - due to: file1.h file2.h
223 # (4) - due to command line change 271 # (4) - due to command line change
224 # (5) - due to missing .cmd file 272 # (5) - due to missing .cmd file
225 # (6) - due to target not in $(target 273 # (6) - due to target not in $(targets)
226 # (1) PHONY targets are always build 274 # (1) PHONY targets are always build
227 # (2) No target, so we better build it 275 # (2) No target, so we better build it
228 # (3) Prerequisite is newer than target 276 # (3) Prerequisite is newer than target
229 # (4) The command line stored in the file name 277 # (4) The command line stored in the file named dir/.target.cmd
230 # differed from actual command line. This 278 # differed from actual command line. This happens when compiler
231 # options changes 279 # options changes
232 # (5) No dir/.target.cmd file (used to store c 280 # (5) No dir/.target.cmd file (used to store command line)
233 # (6) No dir/.target.cmd file and target not l 281 # (6) No dir/.target.cmd file and target not listed in $(targets)
234 # This is a good hint that there is a bug 282 # This is a good hint that there is a bug in the kbuild file
235 ifneq ($(findstring 2, $(KBUILD_VERBOSE)),) !! 283 ifeq ($(KBUILD_VERBOSE),2)
236 _why = !! 284 why = \
237 $(if $(filter $@, $(PHONY)),- due to targe 285 $(if $(filter $@, $(PHONY)),- due to target is PHONY, \
238 $(if $(wildcard $@), 286 $(if $(wildcard $@), \
239 $(if $(newer-prereqs),- due to: $( !! 287 $(if $(strip $(any-prereq)),- due to: $(any-prereq), \
240 $(if $(cmd-check), !! 288 $(if $(arg-check), \
241 $(if $(savedcmd_$@),- due !! 289 $(if $(cmd_$@),- due to command line change, \
242 $(if $(filter $@, $(ta 290 $(if $(filter $@, $(targets)), \
243 - due to missing . 291 - due to missing .cmd file, \
244 - due to $(notdir 292 - due to $(notdir $@) not in $$(targets) \
245 ) 293 ) \
246 ) 294 ) \
247 ) 295 ) \
248 ), 296 ), \
249 - due to target missing 297 - due to target missing \
250 ) 298 ) \
251 ) 299 )
252 300
253 why = $(space)$(strip $(_why)) !! 301 echo-why = $(call escsq, $(strip $(why)))
254 endif 302 endif
255 303
256 ############################################## 304 ###############################################################################
>> 305 #
>> 306 # When a Kconfig string contains a filename, it is suitable for
>> 307 # passing to shell commands. It is surrounded by double-quotes, and
>> 308 # any double-quotes or backslashes within it are escaped by
>> 309 # backslashes.
>> 310 #
>> 311 # This is no use for dependencies or $(wildcard). We need to strip the
>> 312 # surrounding quotes and the escaping from quotes and backslashes, and
>> 313 # we *do* need to escape any spaces in the string. So, for example:
>> 314 #
>> 315 # Usage: $(eval $(call config_filename,FOO))
>> 316 #
>> 317 # Defines FOO_FILENAME based on the contents of the CONFIG_FOO option,
>> 318 # transformed as described above to be suitable for use within the
>> 319 # makefile.
>> 320 #
>> 321 # Also, if the filename is a relative filename and exists in the source
>> 322 # tree but not the build tree, define FOO_SRCPREFIX as $(srctree)/ to
>> 323 # be prefixed to *both* command invocation and dependencies.
>> 324 #
>> 325 # Note: We also print the filenames in the quiet_cmd_foo text, and
>> 326 # perhaps ought to have a version specially escaped for that purpose.
>> 327 # But it's only cosmetic, and $(patsubst "%",%,$(CONFIG_FOO)) is good
>> 328 # enough. It'll strip the quotes in the common case where there's no
>> 329 # space and it's a simple filename, and it'll retain the quotes when
>> 330 # there's a space. There are some esoteric cases in which it'll print
>> 331 # the wrong thing, but we don't really care. The actual dependencies
>> 332 # and commands *do* get it right, with various combinations of single
>> 333 # and double quotes, backslashes and spaces in the filenames.
>> 334 #
>> 335 ###############################################################################
>> 336 #
>> 337 define config_filename
>> 338 ifneq ($$(CONFIG_$(1)),"")
>> 339 $(1)_FILENAME := $$(subst \\,\,$$(subst \$$(quote),$$(quote),$$(subst $$(space_escape),\$$(space),$$(patsubst "%",%,$$(subst $$(space),$$(space_escape),$$(CONFIG_$(1)))))))
>> 340 ifneq ($$(patsubst /%,%,$$(firstword $$($(1)_FILENAME))),$$(firstword $$($(1)_FILENAME)))
>> 341 else
>> 342 ifeq ($$(wildcard $$($(1)_FILENAME)),)
>> 343 ifneq ($$(wildcard $$(srctree)/$$($(1)_FILENAME)),)
>> 344 $(1)_SRCPREFIX := $(srctree)/
>> 345 endif
>> 346 endif
>> 347 endif
>> 348 endif
>> 349 endef
>> 350 #
>> 351 ###############################################################################
257 352
258 # delete partially updated (i.e. corrupted) fi 353 # delete partially updated (i.e. corrupted) files on error
259 .DELETE_ON_ERROR: 354 .DELETE_ON_ERROR:
260 355
261 # do not delete intermediate files automatical 356 # do not delete intermediate files automatically
262 # <<
263 # .NOTINTERMEDIATE is more correct, but only a <<
264 # Make 4.4 introduced .NOTINTERMEDIATE, and it <<
265 # global .NOTINTERMEDIATE does not work. We ca <<
266 # Use .SECONDARY for older Make versions, but <<
267 # deleted files. <<
268 ifneq ($(and $(filter notintermediate, $(.FEAT <<
269 .NOTINTERMEDIATE: <<
270 else <<
271 .SECONDARY: 357 .SECONDARY:
272 endif <<
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