1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 #### 2 ####
3 # kbuild: Generic definitions 3 # kbuild: Generic definitions
4 4
5 # Convenient variables 5 # Convenient variables
6 comma := , 6 comma := ,
7 quote := " 7 quote := "
8 squote := ' 8 squote := '
9 empty := 9 empty :=
10 space := $(empty) $(empty) 10 space := $(empty) $(empty)
11 space_escape := _-_SPACE_-_ 11 space_escape := _-_SPACE_-_
12 pound := \# 12 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 13
34 ### 14 ###
35 # Name of target with a '.' as filename prefix 15 # Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
36 dot-target = $(dir $@).$(notdir $@) 16 dot-target = $(dir $@).$(notdir $@)
37 17
38 ### 18 ###
39 # Name of target with a '.tmp_' as filename pr !! 19 # 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 20 # contain a comma
45 depfile = $(subst $(comma),_,$(dot-target).d) 21 depfile = $(subst $(comma),_,$(dot-target).d)
46 22
47 ### 23 ###
48 # filename of target with directory and extens 24 # filename of target with directory and extension stripped
49 basetarget = $(basename $(notdir $@)) 25 basetarget = $(basename $(notdir $@))
50 26
51 ### 27 ###
52 # real prerequisites without phony targets 28 # real prerequisites without phony targets
53 real-prereqs = $(filter-out $(PHONY), $^) 29 real-prereqs = $(filter-out $(PHONY), $^)
54 30
55 ### 31 ###
56 # Escape single quote for use in echo statemen 32 # Escape single quote for use in echo statements
57 escsq = $(subst $(squote),'\$(squote)',$1) 33 escsq = $(subst $(squote),'\$(squote)',$1)
58 34
59 ### 35 ###
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 36 # Easy method for doing a status message
79 kecho := : 37 kecho := :
80 quiet_kecho := echo 38 quiet_kecho := echo
81 silent_kecho := : 39 silent_kecho := :
82 kecho := $($(quiet)kecho) 40 kecho := $($(quiet)kecho)
83 41
84 ### 42 ###
85 # filechk is used to check if the content of a 43 # filechk is used to check if the content of a generated file is updated.
86 # Sample usage: 44 # Sample usage:
87 # 45 #
88 # filechk_sample = echo $(KERNELRELEASE) 46 # filechk_sample = echo $(KERNELRELEASE)
89 # version.h: FORCE 47 # version.h: FORCE
90 # $(call filechk,sample) 48 # $(call filechk,sample)
91 # 49 #
92 # The rule defined shall write to stdout the c 50 # The rule defined shall write to stdout the content of the new file.
93 # The existing file will be compared with the 51 # The existing file will be compared with the new one.
94 # - If no file exist it is created 52 # - If no file exist it is created
95 # - If the content differ the new file is used 53 # - If the content differ the new file is used
96 # - If they are equal no change, and no timest 54 # - If they are equal no change, and no timestamp update
>> 55 # - stdin is piped in from the first prerequisite ($<) so one has
>> 56 # to specify a valid file as first prerequisite (often the kbuild file)
97 define filechk 57 define filechk
98 $(check-FORCE) !! 58 $(Q)set -e; \
99 $(Q)set -e; !! 59 mkdir -p $(dir $@); \
100 mkdir -p $(dir $@); !! 60 { $(filechk_$(1)); } > $@.tmp; \
101 trap "rm -f $(tmp-target)" EXIT; !! 61 if [ -r $@ ] && cmp -s $@ $@.tmp; then \
102 { $(filechk_$(1)); } > $(tmp-target); !! 62 rm -f $@.tmp; \
103 if [ ! -r $@ ] || ! cmp -s $@ $(tmp-ta !! 63 else \
104 $(kecho) ' UPD $@'; !! 64 $(kecho) ' UPD $@'; \
105 mv -f $(tmp-target) $@; !! 65 mv -f $@.tmp $@; \
106 fi 66 fi
107 endef 67 endef
108 68
>> 69 ######
>> 70 # gcc support functions
>> 71 # See documentation in Documentation/kbuild/makefiles.txt
>> 72
>> 73 # cc-cross-prefix
>> 74 # Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-)
>> 75 # Return first <prefix> where a <prefix>gcc is found in PATH.
>> 76 # If no gcc found in PATH with listed prefixes return nothing
>> 77 #
>> 78 # Note: '2>/dev/null' is here to force Make to invoke a shell. Otherwise, it
>> 79 # would try to directly execute the shell builtin 'command'. This workaround
>> 80 # should be kept for a long time since this issue was fixed only after the
>> 81 # GNU Make 4.2.1 release.
>> 82 cc-cross-prefix = $(firstword $(foreach c, $(filter-out -%, $(1)), \
>> 83 $(if $(shell command -v $(c)gcc 2>/dev/null), $(c))))
>> 84
>> 85 # output directory for tests below
>> 86 TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/)
>> 87
>> 88 # try-run
>> 89 # Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
>> 90 # Exit code chooses option. "$$TMP" serves as a temporary file and is
>> 91 # automatically cleaned up.
>> 92 try-run = $(shell set -e; \
>> 93 TMP="$(TMPOUT).$$$$.tmp"; \
>> 94 TMPO="$(TMPOUT).$$$$.o"; \
>> 95 if ($(1)) >/dev/null 2>&1; \
>> 96 then echo "$(2)"; \
>> 97 else echo "$(3)"; \
>> 98 fi; \
>> 99 rm -f "$$TMP" "$$TMPO")
>> 100
>> 101 # as-option
>> 102 # Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,)
>> 103
>> 104 as-option = $(call try-run,\
>> 105 $(CC) $(KBUILD_CFLAGS) $(1) -c -x assembler /dev/null -o "$$TMP",$(1),$(2))
>> 106
>> 107 # as-instr
>> 108 # Usage: cflags-y += $(call as-instr,instr,option1,option2)
>> 109
>> 110 as-instr = $(call try-run,\
>> 111 printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
>> 112
>> 113 # __cc-option
>> 114 # Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586)
>> 115 __cc-option = $(call try-run,\
>> 116 $(1) -Werror $(2) $(3) -c -x c /dev/null -o "$$TMP",$(3),$(4))
>> 117
>> 118 # Do not attempt to build with gcc plugins during cc-option tests.
>> 119 # (And this uses delayed resolution so the flags will be up to date.)
>> 120 CC_OPTION_CFLAGS = $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS))
>> 121
>> 122 # cc-option
>> 123 # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
>> 124
>> 125 cc-option = $(call __cc-option, $(CC),\
>> 126 $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS),$(1),$(2))
>> 127
>> 128 # hostcc-option
>> 129 # Usage: cflags-y += $(call hostcc-option,-march=winchip-c6,-march=i586)
>> 130 hostcc-option = $(call __cc-option, $(HOSTCC),\
>> 131 $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS),$(1),$(2))
>> 132
>> 133 # cc-option-yn
>> 134 # Usage: flag := $(call cc-option-yn,-march=winchip-c6)
>> 135 cc-option-yn = $(call try-run,\
>> 136 $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n)
>> 137
>> 138 # cc-disable-warning
>> 139 # Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
>> 140 cc-disable-warning = $(call try-run,\
>> 141 $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
>> 142
>> 143 # cc-ifversion
>> 144 # Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
>> 145 cc-ifversion = $(shell [ $(CONFIG_GCC_VERSION)0 $(1) $(2)000 ] && echo $(3) || echo $(4))
>> 146
>> 147 # ld-option
>> 148 # Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y)
>> 149 ld-option = $(call try-run, $(LD) $(KBUILD_LDFLAGS) $(1) -v,$(1),$(2),$(3))
>> 150
>> 151 # ar-option
>> 152 # Usage: KBUILD_ARFLAGS := $(call ar-option,D)
>> 153 # Important: no spaces around options
>> 154 ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2))
>> 155
>> 156 # ld-version
>> 157 # Note this is mainly for HJ Lu's 3 number binutil versions
>> 158 ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh)
>> 159
>> 160 # ld-ifversion
>> 161 # Usage: $(call ld-ifversion, -ge, 22252, y)
>> 162 ld-ifversion = $(shell [ $(ld-version) $(1) $(2) ] && echo $(3) || echo $(4))
>> 163
>> 164 ######
>> 165
109 ### 166 ###
110 # Shorthand for $(Q)$(MAKE) -f scripts/Makefil 167 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
111 # Usage: 168 # Usage:
112 # $(Q)$(MAKE) $(build)=dir 169 # $(Q)$(MAKE) $(build)=dir
113 build := -f $(srctree)/scripts/Makefile.build 170 build := -f $(srctree)/scripts/Makefile.build obj
114 171
115 ### 172 ###
>> 173 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.modbuiltin obj=
>> 174 # Usage:
>> 175 # $(Q)$(MAKE) $(modbuiltin)=dir
>> 176 modbuiltin := -f $(srctree)/scripts/Makefile.modbuiltin obj
>> 177
>> 178 ###
>> 179 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj=
>> 180 # Usage:
>> 181 # $(Q)$(MAKE) $(dtbinst)=dir
>> 182 dtbinst := -f $(srctree)/scripts/Makefile.dtbinst obj
>> 183
>> 184 ###
116 # Shorthand for $(Q)$(MAKE) -f scripts/Makefil 185 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=
117 # Usage: 186 # Usage:
118 # $(Q)$(MAKE) $(clean)=dir 187 # $(Q)$(MAKE) $(clean)=dir
119 clean := -f $(srctree)/scripts/Makefile.clean 188 clean := -f $(srctree)/scripts/Makefile.clean obj
120 189
121 # pring log !! 190 ###
122 # !! 191 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.headersinst obj=
123 # If quiet is "silent_", print nothing and sin !! 192 # Usage:
124 # If quiet is "quiet_", print short log !! 193 # $(Q)$(MAKE) $(hdr-inst)=dir
125 # If quiet is empty, print short log and whole !! 194 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
126 silent_log_print = exec >/dev/null; !! 195
127 quiet_log_print = $(if $(quiet_cmd_$1), echo !! 196 # echo command.
128 log_print = echo '$(pound) $(call escsq !! 197 # Short version is used, if $(quiet) equals `quiet_', otherwise full one.
129 echo ' $(call escsq,$(cmd_ !! 198 echo-cmd = $(if $($(quiet)cmd_$(1)),\
130 !! 199 echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';)
131 # Delete the target on interruption <<
132 # <<
133 # GNU Make automatically deletes the target if <<
134 # the interrupted recipe. So, you can safely s <<
135 # will delete incomplete targets), and resume <<
136 # <<
137 # However, this does not work when the stderr <<
138 # $ make >&2 | tee log <<
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 - <<
151 200
152 # print and execute commands !! 201 # printing commands
153 cmd = @$(if $(cmd_$(1)),set -e; $($(quiet)log_ !! 202 cmd = @set -e; $(echo-cmd) $(cmd_$(1))
>> 203
>> 204 # Add $(obj)/ for paths that are not absolute
>> 205 objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
154 206
155 ### 207 ###
156 # if_changed - execute command if any pre 208 # if_changed - execute command if any prerequisite is newer than
157 # target, or command line ha 209 # target, or command line has changed
158 # if_changed_dep - as if_changed, but uses fi 210 # if_changed_dep - as if_changed, but uses fixdep to reveal dependencies
159 # including used config symb 211 # including used config symbols
160 # if_changed_rule - as if_changed but execute 212 # if_changed_rule - as if_changed but execute rule instead
161 # See Documentation/kbuild/makefiles.rst for m !! 213 # See Documentation/kbuild/makefiles.txt for more info
162 214
163 ifneq ($(KBUILD_NOCMDDEP),1) 215 ifneq ($(KBUILD_NOCMDDEP),1)
164 # Check if both commands are the same includin !! 216 # Check if both arguments are the same including their order. Result is empty
165 # string if equal. User may override this chec 217 # string if equal. User may override this check using make KBUILD_NOCMDDEP=1
166 # If the target does not exist, the *.cmd file !! 218 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 219 $(subst $(space),$(space_escape),$(strip $(cmd_$1))))
171 else 220 else
172 # We still need to detect missing targets. !! 221 arg-check = $(if $(strip $(cmd_$@)),,1)
173 cmd-check = $(if $(strip $(savedcmd_$@)),,1) <<
174 endif 222 endif
175 223
176 # Replace >$< with >$$< to preserve $ when rel 224 # Replace >$< with >$$< to preserve $ when reloading the .cmd file
177 # (needed for make) 225 # (needed for make)
178 # Replace >#< with >$(pound)< to avoid startin 226 # Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file
179 # (needed for make) 227 # (needed for make)
180 # Replace >'< with >'\''< to be able to enclos 228 # Replace >'< with >'\''< to be able to enclose the whole string in '...'
181 # (needed for the shell) 229 # (needed for the shell)
182 make-cmd = $(call escsq,$(subst $(pound),$$(po 230 make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1)))))
183 231
184 # Find any prerequisites that are newer than t !! 232 # Find any prerequisites that is newer than target or that does not exist.
185 # PHONY targets skipped in both cases. 233 # PHONY targets skipped in both cases.
186 # If there is no prerequisite other than phony !! 234 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) <<
195 235
196 # Execute command if command has changed or pr 236 # Execute command if command has changed or prerequisite(s) are updated.
197 if_changed = $(if $(if-changed-cond),$(cmd_and !! 237 if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
198 <<
199 cmd_and_savecmd = <<
200 $(cmd); 238 $(cmd); \
201 printf '%s\n' 'savedcmd_$@ := $(make-c !! 239 printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
202 240
203 # Execute the command and also postprocess gen 241 # Execute the command and also postprocess generated .d dependencies file.
204 if_changed_dep = $(if $(if-changed-cond),$(cmd !! 242 if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)),$(cmd_and_fixdep),@:)
205 243
206 cmd_and_fixdep = 244 cmd_and_fixdep = \
207 $(cmd); 245 $(cmd); \
208 scripts/basic/fixdep $(depfile) $@ '$( 246 scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).cmd;\
209 rm -f $(depfile) 247 rm -f $(depfile)
210 248
211 # Usage: $(call if_changed_rule,foo) 249 # Usage: $(call if_changed_rule,foo)
212 # Will check if $(cmd_foo) or any of the prere 250 # Will check if $(cmd_foo) or any of the prerequisites changed,
213 # and if so will execute $(rule_foo). 251 # and if so will execute $(rule_foo).
214 if_changed_rule = $(if $(if-changed-cond),$(ru !! 252 if_changed_rule = $(if $(strip $(any-prereq) $(arg-check)),$(rule_$(1)),@:)
215 253
216 ### 254 ###
217 # why - tell why a target got built 255 # why - tell why a target got built
218 # enabled by make V=2 256 # enabled by make V=2
219 # Output (listed in the order they are c 257 # Output (listed in the order they are checked):
220 # (1) - due to target is PHONY 258 # (1) - due to target is PHONY
221 # (2) - due to target missing 259 # (2) - due to target missing
222 # (3) - due to: file1.h file2.h 260 # (3) - due to: file1.h file2.h
223 # (4) - due to command line change 261 # (4) - due to command line change
224 # (5) - due to missing .cmd file 262 # (5) - due to missing .cmd file
225 # (6) - due to target not in $(target 263 # (6) - due to target not in $(targets)
226 # (1) PHONY targets are always build 264 # (1) PHONY targets are always build
227 # (2) No target, so we better build it 265 # (2) No target, so we better build it
228 # (3) Prerequisite is newer than target 266 # (3) Prerequisite is newer than target
229 # (4) The command line stored in the file name 267 # (4) The command line stored in the file named dir/.target.cmd
230 # differed from actual command line. This 268 # differed from actual command line. This happens when compiler
231 # options changes 269 # options changes
232 # (5) No dir/.target.cmd file (used to store c 270 # (5) No dir/.target.cmd file (used to store command line)
233 # (6) No dir/.target.cmd file and target not l 271 # (6) No dir/.target.cmd file and target not listed in $(targets)
234 # This is a good hint that there is a bug 272 # This is a good hint that there is a bug in the kbuild file
235 ifneq ($(findstring 2, $(KBUILD_VERBOSE)),) !! 273 ifeq ($(KBUILD_VERBOSE),2)
236 _why = !! 274 why = \
237 $(if $(filter $@, $(PHONY)),- due to targe 275 $(if $(filter $@, $(PHONY)),- due to target is PHONY, \
238 $(if $(wildcard $@), 276 $(if $(wildcard $@), \
239 $(if $(newer-prereqs),- due to: $( !! 277 $(if $(strip $(any-prereq)),- due to: $(any-prereq), \
240 $(if $(cmd-check), !! 278 $(if $(arg-check), \
241 $(if $(savedcmd_$@),- due !! 279 $(if $(cmd_$@),- due to command line change, \
242 $(if $(filter $@, $(ta 280 $(if $(filter $@, $(targets)), \
243 - due to missing . 281 - due to missing .cmd file, \
244 - due to $(notdir 282 - due to $(notdir $@) not in $$(targets) \
245 ) 283 ) \
246 ) 284 ) \
247 ) 285 ) \
248 ), 286 ), \
249 - due to target missing 287 - due to target missing \
250 ) 288 ) \
251 ) 289 )
252 290
253 why = $(space)$(strip $(_why)) !! 291 echo-why = $(call escsq, $(strip $(why)))
254 endif 292 endif
255 293
256 ############################################## 294 ###############################################################################
>> 295 #
>> 296 # When a Kconfig string contains a filename, it is suitable for
>> 297 # passing to shell commands. It is surrounded by double-quotes, and
>> 298 # any double-quotes or backslashes within it are escaped by
>> 299 # backslashes.
>> 300 #
>> 301 # This is no use for dependencies or $(wildcard). We need to strip the
>> 302 # surrounding quotes and the escaping from quotes and backslashes, and
>> 303 # we *do* need to escape any spaces in the string. So, for example:
>> 304 #
>> 305 # Usage: $(eval $(call config_filename,FOO))
>> 306 #
>> 307 # Defines FOO_FILENAME based on the contents of the CONFIG_FOO option,
>> 308 # transformed as described above to be suitable for use within the
>> 309 # makefile.
>> 310 #
>> 311 # Also, if the filename is a relative filename and exists in the source
>> 312 # tree but not the build tree, define FOO_SRCPREFIX as $(srctree)/ to
>> 313 # be prefixed to *both* command invocation and dependencies.
>> 314 #
>> 315 # Note: We also print the filenames in the quiet_cmd_foo text, and
>> 316 # perhaps ought to have a version specially escaped for that purpose.
>> 317 # But it's only cosmetic, and $(patsubst "%",%,$(CONFIG_FOO)) is good
>> 318 # enough. It'll strip the quotes in the common case where there's no
>> 319 # space and it's a simple filename, and it'll retain the quotes when
>> 320 # there's a space. There are some esoteric cases in which it'll print
>> 321 # the wrong thing, but we don't really care. The actual dependencies
>> 322 # and commands *do* get it right, with various combinations of single
>> 323 # and double quotes, backslashes and spaces in the filenames.
>> 324 #
>> 325 ###############################################################################
>> 326 #
>> 327 define config_filename
>> 328 ifneq ($$(CONFIG_$(1)),"")
>> 329 $(1)_FILENAME := $$(subst \\,\,$$(subst \$$(quote),$$(quote),$$(subst $$(space_escape),\$$(space),$$(patsubst "%",%,$$(subst $$(space),$$(space_escape),$$(CONFIG_$(1)))))))
>> 330 ifneq ($$(patsubst /%,%,$$(firstword $$($(1)_FILENAME))),$$(firstword $$($(1)_FILENAME)))
>> 331 else
>> 332 ifeq ($$(wildcard $$($(1)_FILENAME)),)
>> 333 ifneq ($$(wildcard $$(srctree)/$$($(1)_FILENAME)),)
>> 334 $(1)_SRCPREFIX := $(srctree)/
>> 335 endif
>> 336 endif
>> 337 endif
>> 338 endif
>> 339 endef
>> 340 #
>> 341 ###############################################################################
257 342
258 # delete partially updated (i.e. corrupted) fi 343 # delete partially updated (i.e. corrupted) files on error
259 .DELETE_ON_ERROR: 344 .DELETE_ON_ERROR:
260 345
261 # do not delete intermediate files automatical 346 # do not delete intermediate files automatically
262 # <<
263 # .NOTINTERMEDIATE is more correct, but only a <<
264 # Make 4.4 introduced .NOTINTERMEDIATE, and it <<
265 # global .NOTINTERMEDIATE does not work. We ca <<
266 # Use .SECONDARY for older Make versions, but <<
267 # deleted files. <<
268 ifneq ($(and $(filter notintermediate, $(.FEAT <<
269 .NOTINTERMEDIATE: <<
270 else <<
271 .SECONDARY: 347 .SECONDARY:
272 endif <<
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