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Masahiro Yamadaceec4c82014-02-04 17:24:17 +09001####
2# kbuild: Generic definitions
3
4# Convenient variables
5comma := ,
Masahiro Yamada598e2d32014-04-15 13:29:00 +09006quote := "
Masahiro Yamadaceec4c82014-02-04 17:24:17 +09007squote := '
8empty :=
9space := $(empty) $(empty)
Masahiro Yamadab5a20462020-04-17 16:21:36 +090010space_escape := _-_SPACE_-_
Rasmus Villemoese5e701c2018-09-19 11:35:56 +090011pound := \#
Masahiro Yamadaceec4c82014-02-04 17:24:17 +090012
13###
14# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
15dot-target = $(dir $@).$(notdir $@)
16
17###
18# The temporary file to save gcc -MD generated dependencies must not
19# contain a comma
20depfile = $(subst $(comma),_,$(dot-target).d)
21
22###
23# filename of target with directory and extension stripped
24basetarget = $(basename $(notdir $@))
25
26###
27# filename of first prerequisite with directory and extension stripped
28baseprereq = $(basename $(notdir $<))
29
30###
31# Escape single quote for use in echo statements
32escsq = $(subst $(squote),'\$(squote)',$1)
33
34###
35# Easy method for doing a status message
36 kecho := :
37 quiet_kecho := echo
38silent_kecho := :
39kecho := $($(quiet)kecho)
40
41###
42# filechk is used to check if the content of a generated file is updated.
43# Sample usage:
44# define filechk_sample
45# echo $KERNELRELEASE
46# endef
47# version.h : Makefile
48# $(call filechk,sample)
49# The rule defined shall write to stdout the content of the new file.
50# The existing file will be compared with the new one.
51# - If no file exist it is created
52# - If the content differ the new file is used
53# - If they are equal no change, and no timestamp update
54# - stdin is piped in from the first prerequisite ($<) so one has
55# to specify a valid file as first prerequisite (often the kbuild file)
56define filechk
57 $(Q)set -e; \
Masahiro Yamadaceec4c82014-02-04 17:24:17 +090058 mkdir -p $(dir $@); \
59 $(filechk_$(1)) < $< > $@.tmp; \
60 if [ -r $@ ] && cmp -s $@ $@.tmp; then \
61 rm -f $@.tmp; \
62 else \
63 $(kecho) ' UPD $@'; \
64 mv -f $@.tmp $@; \
65 fi
66endef
67
68######
69# gcc support functions
70# See documentation in Documentation/kbuild/makefiles.txt
71
72# cc-cross-prefix
73# Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-)
74# Return first prefix where a prefix$(CC) is found in PATH.
75# If no $(CC) found in PATH with listed prefixes return nothing
76cc-cross-prefix = \
77 $(word 1, $(foreach c,$(1), \
78 $(shell set -e; \
79 if (which $(strip $(c))$(CC)) > /dev/null 2>&1 ; then \
80 echo $(c); \
81 fi)))
82
83# output directory for tests below
84TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/)
85
86# try-run
87# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
88# Exit code chooses option. "$$TMP" is can be used as temporary file and
89# is automatically cleaned up.
Masahiro Yamada9a368d02014-02-04 17:24:44 +090090# modifed for U-Boot: prevent cc-option from leaving .*.su files
Masahiro Yamadaceec4c82014-02-04 17:24:17 +090091try-run = $(shell set -e; \
92 TMP="$(TMPOUT).$$$$.tmp"; \
93 TMPO="$(TMPOUT).$$$$.o"; \
Masahiro Yamada9a368d02014-02-04 17:24:44 +090094 TMPSU="$(TMPOUT).$$$$.su"; \
Masahiro Yamadaceec4c82014-02-04 17:24:17 +090095 if ($(1)) >/dev/null 2>&1; \
96 then echo "$(2)"; \
97 else echo "$(3)"; \
98 fi; \
Masahiro Yamada9a368d02014-02-04 17:24:44 +090099 rm -f "$$TMP" "$$TMPO" "$$TMPSU")
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900100
101# as-option
102# Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,)
103
104as-option = $(call try-run,\
105 $(CC) $(KBUILD_CFLAGS) $(1) -c -x assembler /dev/null -o "$$TMP",$(1),$(2))
106
107# as-instr
108# Usage: cflags-y += $(call as-instr,instr,option1,option2)
109
110as-instr = $(call try-run,\
111 printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
112
Tom Rini587e4a42020-03-27 11:46:27 -0400113# __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 "$$TMP",$(3),$(4))
117
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900118# cc-option
119# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
Tom Rini587e4a42020-03-27 11:46:27 -0400120cc-option = $(call __cc-option, $(CC),\
121 $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS),$(1),$(2))
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900122
Tom Rini587e4a42020-03-27 11:46:27 -0400123# hostcc-option
124# Usage: cflags-y += $(call hostcc-option,-march=winchip-c6,-march=i586)
125hostcc-option = $(call __cc-option, $(HOSTCC),\
126 $(HOSTCFLAGS) $(HOST_EXTRACFLAGS),$(1),$(2))
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900127
128# cc-option-yn
129# Usage: flag := $(call cc-option-yn,-march=winchip-c6)
130cc-option-yn = $(call try-run,\
Jeroen Hofstee1401d872014-07-30 21:54:51 +0200131 $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n)
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900132
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900133# cc-disable-warning
134# Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
135cc-disable-warning = $(call try-run,\
Tom Rini587e4a42020-03-27 11:46:27 -0400136 $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900137
Tom Rini29c4d282016-01-19 20:39:01 -0500138# cc-name
139# Expands to either gcc or clang
140cc-name = $(shell $(CC) -v 2>&1 | grep -q "clang version" && echo clang || echo gcc)
141
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900142# cc-version
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900143cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC))
144
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900145# cc-ifversion
146# Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
Masahiro Yamada98bd0e02015-07-05 01:56:55 +0900147cc-ifversion = $(shell [ $(cc-version) $(1) $(2) ] && echo $(3) || echo $(4))
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900148
Masahiro Yamadabf4b3de2014-02-04 17:24:18 +0900149# added for U-Boot
150binutils-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/binutils-version.sh $(AS))
Simon Glassd7faa082021-09-22 11:34:43 -0600151dtc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/dtc-version.sh $(DTC))
Masahiro Yamadabf4b3de2014-02-04 17:24:18 +0900152
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900153# cc-ldoption
154# Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both)
155cc-ldoption = $(call try-run,\
Tom Rini587e4a42020-03-27 11:46:27 -0400156 $(CC) $(1) $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900157
158# ld-option
Tom Rini587e4a42020-03-27 11:46:27 -0400159# Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y)
160ld-option = $(call try-run, $(LD) $(KBUILD_LDFLAGS) $(1) -v,$(1),$(2),$(3))
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900161
162# ar-option
163# Usage: KBUILD_ARFLAGS := $(call ar-option,D)
164# Important: no spaces around options
165ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2))
166
Masahiro Yamada598e2d32014-04-15 13:29:00 +0900167# ld-version
Masahiro Yamada598e2d32014-04-15 13:29:00 +0900168# Note this is mainly for HJ Lu's 3 number binutil versions
169ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh)
170
171# ld-ifversion
172# Usage: $(call ld-ifversion, -ge, 22252, y)
Masahiro Yamada98bd0e02015-07-05 01:56:55 +0900173ld-ifversion = $(shell [ $(ld-version) $(1) $(2) ] && echo $(3) || echo $(4))
Masahiro Yamada598e2d32014-04-15 13:29:00 +0900174
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900175######
176
177###
178# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
179# Usage:
180# $(Q)$(MAKE) $(build)=dir
Masahiro Yamada176d0982014-10-30 11:06:13 +0900181build := -f $(srctree)/scripts/Makefile.build obj
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900182
183###
184# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.modbuiltin obj=
185# Usage:
186# $(Q)$(MAKE) $(modbuiltin)=dir
Masahiro Yamada176d0982014-10-30 11:06:13 +0900187modbuiltin := -f $(srctree)/scripts/Makefile.modbuiltin obj
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900188
Masahiro Yamada98bd0e02015-07-05 01:56:55 +0900189###
190# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj=
191# Usage:
192# $(Q)$(MAKE) $(dtbinst)=dir
Tom Rini473fc272021-06-17 18:07:25 -0400193dtbinst := -f $(srctree)/scripts/Makefile.dtbinst obj
Masahiro Yamada98bd0e02015-07-05 01:56:55 +0900194
195###
196# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=
197# Usage:
198# $(Q)$(MAKE) $(clean)=dir
199clean := -f $(srctree)/scripts/Makefile.clean obj
200
201###
202# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.headersinst obj=
203# Usage:
204# $(Q)$(MAKE) $(hdr-inst)=dir
205hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
206
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900207# Prefix -I with $(srctree) if it is not an absolute path.
208# skip if -I has no parameter
209addtree = $(if $(patsubst -I%,%,$(1)), \
Tom Rini5972ff02020-03-11 18:11:17 -0400210$(if $(filter-out -I/% -I./% -I../%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1)),$(1)),$(1))
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900211
212# Find all -I options and call addtree
213flags = $(foreach o,$($(1)),$(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o)))
214
215# echo command.
216# Short version is used, if $(quiet) equals `quiet_', otherwise full one.
217echo-cmd = $(if $($(quiet)cmd_$(1)),\
218 echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';)
219
220# printing commands
221cmd = @$(echo-cmd) $(cmd_$(1))
222
223# Add $(obj)/ for paths that are not absolute
224objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
225
226###
227# if_changed - execute command if any prerequisite is newer than
228# target, or command line has changed
229# if_changed_dep - as if_changed, but uses fixdep to reveal dependencies
230# including used config symbols
231# if_changed_rule - as if_changed but execute rule instead
232# See Documentation/kbuild/makefiles.txt for more info
233
234ifneq ($(KBUILD_NOCMDDEP),1)
Masahiro Yamadab5a20462020-04-17 16:21:36 +0900235# Check if both arguments are the same including their order. Result is empty
236# string if equal. User may override this check using make KBUILD_NOCMDDEP=1
237arg-check = $(filter-out $(subst $(space),$(space_escape),$(strip $(cmd_$@))), \
238 $(subst $(space),$(space_escape),$(strip $(cmd_$1))))
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900239else
240arg-check = $(if $(strip $(cmd_$@)),,1)
241endif
242
Masahiro Yamada176d0982014-10-30 11:06:13 +0900243# Replace >$< with >$$< to preserve $ when reloading the .cmd file
244# (needed for make)
Rasmus Villemoese5e701c2018-09-19 11:35:56 +0900245# Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file
Masahiro Yamada176d0982014-10-30 11:06:13 +0900246# (needed for make)
247# Replace >'< with >'\''< to be able to enclose the whole string in '...'
248# (needed for the shell)
Rasmus Villemoese5e701c2018-09-19 11:35:56 +0900249make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1)))))
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900250
251# Find any prerequisites that is newer than target or that does not exist.
252# PHONY targets skipped in both cases.
253any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
254
255# Execute command if command has changed or prerequisite(s) are updated.
256#
257if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
258 @set -e; \
259 $(echo-cmd) $(cmd_$(1)); \
Masahiro Yamadab5a20462020-04-17 16:21:36 +0900260 printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900261
262# Execute the command and also postprocess generated .d dependencies file.
263if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \
264 @set -e; \
265 $(echo-cmd) $(cmd_$(1)); \
266 scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\
267 rm -f $(depfile); \
Masahiro Yamadab5a20462020-04-17 16:21:36 +0900268 mv -f $(dot-target).tmp $(dot-target).cmd, @:)
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900269
270# Usage: $(call if_changed_rule,foo)
271# Will check if $(cmd_foo) or any of the prerequisites changed,
272# and if so will execute $(rule_foo).
273if_changed_rule = $(if $(strip $(any-prereq) $(arg-check) ), \
274 @set -e; \
Masahiro Yamadab5a20462020-04-17 16:21:36 +0900275 $(rule_$(1)), @:)
Masahiro Yamadaceec4c82014-02-04 17:24:17 +0900276
277###
278# why - tell why a a target got build
279# enabled by make V=2
280# Output (listed in the order they are checked):
281# (1) - due to target is PHONY
282# (2) - due to target missing
283# (3) - due to: file1.h file2.h
284# (4) - due to command line change
285# (5) - due to missing .cmd file
286# (6) - due to target not in $(targets)
287# (1) PHONY targets are always build
288# (2) No target, so we better build it
289# (3) Prerequisite is newer than target
290# (4) The command line stored in the file named dir/.target.cmd
291# differed from actual command line. This happens when compiler
292# options changes
293# (5) No dir/.target.cmd file (used to store command line)
294# (6) No dir/.target.cmd file and target not listed in $(targets)
295# This is a good hint that there is a bug in the kbuild file
296ifeq ($(KBUILD_VERBOSE),2)
297why = \
298 $(if $(filter $@, $(PHONY)),- due to target is PHONY, \
299 $(if $(wildcard $@), \
300 $(if $(strip $(any-prereq)),- due to: $(any-prereq), \
301 $(if $(arg-check), \
302 $(if $(cmd_$@),- due to command line change, \
303 $(if $(filter $@, $(targets)), \
304 - due to missing .cmd file, \
305 - due to $(notdir $@) not in $$(targets) \
306 ) \
307 ) \
308 ) \
309 ), \
310 - due to target missing \
311 ) \
312 )
313
314echo-why = $(call escsq, $(strip $(why)))
315endif
Masahiro Yamada04a5c402015-08-12 07:31:42 +0900316
Masahiro Yamada368a0df2019-01-11 19:42:26 +0900317# delete partially updated (i.e. corrupted) files on error
318.DELETE_ON_ERROR:
319
Masahiro Yamadac16b1372019-01-11 19:42:27 +0900320# do not delete intermediate files automatically
321.SECONDARY:
322
Masahiro Yamada04a5c402015-08-12 07:31:42 +0900323ifdef CONFIG_SPL_BUILD
324SPL_ := SPL_
Simon Glass001f3142017-04-02 09:50:30 -0600325ifeq ($(CONFIG_TPL_BUILD),y)
326SPL_TPL_ := TPL_
327else
328SPL_TPL_ := SPL_
329endif
Masahiro Yamada04a5c402015-08-12 07:31:42 +0900330else
331SPL_ :=
Simon Glass001f3142017-04-02 09:50:30 -0600332SPL_TPL_ :=
Masahiro Yamada04a5c402015-08-12 07:31:42 +0900333endif