blob: 460acd61f9ef02796afff61f9168949123adfb06 [file] [log] [blame]
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +09001####
2# kbuild: Generic definitions
3
4# Convenient variables
5comma := ,
Masahiro Yamada9cf2a452014-04-15 13:29:00 +09006quote := "
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +09007squote := '
8empty :=
9space := $(empty) $(empty)
Rasmus Villemoesc17cb562018-09-19 11:35:56 +090010pound := \#
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +090011
12###
13# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
14dot-target = $(dir $@).$(notdir $@)
15
16###
17# The temporary file to save gcc -MD generated dependencies must not
18# contain a comma
19depfile = $(subst $(comma),_,$(dot-target).d)
20
21###
22# filename of target with directory and extension stripped
23basetarget = $(basename $(notdir $@))
24
25###
26# filename of first prerequisite with directory and extension stripped
27baseprereq = $(basename $(notdir $<))
28
29###
30# Escape single quote for use in echo statements
31escsq = $(subst $(squote),'\$(squote)',$1)
32
33###
34# Easy method for doing a status message
35 kecho := :
36 quiet_kecho := echo
37silent_kecho := :
38kecho := $($(quiet)kecho)
39
40###
41# filechk is used to check if the content of a generated file is updated.
42# Sample usage:
43# define filechk_sample
44# echo $KERNELRELEASE
45# endef
46# version.h : Makefile
47# $(call filechk,sample)
48# The rule defined shall write to stdout the content of the new file.
49# The existing file will be compared with the new one.
50# - If no file exist it is created
51# - If the content differ the new file is used
52# - If they are equal no change, and no timestamp update
53# - stdin is piped in from the first prerequisite ($<) so one has
54# to specify a valid file as first prerequisite (often the kbuild file)
55define filechk
56 $(Q)set -e; \
57 $(kecho) ' CHK $@'; \
58 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 Yamada4ba02882014-02-04 17:24:44 +090090# modifed for U-Boot: prevent cc-option from leaving .*.su files
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +090091try-run = $(shell set -e; \
92 TMP="$(TMPOUT).$$$$.tmp"; \
93 TMPO="$(TMPOUT).$$$$.o"; \
Masahiro Yamada4ba02882014-02-04 17:24:44 +090094 TMPSU="$(TMPOUT).$$$$.su"; \
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +090095 if ($(1)) >/dev/null 2>&1; \
96 then echo "$(2)"; \
97 else echo "$(3)"; \
98 fi; \
Masahiro Yamada4ba02882014-02-04 17:24:44 +090099 rm -f "$$TMP" "$$TMPO" "$$TMPSU")
Masahiro Yamada6e0a77f2014-02-04 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
113# cc-option
114# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
115
116cc-option = $(call try-run,\
Jeroen Hofstee43a8d112014-07-30 21:54:51 +0200117 $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900118
119# cc-option-yn
120# Usage: flag := $(call cc-option-yn,-march=winchip-c6)
121cc-option-yn = $(call try-run,\
Jeroen Hofstee43a8d112014-07-30 21:54:51 +0200122 $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n)
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900123
124# cc-option-align
125# Prefix align with either -falign or -malign
126cc-option-align = $(subst -functions=0,,\
127 $(call cc-option,-falign-functions=0,-malign-functions=0))
128
129# cc-disable-warning
130# Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
131cc-disable-warning = $(call try-run,\
132 $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
133
Tom Rini1611b842016-01-19 20:39:01 -0500134# cc-name
135# Expands to either gcc or clang
136cc-name = $(shell $(CC) -v 2>&1 | grep -q "clang version" && echo clang || echo gcc)
137
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900138# cc-version
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900139cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC))
140
141# cc-fullversion
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900142cc-fullversion = $(shell $(CONFIG_SHELL) \
143 $(srctree)/scripts/gcc-version.sh -p $(CC))
144
145# cc-ifversion
146# Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
Masahiro Yamada56fc3ba2015-07-05 01:56:55 +0900147cc-ifversion = $(shell [ $(cc-version) $(1) $(2) ] && echo $(3) || echo $(4))
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900148
Masahiro Yamada7449ab12014-02-04 17:24:18 +0900149# added for U-Boot
150binutils-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/binutils-version.sh $(AS))
151dtc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/dtc-version.sh $(DTC))
152
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900153# cc-ldoption
154# Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both)
155cc-ldoption = $(call try-run,\
156 $(CC) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
157
158# ld-option
159# Usage: LDFLAGS += $(call ld-option, -X)
160ld-option = $(call try-run,\
161 $(CC) -x c /dev/null -c -o "$$TMPO" ; $(LD) $(1) "$$TMPO" -o "$$TMP",$(1),$(2))
162
163# ar-option
164# Usage: KBUILD_ARFLAGS := $(call ar-option,D)
165# Important: no spaces around options
166ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2))
167
Masahiro Yamada9cf2a452014-04-15 13:29:00 +0900168# ld-version
Masahiro Yamada9cf2a452014-04-15 13:29:00 +0900169# Note this is mainly for HJ Lu's 3 number binutil versions
170ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh)
171
172# ld-ifversion
173# Usage: $(call ld-ifversion, -ge, 22252, y)
Masahiro Yamada56fc3ba2015-07-05 01:56:55 +0900174ld-ifversion = $(shell [ $(ld-version) $(1) $(2) ] && echo $(3) || echo $(4))
Masahiro Yamada9cf2a452014-04-15 13:29:00 +0900175
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900176######
177
178###
179# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
180# Usage:
181# $(Q)$(MAKE) $(build)=dir
Masahiro Yamadaede865b2014-10-30 11:06:13 +0900182build := -f $(srctree)/scripts/Makefile.build obj
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900183
184###
185# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.modbuiltin obj=
186# Usage:
187# $(Q)$(MAKE) $(modbuiltin)=dir
Masahiro Yamadaede865b2014-10-30 11:06:13 +0900188modbuiltin := -f $(srctree)/scripts/Makefile.modbuiltin obj
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900189
Masahiro Yamada56fc3ba2015-07-05 01:56:55 +0900190###
191# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj=
192# Usage:
193# $(Q)$(MAKE) $(dtbinst)=dir
194dtbinst := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.dtbinst obj
195
196###
197# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=
198# Usage:
199# $(Q)$(MAKE) $(clean)=dir
200clean := -f $(srctree)/scripts/Makefile.clean obj
201
202###
203# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.headersinst obj=
204# Usage:
205# $(Q)$(MAKE) $(hdr-inst)=dir
206hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
207
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900208# Prefix -I with $(srctree) if it is not an absolute path.
209# skip if -I has no parameter
210addtree = $(if $(patsubst -I%,%,$(1)), \
211$(if $(filter-out -I/%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1))) $(1))
212
213# Find all -I options and call addtree
214flags = $(foreach o,$($(1)),$(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o)))
215
216# echo command.
217# Short version is used, if $(quiet) equals `quiet_', otherwise full one.
218echo-cmd = $(if $($(quiet)cmd_$(1)),\
219 echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';)
220
221# printing commands
222cmd = @$(echo-cmd) $(cmd_$(1))
223
224# Add $(obj)/ for paths that are not absolute
225objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
226
227###
228# if_changed - execute command if any prerequisite is newer than
229# target, or command line has changed
230# if_changed_dep - as if_changed, but uses fixdep to reveal dependencies
231# including used config symbols
232# if_changed_rule - as if_changed but execute rule instead
233# See Documentation/kbuild/makefiles.txt for more info
234
235ifneq ($(KBUILD_NOCMDDEP),1)
236# Check if both arguments has same arguments. Result is empty string if equal.
237# User may override this check using make KBUILD_NOCMDDEP=1
238arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
239 $(filter-out $(cmd_$@), $(cmd_$(1))) )
240else
241arg-check = $(if $(strip $(cmd_$@)),,1)
242endif
243
Masahiro Yamadaede865b2014-10-30 11:06:13 +0900244# Replace >$< with >$$< to preserve $ when reloading the .cmd file
245# (needed for make)
Rasmus Villemoesc17cb562018-09-19 11:35:56 +0900246# Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file
Masahiro Yamadaede865b2014-10-30 11:06:13 +0900247# (needed for make)
248# Replace >'< with >'\''< to be able to enclose the whole string in '...'
249# (needed for the shell)
Rasmus Villemoesc17cb562018-09-19 11:35:56 +0900250make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1)))))
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900251
252# Find any prerequisites that is newer than target or that does not exist.
253# PHONY targets skipped in both cases.
254any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
255
256# Execute command if command has changed or prerequisite(s) are updated.
257#
258if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
259 @set -e; \
260 $(echo-cmd) $(cmd_$(1)); \
Masahiro Yamadaede865b2014-10-30 11:06:13 +0900261 printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
Masahiro Yamada6e0a77f2014-02-04 17:24:17 +0900262
263# Execute the command and also postprocess generated .d dependencies file.
264if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \
265 @set -e; \
266 $(echo-cmd) $(cmd_$(1)); \
267 scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\
268 rm -f $(depfile); \
269 mv -f $(dot-target).tmp $(dot-target).cmd)
270
271# Usage: $(call if_changed_rule,foo)
272# Will check if $(cmd_foo) or any of the prerequisites changed,
273# and if so will execute $(rule_foo).
274if_changed_rule = $(if $(strip $(any-prereq) $(arg-check) ), \
275 @set -e; \
276 $(rule_$(1)))
277
278###
279# why - tell why a a target got build
280# enabled by make V=2
281# Output (listed in the order they are checked):
282# (1) - due to target is PHONY
283# (2) - due to target missing
284# (3) - due to: file1.h file2.h
285# (4) - due to command line change
286# (5) - due to missing .cmd file
287# (6) - due to target not in $(targets)
288# (1) PHONY targets are always build
289# (2) No target, so we better build it
290# (3) Prerequisite is newer than target
291# (4) The command line stored in the file named dir/.target.cmd
292# differed from actual command line. This happens when compiler
293# options changes
294# (5) No dir/.target.cmd file (used to store command line)
295# (6) No dir/.target.cmd file and target not listed in $(targets)
296# This is a good hint that there is a bug in the kbuild file
297ifeq ($(KBUILD_VERBOSE),2)
298why = \
299 $(if $(filter $@, $(PHONY)),- due to target is PHONY, \
300 $(if $(wildcard $@), \
301 $(if $(strip $(any-prereq)),- due to: $(any-prereq), \
302 $(if $(arg-check), \
303 $(if $(cmd_$@),- due to command line change, \
304 $(if $(filter $@, $(targets)), \
305 - due to missing .cmd file, \
306 - due to $(notdir $@) not in $$(targets) \
307 ) \
308 ) \
309 ) \
310 ), \
311 - due to target missing \
312 ) \
313 )
314
315echo-why = $(call escsq, $(strip $(why)))
316endif
Masahiro Yamada10a7a6c2015-08-12 07:31:42 +0900317
Masahiro Yamadafa380702019-01-11 19:42:26 +0900318# delete partially updated (i.e. corrupted) files on error
319.DELETE_ON_ERROR:
320
Masahiro Yamada10a7a6c2015-08-12 07:31:42 +0900321ifdef CONFIG_SPL_BUILD
322SPL_ := SPL_
Simon Glass74254d02017-04-02 09:50:30 -0600323ifeq ($(CONFIG_TPL_BUILD),y)
324SPL_TPL_ := TPL_
325else
326SPL_TPL_ := SPL_
327endif
Masahiro Yamada10a7a6c2015-08-12 07:31:42 +0900328else
329SPL_ :=
Simon Glass74254d02017-04-02 09:50:30 -0600330SPL_TPL_ :=
Masahiro Yamada10a7a6c2015-08-12 07:31:42 +0900331endif