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authorSam Ravnborg <sam@mars.(none)>2005-07-25 16:10:36 -0400
committerSam Ravnborg <sam@mars.(none)>2005-07-25 16:10:36 -0400
commit8ec4b4ff1c89bb280e662b84eba503ca44abe836 (patch)
treed520638dd0288aba3cff6875928dfa7b7b20d2f1 /scripts
parent7c6b155fb49fbc63e0b30a1d49552693c0b45be7 (diff)
kbuild: introduce Kbuild.include
Kbuild.include is a placeholder for definitions originally present in both the top-level Makefile and scripts/Makefile.build. There were a slight difference in the filechk definition, so the most videly used version was kept and usr/Makefile was adopted for this syntax. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> ---
Diffstat (limited to 'scripts')
-rw-r--r--scripts/Kbuild.include96
-rw-r--r--scripts/Makefile.build1
-rw-r--r--scripts/Makefile.lib94
-rw-r--r--scripts/Makefile.modinst2
-rw-r--r--scripts/Makefile.modpost1
5 files changed, 99 insertions, 95 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
new file mode 100644
index 000000000000..9087273abf91
--- /dev/null
+++ b/scripts/Kbuild.include
@@ -0,0 +1,96 @@
1####
2# kbuild: Generic definitions
3
4# Convinient variables
5comma := ,
6empty :=
7space := $(empty) $(empty)
8
9###
10# The temporary file to save gcc -MD generated dependencies must not
11# contain a comma
12depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
13
14###
15# filechk is used to check if the content of a generated file is updated.
16# Sample usage:
17# define filechk_sample
18# echo $KERNELRELEASE
19# endef
20# version.h : Makefile
21# $(call filechk,sample)
22# The rule defined shall write to stdout the content of the new file.
23# The existing file will be compared with the new one.
24# - If no file exist it is created
25# - If the content differ the new file is used
26# - If they are equal no change, and no timestamp update
27# - stdin is piped in from the first prerequisite ($<) so one has
28# to specify a valid file as first prerequisite (often the kbuild file)
29define filechk
30 $(Q)set -e; \
31 echo ' CHK $@'; \
32 mkdir -p $(dir $@); \
33 $(filechk_$(1)) < $< > $@.tmp; \
34 if [ -r $@ ] && cmp -s $@ $@.tmp; then \
35 rm -f $@.tmp; \
36 else \
37 echo ' UPD $@'; \
38 mv -f $@.tmp $@; \
39 fi
40endef
41
42###
43# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
44# Usage:
45# $(Q)$(MAKE) $(build)=dir
46build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
47
48# If quiet is set, only print short version of command
49cmd = @$(if $($(quiet)cmd_$(1)),\
50 echo ' $(subst ','\'',$($(quiet)cmd_$(1)))' &&) $(cmd_$(1))
51
52###
53# if_changed - execute command if any prerequisite is newer than
54# target, or command line has changed
55# if_changed_dep - as if_changed, but uses fixdep to reveal dependencies
56# including used config symbols
57# if_changed_rule - as if_changed but execute rule instead
58# See Documentation/kbuild/makefiles.txt for more info
59
60ifneq ($(KBUILD_NOCMDDEP),1)
61# Check if both arguments has same arguments. Result in empty string if equal
62# User may override this check using make KBUILD_NOCMDDEP=1
63arg-check = $(strip $(filter-out $(1), $(2)) $(filter-out $(2), $(1)) )
64endif
65
66# echo command. Short version is $(quiet) equals quiet, otherwise full command
67echo-cmd = $(if $($(quiet)cmd_$(1)), \
68 echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';)
69
70# function to only execute the passed command if necessary
71# >'< substitution is for echo to work, >$< substitution to preserve $ when reloading .cmd file
72# note: when using inline perl scripts [perl -e '...$$t=1;...'] in $(cmd_xxx) double $$ your perl vars
73#
74if_changed = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
75 @set -e; \
76 $(echo-cmd) \
77 $(cmd_$(1)); \
78 echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd)
79
80# execute the command and also postprocess generated .d dependencies
81# file
82if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
83 $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
84 @set -e; \
85 $(echo-cmd) \
86 $(cmd_$(1)); \
87 scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
88 rm -f $(depfile); \
89 mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
90
91# Usage: $(call if_changed_rule,foo)
92# will check if $(cmd_foo) changed, or any of the prequisites changed,
93# and if so will execute $(rule_foo)
94if_changed_rule = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ),\
95 @set -e; \
96 $(rule_$(1)))
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 282bfb310f5b..ebed6a41bc69 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -12,6 +12,7 @@ __build:
12 12
13include $(if $(wildcard $(obj)/Kbuild), $(obj)/Kbuild, $(obj)/Makefile) 13include $(if $(wildcard $(obj)/Kbuild), $(obj)/Kbuild, $(obj)/Makefile)
14 14
15include scripts/Kbuild.include
15include scripts/Makefile.lib 16include scripts/Makefile.lib
16 17
17ifdef host-progs 18ifdef host-progs
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 6e079f38a2c6..0f81dcfd6909 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -1,13 +1,3 @@
1# ===========================================================================
2# kbuild: Generic definitions
3# ===========================================================================
4
5# Standard vars
6
7comma := ,
8empty :=
9space := $(empty) $(empty)
10
11# Backward compatibility - to be removed... 1# Backward compatibility - to be removed...
12extra-y += $(EXTRA_TARGETS) 2extra-y += $(EXTRA_TARGETS)
13# Figure out what we need to build from the various variables 3# Figure out what we need to build from the various variables
@@ -84,10 +74,6 @@ multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
84subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) 74subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
85obj-dirs := $(addprefix $(obj)/,$(obj-dirs)) 75obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
86 76
87# The temporary file to save gcc -MD generated dependencies must not
88# contain a comma
89depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
90
91# These flags are needed for modversions and compiling, so we define them here 77# These flags are needed for modversions and compiling, so we define them here
92# already 78# already
93# $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will 79# $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
@@ -179,84 +165,4 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
179quiet_cmd_gzip = GZIP $@ 165quiet_cmd_gzip = GZIP $@
180cmd_gzip = gzip -f -9 < $< > $@ 166cmd_gzip = gzip -f -9 < $< > $@
181 167
182# ===========================================================================
183# Generic stuff
184# ===========================================================================
185
186ifneq ($(KBUILD_NOCMDDEP),1)
187# Check if both arguments has same arguments. Result in empty string if equal
188# User may override this check using make KBUILD_NOCMDDEP=1
189arg-check = $(strip $(filter-out $(1), $(2)) $(filter-out $(2), $(1)) )
190
191endif
192
193# echo command. Short version is $(quiet) equals quiet, otherwise full command
194echo-cmd = $(if $($(quiet)cmd_$(1)), \
195 echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';)
196
197# function to only execute the passed command if necessary
198# >'< substitution is for echo to work, >$< substitution to preserve $ when reloading .cmd file
199# note: when using inline perl scripts [perl -e '...$$t=1;...'] in $(cmd_xxx) double $$ your perl vars
200#
201if_changed = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
202 @set -e; \
203 $(echo-cmd) \
204 $(cmd_$(1)); \
205 echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd)
206
207
208# execute the command and also postprocess generated .d dependencies
209# file
210
211if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
212 $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
213 @set -e; \
214 $(echo-cmd) \
215 $(cmd_$(1)); \
216 scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
217 rm -f $(depfile); \
218 mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
219
220# Usage: $(call if_changed_rule,foo)
221# will check if $(cmd_foo) changed, or any of the prequisites changed,
222# and if so will execute $(rule_foo)
223
224if_changed_rule = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ),\
225 @set -e; \
226 $(rule_$(1)))
227
228# If quiet is set, only print short version of command
229
230cmd = @$(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))' &&) $(cmd_$(1))
231
232# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
233# Usage:
234# $(Q)$(MAKE) $(build)=dir
235build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
236
237# filechk is used to check if the content of a generated file is updated.
238# Sample usage:
239# define filechk_sample
240# echo $KERNELRELEASE
241# endef
242# version.h : Makefile
243# $(call filechk,sample)
244# The rule defined shall write to stdout the content of the new file.
245# The existing file will be compared with the new one.
246# - If no file exist it is created
247# - If the content differ the new file is used
248# - If they are equal no change, and no timestamp update
249
250define filechk
251 $(Q)set -e; \
252 echo ' CHK $@'; \
253 mkdir -p $(dir $@); \
254 $(filechk_$(1)) $(2) > $@.tmp; \
255 if [ -r $@ ] && cmp -s $@ $@.tmp; then \
256 rm -f $@.tmp; \
257 else \
258 echo ' UPD $@'; \
259 mv -f $@.tmp $@; \
260 fi
261endef
262 168
diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst
index 85d6494e3c24..23fd1bdc25ce 100644
--- a/scripts/Makefile.modinst
+++ b/scripts/Makefile.modinst
@@ -5,7 +5,7 @@
5.PHONY: __modinst 5.PHONY: __modinst
6__modinst: 6__modinst:
7 7
8include scripts/Makefile.lib 8include scripts/Kbuild.include
9 9
10# 10#
11 11
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index 94b550e21be8..0c4f3a9f2ea9 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -36,6 +36,7 @@
36_modpost: __modpost 36_modpost: __modpost
37 37
38include .config 38include .config
39include scripts/Kbuild.include
39include scripts/Makefile.lib 40include scripts/Makefile.lib
40 41
41symverfile := $(objtree)/Module.symvers 42symverfile := $(objtree)/Module.symvers