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> ---
This commit is contained in:
Sam Ravnborg
Родитель
7c6b155fb4
Коммит
8ec4b4ff1c
74
Makefile
74
Makefile
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@ -309,6 +309,9 @@ cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
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# Look for make include files relative to root of kernel src
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MAKEFLAGS += --include-dir=$(srctree)
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# We need some generic definitions
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include scripts/Kbuild.include
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# For maximum performance (+ possibly random breakage, uncomment
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# the following)
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@ -367,11 +370,6 @@ export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
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# even be read-only.
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export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
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# The temporary file to save gcc -MD generated dependencies must not
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# contain a comma
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comma := ,
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depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
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# Files to ignore in find ... statements
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RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc \) -prune -o
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@ -1285,72 +1283,6 @@ ifneq ($(cmd_files),)
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include $(cmd_files)
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endif
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# Execute command and generate cmd file
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if_changed = $(if $(strip $? \
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$(filter-out $(cmd_$(1)),$(cmd_$@))\
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$(filter-out $(cmd_$@),$(cmd_$(1)))),\
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@set -e; \
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$(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \
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$(cmd_$(1)); \
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echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd)
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# execute the command and also postprocess generated .d dependencies
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# file
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if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
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$(filter-out $(cmd_$(1)),$(cmd_$@))\
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$(filter-out $(cmd_$@),$(cmd_$(1)))),\
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$(Q)set -e; \
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$(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \
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$(cmd_$(1)); \
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scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
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rm -f $(depfile); \
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mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
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# Usage: $(call if_changed_rule,foo)
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# will check if $(cmd_foo) changed, or any of the prequisites changed,
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# and if so will execute $(rule_foo)
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if_changed_rule = $(if $(strip $? \
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$(filter-out $(cmd_$(1)),$(cmd_$(@F)))\
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$(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\
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$(Q)$(rule_$(1)))
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# If quiet is set, only print short version of command
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cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
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# filechk is used to check if the content of a generated file is updated.
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# Sample usage:
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# define filechk_sample
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# echo $KERNELRELEASE
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# endef
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# version.h : Makefile
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# $(call filechk,sample)
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# The rule defined shall write to stdout the content of the new file.
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# The existing file will be compared with the new one.
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# - If no file exist it is created
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# - If the content differ the new file is used
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# - If they are equal no change, and no timestamp update
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define filechk
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@set -e; \
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echo ' CHK $@'; \
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mkdir -p $(dir $@); \
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$(filechk_$(1)) < $< > $@.tmp; \
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if [ -r $@ ] && cmp -s $@ $@.tmp; then \
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rm -f $@.tmp; \
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else \
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echo ' UPD $@'; \
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mv -f $@.tmp $@; \
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fi
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endef
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# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir
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# Usage:
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# $(Q)$(MAKE) $(build)=dir
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build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
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# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
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# Usage:
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# $(Q)$(MAKE) $(clean)=dir
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@ -0,0 +1,96 @@
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####
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# kbuild: Generic definitions
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# Convinient variables
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comma := ,
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empty :=
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space := $(empty) $(empty)
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###
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# The temporary file to save gcc -MD generated dependencies must not
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# contain a comma
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depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
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###
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# filechk is used to check if the content of a generated file is updated.
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# Sample usage:
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# define filechk_sample
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# echo $KERNELRELEASE
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# endef
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# version.h : Makefile
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# $(call filechk,sample)
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# The rule defined shall write to stdout the content of the new file.
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# The existing file will be compared with the new one.
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# - If no file exist it is created
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# - If the content differ the new file is used
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# - If they are equal no change, and no timestamp update
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# - stdin is piped in from the first prerequisite ($<) so one has
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# to specify a valid file as first prerequisite (often the kbuild file)
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define filechk
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$(Q)set -e; \
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echo ' CHK $@'; \
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mkdir -p $(dir $@); \
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$(filechk_$(1)) < $< > $@.tmp; \
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if [ -r $@ ] && cmp -s $@ $@.tmp; then \
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rm -f $@.tmp; \
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else \
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echo ' UPD $@'; \
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mv -f $@.tmp $@; \
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fi
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endef
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###
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# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
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# Usage:
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# $(Q)$(MAKE) $(build)=dir
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build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
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# If quiet is set, only print short version of command
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cmd = @$(if $($(quiet)cmd_$(1)),\
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echo ' $(subst ','\'',$($(quiet)cmd_$(1)))' &&) $(cmd_$(1))
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###
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# if_changed - execute command if any prerequisite is newer than
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# target, or command line has changed
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# if_changed_dep - as if_changed, but uses fixdep to reveal dependencies
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# including used config symbols
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# if_changed_rule - as if_changed but execute rule instead
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# See Documentation/kbuild/makefiles.txt for more info
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ifneq ($(KBUILD_NOCMDDEP),1)
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# Check if both arguments has same arguments. Result in empty string if equal
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# User may override this check using make KBUILD_NOCMDDEP=1
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arg-check = $(strip $(filter-out $(1), $(2)) $(filter-out $(2), $(1)) )
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endif
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# echo command. Short version is $(quiet) equals quiet, otherwise full command
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echo-cmd = $(if $($(quiet)cmd_$(1)), \
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echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';)
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# function to only execute the passed command if necessary
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# >'< substitution is for echo to work, >$< substitution to preserve $ when reloading .cmd file
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# note: when using inline perl scripts [perl -e '...$$t=1;...'] in $(cmd_xxx) double $$ your perl vars
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#
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if_changed = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
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@set -e; \
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$(echo-cmd) \
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$(cmd_$(1)); \
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echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd)
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# execute the command and also postprocess generated .d dependencies
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# file
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if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
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$(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
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@set -e; \
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$(echo-cmd) \
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$(cmd_$(1)); \
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scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
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rm -f $(depfile); \
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mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
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# Usage: $(call if_changed_rule,foo)
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# will check if $(cmd_foo) changed, or any of the prequisites changed,
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# and if so will execute $(rule_foo)
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if_changed_rule = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ),\
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@set -e; \
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$(rule_$(1)))
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@ -12,6 +12,7 @@ __build:
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include $(if $(wildcard $(obj)/Kbuild), $(obj)/Kbuild, $(obj)/Makefile)
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include scripts/Kbuild.include
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include scripts/Makefile.lib
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ifdef host-progs
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@ -1,13 +1,3 @@
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# ===========================================================================
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# kbuild: Generic definitions
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# ===========================================================================
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# Standard vars
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comma := ,
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empty :=
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space := $(empty) $(empty)
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# Backward compatibility - to be removed...
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extra-y += $(EXTRA_TARGETS)
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# Figure out what we need to build from the various variables
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@ -84,10 +74,6 @@ multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
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subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
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obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
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# The temporary file to save gcc -MD generated dependencies must not
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# contain a comma
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depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
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# These flags are needed for modversions and compiling, so we define them here
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# already
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# $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
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@ -179,84 +165,4 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
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quiet_cmd_gzip = GZIP $@
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cmd_gzip = gzip -f -9 < $< > $@
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# ===========================================================================
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# Generic stuff
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# ===========================================================================
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ifneq ($(KBUILD_NOCMDDEP),1)
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# Check if both arguments has same arguments. Result in empty string if equal
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# User may override this check using make KBUILD_NOCMDDEP=1
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arg-check = $(strip $(filter-out $(1), $(2)) $(filter-out $(2), $(1)) )
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endif
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# echo command. Short version is $(quiet) equals quiet, otherwise full command
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echo-cmd = $(if $($(quiet)cmd_$(1)), \
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echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';)
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# function to only execute the passed command if necessary
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# >'< substitution is for echo to work, >$< substitution to preserve $ when reloading .cmd file
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# note: when using inline perl scripts [perl -e '...$$t=1;...'] in $(cmd_xxx) double $$ your perl vars
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#
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if_changed = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
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@set -e; \
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$(echo-cmd) \
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$(cmd_$(1)); \
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echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd)
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# execute the command and also postprocess generated .d dependencies
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# file
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if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
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$(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
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@set -e; \
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$(echo-cmd) \
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$(cmd_$(1)); \
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scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
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rm -f $(depfile); \
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mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
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# Usage: $(call if_changed_rule,foo)
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# will check if $(cmd_foo) changed, or any of the prequisites changed,
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# and if so will execute $(rule_foo)
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if_changed_rule = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ),\
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@set -e; \
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$(rule_$(1)))
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# If quiet is set, only print short version of command
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cmd = @$(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))' &&) $(cmd_$(1))
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# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
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# Usage:
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# $(Q)$(MAKE) $(build)=dir
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build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
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# filechk is used to check if the content of a generated file is updated.
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# Sample usage:
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# define filechk_sample
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# echo $KERNELRELEASE
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# endef
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# version.h : Makefile
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# $(call filechk,sample)
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# The rule defined shall write to stdout the content of the new file.
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# The existing file will be compared with the new one.
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# - If no file exist it is created
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# - If the content differ the new file is used
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# - If they are equal no change, and no timestamp update
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define filechk
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$(Q)set -e; \
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echo ' CHK $@'; \
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mkdir -p $(dir $@); \
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$(filechk_$(1)) $(2) > $@.tmp; \
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if [ -r $@ ] && cmp -s $@ $@.tmp; then \
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rm -f $@.tmp; \
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else \
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echo ' UPD $@'; \
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mv -f $@.tmp $@; \
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fi
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endef
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@ -5,7 +5,7 @@
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.PHONY: __modinst
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__modinst:
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include scripts/Makefile.lib
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include scripts/Kbuild.include
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#
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@ -36,6 +36,7 @@
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_modpost: __modpost
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include .config
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include scripts/Kbuild.include
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include scripts/Makefile.lib
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symverfile := $(objtree)/Module.symvers
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@ -27,7 +27,7 @@ quotefixed_initramfs_source := $(shell echo $(CONFIG_INITRAMFS_SOURCE))
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filechk_initramfs_list = $(CONFIG_SHELL) \
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$(srctree)/scripts/gen_initramfs_list.sh $(gen_initramfs_args) $(quotefixed_initramfs_source)
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$(obj)/initramfs_list: FORCE
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$(obj)/initramfs_list: $(obj)/Makefile FORCE
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$(call filechk,initramfs_list)
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quiet_cmd_cpio = CPIO $@
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