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Commit e846b41a authored by Kai Germaschewski's avatar Kai Germaschewski
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kbuild: Convert build and modversion phases 

Alright, so now actually all four phases are converted to new-style,
i.e. we call make -f scripts/Makefile.<phase> which includes the
actual subdir Makefile.

The obvious drawback is some code duplication between the four
scripts/Makefile.<phase>, which could easily be overcome including
shared parts, but since I'm going for maximum performance, I did not
for now.

Rules.make is empty now ;) (Well, not quite, since if it was 0 bytes,
make mrproper would remove it...)
parent eea25415
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Showing with 445 additions and 392 deletions
Makefile
View file @ e846b41a
......@@ -106,6 +106,11 @@ endif
MAKEFLAGS += --no-print-directory
# For maximum performance (+ possibly random breakage, uncomment
# the following)
#MAKEFLAGS += -rR
# If the user wants quiet mode, echo short versions of the commands
# only
......@@ -146,7 +151,6 @@ NM = $(CROSS_COMPILE)nm
STRIP = $(CROSS_COMPILE)strip
OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
MAKEFILES = .config
GENKSYMS = /sbin/genksyms
DEPMOD = /sbin/depmod
KALLSYMS = /sbin/kallsyms
......@@ -165,7 +169,7 @@ AFLAGS := -D__ASSEMBLY__ $(CPPFLAGS)
export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \
CONFIG_SHELL TOPDIR HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
CPP AR NM STRIP OBJCOPY OBJDUMP MAKE MAKEFILES GENKSYMS PERL
CPP AR NM STRIP OBJCOPY OBJDUMP MAKE GENKSYMS PERL
export CPPFLAGS NOSTDINC_FLAGS OBJCOPYFLAGS LDFLAGS
export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
......@@ -369,7 +373,7 @@ $(sort $(vmlinux-objs)): $(SUBDIRS) ;
.PHONY: $(SUBDIRS)
$(SUBDIRS): .hdepend prepare
+@$(call descend,$@,)
+$(call descend,$@,)
# Things we need done before we descend to build or make
# module versions are listed in "prepare"
......@@ -476,9 +480,11 @@ ifdef CONFIG_MODVERSIONS
# Update modversions.h, but only if it would change.
include/linux/modversions.h: FORCE
.PHONY: __rm_tmp_export-objs
__rm_tmp_export-objs:
@rm -rf .tmp_export-objs
@$(MAKE) $(patsubst %,_sfdep_%,$(SUBDIRS))
include/linux/modversions.h: $(patsubst %,_modver_%,$(SUBDIRS))
@echo -n ' Generating $@'
@( echo "#ifndef _LINUX_MODVERSIONS_H";\
echo "#define _LINUX_MODVERSIONS_H"; \
......@@ -491,8 +497,9 @@ include/linux/modversions.h: FORCE
) > $@.tmp; \
$(update-if-changed)
$(patsubst %,_sfdep_%,$(SUBDIRS)): FORCE
+@$(call descend,$(patsubst _sfdep_%,%,$@),fastdep)
.PHONY: $(patsubst %, _modver_%, $(SUBDIRS))
$(patsubst %, _modver_%, $(SUBDIRS)): __rm_tmp_export-objs
$(Q)$(MAKE) -f scripts/Makefile.modver obj=$(patsubst _modver_%,%,$@)
else # !CONFIG_MODVERSIONS
......@@ -544,7 +551,7 @@ _modinst_post:
.PHONY: $(patsubst %, _modinst_%, $(SUBDIRS))
$(patsubst %, _modinst_%, $(SUBDIRS)) :
$(Q)$(MAKE) MAKEFILES= -rR -f scripts/Makefile.modinst obj=$(patsubst _modinst_%,%,$@)
$(Q)$(MAKE) -f scripts/Makefile.modinst obj=$(patsubst _modinst_%,%,$@)
else # CONFIG_MODULES
# Modules not configured
......@@ -701,7 +708,7 @@ MRPROPER_DIRS += \
clean-dirs += $(ALL_SUBDIRS) Documentation/DocBook scripts
$(addprefix _clean_,$(clean-dirs)):
$(Q)$(MAKE) MAKEFILES= -rR -f scripts/Makefile.clean obj=$(patsubst _clean_%,%,$@)
$(Q)$(MAKE) -f scripts/Makefile.clean obj=$(patsubst _clean_%,%,$@)
quiet_cmd_rmclean = RM $$(CLEAN_FILES)
cmd_rmclean = rm -f $(CLEAN_FILES)
......@@ -890,9 +897,6 @@ endef
# $(call descend,<dir>,<target>)
# Recursively call a sub-make in <dir> with target <target>
ifeq ($(KBUILD_VERBOSE),1)
descend = echo '$(MAKE) -f $(1)/Makefile $(2)';
endif
descend += $(MAKE) -f $(1)/Makefile obj=$(1) $(2)
descend = $(Q)$(MAKE) -f scripts/Makefile.build obj=$(1) $(2)
FORCE:
Rules.make
View file @ e846b41a
ifndef no-rules.make
#
# This file contains rules which are shared between multiple Makefiles.
#
# Some standard vars
comma := ,
empty :=
space := $(empty) $(empty)
# Some bug traps
# ---------------------------------------------------------------------------
ifdef O_TARGET
$(error kbuild: $(obj)/Makefile - Usage of O_TARGET := $(O_TARGET) is obsolete in 2.5. Please fix!)
endif
ifdef L_TARGET
ifneq ($(L_TARGET),lib.a)
$(warning kbuild: $(obj)/Makefile - L_TARGET := $(L_TARGET) target shall be renamed to lib.a. Please fix!)
endif
endif
ifdef list-multi
$(warning kbuild: $(obj)/Makefile - list-multi := $(list-multi) is obsolete in 2.5. Please fix!)
endif
ifndef obj
$(warning kbuild: Rules.make is included improperly)
endif
# Some paths for the Makefiles to use
# ---------------------------------------------------------------------------
# Usage:
#
# $(obj)/target.o : target.o in the build dir
# $(src)/target.c : target.c in the source dir
# $(objtree)/include/linux/version.h : Some file relative to the build
# dir root
# $(srctree)/include/linux/module.h : Some file relative to the source
# dir root
#
# $(obj) and $(src) can only be used in the section after
# include $(TOPDIR)/Rules.make, i.e for generated files and the like.
# Intentionally.
#
# We don't support separate source / object yet, so these are just
# placeholders for now
src := $(obj)
# Figure out what we need to build from the various variables
# ===========================================================================
# When an object is listed to be built compiled-in and modular,
# only build the compiled-in version
obj-m := $(filter-out $(obj-y),$(obj-m))
# Handle objects in subdirs
# ---------------------------------------------------------------------------
# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o
# and add the directory to the list of dirs to descend into: $(subdir-y)
# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
# and add the directory to the list of dirs to descend into: $(subdir-m)
__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
subdir-y += $(__subdir-y)
__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
subdir-m += $(__subdir-m)
__subdir-n := $(patsubst %/,%,$(filter %/, $(obj-n)))
subdir-n += $(__subdir-n)
__subdir- := $(patsubst %/,%,$(filter %/, $(obj-)))
subdir- += $(__subdir-)
obj-y := $(patsubst %/, %/built-in.o, $(obj-y))
obj-m := $(filter-out %/, $(obj-m))
# Subdirectories we need to descend into
subdir-ym := $(sort $(subdir-y) $(subdir-m))
subdir-ymn := $(sort $(subdir-ym) $(subdir-n) $(subdir-))
# export.o is never a composite object, since $(export-objs) has a
# fixed meaning (== objects which EXPORT_SYMBOL())
__obj-y = $(filter-out export.o,$(obj-y))
__obj-m = $(filter-out export.o,$(obj-m))
# if $(foo-objs) exists, foo.o is a composite object
multi-used-y := $(sort $(foreach m,$(__obj-y), $(if $($(m:.o=-objs)), $(m))))
multi-used-m := $(sort $(foreach m,$(__obj-m), $(if $($(m:.o=-objs)), $(m))))
# Build list of the parts of our composite objects, our composite
# objects depend on those (obviously)
multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)))
multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)))
# $(subdir-obj-y) is the list of objects in $(obj-y) which do not live
# in the local directory
subdir-obj-y := $(foreach o,$(obj-y),$(if $(filter-out $(o),$(notdir $(o))),$(o)))
# Replace multi-part objects by their individual parts, look at local dir only
real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $($(m:.o=-objs)),$($(m:.o=-objs)),$(m))) $(EXTRA_TARGETS)
real-objs-m := $(foreach m, $(obj-m), $(if $($(m:.o=-objs)),$($(m:.o=-objs)),$(m)))
# Only build module versions for files which are selected to be built
export-objs := $(filter $(export-objs),$(real-objs-y) $(real-objs-m))
host-progs-single := $(foreach m,$(host-progs),$(if $($(m)-objs),,$(m)))
host-progs-multi := $(foreach m,$(host-progs),$(if $($(m)-objs),$(m)))
host-progs-multi-objs := $(foreach m,$(host-progs-multi),$($(m)-objs))
# Add subdir path
EXTRA_TARGETS := $(addprefix $(obj)/,$(EXTRA_TARGETS))
obj-y := $(addprefix $(obj)/,$(obj-y))
obj-m := $(addprefix $(obj)/,$(obj-m))
export-objs := $(addprefix $(obj)/,$(export-objs))
subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
real-objs-y := $(addprefix $(obj)/,$(real-objs-y))
real-objs-m := $(addprefix $(obj)/,$(real-objs-m))
multi-used-y := $(addprefix $(obj)/,$(multi-used-y))
multi-used-m := $(addprefix $(obj)/,$(multi-used-m))
multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y))
multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
subdir-ymn := $(addprefix $(obj)/,$(subdir-ymn))
clean-files := $(addprefix $(obj)/,$(clean-files))
host-progs := $(addprefix $(obj)/,$(host-progs))
host-progs-single := $(addprefix $(obj)/,$(host-progs-single))
host-progs-multi := $(addprefix $(obj)/,$(host-progs-multi))
host-progs-multi-objs := $(addprefix $(obj)/,$(host-progs-multi-objs))
# The temporary file to save gcc -MD generated dependencies must not
# contain a comma
depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
# We're called for one of four purposes:
# o subdirclean: Delete intermidiate files in the current directory
# o fastdep: build module version files (.ver) for $(export-objs) in
# the current directory
# o modules_install: install the modules in the current directory
# o build: When no target is given, first_rule is the default and
# will build the built-in and modular objects in this dir
# (or a subset thereof, depending on $(KBUILD_MODULES),$(KBUILD_BUILTIN)
# When targets are given directly (like foo.o), we just build these
# targets (That happens when someone does make some/dir/foo.[ois])
ifeq ($(MAKECMDGOALS),subdirclean)
__clean-files := $(wildcard $(EXTRA_TARGETS) $(host-progs) $(clean-files))
subdirclean: $(subdir-ymn)
ifneq ($(strip $(__clean-files) $(clean-rule)),)
rm -f $(__clean-files)
$(clean-rule)
else
@:
endif
else
ifeq ($(MAKECMDGOALS),fastdep)
include scripts/Makefile.modver
else # ! fastdep
ifeq ($(MAKECMDGOALS),modules_install)
include scripts/Makefile.modinst
else # ! modules_install
include scripts/Makefile.build
endif # ! subdirclean
endif # ! modules_install
endif # ! fastdep
# Shipped files
# ===========================================================================
quiet_cmd_shipped = SHIPPED $@
cmd_shipped = cat $< > $@
%:: %_shipped
$(call cmd,shipped)
# Commands useful for building a boot image
# ===========================================================================
#
# Use as following:
#
# target: source(s) FORCE
# $(if_changed,ld/objcopy/gzip)
#
# and add target to EXTRA_TARGETS so that we know we have to
# read in the saved command line
# Linking
# ---------------------------------------------------------------------------
quiet_cmd_ld = LD $@
cmd_ld = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_$(@F)) \
$(filter-out FORCE,$^) -o $@
# Objcopy
# ---------------------------------------------------------------------------
quiet_cmd_objcopy = OBJCOPY $@
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $< $@
# Gzip
# ---------------------------------------------------------------------------
quiet_cmd_gzip = GZIP $@
cmd_gzip = gzip -f -9 < $< > $@
# ===========================================================================
# Generic stuff
# ===========================================================================
# Descending
# ---------------------------------------------------------------------------
.PHONY: $(subdir-ymn)
$(subdir-ymn):
+@$(call descend,$@,$(MAKECMDGOALS))
# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
.PHONY: FORCE
FORCE:
#
# This sets version suffixes on exported symbols
# Separate the object into "normal" objects and "exporting" objects
# Exporting objects are: all objects that define symbol tables
#
# ---------------------------------------------------------------------------
# Check if command line has changed
# Usage:
# normally one uses rules like
#
# %.o: %.c
# <command line>
#
# However, these only rebuild the target when the source has changed,
# but not when e.g. the command or the flags on the command line changed.
#
# This extension allows to do the following:
#
# command = <command line>
#
# %.o: %.c dummy
# $(call if_changed,command)
#
# which will make sure to rebuild the target when either its prerequisites
# change or the command line changes
#
# The magic works as follows:
# The addition of dummy to the dependencies causes the rule for rebuilding
# to be always executed. However, the if_changed function will generate
# an empty command when
# o none of the prequesites changed (i.e $? is empty)
# o the command line did not change (we compare the old command line,
# which is saved in .<target>.o, to the current command line using
# the two filter-out commands)
# Read all saved command lines and dependencies for the $(targets) we
# may be building above, using $(if_changed{,_dep}). As an
# optimization, we don't need to read them if the target does not
# exist, we will rebuild anyway in that case.
targets := $(wildcard $(sort $(targets)))
cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
ifneq ($(cmd_files),)
include $(cmd_files)
endif
# function to only execute the passed command if necessary
if_changed = $(if $(strip $? \
$(filter-out $(cmd_$(1)),$(cmd_$@))\
$(filter-out $(cmd_$@),$(cmd_$(1)))),\
@set -e; \
$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))';) \
$(cmd_$(1)); \
echo 'cmd_$@ := $(cmd_$(1))' > $(@D)/.$(@F).cmd)
# execute the command and also postprocess generated .d dependencies
# file
if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
$(filter-out $(cmd_$(1)),$(cmd_$@))\
$(filter-out $(cmd_$@),$(cmd_$(1)))),\
@set -e; \
$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))';) \
$(cmd_$(1)); \
scripts/fixdep $(depfile) $@ '$(cmd_$(1))' > $(@D)/.$(@F).tmp; \
rm -f $(depfile); \
mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
# Usage: $(call if_changed_rule,foo)
# will check if $(cmd_foo) changed, or any of the prequisites changed,
# and if so will execute $(rule_foo)
if_changed_rule = $(if $(strip $? \
$(filter-out $(cmd_$(1)),$(cmd_$@))\
$(filter-out $(cmd_$@),$(cmd_$(1)))),\
@set -e; \
mkdir -p $(dir $@); \
$(rule_$(1)))
# If quiet is set, only print short version of command
cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
# do_cmd is a shorthand used to support both compressed, verbose
# and silent output in a single line.
# Compared to cmd described avobe, do_cmd does no rely on any variables
# previously assigned a value.
#
# Usage $(call do_cmd,CMD $@,cmd_to_execute bla bla)
# Example:
# $(call do_cmd,CP $@,cp -b $< $@)
# make -s => nothing will be printed
# make KBUILD_VERBOSE=1 => cp -b path/to/src.file path/to/dest.file
# make KBUILD_VERBOSE=0 => CP path/to/dest.file
define do_cmd
@$(if $(filter quiet_,$(quiet)), echo ' $(1)' &&,
$(if $(filter silent_,$(quiet)),,
echo "$(2)" &&)) \
$(2)
endef
# $(call descend,<dir>,<target>)
# Recursively call a sub-make in <dir> with target <target>
ifeq ($(KBUILD_VERBOSE),1)
descend = echo '$(MAKE) -f $(1)/Makefile $(2)';
endif
descend += $(MAKE) -f $(1)/Makefile obj=$(1) $(2)
endif
arch/i386/Makefile
View file @ e846b41a
......@@ -88,6 +88,6 @@ install: vmlinux
+@$(call makeboot,BOOTIMAGE=$(BOOTIMAGE) install)
archclean:
$(MAKE) -rR -f scripts/Makefile.clean obj=arch/i386/boot
@$(MAKE) -f scripts/Makefile.clean obj=arch/i386/boot
archmrproper:
init/Makefile
View file @ e846b41a
......@@ -11,13 +11,13 @@ include $(TOPDIR)/Rules.make
# dependencies on generated files need to be listed explicitly
$(obj)/version.o: $(obj)/../include/linux/compile.h
$(obj)/version.o: include/linux/compile.h
# compile.h changes depending on hostname, generation number, etc,
# so we regenerate it always.
# mkcompile_h will make sure to only update the
# actual file if its content has changed.
$(obj)/../include/linux/compile.h: FORCE
include/linux/compile.h: FORCE
@echo -n ' Generating $@'
@sh $(srctree)/scripts/mkcompile_h $@ "$(ARCH)" "$(CONFIG_SMP)" "$(CC) $(CFLAGS)"
scripts/Makefile.build
View file @ e846b41a
......@@ -2,6 +2,131 @@
# Building
# ==========================================================================
src := $(obj)
no-rules.make := 1
.PHONY: __build
__build:
include .config
include $(obj)/Makefile
# Standard vars
comma := ,
empty :=
space := $(empty) $(empty)
# bug traps
# ===========================================================================
ifdef O_TARGET
$(error kbuild: $(obj)/Makefile - Usage of O_TARGET := $(O_TARGET) is obsolete in 2.5. Please fix!)
endif
ifdef L_TARGET
ifneq ($(L_TARGET),lib.a)
$(warning kbuild: $(obj)/Makefile - L_TARGET := $(L_TARGET) target shall be renamed to lib.a. Please fix!)
endif
endif
ifdef list-multi
$(warning kbuild: $(obj)/Makefile - list-multi := $(list-multi) is obsolete in 2.5. Please fix!)
endif
ifndef obj
$(warning kbuild: Rules.make is included improperly)
endif
# Figure out what we need to build from the various variables
# ===========================================================================
# When an object is listed to be built compiled-in and modular,
# only build the compiled-in version
obj-m := $(filter-out $(obj-y),$(obj-m))
# Handle objects in subdirs
# ---------------------------------------------------------------------------
# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o
# and add the directory to the list of dirs to descend into: $(subdir-y)
# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
# and add the directory to the list of dirs to descend into: $(subdir-m)
__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
subdir-y += $(__subdir-y)
__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
subdir-m += $(__subdir-m)
__subdir-n := $(patsubst %/,%,$(filter %/, $(obj-n)))
subdir-n += $(__subdir-n)
__subdir- := $(patsubst %/,%,$(filter %/, $(obj-)))
subdir- += $(__subdir-)
obj-y := $(patsubst %/, %/built-in.o, $(obj-y))
obj-m := $(filter-out %/, $(obj-m))
# Subdirectories we need to descend into
subdir-ym := $(sort $(subdir-y) $(subdir-m))
subdir-ymn := $(sort $(subdir-ym) $(subdir-n) $(subdir-))
# export.o is never a composite object, since $(export-objs) has a
# fixed meaning (== objects which EXPORT_SYMBOL())
__obj-y = $(filter-out export.o,$(obj-y))
__obj-m = $(filter-out export.o,$(obj-m))
# if $(foo-objs) exists, foo.o is a composite object
multi-used-y := $(sort $(foreach m,$(__obj-y), $(if $($(m:.o=-objs)), $(m))))
multi-used-m := $(sort $(foreach m,$(__obj-m), $(if $($(m:.o=-objs)), $(m))))
# Build list of the parts of our composite objects, our composite
# objects depend on those (obviously)
multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)))
multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)))
# $(subdir-obj-y) is the list of objects in $(obj-y) which do not live
# in the local directory
subdir-obj-y := $(foreach o,$(obj-y),$(if $(filter-out $(o),$(notdir $(o))),$(o)))
# Replace multi-part objects by their individual parts, look at local dir only
real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $($(m:.o=-objs)),$($(m:.o=-objs)),$(m))) $(EXTRA_TARGETS)
real-objs-m := $(foreach m, $(obj-m), $(if $($(m:.o=-objs)),$($(m:.o=-objs)),$(m)))
# Only build module versions for files which are selected to be built
export-objs := $(filter $(export-objs),$(real-objs-y) $(real-objs-m))
host-progs-single := $(foreach m,$(host-progs),$(if $($(m)-objs),,$(m)))
host-progs-multi := $(foreach m,$(host-progs),$(if $($(m)-objs),$(m)))
host-progs-multi-objs := $(foreach m,$(host-progs-multi),$($(m)-objs))
# Add subdir path
EXTRA_TARGETS := $(addprefix $(obj)/,$(EXTRA_TARGETS))
obj-y := $(addprefix $(obj)/,$(obj-y))
obj-m := $(addprefix $(obj)/,$(obj-m))
export-objs := $(addprefix $(obj)/,$(export-objs))
subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
real-objs-y := $(addprefix $(obj)/,$(real-objs-y))
real-objs-m := $(addprefix $(obj)/,$(real-objs-m))
multi-used-y := $(addprefix $(obj)/,$(multi-used-y))
multi-used-m := $(addprefix $(obj)/,$(multi-used-m))
multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y))
multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
subdir-ymn := $(addprefix $(obj)/,$(subdir-ymn))
clean-files := $(addprefix $(obj)/,$(clean-files))
host-progs := $(addprefix $(obj)/,$(host-progs))
host-progs-single := $(addprefix $(obj)/,$(host-progs-single))
host-progs-multi := $(addprefix $(obj)/,$(host-progs-multi))
host-progs-multi-objs := $(addprefix $(obj)/,$(host-progs-multi-objs))
# The temporary file to save gcc -MD generated dependencies must not
# contain a comma
depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
# ===========================================================================
# If a Makefile does not define a L_TARGET, link an object called "built-in.o"
ifdef L_TARGET
......@@ -10,9 +135,9 @@ else
O_TARGET := $(obj)/built-in.o
endif
first_rule: $(if $(KBUILD_BUILTIN),$(O_TARGET) $(L_TARGET) $(EXTRA_TARGETS)) \
$(if $(KBUILD_MODULES),$(obj-m)) \
$(subdir-ym)
__build: $(if $(KBUILD_BUILTIN),$(O_TARGET) $(L_TARGET) $(EXTRA_TARGETS)) \
$(if $(KBUILD_MODULES),$(obj-m)) \
$(subdir-ym)
@:
# Compile C sources (.c)
......@@ -35,25 +160,25 @@ c_flags = -Wp,-MD,$(depfile) $(CFLAGS) $(NOSTDINC_FLAGS) \
-DKBUILD_BASENAME=$(subst $(comma),_,$(subst -,_,$(*F))) \
$(export_flags)
quiet_cmd_cc_s_c = CC $(echo_target)
quiet_cmd_cc_s_c = CC $@
cmd_cc_s_c = $(CC) $(c_flags) -S -o $@ $<
%.s: %.c FORCE
$(call if_changed_dep,cc_s_c)
quiet_cmd_cc_i_c = CPP $(echo_target)
quiet_cmd_cc_i_c = CPP $@
cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $<
%.i: %.c FORCE
$(call if_changed_dep,cc_i_c)
quiet_cmd_cc_o_c = CC $(echo_target)
quiet_cmd_cc_o_c = CC $@
cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
%.o: %.c FORCE
$(call if_changed_dep,cc_o_c)
quiet_cmd_cc_lst_c = MKLST $(echo_target)
quiet_cmd_cc_lst_c = MKLST $@
cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && sh scripts/makelst $*.o System.map $(OBJDUMP) > $@
%.lst: %.c FORCE
......@@ -70,13 +195,13 @@ $(real-objs-m:.o=.s): modkern_aflags := $(AFLAGS_MODULE)
a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(NOSTDINC_FLAGS) \
$(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
quiet_cmd_as_s_S = CPP $(echo_target)
quiet_cmd_as_s_S = CPP $@
cmd_as_s_S = $(CPP) $(a_flags) -o $@ $<
%.s: %.S FORCE
$(call if_changed_dep,as_s_S)
quiet_cmd_as_o_S = AS $(echo_target)
quiet_cmd_as_o_S = AS $@
cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
%.o: %.S FORCE
......@@ -94,7 +219,7 @@ $(sort $(subdir-obj-y)): $(subdir-ym) ;
# Rule to compile a set of .o files into one .o file
#
ifdef O_TARGET
quiet_cmd_link_o_target = LD $(echo_target)
quiet_cmd_link_o_target = LD $@
# If the list of objects to link is empty, just create an empty O_TARGET
cmd_link_o_target = $(if $(strip $(obj-y)),\
$(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) -r -o $@ $(filter $(obj-y), $^),\
......@@ -110,7 +235,7 @@ endif # O_TARGET
# Rule to compile a set of .o files into one .a file
#
ifdef L_TARGET
quiet_cmd_link_l_target = AR $(echo_target)
quiet_cmd_link_l_target = AR $@
cmd_link_l_target = rm -f $@; $(AR) $(EXTRA_ARFLAGS) rcs $@ $(obj-y)
$(L_TARGET): $(obj-y) FORCE
......@@ -123,7 +248,7 @@ endif
# Rule to link composite objects
#
quiet_cmd_link_multi = LD $(echo_target)
quiet_cmd_link_multi = LD $@
cmd_link_multi = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) -r -o $@ $(filter $(addprefix $(obj)/,$($(subst $(obj)/,,$(@:.o=-objs)))),$^)
# We would rather have a list of rules like
......@@ -141,7 +266,7 @@ targets += $(multi-used-y) $(multi-used-m)
# Compile programs on the host
# ===========================================================================
quiet_cmd_host_cc__c = HOSTCC $(echo_target)
quiet_cmd_host_cc__c = HOSTCC $@
cmd_host_cc__c = $(HOSTCC) -Wp,-MD,$(depfile) \
$(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
$(HOST_LOADLIBES) -o $@ $<
......@@ -149,14 +274,14 @@ cmd_host_cc__c = $(HOSTCC) -Wp,-MD,$(depfile) \
$(host-progs-single): %: %.c FORCE
$(call if_changed_dep,host_cc__c)
quiet_cmd_host_cc_o_c = HOSTCC $(echo_target)
quiet_cmd_host_cc_o_c = HOSTCC $@
cmd_host_cc_o_c = $(HOSTCC) -Wp,-MD,$(depfile) \
$(HOSTCFLAGS) $(HOST_EXTRACFLAGS) -c -o $@ $<
$(host-progs-multi-objs): %.o: %.c FORCE
$(call if_changed_dep,host_cc_o_c)
quiet_cmd_host_cc__o = HOSTLD $(echo_target)
quiet_cmd_host_cc__o = HOSTLD $@
cmd_host_cc__o = $(HOSTCC) $(HOSTLDFLAGS) -o $@ $(addprefix $(obj)/,$($(subst $(obj)/,,$@)-objs)) \
$(HOST_LOADLIBES)
......@@ -165,3 +290,133 @@ $(host-progs-multi): %: $(host-progs-multi-objs) FORCE
targets += $(host-progs-single) $(host-progs-multi-objs) $(host-progs-multi)
# Shipped files
# ===========================================================================
quiet_cmd_shipped = SHIPPED $@
cmd_shipped = cat $< > $@
%:: %_shipped
$(call cmd,shipped)
# Commands useful for building a boot image
# ===========================================================================
#
# Use as following:
#
# target: source(s) FORCE
# $(if_changed,ld/objcopy/gzip)
#
# and add target to EXTRA_TARGETS so that we know we have to
# read in the saved command line
# Linking
# ---------------------------------------------------------------------------
quiet_cmd_ld = LD $@
cmd_ld = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_$(@F)) \
$(filter-out FORCE,$^) -o $@
# Objcopy
# ---------------------------------------------------------------------------
quiet_cmd_objcopy = OBJCOPY $@
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $< $@
# Gzip
# ---------------------------------------------------------------------------
quiet_cmd_gzip = GZIP $@
cmd_gzip = gzip -f -9 < $< > $@
# ===========================================================================
# Generic stuff
# ===========================================================================
# Descending
# ---------------------------------------------------------------------------
.PHONY: $(subdir-ym)
$(subdir-ym):
$(Q)$(MAKE) -f scripts/Makefile.build obj=$@
# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
.PHONY: FORCE
FORCE:
# Read all saved command lines and dependencies for the $(targets) we
# may be building above, using $(if_changed{,_dep}). As an
# optimization, we don't need to read them if the target does not
# exist, we will rebuild anyway in that case.
targets := $(wildcard $(sort $(targets)))
cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
ifneq ($(cmd_files),)
include $(cmd_files)
endif
# function to only execute the passed command if necessary
if_changed = $(if $(strip $? \
$(filter-out $(cmd_$(1)),$(cmd_$@))\
$(filter-out $(cmd_$@),$(cmd_$(1)))),\
@set -e; \
$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))';) \
$(cmd_$(1)); \
echo 'cmd_$@ := $(cmd_$(1))' > $(@D)/.$(@F).cmd)
# execute the command and also postprocess generated .d dependencies
# file
if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
$(filter-out $(cmd_$(1)),$(cmd_$@))\
$(filter-out $(cmd_$@),$(cmd_$(1)))),\
@set -e; \
$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))';) \
$(cmd_$(1)); \
scripts/fixdep $(depfile) $@ '$(cmd_$(1))' > $(@D)/.$(@F).tmp; \
rm -f $(depfile); \
mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
# Usage: $(call if_changed_rule,foo)
# will check if $(cmd_foo) changed, or any of the prequisites changed,
# and if so will execute $(rule_foo)
if_changed_rule = $(if $(strip $? \
$(filter-out $(cmd_$(1)),$(cmd_$@))\
$(filter-out $(cmd_$@),$(cmd_$(1)))),\
@set -e; \
mkdir -p $(dir $@); \
$(rule_$(1)))
# If quiet is set, only print short version of command
cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
# do_cmd is a shorthand used to support both compressed, verbose
# and silent output in a single line.
# Compared to cmd described avobe, do_cmd does no rely on any variables
# previously assigned a value.
#
# Usage $(call do_cmd,CMD $@,cmd_to_execute bla bla)
# Example:
# $(call do_cmd,CP $@,cp -b $< $@)
# make -s => nothing will be printed
# make KBUILD_VERBOSE=1 => cp -b path/to/src.file path/to/dest.file
# make KBUILD_VERBOSE=0 => CP path/to/dest.file
define do_cmd
@$(if $(filter quiet_,$(quiet)), echo ' $(1)' &&,
$(if $(filter silent_,$(quiet)),,
echo "$(2)" &&)) \
$(2)
endef
# $(call descend,<dir>,<target>)
# Recursively call a sub-make in <dir> with target <target>
descend = $(Q)$(MAKE) -f scripts/Makefile.build obj=$(1) $(2)
scripts/Makefile.clean
View file @ e846b41a
......@@ -39,8 +39,8 @@ subdir-ymn := $(addprefix $(obj)/,$(subdir-ymn))
__clean-files := $(wildcard $(EXTRA_TARGETS) $(host-progs) $(clean-files))
quiet_cmd_clean = CLEAN $(__cleanfiles)
cmd_clean = rm -f $(__clean-files); $(clean-rule)
quiet_cmd_clean = CLEAN $(obj)
cmd_clean = rm -f $(__clean-files); $(clean-rule)
__clean: $(subdir-ymn)
ifneq ($(strip $(__clean-files) $(clean-rule)),)
......@@ -58,7 +58,7 @@ endif
.PHONY: $(subdir-ymn)
$(subdir-ymn):
$(Q)$(MAKE) -rR -f scripts/Makefile.clean obj=$@
$(Q)$(MAKE) -f scripts/Makefile.clean obj=$@
# If quiet is set, only print short version of command
......
scripts/Makefile.modver
View file @ e846b41a
......@@ -2,12 +2,110 @@
# Module versions
# ===========================================================================
src := $(obj)
no-rules.make := 1
.PHONY: modver
modver:
include .config
include $(obj)/Makefile
# Figure out what we need to build from the various variables
# ===========================================================================
# When an object is listed to be built compiled-in and modular,
# only build the compiled-in version
obj-m := $(filter-out $(obj-y),$(obj-m))
# Handle objects in subdirs
# ---------------------------------------------------------------------------
# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o
# and add the directory to the list of dirs to descend into: $(subdir-y)
# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
# and add the directory to the list of dirs to descend into: $(subdir-m)
__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
subdir-y += $(__subdir-y)
__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
subdir-m += $(__subdir-m)
__subdir-n := $(patsubst %/,%,$(filter %/, $(obj-n)))
subdir-n += $(__subdir-n)
__subdir- := $(patsubst %/,%,$(filter %/, $(obj-)))
subdir- += $(__subdir-)
obj-y := $(patsubst %/, %/built-in.o, $(obj-y))
obj-m := $(filter-out %/, $(obj-m))
# Subdirectories we need to descend into
subdir-ym := $(sort $(subdir-y) $(subdir-m))
subdir-ymn := $(sort $(subdir-ym) $(subdir-n) $(subdir-))
# export.o is never a composite object, since $(export-objs) has a
# fixed meaning (== objects which EXPORT_SYMBOL())
__obj-y = $(filter-out export.o,$(obj-y))
__obj-m = $(filter-out export.o,$(obj-m))
# if $(foo-objs) exists, foo.o is a composite object
multi-used-y := $(sort $(foreach m,$(__obj-y), $(if $($(m:.o=-objs)), $(m))))
multi-used-m := $(sort $(foreach m,$(__obj-m), $(if $($(m:.o=-objs)), $(m))))
# Build list of the parts of our composite objects, our composite
# objects depend on those (obviously)
multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)))
multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)))
# $(subdir-obj-y) is the list of objects in $(obj-y) which do not live
# in the local directory
subdir-obj-y := $(foreach o,$(obj-y),$(if $(filter-out $(o),$(notdir $(o))),$(o)))
# Replace multi-part objects by their individual parts, look at local dir only
real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $($(m:.o=-objs)),$($(m:.o=-objs)),$(m))) $(EXTRA_TARGETS)
real-objs-m := $(foreach m, $(obj-m), $(if $($(m:.o=-objs)),$($(m:.o=-objs)),$(m)))
# Only build module versions for files which are selected to be built
export-objs := $(filter $(export-objs),$(real-objs-y) $(real-objs-m))
host-progs-single := $(foreach m,$(host-progs),$(if $($(m)-objs),,$(m)))
host-progs-multi := $(foreach m,$(host-progs),$(if $($(m)-objs),$(m)))
host-progs-multi-objs := $(foreach m,$(host-progs-multi),$($(m)-objs))
# Add subdir path
EXTRA_TARGETS := $(addprefix $(obj)/,$(EXTRA_TARGETS))
obj-y := $(addprefix $(obj)/,$(obj-y))
obj-m := $(addprefix $(obj)/,$(obj-m))
export-objs := $(addprefix $(obj)/,$(export-objs))
subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
real-objs-y := $(addprefix $(obj)/,$(real-objs-y))
real-objs-m := $(addprefix $(obj)/,$(real-objs-m))
multi-used-y := $(addprefix $(obj)/,$(multi-used-y))
multi-used-m := $(addprefix $(obj)/,$(multi-used-m))
multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y))
multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
subdir-ymn := $(addprefix $(obj)/,$(subdir-ymn))
clean-files := $(addprefix $(obj)/,$(clean-files))
host-progs := $(addprefix $(obj)/,$(host-progs))
host-progs-single := $(addprefix $(obj)/,$(host-progs-single))
host-progs-multi := $(addprefix $(obj)/,$(host-progs-multi))
host-progs-multi-objs := $(addprefix $(obj)/,$(host-progs-multi-objs))
# The temporary file to save gcc -MD generated dependencies must not
# contain a comma
depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
# ===========================================================================
ifeq ($(strip $(export-objs)),)
# If we don't export any symbols in this dir, just descend
# ---------------------------------------------------------------------------
fastdep: $(subdir-ym)
modver: $(subdir-ym)
@:
else
......@@ -55,7 +153,7 @@ cmd_cc_ver_c = $(CPP) $(c_flags) $< | $(GENKSYMS) $(genksyms_smp_prefix) \
# o If the $(CPP) fails, we won't notice because it's output is piped
# to $(GENKSYMS) which does not fail. We recognize this case by
# looking if the generated $(depfile) exists, though.
# o If the .ver file changed, touch modversions.h, which is our maker
# o If the .ver file changed, touch modversions.h, which is our marker
# of any changed .ver files.
# o Move command line and deps into their normal .*.cmd place.
......@@ -72,14 +170,63 @@ define rule_cc_ver_c
mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd
endef
targets := $(addprefix $(MODVERDIR)/,$(export-objs:.o=.ver))
$(MODVERDIR)/%.ver: %.c FORCE
@$(call if_changed_rule,cc_ver_c)
targets := $(addprefix $(MODVERDIR)/,$(export-objs:.o=.ver))
fastdep: $(targets) $(subdir-ym)
modver: $(targets) $(subdir-ym)
@mkdir -p $(dir $(addprefix .tmp_export-objs/modules/,$(export-objs:.o=.ver)))
@touch $(addprefix .tmp_export-objs/modules/,$(export-objs:.o=.ver))
endif # export-objs
# Shipped files
# ===========================================================================
quiet_cmd_shipped = SHIPPED $@
cmd_shipped = cat $< > $@
%:: %_shipped
$(call cmd,shipped)
# ===========================================================================
# Generic stuff
# ===========================================================================
# Descending
# ---------------------------------------------------------------------------
.PHONY: $(subdir-ym)
$(subdir-ym):
$(Q)$(MAKE) -f scripts/Makefile.modver obj=$@
# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
.PHONY: FORCE
FORCE:
# Read all saved command lines and dependencies for the $(targets) we
# may be building above, using $(if_changed{,_dep}). As an
# optimization, we don't need to read them if the target does not
# exist, we will rebuild anyway in that case.
targets := $(wildcard $(sort $(targets)))
cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
ifneq ($(cmd_files),)
include $(cmd_files)
endif
# Usage: $(call if_changed_rule,foo)
# will check if $(cmd_foo) changed, or any of the prequisites changed,
# and if so will execute $(rule_foo)
if_changed_rule = $(if $(strip $? \
$(filter-out $(cmd_$(1)),$(cmd_$@))\
$(filter-out $(cmd_$@),$(cmd_$(1)))),\
@set -e; \
mkdir -p $(dir $@); \
$(rule_$(1)))
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