Rules.make
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:9k
- #
- # This file contains rules which are shared between multiple Makefiles.
- #
- #
- # False targets.
- #
- .PHONY: dummy
- #
- # Special variables which should not be exported
- #
- unexport EXTRA_AFLAGS
- unexport EXTRA_CFLAGS
- unexport EXTRA_LDFLAGS
- unexport EXTRA_ARFLAGS
- unexport SUBDIRS
- unexport SUB_DIRS
- unexport ALL_SUB_DIRS
- unexport MOD_SUB_DIRS
- unexport O_TARGET
- unexport ALL_MOBJS
- unexport obj-y
- unexport obj-m
- unexport obj-n
- unexport obj-
- unexport export-objs
- unexport subdir-y
- unexport subdir-m
- unexport subdir-n
- unexport subdir-
- comma := ,
- EXTRA_CFLAGS_nostdinc := $(EXTRA_CFLAGS) $(kbuild_2_4_nostdinc)
- #
- # Get things started.
- #
- first_rule: sub_dirs
- $(MAKE) all_targets
- both-m := $(filter $(mod-subdirs), $(subdir-y))
- SUB_DIRS := $(subdir-y)
- MOD_SUB_DIRS := $(sort $(subdir-m) $(both-m))
- ALL_SUB_DIRS := $(sort $(subdir-y) $(subdir-m) $(subdir-n) $(subdir-))
- #
- # Common rules
- #
- %.s: %.c
- $(CC) $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -DKBUILD_BASENAME=$(subst $(comma),_,$(subst -,_,$(*F))) $(CFLAGS_$@) -S $< -o $@
- %.i: %.c
- $(CPP) $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -DKBUILD_BASENAME=$(subst $(comma),_,$(subst -,_,$(*F))) $(CFLAGS_$@) $< > $@
- %.o: %.c
- $(CC) $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -DKBUILD_BASENAME=$(subst $(comma),_,$(subst -,_,$(*F))) $(CFLAGS_$@) -c -o $@ $<
- @ (
- echo 'ifeq ($(strip $(subst $(comma),:,$(CFLAGS) $(EXTRA_CFLAGS_nostdinc) $(CFLAGS_$@))),$$(strip $$(subst $$(comma),:,$$(CFLAGS) $$(EXTRA_CFLAGS_nostdinc) $$(CFLAGS_$@))))' ;
- echo 'FILES_FLAGS_UP_TO_DATE += $@' ;
- echo 'endif'
- ) > $(dir $@)/.$(notdir $@).flags
- %.o: %.s
- $(AS) $(AFLAGS) $(EXTRA_CFLAGS) -o $@ $<
- # Old makefiles define their own rules for compiling .S files,
- # but these standard rules are available for any Makefile that
- # wants to use them. Our plan is to incrementally convert all
- # the Makefiles to these standard rules. -- rmk, mec
- ifdef USE_STANDARD_AS_RULE
- %.s: %.S
- $(CPP) $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$@) $< > $@
- %.o: %.S
- $(CC) $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$@) -c -o $@ $<
- endif
- %.lst: %.c
- $(CC) $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) $(CFLAGS_$@) -g -c -o $*.o $<
- $(TOPDIR)/scripts/makelst $* $(TOPDIR) $(OBJDUMP)
- #
- #
- #
- all_targets: $(O_TARGET) $(L_TARGET)
- #
- # Rule to compile a set of .o files into one .o file
- #
- ifdef O_TARGET
- $(O_TARGET): $(obj-y)
- rm -f $@
- ifneq "$(strip $(obj-y))" ""
- $(LD) $(EXTRA_LDFLAGS) -r -o $@ $(filter $(obj-y), $^)
- else
- $(AR) rcs $@
- endif
- @ (
- echo 'ifeq ($(strip $(subst $(comma),:,$(EXTRA_LDFLAGS) $(obj-y))),$$(strip $$(subst $$(comma),:,$$(EXTRA_LDFLAGS) $$(obj-y))))' ;
- echo 'FILES_FLAGS_UP_TO_DATE += $@' ;
- echo 'endif'
- ) > $(dir $@)/.$(notdir $@).flags
- endif # O_TARGET
- #
- # Rule to compile a set of .o files into one .a file
- #
- ifdef L_TARGET
- $(L_TARGET): $(obj-y)
- rm -f $@
- $(AR) $(EXTRA_ARFLAGS) rcs $@ $(obj-y)
- @ (
- echo 'ifeq ($(strip $(subst $(comma),:,$(EXTRA_ARFLAGS) $(obj-y))),$$(strip $$(subst $$(comma),:,$$(EXTRA_ARFLAGS) $$(obj-y))))' ;
- echo 'FILES_FLAGS_UP_TO_DATE += $@' ;
- echo 'endif'
- ) > $(dir $@)/.$(notdir $@).flags
- endif
- #
- # This make dependencies quickly
- #
- fastdep: dummy
- $(TOPDIR)/scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -- $(wildcard *.[chS]) > .depend
- ifdef ALL_SUB_DIRS
- $(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
- endif
- ifdef _FASTDEP_ALL_SUB_DIRS
- $(patsubst %,_sfdep_%,$(_FASTDEP_ALL_SUB_DIRS)):
- $(MAKE) -C $(patsubst _sfdep_%,%,$@) fastdep
- endif
-
- #
- # A rule to make subdirectories
- #
- subdir-list = $(sort $(patsubst %,_subdir_%,$(SUB_DIRS)))
- sub_dirs: dummy $(subdir-list)
- ifdef SUB_DIRS
- $(subdir-list) : dummy
- $(MAKE) -C $(patsubst _subdir_%,%,$@)
- endif
- #
- # A rule to make modules
- #
- ALL_MOBJS = $(filter-out $(obj-y), $(obj-m))
- ifneq "$(strip $(ALL_MOBJS))" ""
- MOD_DESTDIR := $(shell $(CONFIG_SHELL) $(TOPDIR)/scripts/pathdown.sh)
- endif
- unexport MOD_DIRS
- MOD_DIRS := $(MOD_SUB_DIRS) $(MOD_IN_SUB_DIRS)
- ifneq "$(strip $(MOD_DIRS))" ""
- .PHONY: $(patsubst %,_modsubdir_%,$(MOD_DIRS))
- $(patsubst %,_modsubdir_%,$(MOD_DIRS)) : dummy
- $(MAKE) -C $(patsubst _modsubdir_%,%,$@) modules
- .PHONY: $(patsubst %,_modinst_%,$(MOD_DIRS))
- $(patsubst %,_modinst_%,$(MOD_DIRS)) : dummy
- $(MAKE) -C $(patsubst _modinst_%,%,$@) modules_install
- endif
- .PHONY: modules
- modules: $(ALL_MOBJS) dummy
- $(patsubst %,_modsubdir_%,$(MOD_DIRS))
- .PHONY: _modinst__
- _modinst__: dummy
- ifneq "$(strip $(ALL_MOBJS))" ""
- mkdir -p $(MODLIB)/kernel/$(MOD_DESTDIR)
- cp $(sort $(ALL_MOBJS)) $(MODLIB)/kernel/$(MOD_DESTDIR)
- endif
- .PHONY: modules_install
- modules_install: _modinst__
- $(patsubst %,_modinst_%,$(MOD_DIRS))
- #
- # A rule to do nothing
- #
- dummy:
- #
- # This is useful for testing
- #
- script:
- $(SCRIPT)
- #
- # 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
- #
- ifdef CONFIG_MODULES
- multi-used := $(filter $(list-multi), $(obj-y) $(obj-m))
- multi-objs := $(foreach m, $(multi-used), $($(basename $(m))-objs))
- active-objs := $(sort $(multi-objs) $(obj-y) $(obj-m))
- ifdef CONFIG_MODVERSIONS
- ifneq "$(strip $(export-objs))" ""
- MODINCL = $(TOPDIR)/include/linux/modules
- # The -w option (enable warnings) for genksyms will return here in 2.1
- # So where has it gone?
- #
- # Added the SMP separator to stop module accidents between uniprocessor
- # and SMP Intel boxes - AC - from bits by Michael Chastain
- #
- ifdef CONFIG_SMP
- genksyms_smp_prefix := -p smp_
- else
- genksyms_smp_prefix :=
- endif
- $(MODINCL)/%.ver: %.c
- @if [ ! -r $(MODINCL)/$*.stamp -o $(MODINCL)/$*.stamp -ot $< ]; then
- echo '$(CC) $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -E -D__GENKSYMS__ $<';
- echo '| $(GENKSYMS) $(genksyms_smp_prefix) -k $(VERSION).$(PATCHLEVEL).$(SUBLEVEL) > $@.tmp';
- $(CC) $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -E -D__GENKSYMS__ $<
- | $(GENKSYMS) $(genksyms_smp_prefix) -k $(VERSION).$(PATCHLEVEL).$(SUBLEVEL) > $@.tmp;
- if [ -r $@ ] && cmp -s $@ $@.tmp; then echo $@ is unchanged; rm -f $@.tmp;
- else echo mv $@.tmp $@; mv -f $@.tmp $@; fi;
- fi; touch $(MODINCL)/$*.stamp
-
- $(addprefix $(MODINCL)/,$(export-objs:.o=.ver)): $(TOPDIR)/include/linux/autoconf.h
- # updates .ver files but not modversions.h
- fastdep: $(addprefix $(MODINCL)/,$(export-objs:.o=.ver))
- # updates .ver files and modversions.h like before (is this needed?)
- dep: fastdep update-modverfile
- endif # export-objs
- # update modversions.h, but only if it would change
- update-modverfile:
- @(echo "#ifndef _LINUX_MODVERSIONS_H";
- echo "#define _LINUX_MODVERSIONS_H";
- echo "#include <linux/modsetver.h>";
- cd $(TOPDIR)/include/linux/modules;
- for f in *.ver; do
- if [ -f $$f ]; then echo "#include <linux/modules/$${f}>"; fi;
- done;
- echo "#endif";
- ) > $(TOPDIR)/include/linux/modversions.h.tmp
- @if [ -r $(TOPDIR)/include/linux/modversions.h ] && cmp -s $(TOPDIR)/include/linux/modversions.h $(TOPDIR)/include/linux/modversions.h.tmp; then
- echo $(TOPDIR)/include/linux/modversions.h was not updated;
- rm -f $(TOPDIR)/include/linux/modversions.h.tmp;
- else
- echo $(TOPDIR)/include/linux/modversions.h was updated;
- mv -f $(TOPDIR)/include/linux/modversions.h.tmp $(TOPDIR)/include/linux/modversions.h;
- fi
- $(active-objs): $(TOPDIR)/include/linux/modversions.h
- else
- $(TOPDIR)/include/linux/modversions.h:
- @echo "#include <linux/modsetver.h>" > $@
- endif # CONFIG_MODVERSIONS
- ifneq "$(strip $(export-objs))" ""
- $(export-objs): $(export-objs:.o=.c) $(TOPDIR)/include/linux/modversions.h
- $(CC) $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -DKBUILD_BASENAME=$(subst $(comma),_,$(subst -,_,$(*F))) $(CFLAGS_$@) -DEXPORT_SYMTAB -c $(@:.o=.c)
- @ (
- echo 'ifeq ($(strip $(subst $(comma),:,$(CFLAGS) $(EXTRA_CFLAGS_nostdinc) $(CFLAGS_$@) -DEXPORT_SYMTAB)),$$(strip $$(subst $$(comma),:,$$(CFLAGS) $$(EXTRA_CFLAGS_nostdinc) $$(CFLAGS_$@) -DEXPORT_SYMTAB)))' ;
- echo 'FILES_FLAGS_UP_TO_DATE += $@' ;
- echo 'endif'
- ) > $(dir $@)/.$(notdir $@).flags
- endif
- endif # CONFIG_MODULES
- #
- # include dependency files if they exist
- #
- ifneq ($(wildcard .depend),)
- include .depend
- endif
- ifneq ($(wildcard $(TOPDIR)/.hdepend),)
- include $(TOPDIR)/.hdepend
- endif
- #
- # Find files whose flags have changed and force recompilation.
- # For safety, this works in the converse direction:
- # every file is forced, except those whose flags are positively up-to-date.
- #
- FILES_FLAGS_UP_TO_DATE :=
- # For use in expunging commas from flags, which mung our checking.
- comma = ,
- FILES_FLAGS_EXIST := $(wildcard .*.flags)
- ifneq ($(FILES_FLAGS_EXIST),)
- include $(FILES_FLAGS_EXIST)
- endif
- FILES_FLAGS_CHANGED := $(strip
- $(filter-out $(FILES_FLAGS_UP_TO_DATE),
- $(O_TARGET) $(L_TARGET) $(active-objs)
- ))
- # A kludge: .S files don't get flag dependencies (yet),
- # because that will involve changing a lot of Makefiles. Also
- # suppress object files explicitly listed in $(IGNORE_FLAGS_OBJS).
- # This allows handling of assembly files that get translated into
- # multiple object files (see arch/ia64/lib/idiv.S, for example).
- FILES_FLAGS_CHANGED := $(strip
- $(filter-out $(patsubst %.S, %.o, $(wildcard *.S) $(IGNORE_FLAGS_OBJS)),
- $(FILES_FLAGS_CHANGED)))
- ifneq ($(FILES_FLAGS_CHANGED),)
- $(FILES_FLAGS_CHANGED): dummy
- endif