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#

# This file contains rules which are shared between multiple Makefiles.

#

#

# False targets.

#

.PHONY: dummy

#

# Special variables which should not be exported

#

unexport EXTRA_ASFLAGS

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 O_OBJS

unexport L_OBJS

unexport M_OBJS

unexport MI_OBJS

unexport ALL_MOBJS

# objects that export symbol tables

unexport OX_OBJS

unexport LX_OBJS

unexport MX_OBJS

unexport MIX_OBJS

unexport SYMTAB_OBJS

unexport MOD_LIST_NAME

#

# Get things started.

#

first_rule: sub_dirs

        $(MAKE) all_targets

#

# Common rules

#

%.s: %.c

        $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -S $< -o $@

%.o: %.c

        $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<

%.o: %.s

        $(AS) $(ASFLAGS) $(EXTRA_CFLAGS) -o $@ $<

#

#

#

all_targets: $(O_TARGET) $(L_TARGET)

#

# Rule to compile a set of .o files into one .o file

#

ifdef O_TARGET

ALL_O = $(OX_OBJS) $(O_OBJS)

$(O_TARGET): $(ALL_O) $(TOPDIR)/include/linux/config.h

        rm -f $@

ifneq "$(strip $(ALL_O))" ""

        $(LD) $(EXTRA_LDFLAGS) -r -o $@ $(ALL_O)

else

        $(AR) rcs $@

endif

endif

#

# Rule to compile a set of .o files into one .a file

#

ifdef L_TARGET

$(L_TARGET): $(LX_OBJS) $(L_OBJS) $(TOPDIR)/include/linux/config.h

        rm -f $@

        $(AR) $(EXTRA_ARFLAGS) rcs $@ $(LX_OBJS) $(L_OBJS)

endif

#

# This make dependencies quickly

#

fastdep: dummy

        if [ -n "$(wildcard *.[chS])" ]; then \

        $(TOPDIR)/scripts/mkdep *.[chS] > .depend; fi

ifdef ALL_SUB_DIRS

        set -e; for i in $(ALL_SUB_DIRS); do $(MAKE) -C $$i fastdep; done

endif

#

# A rule to make subdirectories

#

sub_dirs: dummy

ifdef SUB_DIRS

        set -e; for i in $(SUB_DIRS); do $(MAKE) -C $$i; done

endif

#

# A rule to make modules

#

ALL_MOBJS = $(MX_OBJS) $(M_OBJS)

ifneq "$(strip $(ALL_MOBJS))" ""

PDWN=$(shell $(CONFIG_SHELL) $(TOPDIR)/scripts/pathdown.sh)

endif

modules: $(ALL_MOBJS) $(MIX_OBJS) $(MI_OBJS) dummy

ifdef MOD_SUB_DIRS

        set -e; for i in $(MOD_SUB_DIRS); do $(MAKE) -C $$i modules; done

endif

ifneq "$(strip $(MOD_LIST_NAME))" ""

        rm -f $$TOPDIR/modules/$(MOD_LIST_NAME)

ifdef MOD_SUB_DIRS

        for i in $(MOD_SUB_DIRS); do \

            echo `basename $$i`.o >> $$TOPDIR/modules/$(MOD_LIST_NAME); done

endif

ifneq "$(strip $(ALL_MOBJS))" ""

        echo $(ALL_MOBJS) >> $$TOPDIR/modules/$(MOD_LIST_NAME)

endif

endif

ifneq "$(strip $(ALL_MOBJS))" ""

        echo $(PDWN)

        cd $$TOPDIR/modules; for i in $(ALL_MOBJS); do \

            ln -sf ../$(PDWN)/$$i .; done

endif

#

# A rule to do nothing

#

dummy:

#

# This is useful for testing

#

script:

        $(SCRIPT)

#

# This sets version suffixes on exported symbols

# Uses SYMTAB_OBJS

# Separate the object into "normal" objects and "exporting" objects

# Exporting objects are: all objects that define symbol tables

#

ifdef CONFIG_MODVERSIONS

SYMTAB_OBJS = $(LX_OBJS) $(OX_OBJS) $(MX_OBJS) $(MIX_OBJS)

ifneq "$(strip $(SYMTAB_OBJS))" ""

MODINCL = $(TOPDIR)/include/linux/modules

# The -w option (enable warnings) for /bin/genksyms will return here in 2.1

$(MODINCL)/%.ver: %.c

        @if [ ! -x /sbin/genksyms ]; then echo "Please read: Documentation/modules.txt"; fi

        $(CC) $(CFLAGS) -E -D__GENKSYMS__ $< | /sbin/genksyms $(MODINCL)

$(addprefix $(MODINCL)/,$(SYMTAB_OBJS:.o=.ver)): $(TOPDIR)/include/linux/autoconf.h

.PHONY: $(TOPDIR)/include/linux/modversions.h

$(TOPDIR)/include/linux/modversions.h: $(addprefix $(MODINCL)/,$(SYMTAB_OBJS:.o=.ver))

        @echo updating $(TOPDIR)/include/linux/modversions.h

        @(echo "#ifdef MODVERSIONS";\

        echo "#undef  CONFIG_MODVERSIONS";\

        echo "#define CONFIG_MODVERSIONS";\

        echo "#ifndef _set_ver";\

        echo "#define _set_ver(sym,vers) sym ## _R ## vers";\

        echo "#endif";\

        cd $(TOPDIR)/include/linux/modules; for f in *.ver;\

        do echo "#include "; done; \

        echo "#undef  CONFIG_MODVERSIONS";\

        echo "#endif") \

        > $(TOPDIR)/include/linux/modversions.h

$(MX_OBJS): $(TOPDIR)/include/linux/modversions.h

        $(CC) $(CFLAGS) -DEXPORT_SYMTAB -c $(@:.o=.c)

$(LX_OBJS) $(OX_OBJS): $(TOPDIR)/include/linux/modversions.h

        $(CC) $(CFLAGS) -DMODVERSIONS -DEXPORT_SYMTAB -c $(@:.o=.c)

dep fastdep: $(TOPDIR)/include/linux/modversions.h

endif

$(M_OBJS): $(TOPDIR)/include/linux/modversions.h

ifdef MAKING_MODULES

$(O_OBJS) $(L_OBJS): $(TOPDIR)/include/linux/modversions.h

endif

# This is needed to ensure proper dependency for multipart modules such as

# fs/ext.o.  (Otherwise, not all subobjects will be recompiled when

# version information changes.)

endif

#

# include dependency files they exist

#

ifeq (.depend,$(wildcard .depend))

include .depend

endif

ifeq ($(TOPDIR)/.hdepend,$(wildcard $(TOPDIR)/.hdepend))

include $(TOPDIR)/.hdepend

endif