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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 ALL_MOBJS
# objects that export symbol tables
unexport OX_OBJS
unexport LX_OBJS
unexport MX_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) 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)/$$i .; done
endif
#
# A rule to do nothing
#
dummy:
#
# This is useful for testing
#
script:
$(SCRIPT)
#
# This sets version suffixes on exported symbols
# Uses SYMTAB_OBJS
# Separate the object into "normal" objects and "exporting" objects
# Exporting objects are: all objects that define symbol tables
#
ifdef CONFIG_MODVERSIONS
SYMTAB_OBJS = $(LX_OBJS) $(OX_OBJS) $(MX_OBJS)
ifneq "$(strip $(SYMTAB_OBJS))" ""
MODINCL = $(TOPDIR)/include/linux/modules
# The -w option (enable warnings) for /bin/genksyms will return here in 2.1
$(MODINCL)/%.ver: %.c
@if [ ! -x /sbin/genksyms ]; then echo "Please read: Documentation/modules.txt"; fi
$(CC) $(CFLAGS) -E -D__GENKSYMS__ $< | /sbin/genksyms $(MODINCL)
$(addprefix $(MODINCL)/,$(SYMTAB_OBJS:.o=.ver)): $(TOPDIR)/include/linux/autoconf.h
$(TOPDIR)/include/linux/modversions.h: $(addprefix $(MODINCL)/,$(SYMTAB_OBJS:.o=.ver))
@echo updating $(TOPDIR)/include/linux/modversions.h
@(echo "#ifdef MODVERSIONS";\
echo "#undef CONFIG_MODVERSIONS";\
echo "#define CONFIG_MODVERSIONS";\
echo "#ifndef _set_ver";\
echo "#define _set_ver(sym,vers) sym ## _R ## vers";\
echo "#endif";\
cd $(TOPDIR)/include/linux/modules; for f in *.ver;\
do echo "#include <linux/modules/$${f}>"; 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.)
else
$(TOPDIR)/include/linux/modversions.h:
@touch $(TOPDIR)/include/linux/modversions.h
endif
#
# include dependency files they exist
#
ifeq (.depend,$(wildcard .depend))
include .depend
endif
ifeq ($(TOPDIR)/.hdepend,$(wildcard $(TOPDIR)/.hdepend))
include $(TOPDIR)/.hdepend
endif
|
