190 lines
4.2 KiB
Makefile
190 lines
4.2 KiB
Makefile
#
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# This file contains rules which are shared between multiple Makefiles.
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#
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#
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# False targets.
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#
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.PHONY: dummy
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#
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# Special variables which should not be exported
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#
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unexport EXTRA_ASFLAGS
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unexport EXTRA_CFLAGS
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unexport EXTRA_LDFLAGS
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unexport EXTRA_ARFLAGS
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unexport SUBDIRS
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unexport SUB_DIRS
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unexport ALL_SUB_DIRS
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unexport MOD_SUB_DIRS
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unexport O_TARGET
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unexport O_OBJS
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unexport L_OBJS
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unexport M_OBJS
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unexport ALL_MOBJS
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# objects that export symbol tables
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unexport OX_OBJS
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unexport LX_OBJS
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unexport MX_OBJS
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unexport SYMTAB_OBJS
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unexport MOD_LIST_NAME
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#
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# Get things started.
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#
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first_rule: sub_dirs
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$(MAKE) all_targets
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#
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# Common rules
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#
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%.s: %.c
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$(CC) $(CFLAGS) $(EXTRA_CFLAGS) -S $< -o $@
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%.o: %.c
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$(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
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%.o: %.s
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$(AS) $(ASFLAGS) $(EXTRA_CFLAGS) -o $@ $<
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#
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#
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#
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all_targets: $(O_TARGET) $(L_TARGET)
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#
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# Rule to compile a set of .o files into one .o file
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#
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ifdef O_TARGET
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ALL_O = $(OX_OBJS) $(O_OBJS)
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$(O_TARGET): $(ALL_O) $(KERNELDIR)/include/linux/config.h
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rm -f $@
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ifneq "$(strip $(ALL_O))" ""
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$(LD) $(EXTRA_LDFLAGS) -r -o $@ $(ALL_O)
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else
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$(AR) rcs $@
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endif
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endif
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#
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# Rule to compile a set of .o files into one .a file
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#
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ifdef L_TARGET
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$(L_TARGET): $(LX_OBJS) $(L_OBJS) $(KERNELDIR)/include/linux/config.h
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rm -f $@
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$(AR) $(EXTRA_ARFLAGS) rcs $@ $(LX_OBJS) $(L_OBJS)
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endif
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#
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# This make dependencies quickly
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#
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fastdep: dummy
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if [ -n "$(wildcard *.[chS])" ]; then \
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$(TOPDIR)/scripts/mkdep *.[chS] > .depend; fi
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ifdef ALL_SUB_DIRS
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set -e; for i in $(ALL_SUB_DIRS); do $(MAKE) -C $$i fastdep; done
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endif
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#
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# A rule to make subdirectories
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#
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sub_dirs: dummy
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ifdef SUB_DIRS
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set -e; for i in $(SUB_DIRS); do $(MAKE) -C $$i; done
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endif
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#
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# A rule to make modules
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#
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ALL_MOBJS = $(MX_OBJS) $(M_OBJS)
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modules: $(ALL_MOBJS) dummy
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ifdef MOD_SUB_DIRS
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set -e; for i in $(MOD_SUB_DIRS); do $(MAKE) -C $$i modules; done
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endif
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modules_install: $(ALL_MOBJS) dummy
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ifdef MOD_SUB_DIRS
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set -e; for i in $(MOD_SUB_DIRS); do $(MAKE) -C $$i modules_install; done
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endif
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ifneq "$(strip $(ALL_MOBJS))" ""
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mkdir -p $(MODDEST)
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cp -p $(ALL_MOBJS) $(MODDEST)
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endif
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#
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# A rule to do nothing
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#
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dummy:
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#
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# This is useful for testing
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#
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script:
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$(SCRIPT)
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#
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# This sets version suffixes on exported symbols
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# Uses SYMTAB_OBJS
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# Separate the object into "normal" objects and "exporting" objects
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# Exporting objects are: all objects that define symbol tables
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#
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ifdef CONFIG_MODVERSIONS
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SYMTAB_OBJS = $(LX_OBJS) $(OX_OBJS) $(MX_OBJS)
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ifneq "$(strip $(SYMTAB_OBJS))" ""
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MODINCL = $(KERNELDIR)/include/linux/modules
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# The -w option (enable warnings) for /bin/genksyms will return here in 2.1
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$(MODINCL)/%.ver: %.c
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@if [ ! -x /sbin/genksyms ]; then echo "Please read: Documentation/modules.txt"; fi
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$(CC) $(CFLAGS) -E -D__GENKSYMS__ $< | /sbin/genksyms $(MODINCL)
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$(addprefix $(MODINCL)/,$(SYMTAB_OBJS:.o=.ver)): $(KERNELDIR)/include/linux/autoconf.h
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$(KERNELDIR)/include/linux/modversions.h: $(addprefix $(MODINCL)/,$(SYMTAB_OBJS:.o=.ver))
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@echo updating $(KERNELDIR)/include/linux/modversions.h
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@(echo "#ifdef MODVERSIONS";\
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echo "#undef CONFIG_MODVERSIONS";\
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echo "#define CONFIG_MODVERSIONS";\
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echo "#ifndef _set_ver";\
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echo "#define _set_ver(sym,vers) sym ## _R ## vers";\
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echo "#endif";\
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cd $(KERNELDIR)/include/linux/modules; for f in *.ver;\
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do echo "#include <linux/modules/$${f}>"; done; \
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echo "#undef CONFIG_MODVERSIONS";\
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echo "#endif") \
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> $(KERNELDIR)/include/linux/modversions.h
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$(MX_OBJS): $(KERNELDIR)/include/linux/modversions.h
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$(CC) $(CFLAGS) -DEXPORT_SYMTAB -c $(@:.o=.c)
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$(LX_OBJS) $(OX_OBJS): $(KERNELDIR)/include/linux/modversions.h
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$(CC) $(CFLAGS) -DMODVERSIONS -DEXPORT_SYMTAB -c $(@:.o=.c)
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dep fastdep: $(KERNELDIR)/include/linux/modversions.h
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endif
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$(M_OBJS): $(KERNELDIR)/include/linux/modversions.h
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ifdef MAKING_MODULES
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$(O_OBJS) $(L_OBJS): $(KERNELDIR)/include/linux/modversions.h
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endif
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# This is needed to ensure proper dependency for multipart modules such as
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# fs/ext.o. (Otherwise, not all subobjects will be recompiled when
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# version information changes.)
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endif
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#
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# include dependency files they exist
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#
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ifeq (.depend,$(wildcard .depend))
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include .depend
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endif
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ifeq ($(KERNELDIR)/.hdepend,$(wildcard $(KERNELDIR)/.hdepend))
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include $(KERNELDIR)/.hdepend
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endif
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