[ARM] Convert ARM makefiles to new kbuild (Sam Ravnborg, Kai, rmk)

arch/arm/Makefile

@@ -63,10 +63,8 @@ HEAD		:= arch/arm/mach-arc/head.o arch/arm/kernel/init_task.o
   ifeq ($(CONFIG_ROM_KERNEL),y)
     DATAADDR	 = 0x02080000
     TEXTADDR	 = 0x03800000
-    LDSCRIPT	 = arch/arm/vmlinux-armo-rom.lds.in
   else
     TEXTADDR	 = 0x02080000
-    LDSCRIPT	 = arch/arm/vmlinux-armo.lds.in
   endif
 endif
 
@@ -191,8 +189,7 @@ drivers-$(CONFIG_ARCH_L7200)	+= drivers/acorn/char/
 
 libs-y				+= arch/arm/lib/
 
-MAKEBOOT	 =$(MAKE) -C arch/$(ARCH)/boot
-MAKETOOLS	 =$(MAKE) -C arch/$(ARCH)/tools
+makeboot = $(call descend,arch/arm/boot,$(1))
 
 #	Update machine arch and proc symlinks if something which affects
 #	them changed.  We use .arch and .proc to indicate when they were
@@ -212,13 +209,16 @@ include/asm-arm/.proc: $(wildcard include/config/cpu/32.h) $(wildcard include/co
 
 prepare: maketools
 
-.PHONY: maketools
+.PHONY: maketools FORCE
 maketools: include/asm-arm/.arch include/asm-arm/.proc \
-	 include/asm-arm/constants.h include/linux/version.h FORCE
-	@$(MAKETOOLS)
+	   include/asm-arm/constants.h include/linux/version.h FORCE
+	+@$(call descend,arch/arm/tools, include/asm-arm/mach-types.h)
 
-bzImage zImage zinstall Image bootpImage install: vmlinux
-	@$(MAKEBOOT) $@
+zImage Image bootpImage: vmlinux
+	+@$(call makeboot,arch/arm/boot/$@)
+
+bzImage zinstall install: vmlinux
+	+@$(call makeboot,$@)
 
 MRPROPER_FILES	+= \
 	include/asm-arm/arch include/asm-arm/.arch \
@@ -227,18 +227,16 @@ MRPROPER_FILES	+= \
 	include/asm-arm/mach-types.h
 
 # We use MRPROPER_FILES and CLEAN_FILES now
-archmrproper: FORCE
-	@/bin/true
-
+archmrproper:
 archclean: FORCE
-	@$(MAKEBOOT) clean
+	+@$(call makeboot,clean)
 
 # My testing targets (that short circuit a few dependencies)
-zImg:;	@$(MAKEBOOT) zImage
-Img:;	@$(MAKEBOOT) Image
-i:;	@$(MAKEBOOT) install
-zi:;	@$(MAKEBOOT) zinstall
-bp:;	@$(MAKEBOOT) bootpImage
+zImg:;	+@$(call makeboot, zImage)
+Img:;	+@$(call makeboot, Image)
+i:;	+@$(call makeboot, install)
+zi:;	+@$(call makeboot, zinstall)
+bp:;	+@$(call makeboot, bootpImage)
 
 #
 # Configuration targets.  Use these to select a

arch/arm/boot/Makefile

@@ -8,8 +8,6 @@
 # Copyright (C) 1995-2002 Russell King
 #
 
-SYSTEM	=$(TOPDIR)/vmlinux
-
 # Note: the following conditions must always be true:
 #   ZRELADDR == virt_to_phys(TEXTADDR)
 #   PARAMS_PHYS must be with 4MB of ZRELADDR
@@ -121,38 +119,57 @@ ZTEXTADDR	=0
 ZBSSADDR	=ALIGN(4)
 endif
 
-export	SYSTEM ZTEXTADDR ZBSSADDR ZRELADDR INITRD_PHYS PARAMS_PHYS
+export	ZTEXTADDR ZBSSADDR ZRELADDR INITRD_PHYS PARAMS_PHYS
+
+include $(TOPDIR)/Rules.make
 
-Image:	$(SYSTEM)
-	$(OBJCOPY) $(OBJCOPYFLAGS) $< $@
+$(obj)/Image: vmlinux FORCE
+	$(call if_changed,objcopy)
 
-bzImage: zImage
+bzImage: $(obj)/zImage
 
-zImage:	compressed/vmlinux
-	$(OBJCOPY) $(OBJCOPYFLAGS) $< $@
+$(obj)/zImage:	$(obj)/compressed/vmlinux FORCE
+	$(call if_changed,objcopy)
 
-bootpImage: bootp/bootp
-	$(OBJCOPY) $(OBJCOPYFLAGS) $< $@
+$(obj)/bootpImage: $(obj)/bootp/bootp FORCE
+	$(call if_changed,objcopy)
 
-compressed/vmlinux: $(TOPDIR)/vmlinux FORCE
-	@$(MAKE) -C compressed vmlinux
+$(obj)/compressed/vmlinux: vmlinux FORCE
+	+@$(call descend,arch/arm/boot/compressed, $(obj)/compressed/vmlinux)
 
-bootp/bootp: zImage initrd FORCE
-	@$(MAKE) -C bootp bootp
+$(obj)/bootp/bootp: $(obj)/zImage initrd FORCE
+	+@$(call descend,arch/arm/boot/bootp, $(obj)/bootp/bootp)
 
+.PHONY: initrd
 initrd:
-	@test "$(INITRD_PHYS)" != "" || (echo This machine does not support INITRD; exit -1)
-	@test "$(INITRD)" != "" || (echo You must specify INITRD; exit -1)
+	@test "$(INITRD_PHYS)" != "" || \
+	(echo This machine does not support INITRD; exit -1)
+	@test "$(INITRD)" != "" || \
+	(echo You must specify INITRD; exit -1)
 
-install: Image
-	sh ./install.sh $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) Image $(TOPDIR)/System.map "$(INSTALL_PATH)"
+install: $(obj)/Image
+	$(CONFIG_SHELL) $(obj)/install.sh \
+	$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) \
+	$(obj)/Image System.map "$(INSTALL_PATH)"
 
-zinstall: zImage
-	sh ./install.sh $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) zImage $(TOPDIR)/System.map "$(INSTALL_PATH)"
+zinstall: $(obj)/zImage
+	$(CONFIG_SHELL) $(obj)/install.sh \
+	$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) \
+	$(obj)/zImage System.map "$(INSTALL_PATH)"
 
 clean:
-	$(RM) Image zImage bootpImage
-	@$(MAKE) -C compressed clean
-	@$(MAKE) -C bootp clean
+	$(RM) $(addprefix $(obj)/,Image zImage bootpImage)
+	+@$(call descend,arch/arm/boot/bootp, clean)
+	+@$(call descend,arch/arm/boot/compressed, clean)
+
+archhelp:
+	@echo  '* bzImage/zImage- Compressed kernel image (arch/$(ARCH)/boot/zImage)'
+	@echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
+	@echo  '  bootpImage    - Combined zImage and initial RAM disk' 
+	@echo  '  install       - Install uncompressed kernel'
+	@echo  '  zinstall      - Install compressed kernel'
+	@echo  '                  Install using (your) ~/bin/installkernel or'
+	@echo  '                  (distribution) /sbin/installkernel or'
+	@echo  '                  install to $$(INSTALL_PATH) and run lilo'
+
 
-FORCE:

arch/arm/boot/bootp/Makefile

@@ -2,23 +2,25 @@
 # linux/arch/arm/boot/bootp/Makefile
 #
 
-ZSYSTEM		=$(TOPDIR)/arch/arm/boot/zImage
-ZLDFLAGS	=-p -X -T bootp.lds \
+ZSYSTEM		= arch/arm/boot/zImage
+ZLDFLAGS	=-p -X -T $(obj)/bootp.lds \
 		 --defsym initrd_addr=$(INITRD_PHYS) \
 		 --defsym params=$(PARAMS_PHYS)
 
-all:		bootp
+EXTRA_TARGETS := bootp
+
+include $(TOPDIR)/Rules.make
 
 # Note that bootp.lds picks up kernel.o and initrd.o
-bootp:		init.o kernel.o initrd.o bootp.lds
-		$(LD) $(ZLDFLAGS) -o $@ init.o
+$(obj)/bootp:	$(addprefix $(obj)/,init.o kernel.o initrd.o bootp.lds)
+		$(LD) $(ZLDFLAGS) -o $@ $(obj)/init.o
 
-kernel.o:	$(ZSYSTEM)
+$(obj)/kernel.o: $(ZSYSTEM)
 		$(LD) -r -s -o $@ -b binary $(ZSYSTEM)
 
-initrd.o:	$(INITRD)
+$(obj)/initrd.o: $(INITRD)
 		$(LD) -r -s -o $@ -b binary $(INITRD)
 
 .PHONY:		$(INITRD) $(ZSYSTEM)
 
-clean:;		$(RM) bootp
+clean:;		$(RM) $(obj)/bootp

arch/arm/boot/compressed/Makefile

@@ -3,22 +3,20 @@
 #
 # create a compressed vmlinuz image from the original vmlinux
 #
-# Note! SYSTEM, ZTEXTADDR, ZBSSADDR and ZRELADDR are now exported
+# Note! ZTEXTADDR, ZBSSADDR and ZRELADDR are now exported
 # from arch/arm/boot/Makefile
 #
 
-HEAD		 = head.o
-OBJS		 = misc.o
-CFLAGS		 = $(CPPFLAGS) -O2 -DSTDC_HEADERS $(CFLAGS_BOOT) -fpic
-FONTC		 = $(TOPDIR)/drivers/video/font_acorn_8x8.c
-ZLDFLAGS	 = -p -X -T vmlinux.lds
+HEAD	= head.o
+OBJS	= misc.o
+FONTC	= drivers/video/font_acorn_8x8.c
 
 #
 # Architecture dependencies
 #
 ifeq ($(CONFIG_ARCH_ACORN),y)
 OBJS		+= ll_char_wr.o font.o
-CFLAGS		+= -DPARAMS_PHYS=$(PARAMS_PHYS)
+CFLAGS_misc.o	:= -DPARAMS_PHYS=$(PARAMS_PHYS)
 endif
 
 ifeq ($(CONFIG_ARCH_NETWINDER),y)
@@ -65,35 +63,39 @@ ifeq ($(CONFIG_CPU_XSCALE),y)
 OBJS		+= head-xscale.o
 endif
 
-SEDFLAGS	= s/TEXT_START/$(ZTEXTADDR)/;s/LOAD_ADDR/$(ZRELADDR)/;s/BSS_START/$(ZBSSADDR)/
+SEDFLAGS	= s/TEXT_START/$(ZTEXTADDR)/;s/LOAD_ADDR/$(ZRELADDR)/;\
+s/BSS_START/$(ZBSSADDR)/;s#OBJ#$(obj)#
 
-LIBGCC		:= $(shell $(CC) $(CFLAGS) --print-libgcc-file-name)
+EXTRA_TARGETS := vmlinux piggy.o font.o head.o $(OBJS)
+EXTRA_CFLAGS  := $(CFLAGS_BOOT) -fpic
+EXTRA_AFLAGS  := -traditional
 
-all:		vmlinux
+include $(TOPDIR)/Rules.make
 
-vmlinux:	$(HEAD) $(OBJS) piggy.o vmlinux.lds
-		$(LD) $(ZLDFLAGS) $(HEAD) $(OBJS) piggy.o $(LIBGCC) -o vmlinux
+LDFLAGS_vmlinux := -p -X \
+	$(shell $(CC) $(CFLAGS) --print-libgcc-file-name) -T
 
-$(HEAD): 	$(HEAD:.o=.S)
-		$(CC) $(AFLAGS) -traditional -c $(HEAD:.o=.S)
+$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \
+	 	$(addprefix $(obj)/, $(OBJS))
+	$(call if_changed,ld)
 
-piggy.o:	$(SYSTEM)
-		$(OBJCOPY) $(OBJCOPYFLAGS) $(SYSTEM) piggy
-		gzip $(GZFLAGS) < piggy > piggy.gz
-		$(LD) -r -o $@ -b binary piggy.gz
-		rm -f piggy piggy.gz
 
-font.o:		$(FONTC)
-		$(CC) $(CFLAGS) -Dstatic= -c -o $@ $(FONTC)
+$(obj)/piggy:    vmlinux;	$(call if_changed,objcopy)
+$(obj)/piggy.gz: $(obj)/piggy;	$(call if_changed,gzip)
 
-vmlinux.lds:	vmlinux.lds.in Makefile $(TOPDIR)/arch/$(ARCH)/boot/Makefile $(TOPDIR)/.config
-		@sed "$(SEDFLAGS)" < vmlinux.lds.in > $@
+LDFLAGS_piggy.o := -r -b binary
+$(obj)/piggy.o:  $(obj)/piggy.gz
+	$(call if_changed,ld)
 
-clean:;		rm -f vmlinux core piggy* vmlinux.lds
+CFLAGS_font.o := -Dstatic=
+$(obj)/font.o: $(FONTC)
+
+$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in Makefile arch/arm/boot/Makefile .config
+	@sed "$(SEDFLAGS)" < $< > $@
 
 .PHONY:	clean
+clean:
+	rm -f $(addprefix $(obj)/,vmlinux core piggy* vmlinux.lds)
 
-misc.o: misc.c $(TOPDIR)/include/asm/arch/uncompress.h $(TOPDIR)/lib/inflate.c
+$(obj)/misc.o: $(obj)/misc.c include/asm/arch/uncompress.h lib/inflate.c
 
-%.o: %.S
-	$(CC) $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$@) -c -o $@ $<

arch/arm/boot/compressed/vmlinux.lds.in

@@ -28,7 +28,7 @@ SECTIONS
     *(.glue_7)
     *(.glue_7t)
     input_data = .;
-    piggy.o
+    arch/arm/boot/compressed/piggy.o
     input_data_end = .;
     . = ALIGN(4);
   }

arch/arm/kernel/Makefile

@@ -43,6 +43,7 @@ EXTRA_TARGETS := $(head-y) init_task.o
 include $(TOPDIR)/Rules.make
 
 # Spell out some dependencies that `make dep' doesn't spot
-entry-armv.o: entry-header.S $(TOPDIR)/include/asm-arm/constants.h
-entry-armo.o: entry-header.S $(TOPDIR)/include/asm-arm/constants.h
-entry-common.o: entry-header.S calls.S $(TOPDIR)/include/asm-arm/constants.h
+$(obj)/entry-armv.o: 	$(obj)/entry-header.S include/asm-arm/constants.h
+$(obj)/entry-armo.o: 	$(obj)/entry-header.S include/asm-arm/constants.h
+$(obj)/entry-common.o: 	$(obj)/entry-header.S include/asm-arm/constants.h \
+			$(obj)/calls.S

arch/arm/lib/Makefile

@@ -43,6 +43,6 @@ obj-$(CONFIG_CPU_26) += uaccess-armo.o
 
 include $(TOPDIR)/Rules.make
 
-csumpartialcopy.o: csumpartialcopygeneric.S
-csumpartialcopyuser.o: csumpartialcopygeneric.S
+$(obj)/csumpartialcopy.o:	$(obj)/csumpartialcopygeneric.S
+$(obj)/csumpartialcopyuser.o:	$(obj)/csumpartialcopygeneric.S
 

arch/arm/mm/Makefile

@@ -42,4 +42,4 @@ obj-y		+= $(sort $(p-y))
 include $(TOPDIR)/Rules.make
 
 # Special dependencies
-$(p-y):	$(TOPDIR)/include/asm-arm/constants.h
+$(obj)/$(p-y):	include/asm-arm/constants.h

arch/arm/tools/Makefile

@@ -4,9 +4,9 @@
 # Copyright (C) 2001 Russell King
 #
 
-all:	$(TOPDIR)/include/asm-arm/mach-types.h
+include $(TOPDIR)/Rules.make
 
-$(TOPDIR)/include/asm-arm/mach-types.h: mach-types gen-mach-types
-	awk -f gen-mach-types mach-types > $@
+include/asm-arm/mach-types.h: $(obj)/mach-types $(obj)/gen-mach-types
+	@echo '  Generating $@'
+	@awk -f $(obj)/gen-mach-types $(obj)/mach-types > $@
 
-.PHONY:	all