Makefile: generate a barebox-flash-image link

Depending on the SoC a barebox.bin, barebox.netx, barebox.s5p, MLO image
is generated. With pbl support there now is an additional
arch/arm/pbl/zbarebox.bin image.

To help the user to determine which image should be flashed to his device,
generate a barebox-flash-image link.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Makefile

@@ -437,12 +437,6 @@ else
 include/config/auto.conf: ;
 endif # $(dot-config)
 
-# The all: target is the default when no target is given on the
-# command line.
-# This allow a user to issue only 'make' to build a kernel
-# Defaults barebox but it is usually overridden in the arch makefile
-all: barebox.bin
-
 include $(srctree)/arch/$(ARCH)/Makefile
 
 ifdef CONFIG_DEBUG_INFO
@@ -473,7 +467,12 @@ CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 # set in the environment
 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 # this default value
-export KBUILD_IMAGE ?= barebox
+export KBUILD_IMAGE ?= barebox.bin
+
+barebox-flash-image: $(KBUILD_IMAGE)
+	$(call if_changed,ln)
+
+all: barebox-flash-image
 
 common-$(CONFIG_PBL_IMAGE)	+= pbl/
 
@@ -1009,7 +1008,7 @@ CLEAN_DIRS  += $(MODVERDIR)
 CLEAN_FILES +=	barebox System.map include/generated/barebox_default_env.h \
                 .tmp_version .tmp_barebox* barebox.bin barebox.map barebox.S \
 		.tmp_kallsyms* barebox_default_env* barebox.ldr \
-		scripts/bareboxenv-target \
+		scripts/bareboxenv-target barebox-flash-image \
 		Doxyfile.version barebox.srec barebox.s5p
 
 # Directories & files removed with 'make mrproper'

arch/arm/Makefile

@@ -208,8 +208,6 @@ zbarebox.S zbarebox.bin zbarebox: barebox.bin
 archclean:
 	$(MAKE) $(clean)=$(pbl)
 
-all: $(KBUILD_IMAGE)
-
 archprepare: maketools
 maketools:
 	$(Q)$(MAKE) $(build)=arch/arm/tools include/generated/mach-types.h

arch/blackfin/Makefile

@@ -13,7 +13,7 @@ CFLAGS += -D__blackfin__
 KALLSYMS         += --symbol-prefix=_
 
 ifndef CONFIG_BFIN_BOOT_BYPASS
-all: barebox.ldr
+KBUILD_IMAGE := barebox.ldr
 endif
 
 archprepare: maketools

arch/mips/Makefile

@@ -82,8 +82,6 @@ incdir-y := $(machine-y)
 endif
 INCDIR   := arch-$(incdir-y)
 
-all: $(KBUILD_IMAGE)
-
 ifneq ($(board-y),)
 BOARD := arch/mips/boards/$(board-y)/
 else

arch/x86/Makefile

@@ -14,11 +14,6 @@ CPPFLAGS += -fdata-sections -ffunction-sections
 LDFLAGS_uboot += -static --gc-sections
 endif
 
-all: $(KBUILD_IMAGE)
-
-
-
-
 machdirs := $(patsubst %,arch/x86/mach-%/,$(machine-y))
 
 ifeq ($(KBUILD_SRC),)