Add an 'export' target to the NuttX top-level Makefile

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3771 42af7a65-404d-4744-a932-0658087f49c3

arch/x86/src/Makefile

@@ -53,7 +53,7 @@ else
 		   -I$(ARCH_SRCDIR)/$(ARCH_SUBDIR) -I$(TOPDIR)/sched
 endif
 
-HEAD_AOBJ	= $(HEAD_ASRC:.S=$(OBJEXT))
+HEAD_OBJ	= $(HEAD_ASRC:.S=$(OBJEXT))
 
 ASRCS		= $(CHIP_ASRCS) $(CMN_ASRCS)
 AOBJS		= $(ASRCS:.S=$(OBJEXT))
@@ -85,7 +85,7 @@ VPATH		= chip:common:$(ARCH_SUBDIR)
 
 all: $(HEAD_OBJ) libarch$(LIBEXT)
 
-$(AOBJS) $(HEAD_AOBJ): %$(OBJEXT): %.S
+$(AOBJS) $(HEAD_OBJ): %$(OBJEXT): %.S
 	$(call ASSEMBLE, $<, $@)
 
 $(COBJS): %$(OBJEXT): %.c
@@ -99,9 +99,9 @@ libarch$(LIBEXT): $(OBJS)
 board/libboard$(LIBEXT):
 	@$(MAKE) -C board TOPDIR="$(TOPDIR)" libboard$(LIBEXT) EXTRADEFINES=$(EXTRADEFINES)
 
-nuttx$(EXEEXT): $(HEAD_AOBJ) board/libboard$(LIBEXT)
+nuttx$(EXEEXT): $(HEAD_OBJ) board/libboard$(LIBEXT)
 	@echo "LD: nuttx$(EXEEXT)"
-	@$(LD) --entry=__start $(LDFLAGS) $(LIBPATHS) -o $(NUTTX)$(EXEEXT) $(HEAD_AOBJ) $(EXTRA_OBJS) \
+	@$(LD) --entry=__start $(LDFLAGS) $(LIBPATHS) -o $(NUTTX)$(EXEEXT) $(HEAD_OBJ) $(EXTRA_OBJS) \
 		--start-group $(LDLIBS) -lboard --end-group $(EXTRA_LIBS) $(LIBGCC)
 ifeq ($(CONFIG_BOOT_RUNFROMFLASH),y)
 	@export flashloc=`$(OBJDUMP) --all-headers $(NUTTX)$(EXEEXT) | grep _eronly | cut -d' ' -f1`;  \
@@ -117,6 +117,18 @@ endif
 		mv $(NUTTX).flashimage $(NUTTX)$(EXEEXT); \
 	fi
 
+# This is part of the top-level export target
+
+export_head: board/libboard$(LIBEXT) $(HEAD_OBJ)
+	@if [ -d "$(EXPORT_DIR)/startup" ]; then \
+		cp -f $(HEAD_OBJ) "$(EXPORT_DIR)/startup"; \
+	 else \
+		echo "$(EXPORT_DIR)/startup does not exist"; \
+		exit 1; \
+	 fi
+
+# Dependencies
+
 .depend: Makefile chip/Make.defs $(SRCS)
 	@if [ -e board/Makefile ]; then \
 		$(MAKE) -C board TOPDIR="$(TOPDIR)" depend ; \