X-Git-Url: https://git.archive.openwrt.org/?a=blobdiff_plain;ds=sidebyside;f=include%2Fkernel-defaults.mk;h=052b2b3a7be4f4b0f52f29cc496a15215cb6342b;hb=754bf7e0370e806fbee1362cb1068c26104246aa;hp=f3b5e421d1db3ef8d9c9c760e9a7a18e2b6db46f;hpb=6061b1de62c2832ccdd0799c7ddd89d531b14b4f;p=openwrt.git

diff --git a/include/kernel-defaults.mk b/include/kernel-defaults.mk
index f3b5e421d1..052b2b3a7b 100644
--- a/include/kernel-defaults.mk
+++ b/include/kernel-defaults.mk
@@ -138,13 +138,15 @@ IMAGES_DIR:=../../x86/boot
 endif
 
 define Kernel/CopyImage
-	$(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1)
-	$(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf
-	$(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.debug
-	$(foreach k, \
-		$(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out dtbs,$(KERNELNAME))), \
-		$(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1); \
-	)
+	cmp -s $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug || { \
+		$(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1); \
+		$(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf; \
+		$(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug; \
+		$(foreach k, \
+			$(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out dtbs,$(KERNELNAME))), \
+			$(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1); \
+		) \
+	}
 endef
 
 define Kernel/CompileImage/Default