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build: skip rebuild of kernel images if the source did not change

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Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 48145
This commit is contained in:
Felix Fietkau 2016-01-06 18:38:49 +00:00
parent 947eac1803
commit 4ab26a52ef
2 changed files with 15 additions and 15 deletions
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14
include/image.mk
View file

@ -357,7 +357,7 @@ endef
define Build/kernel-bin
rm -f $@
cp $^ $@
cp $< $@
endef
define Build/patch-cmdline
@ -444,6 +444,7 @@ define Device/Init
KERNEL_INITRAMFS_NAME = $$(KERNEL_NAME)-initramfs
KERNEL_INSTALL :=
KERNEL_NAME := vmlinux
KERNEL_DEPENDS :=
KERNEL_SIZE :=
FILESYSTEMS := $(TARGET_FILESYSTEMS)
@ -468,11 +469,11 @@ define Device/Build/initramfs
$(call Device/Export,$(KDIR)/tmp/$$(KERNEL_INITRAMFS_IMAGE),$(1))
$$(_TARGET): $(BIN_DIR)/$$(KERNEL_INITRAMFS_IMAGE)
$(KDIR)/$$(KERNEL_INITRAMFS_NAME): image_prepare
$(KDIR)/$$(KERNEL_INITRAMFS_NAME):: image_prepare
$(BIN_DIR)/$$(KERNEL_INITRAMFS_IMAGE): $(KDIR)/tmp/$$(KERNEL_INITRAMFS_IMAGE)
cp $$^ $$@
$(KDIR)/tmp/$$(KERNEL_INITRAMFS_IMAGE): $(KDIR)/$$(KERNEL_INITRAMFS_NAME)
$(KDIR)/tmp/$$(KERNEL_INITRAMFS_IMAGE): $(KDIR)/$$(KERNEL_INITRAMFS_NAME) $(CURDIR)/Makefile $$(KERNEL_DEPENDS)
@rm -f $$@
$$(call concat_cmd,$$(KERNEL_INITRAMFS))
endef
@ -495,7 +496,7 @@ endef
define Device/Build/kernel
_KERNEL_IMAGES += $(KDIR)/$$(KERNEL_NAME)
$(KDIR)/$$(KERNEL_NAME): image_prepare
$(KDIR)/$$(KERNEL_NAME):: image_prepare
$$(_TARGET): $$(if $$(KERNEL_INSTALL),$(BIN_DIR)/$$(KERNEL_IMAGE))
$(call Device/Export,$(KDIR)/$$(KERNEL_IMAGE),$(1))
$(BIN_DIR)/$$(KERNEL_IMAGE): $(KDIR)/$$(KERNEL_IMAGE)
@ -504,7 +505,7 @@ define Device/Build/kernel
ifdef CONFIG_IB
install: $(KDIR)/$$(KERNEL_IMAGE)
endif
$(KDIR)/$$(KERNEL_IMAGE): $(KDIR)/$$(KERNEL_NAME)
$(KDIR)/$$(KERNEL_IMAGE): $(KDIR)/$$(KERNEL_NAME) $(CURDIR)/Makefile $$(KERNEL_DEPENDS)
@rm -f $$@
$$(call concat_cmd,$$(KERNEL))
$$(if $$(KERNEL_SIZE),$$(call Device/Build/check_size,$$(KERNEL_SIZE)))
@ -581,9 +582,6 @@ define BuildImage
$(foreach device,$(TARGET_DEVICES),$(call Device,$(device)))
$(foreach fs,$(TARGET_FILESYSTEMS) $(fs-subtypes-y),$(call BuildImage/mkfs,$(fs)))
$$(sort $$(_KERNEL_IMAGES)):
@touch $$@
install: kernel_prepare
$(foreach fs,$(TARGET_FILESYSTEMS),
$(call Image/Build,$(fs))

10
include/kernel-defaults.mk
View file

@ -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
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