arc770: only calculate entry point address when necessary

$(eval) runs even during prereq check, which can cause bogus error
messages

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

diff --git a/target/linux/arc770/image/Makefile b/target/linux/arc770/image/Makefile
index f52f84017d0301dc24ac733ecef6f612972c7485..260757845ea99b9c7c3d631b0fcda0ce0ad4310b 100644 (file)
--- a/target/linux/arc770/image/Makefile
+++ b/target/linux/arc770/image/Makefile
@@ -10,9 +10,7 @@ include $(INCLUDE_DIR)/image.mk
 # On ARC initramfs is put before entry point and so entry point moves
 # in memory from build to built. Thus we need to extract EP from vmlinux
 # every time before generation of uImage.
-define Build/calculate-ep
-       $(eval KERNEL_ENTRY=$(shell $(KERNEL_CROSS)readelf -h $(1) | grep "Entry point address" | grep -o 0x.*))
-endef
+kernel_ep = `$(KERNEL_CROSS)readelf -h $(1) | grep "Entry point address" | grep -o 0x.*`
 
 define Build/patch-dtb
        $(STAGING_DIR_HOST)/bin/patch-dtb $@ $(DTS_DIR)/$(DEVICE_DTS).dtb
@@ -69,9 +67,8 @@ endef
 
 define Image/BuildKernel
        # Build unified uImage
-       $(call Build/calculate-ep, $(KDIR)/vmlinux.elf)
        $(call Image/BuildKernel/MkuImage, \
-               none, $(KERNEL_LOADADDR), $(KERNEL_ENTRY), \
+               none, $(KERNEL_LOADADDR),$(call kernel_ep,$(KDIR)/vmlinux.elf) , \
                $(KDIR)/vmlinux, \
                $(BIN_DIR)/$(IMG_PREFIX)-uImage \
        )