How to change build order about vmlinux

For Developers
1

I want to build bbl package

include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk

PKG_NAME:=bbl
PKG_SOURCE_PROTO:=git
PKG_SOURCE_URL:=https://github.com/riscv/riscv-pk.git
PKG_SOURCE_VERSION:=0179115bfbd1f8070f7c1bb0bbfd5123ef9f8bd8

include $(INCLUDE_DIR)/package.mk

define Package/bbl
 SECTION:=boot
 CATEGORY:=Boot Loaders
 DEPENDS:=@TARGET_riscv64
 DEFAULT:=y
 TITLE:=Berkeley boot loader
endef

define Package/bbl/description
        Berkeley boot loader
endef

define Package/bbl/install
        echo BBL install ok
endef

define Build/Prepare
        $(call Build/Prepare/Default)
        mkdir -p $(PKG_BUILD_DIR)/build
endef

define Build/Configure
        cd $(PKG_BUILD_DIR)/build; \
                ../configure --host=riscv64-linux --with-payload=$(KERNEL_BUILD_DIR)/vmlinux
endef

define Build/Compile
        $(MAKE) -C $(PKG_BUILD_DIR)/build
endef

$(eval $(call BuildPackage,bbl))

bbl must have a vmlinux
--with-payload=$(KERNEL_BUILD_DIR)/vmlinux

How can I fix it?

I hope to be able to establish vmlinux and then establish bbl

2

What device? What version buildroot? what error are you getting?

3

Unfortunately you cannot simply change build order of vmlinux, as this behaviour is deeply rooted in the build system. The only solution I see is compiling bbl with a dummy payload, then perform the final linkage of the payload in the image build recipe, similar to how e.g. lzma-loader is handled in Image/Prepare of target/linux/brcm47xx/image/Makefile.

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