DEBUG := false OUT_DIR := out KEY_DIR := keys SRC_DIR := src TARGET := local CACHE_DIR := cache CONFIG_DIR := targets/$(TARGET) TOOLCHAIN_DIR := toolchain SCRIPTS_DIR := scripts USER := $(shell id -g):$(shell id -g) CPUS := $(shell nproc) ARCH := x86_64 include $(PWD)/config.env include $(PWD)/make/keys.mk include $(PWD)/make/fetch.mk include $(PWD)/toolchain/Makefile .DEFAULT_GOAL := default .PHONY: default default: fetch $(OUT_DIR)/bzImage # Clean repo back to initial clone state .PHONY: clean clean: rm -rf cache out docker image rm -f local/$(NAME)-build # Launch a shell inside the toolchain container .PHONY: toolchain-shell toolchain-shell: $(OUT_DIR)/toolchain.tar $(call toolchain,root,bash) # Pin all packages in toolchain container to latest versions .PHONY: toolchain-update toolchain-update: $(call toolchain,root,toolchain-update ) # Source anything required from the internet to build .PHONY: fetch fetch: \ keys \ $(OUT_DIR) \ $(OUT_DIR)/toolchain.tar \ $(CACHE_DIR) \ $(CACHE_DIR)/linux-$(LINUX_VERSION).tar.xz \ $(CACHE_DIR)/linux-$(LINUX_VERSION).tar.sign \ $(CACHE_DIR)/busybox-$(BUSYBOX_VERSION).tar.bz2 \ $(CACHE_DIR)/busybox-$(BUSYBOX_VERSION).tar.bz2.sig # Build latest image and run in terminal via Qemu .PHONY: run run: default qemu-system-x86_64 \ -m 512M \ -nographic \ -kernel $(OUT_DIR)/bzImage # Run ncurses busybox config menu and save output .PHONY: busybox-config busybox-config: rm $(CONFIG_DIR)/busybox.config make $(CONFIG_DIR)/busybox.config # Run linux config menu and save output .PHONY: linux-config linux-config: rm $(CONFIG_DIR)/linux.config make $(CONFIG_DIR)/linux.config # This can likely be eliminated with path fixes in toolchain/Makefile $(OUT_DIR)/toolchain.tar: ARCH=$(ARCH) \ OUT_DIR=../$(OUT_DIR) \ DEBIAN_HASH=$(DEBIAN_HASH) \ $(MAKE) -C $(TOOLCHAIN_DIR) \ ../$(OUT_DIR)/toolchain.tar $(CONFIG_DIR)/busybox.config: $(call toolchain,$(USER), " \ cd /cache/busybox-$(BUSYBOX_VERSION) && \ KCONFIG_NOTIMESTAMP=1 make menuconfig && \ cp .config /config/busybox.config; \ ") $(CONFIG_DIR)/linux.config: $(call toolchain,$(USER)," \ cd /cache/linux-$(LINUX_VERSION) && \ make menuconfig && \ cp .config /config/linux.config; \ ") $(OUT_DIR)/busybox: \ $(CACHE_DIR)/busybox-$(BUSYBOX_VERSION) \ $(CACHE_DIR)/busybox-$(BUSYBOX_VERSION).tar.bz2 \ $(CACHE_DIR)/busybox-$(BUSYBOX_VERSION).tar.bz2.sig $(call toolchain,$(USER)," \ cd /cache/busybox-$(BUSYBOX_VERSION) && \ cp /config/busybox.config .config && \ make -j$(CPUS) busybox && \ cp busybox /out/; \ ") $(OUT_DIR)/sample_init: $(call toolchain,$(USER)," \ gcc \ -static \ -static-libgcc /src/sample/init.c \ -o /out/sample_init; \ ") $(CACHE_DIR)/linux-$(LINUX_VERSION)/usr/gen_init_cpio: \ $(CACHE_DIR)/linux-$(LINUX_VERSION) \ $(CACHE_DIR)/linux-$(LINUX_VERSION) \ $(CACHE_DIR)/linux-$(LINUX_VERSION).tar.xz \ $(CACHE_DIR)/linux-$(LINUX_VERSION).tar.sign $(call toolchain,$(USER)," \ cd /cache/linux-$(LINUX_VERSION) && \ gcc usr/gen_init_cpio.c -o usr/gen_init_cpio \ ") $(OUT_DIR)/rootfs.cpio: \ $(OUT_DIR)/busybox \ $(OUT_DIR)/sample_init \ $(CACHE_DIR)/linux-$(LINUX_VERSION)/usr/gen_init_cpio mkdir -p $(CACHE_DIR)/rootfs/bin ifeq ($(DEBUG), true) cp $(OUT_DIR)/sample_init $(CACHE_DIR)/rootfs/sample_init cp $(SCRIPTS_DIR)/busybox_init $(CACHE_DIR)/rootfs/init cp $(OUT_DIR)/busybox $(CACHE_DIR)/rootfs/bin/ else cp $(OUT_DIR)/sample_init $(CACHE_DIR)/rootfs/init endif $(call toolchain,$(USER)," \ cd /cache/rootfs && \ find . -mindepth 1 -execdir touch -hcd "@0" "{}" + && \ find . -mindepth 1 -printf '%P\0' && \ cd /cache/linux-$(LINUX_VERSION) && \ usr/gen_initramfs.sh -o /out/rootfs.cpio /config/rootfs.list && \ cpio -itv < /out/rootfs.cpio && \ sha256sum /out/rootfs.cpio; \ ") $(OUT_DIR)/bzImage: \ $(OUT_DIR)/rootfs.cpio $(call toolchain,$(USER)," \ cd /cache/linux-$(LINUX_VERSION) && \ cp /config/linux.config .config && \ make olddefconfig && \ make -j$(CPUS) ARCH=$(ARCH) bzImage && \ cp arch/x86_64/boot/bzImage /out/ && \ sha256sum /out/bzImage; \ ")