68 lines
2.2 KiB
Makefile
68 lines
2.2 KiB
Makefile
MAKEFILE_DIR := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
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BUILD_DIR ?= $(MAKEFILE_DIR)build
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ARCH ?= x86
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KERNEL_FILE_NAME ?= bzImage
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KERNEL_PATH = $(BUILD_DIR)/arch/$(ARCH)/boot/$(bzImage)
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KERNEL_BUILD_DIR=$(BUILD_DIR)/linux/kernel
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BUSYBOX_BUILD_DIR=$(BUILD_DIR)/linux/busybox
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BUSYBOX_BUILD_FILE=$(BUSYBOX_BUILD_DIR)/busybox
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INITRAMFS_DIR=$(BUILD_DIR)/linux/initramfs
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INITRAMFS_FILE_TMP=$(BUILD_DIR)/linux/initramfs.cpio
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INITRAMFS_FILE=$(BUILD_DIR)/linux/initramfs.cpio.gz
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.PHONY: initramfs initramfs_initiial initramfs_clean busybox all kernel __busybox_install
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all: $(INITRAMFS_FILE)
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initramfs:initramfs_clean initramfs_initiial __busybox_install $(INITRAMFS_FILE)
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kernel: $(KERNEL_PATH)
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busybox: $(BUSYBOX_BUILD_FILE)
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$(KERNEL_PATH):
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@mkdir -p $(KERNEL_BUILD_DIR)
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$(MAKE) -C $(MAKEFILE_DIR)/kernel O=$(KERNEL_BUILD_DIR) KCONFIG_CONFIG="$(MAKEFILE_DIR)/.kernel-config"
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kernel-config:
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$(MAKE) -C $(MAKEFILE_DIR)/kernel O=$(KERNEL_BUILD_DIR) KCONFIG_CONFIG="$(MAKEFILE_DIR)/.kernel-config" menuconfig
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$(BUSYBOX_BUILD_FILE):
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@mkdir -p $(BUSYBOX_BUILD_DIR)
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cp $(MAKEFILE_DIR)/.busybox-config $(BUSYBOX_BUILD_DIR)/.config
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$(MAKE) -C $(MAKEFILE_DIR)/busybox O=$(BUSYBOX_BUILD_DIR) KCONFIG_CONFIG="$(MAKEFILE_DIR)/.busybox-config"
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__busybox_install:
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$(MAKE) -C $(MAKEFILE_DIR)/busybox O=$(BUSYBOX_BUILD_DIR) KCONFIG_CONFIG="$(MAKEFILE_DIR)/.busybox-config" CONFIG_PREFIX=$(INITRAMFS_DIR) install
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$(INITRAMFS_FILE): initramfs_clean initramfs_initiial __busybox_install
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find $(INITRAMFS_DIR) | cpio -o -H newc > $(INITRAMFS_FILE_TMP)
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# gzip -f $(INITRAMFS_FILE_TMP)
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initramfs_clean:
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@rm -rf $(INITRAMFS_DIR)
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initramfs_initiial: #$(BUSYBOX_BUILD_FILE)
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mkdir -p $(INITRAMFS_DIR)
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mkdir -p $(INITRAMFS_DIR)/{etc,mnt,proc,run,srv,tmp,var,boot,dev,home,media,opt,root,sbin,sys,usr/bin,usr/lib}
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bash -c "pushd $(INITRAMFS_DIR); ln -s usr/bin bin; popd"
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bash -c "pushd $(INITRAMFS_DIR); ln -s usr/lib lib; popd"
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echo "#!/bin/sh" >> $(INITRAMFS_DIR)/init
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echo "mount -t proc none /proc" >> $(INITRAMFS_DIR)/init
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echo "mount -t sysfs none /sys" >> $(INITRAMFS_DIR)/init
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echo "echo 'Successfully booted'" >> $(INITRAMFS_DIR)/init
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echo "exec /bin/sh" >> $(INITRAMFS_DIR)/init
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chmod +x $(INITRAMFS_DIR)/init
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chmod +x $(INITRAMFS_DIR)/sbin/init
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