70 lines
1.8 KiB
Makefile
70 lines
1.8 KiB
Makefile
CORES := $(shell nproc)
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PWD := $(shell pwd)
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LINUX_DIR := $(PWD)/components/linux
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MUSL_DIR := $(PWD)/components/musl
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BUSYBOX_DIR := $(PWD)/components/busybox
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LINUX_CFG := $(LINUX_DIR)/.config
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MUSL_CFG := $(MUSL_DIR)/config.mak
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BUSYBOX_CFG := $(BUSYBOX_DIR)/.config
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LINUX_OUT := $(LINUX_DIR)/arch/x86/boot/bzImage
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MUSL_OUT := $(MUSL_DIR)/lib/libc.so
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BUSYBOX_OUT := $(BUSYBOX_DIR)/busybox
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DOWNLOAD_SCRIPT := $(PWD)/scripts/download-components.sh
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CONFIGS_DIR := $(PWD)/configs
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MUSL_GCC := "${REALGCC:-gcc}" "$@" -specs "$(MUSL_DIR)/lib/musl-gcc.specs"
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.PHONY: all deps linux busybox clean
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all: dirs deps linux busybox
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dirs:
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mkdir -p initramfs/{etc,proc,sys,usr/{bin,lib},dev,tmp,mnt,root}
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ln -sf usr/bin initramfs/bin
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ln -sf usr/bin initramfs/sbin
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ln -sf usr/lib initramfs/lib
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ln -sf usr/lib initramfs/lib64
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deps:
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@echo "Downloading dependencies..."
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@$(DOWNLOAD_SCRIPT)
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linux: $(LINUX_OUT)
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$(LINUX_OUT): $(LINUX_CFG)
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@echo "Building Linux kernel..."
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@$(MAKE) -C $(LINUX_DIR) -j $(CORES)
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$(LINUX_CFG):
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@echo "Copying Linux config..."
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@cp -r $(CONFIGS_DIR)/linux/. $(LINUX_DIR)/
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musl: $(MUSL_OUT)
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$(MUSL_SPECS): $(MUSL_OUT)
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$(MUSL_OUT): $(MUSL_CFG)
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make -C components/musl -j $(CORES)
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$(MUSL_CFG):
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@echo "Configuring musl..."
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cd components/musl && ./configure --prefix=/usr
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busybox: musl $(BUSYBOX_OUT)
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$(BUSYBOX_OUT): $(BUSYBOX_CFG)
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@echo "Building BusyBox..."
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@$(MAKE) -C $(BUSYBOX_DIR) -j $(CORES) CC="$(MUSL_GCC)"
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$(BUSYBOX_CFG):
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@echo "Copying BusyBox config..."
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@cp -r $(CONFIGS_DIR)/busybox/. $(BUSYBOX_DIR)/
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install: linux busybox
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@cp $(LINUX_OUT) cdroot/
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$(MAKE) -C $(BUSYBOX_DIR) install CONFIG_PREFIX=$(PWD)/initramfs -j $(CORES)
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clean:
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@echo "Cleaning up build artifacts..."
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@$(MAKE) -C $(LINUX_DIR) clean
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@$(MAKE) -C $(BUSYBOX_DIR) clean
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