linux/compile at next · notcarbide/linux · GitHub

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#!/usr/bin/make -f

# Build using LLVM
export LLVM = 1

# Disable to run without building kernel
BUILD_KERNEL = yes
# Disable to run without packaging kernel
PACKAGE_KERNEL = yes

# Set to configure llvm not installed by system
LLVM_DIR = /usr
export CPATH = $(LLVM_DIR)/bin/

ifneq ("$(LLVM_DIR)","/usr")
	export LDFLAGS = -L$(LLVM_DIR)/lib/
endif

# Define # of jobs and date
JOBS = $(shell grep processor /proc/cpuinfo|wc -l)
CDATE = $(shell date "+%Y-%m-%d")

# Defaults set to 64-bit
TARGET_CONFIG = bcm2711
ARCH = arm64
IMAGE = Image
KERNEL = kernel8

# Full clang Link Time Optimization
# Adds to compilation time
LTO_CONFIGS = scripts/config -e LTO_CLANG_FULL;

# Optional; Requires LLVM with -polly and compiler-rt support
OPT_CONFIGS = \
	scripts/config -e CC_OPTIMIZE_FOR_PERFORMANCE_O3_POLLY;

# Only 64-bit builds support CFI
LTO64_CONFIGS = \
	scripts/config -e CFI_CLANG; \
	scripts/config -e CFI_CLANG_SHADOW; \
	scripts/config -d CFI_PERMISSIVE;

EXTRA_CONFIGS := $(LTO_CONFIGS) $(OPT_CONFIGS)

define package_kernel
	mkdir -p out/$1/boot/overlays
	make INSTALL_MOD_PATH=out/$1 modules_install
	rm -rf out/$1/lib/modules/*/build
	rm -rf out/$1/lib/modules/*/source
	cp zap/install.sh out/$1/
if test $(ARCH) = arm64; then \
	cp arch/$(ARCH)/boot/dts/broadcom/*.dtb out/$1/boot/; \
else \
	cp arch/$(ARCH)/boot/dts/*.dtb out/$1/boot/; \
fi
	cp arch/$(ARCH)/boot/dts/overlays/*.dtb* out/$1/boot/overlays/
	cp arch/$(ARCH)/boot/dts/overlays/README out/$1/boot/overlays/
	cp arch/$(ARCH)/boot/$(IMAGE) out/$1/boot/$(KERNEL).img
	cd out/$1; zip -r zap-kernel_$1-$(CDATE).zip . -x '*.zip'
endef

default: rpi64

all: rpi64 rpi4 rpi2 rpi

rpi64:
	make ARCH=$(ARCH) $(TARGET_CONFIG)_defconfig
	@$(EXTRA_CONFIGS) $(LTO64_CONFIGS)
ifeq ($(BUILD_KERNEL),yes)
	make ARCH=$(ARCH) -j$(JOBS) $(IMAGE) modules dtbs
endif
ifeq ($(PACKAGE_KERNEL),yes)
	$(call package_kernel,$@)
endif

rpi4 rpi400:
	$(eval KERNEL = kernel7l)
	$(eval IMAGE = zImage)
	$(eval ARCH = arm)
	make ARCH=$(ARCH) $(TARGET_CONFIG)_defconfig
	@$(EXTRA_CONFIGS)
ifeq ($(BUILD_KERNEL),yes)
	make ARCH=$(ARCH) -j$(JOBS) $(IMAGE) modules dtbs
endif
ifeq ($(PACKAGE_KERNEL),yes)
	$(call package_kernel,$@)
endif

rpi2 rpi3 rpi02w:
	$(eval TARGET_CONFIG = bcm2709)
	$(eval KERNEL = kernel7)
	$(eval IMAGE = zImage)
	$(eval ARCH = arm)
	make ARCH=$(ARCH) $(TARGET_CONFIG)_defconfig
	@$(EXTRA_CONFIGS)
ifeq ($(BUILD_KERNEL),yes)
	make ARCH=$(ARCH) -j$(JOBS) $(IMAGE) modules dtbs
endif
ifeq ($(PACKAGE_KERNEL),yes)
	$(call package_kernel,$@)
endif

rpi rpi0 rpi0w:
	$(eval TARGET_CONFIG = bcmrpi)
	$(eval KERNEL = kernel)
	$(eval IMAGE = zImage)
	$(eval ARCH = arm)
	make ARCH=$(ARCH) $(TARGET_CONFIG)_defconfig
	@$(EXTRA_CONFIGS)
ifeq ($(BUILD_KERNEL),yes)
	make ARCH=$(ARCH) -j$(JOBS) $(IMAGE) modules dtbs
endif
ifeq ($(PACKAGE_KERNEL),yes)
	$(call package_kernel,$@)
endif

clean:
	rm -rf out

.PHONY: default all clean rpi64 rpi4 rpi400 rpi2 rpi3 rpi02w rpi rpi0 rpi0w