209 lines
9.6 KiB
Makefile
209 lines
9.6 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0-only
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#
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# Copyright (C) 2006-2020 OpenWrt.org
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ifdef CONFIG_STRIP_KERNEL_EXPORTS
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KERNEL_MAKEOPTS_IMAGE += \
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EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h"
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endif
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INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
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export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
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# defined in quilt.mk
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Kernel/Patch:=$(Kernel/Patch/Default)
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ifneq (,$(findstring .xz,$(LINUX_SOURCE)))
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LINUX_CAT:=xzcat
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else
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LINUX_CAT:=$(STAGING_DIR_HOST)/bin/libdeflate-gzip -dc
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endif
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ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
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ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
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define Kernel/Prepare/Default
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$(LINUX_CAT) $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
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$(Kernel/Patch)
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$(if $(QUILT),touch $(LINUX_DIR)/.quilt_used)
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endef
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else
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define Kernel/Prepare/Default
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$(LINUX_CAT) $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
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endef
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endif
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else
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define Kernel/Prepare/Default
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mkdir -p $(KERNEL_BUILD_DIR)
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if [ -d $(LINUX_DIR) ]; then \
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rmdir $(LINUX_DIR); \
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fi
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ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
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if [ -d $(LINUX_DIR)/user_headers ]; then \
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rm -rf $(LINUX_DIR)/user_headers; \
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fi
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endef
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endif
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ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
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ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE),y)
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define Kernel/SetInitramfs/PreConfigure
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grep -v -e CONFIG_BLK_DEV_INITRD $(2)/.config.old > $(2)/.config
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echo 'CONFIG_BLK_DEV_INITRD=y' >> $(2)/.config
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echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(2)/.config
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endef
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else
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ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"")
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define Kernel/SetInitramfs/PreConfigure
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grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(2)/.config.old > $(2)/.config
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echo 'CONFIG_BLK_DEV_INITRD=y' >> $(2)/.config
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echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(1) $(INITRAMFS_EXTRA_FILES))"' >> $(2)/.config
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endef
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else
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define Kernel/SetInitramfs/PreConfigure
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grep -v INITRAMFS $(2)/.config.old > $(2)/.config
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echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(2)/.config
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endef
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endif
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endif
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define Kernel/SetInitramfs
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rm -f $(2)/.config.prev
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mv $(2)/.config $(2)/.config.old
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$(call Kernel/SetInitramfs/PreConfigure,$(1),$(2))
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echo "# CONFIG_INITRAMFS_PRESERVE_MTIME is not set" >> $(2)/.config
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ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE),y)
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echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(2)/.config
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echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(2)/.config
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echo "$(if $(CONFIG_TARGET_INITRAMFS_FORCE),CONFIG_INITRAMFS_FORCE=y,# CONFIG_INITRAMFS_FORCE is not set)" >> $(2)/.config
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else
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echo "# CONFIG_INITRAMFS_FORCE is not set" >> $(2)/.config
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endif
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echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(2)/.config
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$(foreach ALGO,GZIP BZIP2 LZMA LZO XZ LZ4 ZSTD, \
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$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_$(ALGO)),\
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echo -e "CONFIG_INITRAMFS_COMPRESSION_$(ALGO)=y\nCONFIG_RD_$(ALGO)=y" >> $(2)/.config;,\
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echo -e "# CONFIG_INITRAMFS_COMPRESSION_$(ALGO) is not set\n# CONFIG_RD_$(ALGO) is not set" >> $(2)/.config;))
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endef
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else
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endif
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define Kernel/SetNoInitramfs
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mv $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.old
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grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config.set
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echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config.set
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echo '# CONFIG_INITRAMFS_FORCE is not set' >> $(LINUX_DIR)/.config.set
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echo "# CONFIG_INITRAMFS_PRESERVE_MTIME is not set" >> $(LINUX_DIR)/.config.set
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endef
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define Kernel/Configure/Default
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rm -f $(LINUX_DIR)/localversion
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$(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
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# copy CONFIG_KERNEL_* settings over to .config.target
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awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
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echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
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echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
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echo "CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $(LINUX_DIR)/.config.target
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$(SCRIPT_DIR)/package-metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config $(KERNEL_PATCHVER) > $(LINUX_DIR)/.config.override
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$(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config.set
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$(call Kernel/SetNoInitramfs)
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rm -rf $(KERNEL_BUILD_DIR)/modules
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cmp -s $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev || { \
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cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config; \
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cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev; \
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}
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$(_SINGLE) [ -d $(LINUX_DIR)/user_headers ] || $(KERNEL_MAKE) $(if $(findstring uml,$(BOARD)),ARCH=$(ARCH)) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
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grep '=[ym]' $(LINUX_DIR)/.config.set | LC_ALL=C sort | $(MKHASH) md5 > $(LINUX_DIR)/.vermagic
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endef
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define Kernel/Configure/Initramfs
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$(call Kernel/SetInitramfs,$(1),$(2))
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endef
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define Kernel/CompileModules/Default
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rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
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+$(KERNEL_MAKE) $(if $(KERNELNAME),$(KERNELNAME),all) modules
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# If .config did not change, use the previous timestamp to avoid package rebuilds
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cmp -s $(LINUX_DIR)/.config $(LINUX_DIR)/.config.modules.save && \
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mv $(LINUX_DIR)/.config.modules.save $(LINUX_DIR)/.config; \
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$(CP) $(LINUX_DIR)/.config $(LINUX_DIR)/.config.modules.save
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endef
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OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
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# AMD64 shares the location with x86
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ifeq ($(LINUX_KARCH),x86_64)
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IMAGES_DIR:=../../x86/boot
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endif
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# $1: image suffix
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# $2: Per Device Rootfs ID
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define Kernel/CopyImage
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cmp -s $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug$(2) || { \
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$(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1)$(2); \
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$(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf$(2); \
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$(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug$(2); \
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$(foreach k, \
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$(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out vmlinux dtbs,$(KERNELNAME))), \
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$(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1)$(2); \
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) \
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}
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endef
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define Kernel/CompileImage/Default
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rm -f $(TARGET_DIR)/init
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+$(KERNEL_MAKE) $(KERNEL_MAKEOPTS_IMAGE) $(if $(KERNELNAME),$(KERNELNAME),all)
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$(call Kernel/CopyImage)
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endef
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define Kernel/PrepareConfigPerRootfs
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[ ! -d "$(1)" ] || rm -rf $(1)
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mkdir $(1)
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$(CP) $(LINUX_DIR)/.config $(1)
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endef
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ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
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# $1: Custom TARGET_DIR. If omitted TARGET_DIR is used.
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# $2: If defined Generate Per Rootfs Kernel Directory and use it
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# For Separate Initramf with $2 declared, skip kernel compile, it has
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# already been done previously on generic image build
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define Kernel/CompileImage/Initramfs
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$(if $(2),$(call Kernel/PrepareConfigPerRootfs,$(LINUX_DIR)$(2)))
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$(call Kernel/Configure/Initramfs,$(if $(1),$(1),$(TARGET_DIR)),$(LINUX_DIR)$(2))
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$(CP) $(GENERIC_PLATFORM_DIR)/other-files/init $(if $(1),$(1),$(TARGET_DIR))/init
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$(if $(SOURCE_DATE_EPOCH),touch -hcd "@$(SOURCE_DATE_EPOCH)" $(if $(1),$(1),$(TARGET_DIR)) $(if $(1),$(1),$(TARGET_DIR))/init)
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ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE),y)
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ifneq ($(call qstrip,$(CONFIG_EXTERNAL_CPIO)),)
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$(CP) $(CONFIG_EXTERNAL_CPIO) $(KERNEL_BUILD_DIR)/initrd.cpio$(2)
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else
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( cd $(if $(1),$(1),$(TARGET_DIR)); find . | LC_ALL=C sort | $(STAGING_DIR_HOST)/bin/cpio --reproducible -o -H newc -R 0:0 > $(if $(2),$(LINUX_DIR)$(2),$(KERNEL_BUILD_DIR))/initrd.cpio )
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endif
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$(if $(SOURCE_DATE_EPOCH),touch -hcd "@$(SOURCE_DATE_EPOCH)" $(if $(2),$(LINUX_DIR)$(2),$(KERNEL_BUILD_DIR))/initrd.cpio)
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$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_BZIP2),$(STAGING_DIR_HOST)/bin/bzip2 -9 -c < $(if $(2),$(LINUX_DIR)$(2),$(KERNEL_BUILD_DIR))/initrd.cpio > $(if $(2),$(LINUX_DIR)$(2),$(KERNEL_BUILD_DIR))/initrd.cpio.bzip2)
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$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_GZIP),$(STAGING_DIR_HOST)/bin/libdeflate-gzip -n -f -S .gzip -12 $(if $(2),$(LINUX_DIR)$(2),$(KERNEL_BUILD_DIR))/initrd.cpio)
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$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZ4),$(STAGING_DIR_HOST)/bin/lz4c -l -c1 -fz --favor-decSpeed $(if $(2),$(LINUX_DIR)$(2),$(KERNEL_BUILD_DIR))/initrd.cpio)
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$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA),$(STAGING_DIR_HOST)/bin/lzma e -lc1 -lp2 -pb2 $(if $(2),$(LINUX_DIR)$(2),$(KERNEL_BUILD_DIR))/initrd.cpio $(if $(2),$(LINUX_DIR)$(2),$(KERNEL_BUILD_DIR))/initrd.cpio.lzma)
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$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO),$(STAGING_DIR_HOST)/bin/lzop -9 -f $(if $(2),$(LINUX_DIR)$(2),$(KERNEL_BUILD_DIR))/initrd.cpio)
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$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ),$(STAGING_DIR_HOST)/bin/xz -T$(if $(filter 1,$(NPROC)),2,0) -9 -fz --check=crc32 $(if $(2),$(LINUX_DIR)$(2),$(KERNEL_BUILD_DIR))/initrd.cpio)
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$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD),$(STAGING_DIR_HOST)/bin/zstd -T0 -f -o $(if $(2),$(LINUX_DIR)$(2),$(KERNEL_BUILD_DIR))/initrd.cpio.zstd $(if $(2),$(LINUX_DIR)$(2),$(KERNEL_BUILD_DIR))/initrd.cpio)
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$(if $(2),,$(KERNEL_MAKE) $(KERNEL_MAKEOPTS_IMAGE) $(if $(KERNELNAME),$(KERNELNAME),all))
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$(call Kernel/CopyImage,-initramfs,$(2))
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else
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+$(call locked,$(if $(2),$(CP) $(LINUX_DIR)$(2)/.config* $(LINUX_DIR) && touch $(LINUX_DIR)/.config && )\
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rm -rf $(LINUX_DIR)/usr/initramfs_data.cpio* $(LINUX_DIR)/.config.prev && \
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$(KERNEL_MAKE) $(KERNEL_MAKEOPTS_IMAGE) $(if $(KERNELNAME),$(KERNELNAME),all) && \
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{ $(call Kernel/CopyImage,-initramfs,$(2)) },gen-initramfs)
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endif
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endef
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else
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define Kernel/CompileImage/Initramfs
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endef
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endif
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define Kernel/Clean/Default
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rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
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rm -f $(LINUX_KERNEL)
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$(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
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endef
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