1# 2# Copyright (C) 2006-2015 OpenWrt.org 3# 4# This is free software, licensed under the GNU General Public License v2. 5# See /LICENSE for more information. 6# 7 8KERNEL_MAKEOPTS := -C $(LINUX_DIR) \ 9 HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \ 10 CROSS_COMPILE="$(KERNEL_CROSS)" \ 11 ARCH="$(LINUX_KARCH)" \ 12 KBUILD_HAVE_NLS=no \ 13 KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \ 14 KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \ 15 CONFIG_SHELL="$(BASH)" \ 16 $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \ 17 $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID)) 18 19ifdef CONFIG_STRIP_KERNEL_EXPORTS 20 KERNEL_MAKEOPTS += \ 21 EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h" 22endif 23 24INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt 25 26ifneq (,$(KERNEL_CC)) 27 KERNEL_MAKEOPTS += CC="$(KERNEL_CC)" 28endif 29 30ifdef CONFIG_USE_SPARSE 31 KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse 32endif 33 34export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include 35 36# defined in quilt.mk 37Kernel/Patch:=$(Kernel/Patch/Default) 38 39KERNEL_GIT_OPTS:= 40ifneq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"") 41 KERNEL_GIT_OPTS+=--reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY) 42endif 43 44ifneq ($(strip $(CONFIG_KERNEL_GIT_BRANCH)),"") 45 KERNEL_GIT_OPTS+=--branch $(CONFIG_KERNEL_GIT_BRANCH) 46endif 47 48ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"") 49 ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"") 50 define Kernel/Prepare/Default 51 xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS) 52 $(Kernel/Patch) 53 touch $(LINUX_DIR)/.quilt_used 54 endef 55 else 56 define Kernel/Prepare/Default 57 git clone $(KERNEL_GIT_OPTS) $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR) 58 endef 59 endif 60else 61 define Kernel/Prepare/Default 62 mkdir -p $(KERNEL_BUILD_DIR) 63 if [ -d $(LINUX_DIR) ]; then \ 64 rmdir $(LINUX_DIR); \ 65 fi 66 ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR) 67 endef 68endif 69 70ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y) 71 ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"") 72 define Kernel/SetInitramfs/PreConfigure 73 grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config 74 echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config 75 echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config 76 endef 77 else 78 define Kernel/SetInitramfs/PreConfigure 79 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config 80 echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR)/.config 81 endef 82 endif 83 84 define Kernel/SetInitramfs 85 rm -f $(LINUX_DIR)/.config.prev 86 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old 87 $(call Kernel/SetInitramfs/PreConfigure) 88 echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config 89 echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config 90 echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config 91 echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_GZIP),CONFIG_INITRAMFS_COMPRESSION_GZIP=y\nCONFIG_RD_GZIP=y,# CONFIG_INITRAMFS_COMPRESSION_GZIP is not set\n# CONFIG_RD_GZIP is not set)" >> $(LINUX_DIR)/.config 92 echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_BZIP2),CONFIG_INITRAMFS_COMPRESSION_BZIP2=y\nCONFIG_RD_BZIP2=y,# CONFIG_INITRAMFS_COMPRESSION_BZIP2 is not set\n# CONFIG_RD_BZIP2 is not set)" >> $(LINUX_DIR)/.config 93 echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA),CONFIG_INITRAMFS_COMPRESSION_LZMA=y\nCONFIG_RD_LZMA=y,# CONFIG_INITRAMFS_COMPRESSION_LZMA is not set\n# CONFIG_RD_LZMA is not set)" >> $(LINUX_DIR)/.config 94 echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO),CONFIG_INITRAMFS_COMPRESSION_LZO=y\nCONFIG_RD_LZO=y,# CONFIG_INITRAMFS_COMPRESSION_LZO is not set\n# CONFIG_RD_LZO is not set)" >> $(LINUX_DIR)/.config 95 echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ),CONFIG_INITRAMFS_COMPRESSION_XZ=y\nCONFIG_RD_XZ=y,# CONFIG_INITRAMFS_COMPRESSION_XZ is not set\n# CONFIG_RD_XZ is not set)" >> $(LINUX_DIR)/.config 96 echo -e "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZ4),CONFIG_INITRAMFS_COMPRESSION_LZ4=y\nCONFIG_RD_LZ4=y,# CONFIG_INITRAMFS_COMPRESSION_LZ4 is not set\n# CONFIG_RD_LZ4 is not set)" >> $(LINUX_DIR)/.config 97 endef 98else 99endif 100 101define Kernel/SetNoInitramfs 102 mv $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.old 103 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config.set 104 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config.set 105endef 106 107define Kernel/Configure/Default 108 $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target 109# copy CONFIG_KERNEL_* settings over to .config.target 110 awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target 111 echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target 112 echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target 113 echo "CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $(LINUX_DIR)/.config.target 114 $(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config $(KERNEL_PATCHVER) > $(LINUX_DIR)/.config.override 115 $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config.set 116 $(call Kernel/SetNoInitramfs) 117 rm -rf $(KERNEL_BUILD_DIR)/modules 118 cmp -s $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev || { \ 119 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config; \ 120 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev; \ 121 } 122 $(_SINGLE) [ -d $(LINUX_DIR)/user_headers ] || $(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install 123 $(SH_FUNC) grep '=[ym]' $(LINUX_DIR)/.config.set | LC_ALL=C sort | md5s > $(LINUX_DIR)/.vermagic 124endef 125 126define Kernel/Configure/Initramfs 127 $(call Kernel/SetInitramfs) 128endef 129 130define Kernel/CompileModules/Default 131 rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map 132 +$(MAKE) $(KERNEL_MAKEOPTS) modules 133endef 134 135OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id 136 137# AMD64 shares the location with x86 138ifeq ($(LINUX_KARCH),x86_64) 139IMAGES_DIR:=../../x86/boot 140endif 141 142define Kernel/CopyImage 143 cmp -s $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug || { \ 144 $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1); \ 145 $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf; \ 146 $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug; \ 147 $(foreach k, \ 148 $(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out dtbs,$(KERNELNAME))), \ 149 $(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1); \ 150 ) \ 151 } 152endef 153 154define Kernel/CompileImage/Default 155 rm -f $(TARGET_DIR)/init 156 +$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules 157 $(call Kernel/CopyImage) 158endef 159 160ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),) 161define Kernel/CompileImage/Initramfs 162 $(call Kernel/Configure/Initramfs) 163 $(CP) $(GENERIC_PLATFORM_DIR)/base-files/init $(TARGET_DIR)/init 164 rm -rf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/usr/initramfs_data.cpio* 165 +$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules 166 $(call Kernel/CopyImage,-initramfs) 167endef 168else 169define Kernel/CompileImage/Initramfs 170endef 171endif 172 173define Kernel/Clean/Default 174 rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured 175 rm -f $(LINUX_KERNEL) 176 $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean 177endef 178 179 180