include/kernel-defaults.mk

   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
   8 ifneq ($(SOURCE_DATE_EPOCH),)
   9   ifndef DUMP
  10     KBUILD_BUILD_TIMESTAMP:=$(shell perl -e 'print scalar gmtime($(SOURCE_DATE_EPOCH))')
  11   endif
  12 endif
  13
  14 ifdef CONFIG_STRIP_KERNEL_EXPORTS
  15   KERNEL_MAKEOPTS += \
  16         EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h"
  17 endif
  18
  19 INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
  20
  21 ifneq (,$(KERNEL_CC))
  22   KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
  23 endif
  24
  25 export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
  26
  27 # defined in quilt.mk
  28 Kernel/Patch:=$(Kernel/Patch/Default)
  29
  30 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  31   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  32     define Kernel/Prepare/Default
  33         xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  34         $(Kernel/Patch)
  35         $(if $(QUILT),touch $(LINUX_DIR)/.quilt_used)
  36     endef
  37   else
  38     define Kernel/Prepare/Default
  39         xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  40     endef
  41   endif
  42 else
  43   define Kernel/Prepare/Default
  44         mkdir -p $(KERNEL_BUILD_DIR)
  45         if [ -d $(LINUX_DIR) ]; then \
  46                 rmdir $(LINUX_DIR); \
  47         fi
  48         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  49   endef
  50 endif
  51
  52 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  53   ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"")
  54     define Kernel/SetInitramfs/PreConfigure
  55         grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  56         echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
  57         echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  58     endef
  59   else
  60     define Kernel/SetInitramfs/PreConfigure
  61         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  62         echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR)/.config
  63     endef
  64   endif
  65
  66   define Kernel/SetInitramfs
  67         rm -f $(LINUX_DIR)/.config.prev
  68         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  69         $(call Kernel/SetInitramfs/PreConfigure)
  70         echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  71         echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  72         echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
  73         echo -e "$(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)" >> $(LINUX_DIR)/.config
  74         echo -e "$(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)" >> $(LINUX_DIR)/.config
  75         echo -e "$(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)" >> $(LINUX_DIR)/.config
  76         echo -e "$(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)" >> $(LINUX_DIR)/.config
  77         echo -e "$(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)" >> $(LINUX_DIR)/.config
  78         echo -e "$(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
  79   endef
  80 else
  81 endif
  82
  83 define Kernel/SetNoInitramfs
  84         mv $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.old
  85         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config.set
  86         echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config.set
  87 endef
  88
  89 define Kernel/Configure/Default
  90         rm -f $(LINUX_DIR)/localversion
  91         $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
  92 # copy CONFIG_KERNEL_* settings over to .config.target
  93         awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
  94         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
  95         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
  96         echo "CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $(LINUX_DIR)/.config.target
  97         $(SCRIPT_DIR)/package-metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config $(KERNEL_PATCHVER) > $(LINUX_DIR)/.config.override
  98         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config.set
  99         $(call Kernel/SetNoInitramfs)
 100         rm -rf $(KERNEL_BUILD_DIR)/modules
 101         cmp -s $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev || { \
 102                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config; \
 103                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev; \
 104         }
 105         $(_SINGLE) [ -d $(LINUX_DIR)/user_headers ] || $(KERNEL_MAKE) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
 106         grep '=[ym]' $(LINUX_DIR)/.config.set | LC_ALL=C sort | mkhash md5 > $(LINUX_DIR)/.vermagic
 107 endef
 108
 109 define Kernel/Configure/Initramfs
 110         $(call Kernel/SetInitramfs)
 111 endef
 112
 113 define Kernel/CompileModules/Default
 114         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
 115         +$(KERNEL_MAKE) modules
 116 endef
 117
 118 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 119
 120 # AMD64 shares the location with x86
 121 ifeq ($(LINUX_KARCH),x86_64)
 122 IMAGES_DIR:=../../x86/boot
 123 endif
 124
 125 define Kernel/CopyImage
 126         cmp -s $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug || { \
 127                 $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1); \
 128                 $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf; \
 129                 $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug; \
 130                 $(foreach k, \
 131                         $(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out vmlinux dtbs,$(KERNELNAME))), \
 132                         $(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1); \
 133                 ) \
 134         }
 135 endef
 136
 137 define Kernel/CompileImage/Default
 138         rm -f $(TARGET_DIR)/init
 139         +$(KERNEL_MAKE) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 140         $(call Kernel/CopyImage)
 141 endef
 142
 143 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
 144 define Kernel/CompileImage/Initramfs
 145         $(call Kernel/Configure/Initramfs)
 146         $(CP) $(GENERIC_PLATFORM_DIR)/other-files/init $(TARGET_DIR)/init
 147         rm -rf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/usr/initramfs_data.cpio*
 148         +$(KERNEL_MAKE) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 149         $(call Kernel/CopyImage,-initramfs)
 150 endef
 151 else
 152 define Kernel/CompileImage/Initramfs
 153 endef
 154 endif
 155
 156 define Kernel/Clean/Default
 157         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 158         rm -f $(LINUX_KERNEL)
 159         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 160 endef
 161
 162