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