include/kernel-defaults.mk

   1 #
   2 # Copyright (C) 2006-2011 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 KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
   9         CROSS_COMPILE="$(KERNEL_CROSS)" \
  10         ARCH="$(LINUX_KARCH)" \
  11         KBUILD_HAVE_NLS=no \
  12         CONFIG_SHELL="$(BASH)"
  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:=$(Kernel/Patch/Default)
  29 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  30   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  31     define Kernel/Prepare/Default
  32         bzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  33         $(Kernel/Patch)
  34         touch $(LINUX_DIR)/.quilt_used
  35     endef
  36   else
  37     ifeq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"")
  38 define Kernel/Prepare/Default
  39         git clone $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  40     endef
  41   else
  42     define Kernel/Prepare/Default
  43         git clone --reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY) $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  44     endef
  45   endif
  46 endif
  47 else
  48   define Kernel/Prepare/Default
  49         mkdir -p $(KERNEL_BUILD_DIR)
  50         if [ -d $(LINUX_DIR) ]; then \
  51                 rmdir $(LINUX_DIR); \
  52         fi
  53         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  54   endef
  55 endif
  56
  57 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  58     define Kernel/SetInitramfs
  59                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  60                 grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  61                 echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
  62                 echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  63                 echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  64                 echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  65                 echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
  66                 echo -e "$(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)" >> $(LINUX_DIR)/.config
  67                 echo -e "$(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)" >> $(LINUX_DIR)/.config
  68                 echo -e "$(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)" >> $(LINUX_DIR)/.config
  69                 echo -e "$(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)" >> $(LINUX_DIR)/.config
  70                 echo -e "$(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
  71     endef
  72   else
  73     define Kernel/SetInitramfs
  74                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  75                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  76                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
  77     endef
  78 endif
  79
  80 define Kernel/Configure/Default
  81         $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
  82 # copy CONFIG_KERNEL_* settings over to .config.target
  83         awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
  84         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
  85         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
  86         echo "# CONFIG_KPROBES is not set" >> $(LINUX_DIR)/.config.target
  87         $(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config > $(LINUX_DIR)/.config.override
  88         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config
  89         $(call Kernel/SetInitramfs)
  90         -$(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) oldconfig prepare scripts
  91         rm -rf $(KERNEL_BUILD_DIR)/modules
  92         $(SH_FUNC) grep '=[ym]' $(LINUX_DIR)/.config | LC_ALL=C sort | md5s > $(LINUX_DIR)/.vermagic
  93 endef
  94
  95 define Kernel/CompileModules/Default
  96         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
  97         +$(MAKE) $(KERNEL_MAKEOPTS) modules
  98 endef
  99
 100 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 101
 102 define Kernel/CompileImage/Default
 103         $(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),,rm -f $(TARGET_DIR)/init)
 104         +$(MAKE) $(KERNEL_MAKEOPTS) $(KERNELNAME)
 105         $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 106         $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf
 107 endef
 108
 109 define Kernel/Clean/Default
 110         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 111         rm -f $(LINUX_KERNEL)
 112         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 113 endef
 114
 115