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="$(KERNEL_CC)"
  23 endif
  24
  25 # defined in quilt.mk
  26 Kernel/Patch:=$(Kernel/Patch/Default)
  27 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  28   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  29     define Kernel/Prepare/Default
  30         bzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  31         $(Kernel/Patch)
  32         touch $(LINUX_DIR)/.quilt_used
  33     endef
  34   else
  35     ifeq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"")
  36 define Kernel/Prepare/Default
  37         git clone $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  38     endef
  39   else
  40     define Kernel/Prepare/Default
  41         git clone --reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY) $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  42     endef
  43   endif
  44 endif
  45 else
  46   define Kernel/Prepare/Default
  47         mkdir -p $(KERNEL_BUILD_DIR)
  48         if [ -d $(LINUX_DIR) ]; then \
  49                 rmdir $(LINUX_DIR); \
  50         fi
  51         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  52   endef
  53 endif
  54
  55 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  56     define Kernel/SetInitramfs
  57                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  58                 grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  59                 echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
  60                 echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  61                 echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  62                 echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  63                 echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
  64                 echo -e "$(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)" >> $(LINUX_DIR)/.config
  65                 echo -e "$(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)" >> $(LINUX_DIR)/.config
  66                 echo -e "$(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)" >> $(LINUX_DIR)/.config
  67                 echo -e "$(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)" >> $(LINUX_DIR)/.config
  68                 echo -e "$(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
  69     endef
  70   else
  71     define Kernel/SetInitramfs
  72                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  73                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  74                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
  75     endef
  76 endif
  77
  78 define Kernel/Configure/Default
  79         $(LINUX_CONFCMD) > $(LINUX_DIR)/.config.target
  80 # copy CONFIG_KERNEL_* settings over to .config.target
  81         awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
  82         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
  83         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
  84         echo "# CONFIG_KPROBES is not set" >> $(LINUX_DIR)/.config.target
  85         $(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config > $(LINUX_DIR)/.config.override
  86         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config
  87         $(call Kernel/SetInitramfs)
  88         -$(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) oldconfig prepare scripts
  89         rm -rf $(KERNEL_BUILD_DIR)/modules
  90 endef
  91
  92 define Kernel/CompileModules/Default
  93         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
  94         +$(MAKE) $(KERNEL_MAKEOPTS) modules
  95 endef
  96
  97 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
  98
  99 define Kernel/CompileImage/Default
 100         $(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),,rm -f $(TARGET_DIR)/init)
 101         +$(MAKE) $(KERNEL_MAKEOPTS) $(KERNELNAME)
 102         $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 103         $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf
 104 endef
 105
 106 define Kernel/Clean/Default
 107         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 108         rm -f $(LINUX_KERNEL)
 109         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 110 endef
 111
 112