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         $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1)
  14
  15 ifdef CONFIG_STRIP_KERNEL_EXPORTS
  16   KERNEL_MAKEOPTS += \
  17         EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h"
  18 endif
  19
  20 INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
  21
  22 ifneq (,$(KERNEL_CC))
  23   KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
  24 endif
  25
  26 export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
  27
  28 # defined in quilt.mk
  29 Kernel/Patch:=$(Kernel/Patch/Default)
  30 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  31   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  32     define Kernel/Prepare/Default
  33         bzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  34         $(Kernel/Patch)
  35         touch $(LINUX_DIR)/.quilt_used
  36     endef
  37   else
  38     ifeq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"")
  39 define Kernel/Prepare/Default
  40         git clone $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  41     endef
  42   else
  43     define Kernel/Prepare/Default
  44         git clone --reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY) $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  45     endef
  46   endif
  47 endif
  48 else
  49   define Kernel/Prepare/Default
  50         mkdir -p $(KERNEL_BUILD_DIR)
  51         if [ -d $(LINUX_DIR) ]; then \
  52                 rmdir $(LINUX_DIR); \
  53         fi
  54         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  55   endef
  56 endif
  57
  58 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  59   ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"")
  60     define Kernel/SetInitramfs
  61                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  62                 grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  63                 echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
  64                 echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  65                 echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  66                 echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  67                 echo "$(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     endef
  74   else
  75     define Kernel/SetInitramfs
  76                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  77                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  78                 echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR)/.config
  79                 echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  80                 echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  81                 echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
  82                 echo -e "$(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)" >> $(LINUX_DIR)/.config
  83                 echo -e "$(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)" >> $(LINUX_DIR)/.config
  84                 echo -e "$(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)" >> $(LINUX_DIR)/.config
  85                 echo -e "$(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)" >> $(LINUX_DIR)/.config
  86                 echo -e "$(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
  87     endef
  88   endif
  89 else
  90     define Kernel/SetInitramfs
  91                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  92                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  93                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
  94     endef
  95 endif
  96
  97 define Kernel/Configure/Default
  98         $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
  99 # copy CONFIG_KERNEL_* settings over to .config.target
 100         awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
 101         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
 102         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
 103         echo "# CONFIG_KPROBES is not set" >> $(LINUX_DIR)/.config.target
 104         $(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config > $(LINUX_DIR)/.config.override
 105         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config
 106         $(call Kernel/SetInitramfs)
 107         -$(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) oldconfig prepare scripts
 108         rm -rf $(KERNEL_BUILD_DIR)/modules
 109         $(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
 110         $(SH_FUNC) grep '=[ym]' $(LINUX_DIR)/.config | LC_ALL=C sort | md5s > $(LINUX_DIR)/.vermagic
 111 endef
 112
 113 define Kernel/CompileModules/Default
 114         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
 115         +$(MAKE) $(KERNEL_MAKEOPTS) modules
 116 endef
 117
 118 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 119
 120 define Kernel/CompileImage/Default
 121         $(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),,rm -f $(TARGET_DIR)/init)
 122         +$(MAKE) $(KERNEL_MAKEOPTS) $(KERNELNAME)
 123         $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 124         $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf
 125 endef
 126
 127 define Kernel/Clean/Default
 128         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 129         rm -f $(LINUX_KERNEL)
 130         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 131 endef
 132
 133