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 $(LINUX_DIR) \
   9         HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
  10         CROSS_COMPILE="$(KERNEL_CROSS)" \
  11         ARCH="$(LINUX_KARCH)" \
  12         KBUILD_HAVE_NLS=no \
  13         CONFIG_SHELL="$(BASH)" \
  14         $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='')
  15
  16 ifdef CONFIG_STRIP_KERNEL_EXPORTS
  17   KERNEL_MAKEOPTS += \
  18         EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h"
  19 endif
  20
  21 INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
  22
  23 ifneq (,$(KERNEL_CC))
  24   KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
  25 endif
  26
  27 export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
  28
  29 # defined in quilt.mk
  30 Kernel/Patch:=$(Kernel/Patch/Default)
  31 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  32   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  33     define Kernel/Prepare/Default
  34         xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  35         $(Kernel/Patch)
  36         touch $(LINUX_DIR)/.quilt_used
  37     endef
  38   else
  39     ifeq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"")
  40       define Kernel/Prepare/Default
  41         git clone $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  42       endef
  43     else
  44       define Kernel/Prepare/Default
  45         git clone --reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY) $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  46       endef
  47     endif
  48   endif
  49 else
  50   define Kernel/Prepare/Default
  51         mkdir -p $(KERNEL_BUILD_DIR)
  52         if [ -d $(LINUX_DIR) ]; then \
  53                 rmdir $(LINUX_DIR); \
  54         fi
  55         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  56   endef
  57 endif
  58
  59 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  60   ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"")
  61     define Kernel/SetInitramfs/PreConfigure
  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     endef
  66   else
  67     define Kernel/SetInitramfs/PreConfigure
  68         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  69         echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR)/.config
  70     endef
  71   endif
  72
  73   define Kernel/SetInitramfs
  74         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  75         $(call Kernel/SetInitramfs/PreConfigure)
  76         echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  77         echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  78         echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
  79         echo -e "$(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)" >> $(LINUX_DIR)/.config
  80         echo -e "$(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)" >> $(LINUX_DIR)/.config
  81         echo -e "$(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)" >> $(LINUX_DIR)/.config
  82         echo -e "$(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)" >> $(LINUX_DIR)/.config
  83         echo -e "$(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
  84   endef
  85 else
  86   define Kernel/SetInitramfs
  87         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  88         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  89         echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
  90   endef
  91 endif
  92
  93 define Kernel/Configure/Default
  94         $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
  95 # copy CONFIG_KERNEL_* settings over to .config.target
  96         awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
  97         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
  98         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
  99         echo "# CONFIG_KALLSYMS_UNCOMPRESSED is not set" >> $(LINUX_DIR)/.config.target
 100         echo "# CONFIG_KPROBES is not set" >> $(LINUX_DIR)/.config.target
 101         $(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config > $(LINUX_DIR)/.config.override
 102         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config
 103         $(call Kernel/SetInitramfs)
 104         rm -rf $(KERNEL_BUILD_DIR)/modules
 105         [ -d $(LINUX_DIR)/user_headers ] || $(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
 106         $(SH_FUNC) grep '=[ym]' $(LINUX_DIR)/.config | LC_ALL=C sort | md5s > $(LINUX_DIR)/.vermagic
 107 endef
 108
 109 define Kernel/CompileModules/Default
 110         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
 111         +$(MAKE) $(KERNEL_MAKEOPTS) modules
 112 endef
 113
 114 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 115
 116 define Kernel/CompileImage/Default
 117         $(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),,rm -f $(TARGET_DIR)/init)
 118         +$(MAKE) $(KERNEL_MAKEOPTS) $(subst ",,$(KERNELNAME))
 119         $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 120         $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf
 121 endef
 122
 123 define Kernel/Clean/Default
 124         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 125         rm -f $(LINUX_KERNEL)
 126         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 127 endef
 128
 129