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="$(KERNEL_CC)"
  25 endif
  26
  27 ifdef CONFIG_USE_SPARSE
  28   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
  29 endif
  30
  31 export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
  32
  33 # defined in quilt.mk
  34 Kernel/Patch:=$(Kernel/Patch/Default)
  35
  36 KERNEL_GIT_OPTS:=
  37 ifneq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"")
  38   KERNEL_GIT_OPTS+=--reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)
  39 endif
  40
  41 ifneq ($(strip $(CONFIG_KERNEL_GIT_BRANCH)),"")
  42   KERNEL_GIT_OPTS+=--branch $(CONFIG_KERNEL_GIT_BRANCH)
  43 endif
  44
  45 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  46   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  47     define Kernel/Prepare/Default
  48         xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  49         $(Kernel/Patch)
  50         touch $(LINUX_DIR)/.quilt_used
  51     endef
  52   else
  53     define Kernel/Prepare/Default
  54         git clone $(KERNEL_GIT_OPTS) $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  55     endef
  56   endif
  57 else
  58   define Kernel/Prepare/Default
  59         mkdir -p $(KERNEL_BUILD_DIR)
  60         if [ -d $(LINUX_DIR) ]; then \
  61                 rmdir $(LINUX_DIR); \
  62         fi
  63         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  64   endef
  65 endif
  66
  67 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  68   ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"")
  69     define Kernel/SetInitramfs/PreConfigure
  70         grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  71         echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
  72         echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  73     endef
  74   else
  75     define Kernel/SetInitramfs/PreConfigure
  76         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  77         echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR)/.config
  78     endef
  79   endif
  80
  81   define Kernel/SetInitramfs
  82         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  83         $(call Kernel/SetInitramfs/PreConfigure)
  84         echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  85         echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  86         echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
  87         echo -e "$(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)" >> $(LINUX_DIR)/.config
  88         echo -e "$(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)" >> $(LINUX_DIR)/.config
  89         echo -e "$(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)" >> $(LINUX_DIR)/.config
  90         echo -e "$(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)" >> $(LINUX_DIR)/.config
  91         echo -e "$(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)" >> $(LINUX_DIR)/.config
  92         echo -e "$(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
  93   endef
  94 else
  95 endif
  96
  97 define Kernel/SetNoInitramfs
  98         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  99         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 100         echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
 101 endef
 102
 103 define Kernel/Configure/Default
 104         $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
 105 # copy CONFIG_KERNEL_* settings over to .config.target
 106         awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
 107         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
 108         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
 109         echo "# CONFIG_KALLSYMS_UNCOMPRESSED is not set" >> $(LINUX_DIR)/.config.target
 110         echo "# CONFIG_KPROBES is not set" >> $(LINUX_DIR)/.config.target
 111         $(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config > $(LINUX_DIR)/.config.override
 112         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config
 113         $(call Kernel/SetNoInitramfs)
 114         rm -rf $(KERNEL_BUILD_DIR)/modules
 115         $(_SINGLE) [ -d $(LINUX_DIR)/user_headers ] || $(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
 116         $(SH_FUNC) grep '=[ym]' $(LINUX_DIR)/.config | LC_ALL=C sort | md5s > $(LINUX_DIR)/.vermagic
 117 endef
 118
 119 define Kernel/Configure/Initramfs
 120         $(call Kernel/SetInitramfs)
 121 endef
 122
 123 define Kernel/CompileModules/Default
 124         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
 125         +$(MAKE) $(KERNEL_MAKEOPTS) modules
 126 endef
 127
 128 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 129
 130 # AVR32 uses a non-standard location
 131 ifeq ($(LINUX_KARCH),avr32)
 132 IMAGES_DIR:=images
 133 endif
 134
 135 # AMD64 shares the location with x86
 136 ifeq ($(LINUX_KARCH),x86_64)
 137 IMAGES_DIR:=../../x86/boot
 138 endif
 139
 140 define Kernel/CopyImage
 141         $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1)
 142         $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf
 143         $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.debug
 144 ifneq ($(KERNELNAME),)
 145         $(foreach k,$(filter-out dtbs,$(KERNELNAME)),$(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1);)
 146 endif
 147 endef
 148
 149 define Kernel/CompileImage/Default
 150         rm -f $(TARGET_DIR)/init
 151         +$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 152         $(call Kernel/CopyImage)
 153 endef
 154
 155 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
 156 define Kernel/CompileImage/Initramfs
 157         $(call Kernel/Configure/Initramfs)
 158         $(CP) $(GENERIC_PLATFORM_DIR)/base-files/init $(TARGET_DIR)/init
 159         rm -rf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/usr/initramfs_data.cpio*
 160         +$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 161         $(call Kernel/CopyImage,-initramfs)
 162 endef
 163 else
 164 define Kernel/CompileImage/Initramfs
 165 endef
 166 endif
 167
 168 define Kernel/Clean/Default
 169         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 170         rm -f $(LINUX_KERNEL)
 171         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 172 endef
 173
 174