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