include/kernel-defaults.mk

   1 #
   2 # Copyright (C) 2006-2015 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         KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
  14         KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
  15         CONFIG_SHELL="$(BASH)" \
  16         $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
  17         $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID))
  18
  19 ifdef CONFIG_STRIP_KERNEL_EXPORTS
  20   KERNEL_MAKEOPTS += \
  21         EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h"
  22 endif
  23
  24 INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
  25
  26 ifneq (,$(KERNEL_CC))
  27   KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
  28 endif
  29
  30 ifdef CONFIG_USE_SPARSE
  31   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
  32 endif
  33
  34 export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
  35
  36 # defined in quilt.mk
  37 Kernel/Patch:=$(Kernel/Patch/Default)
  38
  39 KERNEL_GIT_OPTS:=
  40 ifneq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"")
  41   KERNEL_GIT_OPTS+=--reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)
  42 endif
  43
  44 ifneq ($(strip $(CONFIG_KERNEL_GIT_BRANCH)),"")
  45   KERNEL_GIT_OPTS+=--branch $(CONFIG_KERNEL_GIT_BRANCH)
  46 endif
  47
  48 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  49   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  50     define Kernel/Prepare/Default
  51         xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  52         $(Kernel/Patch)
  53         touch $(LINUX_DIR)/.quilt_used
  54     endef
  55   else
  56     define Kernel/Prepare/Default
  57         git clone $(KERNEL_GIT_OPTS) $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  58     endef
  59   endif
  60 else
  61   define Kernel/Prepare/Default
  62         mkdir -p $(KERNEL_BUILD_DIR)
  63         if [ -d $(LINUX_DIR) ]; then \
  64                 rmdir $(LINUX_DIR); \
  65         fi
  66         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  67   endef
  68 endif
  69
  70 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  71   ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"")
  72     define Kernel/SetInitramfs/PreConfigure
  73         grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  74         echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
  75         echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  76     endef
  77   else
  78     define Kernel/SetInitramfs/PreConfigure
  79         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  80         echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR)/.config
  81     endef
  82   endif
  83
  84   define Kernel/SetInitramfs
  85         rm -f $(LINUX_DIR)/.config.prev
  86         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  87         $(call Kernel/SetInitramfs/PreConfigure)
  88         echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  89         echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  90         echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
  91         echo -e "$(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)" >> $(LINUX_DIR)/.config
  92         echo -e "$(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)" >> $(LINUX_DIR)/.config
  93         echo -e "$(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)" >> $(LINUX_DIR)/.config
  94         echo -e "$(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)" >> $(LINUX_DIR)/.config
  95         echo -e "$(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)" >> $(LINUX_DIR)/.config
  96         echo -e "$(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
  97   endef
  98 else
  99 endif
 100
 101 define Kernel/SetNoInitramfs
 102         mv $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.old
 103         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config.set
 104         echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config.set
 105 endef
 106
 107 ifeq ($(CONFIG_KERNEL_ROOT_NFS),y)
 108   define Kernel/SetNfsCmdline
 109         rm -f $(LINUX_DIR)/.config.prev
 110         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 111         grep -v "CONFIG_CMDLINE=" $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 112         grep "CONFIG_CMDLINE=" $(LINUX_DIR)/.config.old | cut -d\" -f2 | sed 's/root=\/dev\/\([a-z0-9]*\)\(.*\)/CONFIG_CMDLINE=\"root=\/dev\/nfs ip=dhcp\2\"/' >> $(LINUX_DIR)/.config
 113   endef
 114 else
 115   define Kernel/SetNfsCmdline
 116   endef
 117 endif
 118
 119 define Kernel/Configure/Default
 120         $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
 121 # copy CONFIG_KERNEL_* settings over to .config.target
 122         awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
 123         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
 124         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
 125         echo "CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $(LINUX_DIR)/.config.target
 126         $(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config $(KERNEL_PATCHVER) > $(LINUX_DIR)/.config.override
 127         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config.set
 128         $(call Kernel/SetNoInitramfs)
 129         $(call Kernel/SetNfsCmdline)
 130         rm -rf $(KERNEL_BUILD_DIR)/modules
 131         cmp -s $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev || { \
 132                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config; \
 133                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev; \
 134         }
 135         $(_SINGLE) [ -d $(LINUX_DIR)/user_headers ] || $(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
 136         $(SH_FUNC) grep '=[ym]' $(LINUX_DIR)/.config.set | LC_ALL=C sort | md5s > $(LINUX_DIR)/.vermagic
 137 endef
 138
 139 define Kernel/Configure/Initramfs
 140         $(call Kernel/SetInitramfs)
 141 endef
 142
 143 define Kernel/CompileModules/Default
 144         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
 145         +$(MAKE) $(KERNEL_MAKEOPTS) modules
 146 endef
 147
 148 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 149
 150 # AMD64 shares the location with x86
 151 ifeq ($(LINUX_KARCH),x86_64)
 152 IMAGES_DIR:=../../x86/boot
 153 endif
 154
 155 define Kernel/CopyImage
 156         cmp -s $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug || { \
 157                 $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1); \
 158                 $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf; \
 159                 $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug; \
 160                 $(foreach k, \
 161                         $(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out dtbs,$(KERNELNAME))), \
 162                         $(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1); \
 163                 ) \
 164         }
 165 endef
 166
 167 define Kernel/CompileImage/Default
 168         rm -f $(TARGET_DIR)/init
 169         +$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 170         $(call Kernel/CopyImage)
 171 endef
 172
 173 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
 174 define Kernel/CompileImage/Initramfs
 175         $(call Kernel/Configure/Initramfs)
 176         $(CP) $(GENERIC_PLATFORM_DIR)/base-files/init $(TARGET_DIR)/init
 177         rm -rf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/usr/initramfs_data.cpio*
 178         +$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 179         $(call Kernel/CopyImage,-initramfs)
 180 endef
 181 else
 182 define Kernel/CompileImage/Initramfs
 183 endef
 184 endif
 185
 186 define Kernel/Clean/Default
 187         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 188         rm -f $(LINUX_KERNEL)
 189         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 190 endef
 191
 192