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 ifneq ($(SOURCE_DATE_EPOCH),)
   9   ifndef DUMP
  10     KBUILD_BUILD_TIMESTAMP:=$(shell perl -e 'print scalar gmtime($(SOURCE_DATE_EPOCH))')
  11   endif
  12 endif
  13
  14 KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
  15         HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
  16         CROSS_COMPILE="$(KERNEL_CROSS)" \
  17         ARCH="$(LINUX_KARCH)" \
  18         KBUILD_HAVE_NLS=no \
  19         KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
  20         KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
  21         KBUILD_BUILD_TIMESTAMP="$(KBUILD_BUILD_TIMESTAMP)" \
  22         KBUILD_BUILD_VERSION="0" \
  23         HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib" \
  24         CONFIG_SHELL="$(BASH)" \
  25         $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
  26         $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID)) \
  27         cmd_syscalls=
  28
  29
  30 ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
  31   KERNEL_MAKEOPTS += \
  32         KERNELRELEASE=$(LINUX_VERSION)
  33 endif
  34
  35 ifdef CONFIG_STRIP_KERNEL_EXPORTS
  36   KERNEL_MAKEOPTS += \
  37         EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h"
  38 endif
  39
  40 INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
  41
  42 ifneq (,$(KERNEL_CC))
  43   KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
  44 endif
  45
  46 ifdef CONFIG_USE_SPARSE
  47   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
  48 endif
  49
  50 export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
  51
  52 # defined in quilt.mk
  53 Kernel/Patch:=$(Kernel/Patch/Default)
  54
  55 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  56   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  57     define Kernel/Prepare/Default
  58         xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  59         $(Kernel/Patch)
  60         $(if $(QUILT),touch $(LINUX_DIR)/.quilt_used)
  61     endef
  62   else
  63     define Kernel/Prepare/Default
  64         xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  65     endef
  66   endif
  67 else
  68   define Kernel/Prepare/Default
  69         mkdir -p $(KERNEL_BUILD_DIR)
  70         if [ -d $(LINUX_DIR) ]; then \
  71                 rmdir $(LINUX_DIR); \
  72         fi
  73         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  74   endef
  75 endif
  76
  77 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  78   ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"")
  79     define Kernel/SetInitramfs/PreConfigure
  80         grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  81         echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
  82         echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  83     endef
  84   else
  85     define Kernel/SetInitramfs/PreConfigure
  86         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  87         echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR)/.config
  88     endef
  89   endif
  90
  91   define Kernel/SetInitramfs
  92         rm -f $(LINUX_DIR)/.config.prev
  93         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  94         $(call Kernel/SetInitramfs/PreConfigure)
  95         echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  96         echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  97         echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
  98         echo -e "$(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)" >> $(LINUX_DIR)/.config
  99         echo -e "$(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)" >> $(LINUX_DIR)/.config
 100         echo -e "$(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)" >> $(LINUX_DIR)/.config
 101         echo -e "$(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)" >> $(LINUX_DIR)/.config
 102         echo -e "$(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)" >> $(LINUX_DIR)/.config
 103         echo -e "$(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
 104   endef
 105 else
 106 endif
 107
 108 define Kernel/SetNoInitramfs
 109         mv $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.old
 110         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config.set
 111         echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config.set
 112 endef
 113
 114 define Kernel/Configure/Default
 115         rm -f $(LINUX_DIR)/localversion
 116         $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
 117 # copy CONFIG_KERNEL_* settings over to .config.target
 118         awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
 119         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
 120         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
 121         echo "CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $(LINUX_DIR)/.config.target
 122         $(SCRIPT_DIR)/package-metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config $(KERNEL_PATCHVER) > $(LINUX_DIR)/.config.override
 123         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config.set
 124         $(call Kernel/SetNoInitramfs)
 125         rm -rf $(KERNEL_BUILD_DIR)/modules
 126         cmp -s $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev || { \
 127                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config; \
 128                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev; \
 129         }
 130         $(_SINGLE) [ -d $(LINUX_DIR)/user_headers ] || $(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
 131         grep '=[ym]' $(LINUX_DIR)/.config.set | LC_ALL=C sort | mkhash md5 > $(LINUX_DIR)/.vermagic
 132 endef
 133
 134 define Kernel/Configure/Initramfs
 135         $(call Kernel/SetInitramfs)
 136 endef
 137
 138 define Kernel/CompileModules/Default
 139         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
 140         +$(MAKE) $(KERNEL_MAKEOPTS) modules
 141 endef
 142
 143 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 144
 145 # AMD64 shares the location with x86
 146 ifeq ($(LINUX_KARCH),x86_64)
 147 IMAGES_DIR:=../../x86/boot
 148 endif
 149
 150 define Kernel/CopyImage
 151         cmp -s $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug || { \
 152                 $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1); \
 153                 $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf; \
 154                 $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug; \
 155                 $(foreach k, \
 156                         $(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out vmlinux dtbs,$(KERNELNAME))), \
 157                         $(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1); \
 158                 ) \
 159         }
 160 endef
 161
 162 define Kernel/CompileImage/Default
 163         rm -f $(TARGET_DIR)/init
 164         +$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 165         $(call Kernel/CopyImage)
 166 endef
 167
 168 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
 169 define Kernel/CompileImage/Initramfs
 170         $(call Kernel/Configure/Initramfs)
 171         $(CP) $(GENERIC_PLATFORM_DIR)/other-files/init $(TARGET_DIR)/init
 172         rm -rf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/usr/initramfs_data.cpio*
 173         +$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 174         $(call Kernel/CopyImage,-initramfs)
 175 endef
 176 else
 177 define Kernel/CompileImage/Initramfs
 178 endef
 179 endif
 180
 181 define Kernel/Clean/Default
 182         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 183         rm -f $(LINUX_KERNEL)
 184         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 185 endef
 186
 187