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         KERNELRELEASE=$(LINUX_VERSION) \
  28         cmd_syscalls=
  29
  30 ifdef CONFIG_STRIP_KERNEL_EXPORTS
  31   KERNEL_MAKEOPTS += \
  32         EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h"
  33 endif
  34
  35 INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
  36
  37 ifneq (,$(KERNEL_CC))
  38   KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
  39 endif
  40
  41 ifdef CONFIG_USE_SPARSE
  42   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
  43 endif
  44
  45 export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
  46
  47 # defined in quilt.mk
  48 Kernel/Patch:=$(Kernel/Patch/Default)
  49
  50 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  51   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  52     define Kernel/Prepare/Default
  53         xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  54         $(Kernel/Patch)
  55         $(if $(QUILT),touch $(LINUX_DIR)/.quilt_used)
  56     endef
  57   else
  58     define Kernel/Prepare/Default
  59         xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  60     endef
  61   endif
  62 else
  63   define Kernel/Prepare/Default
  64         mkdir -p $(KERNEL_BUILD_DIR)
  65         if [ -d $(LINUX_DIR) ]; then \
  66                 rmdir $(LINUX_DIR); \
  67         fi
  68         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  69   endef
  70 endif
  71
  72 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  73   ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"")
  74     define Kernel/SetInitramfs/PreConfigure
  75         grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  76         echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
  77         echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  78     endef
  79   else
  80     define Kernel/SetInitramfs/PreConfigure
  81         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  82         echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR)/.config
  83     endef
  84   endif
  85
  86   define Kernel/SetInitramfs
  87         rm -f $(LINUX_DIR)/.config.prev
  88         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  89         $(call Kernel/SetInitramfs/PreConfigure)
  90         echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  91         echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  92         echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
  93         echo -e "$(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)" >> $(LINUX_DIR)/.config
  94         echo -e "$(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)" >> $(LINUX_DIR)/.config
  95         echo -e "$(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)" >> $(LINUX_DIR)/.config
  96         echo -e "$(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)" >> $(LINUX_DIR)/.config
  97         echo -e "$(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)" >> $(LINUX_DIR)/.config
  98         echo -e "$(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
  99   endef
 100 else
 101 endif
 102
 103 define Kernel/SetNoInitramfs
 104         mv $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.old
 105         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config.set
 106         echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config.set
 107 endef
 108
 109 define Kernel/Configure/Default
 110         rm -f $(LINUX_DIR)/localversion
 111         $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
 112 # copy CONFIG_KERNEL_* settings over to .config.target
 113         awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
 114         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
 115         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
 116         echo "CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $(LINUX_DIR)/.config.target
 117         $(SCRIPT_DIR)/package-metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config $(KERNEL_PATCHVER) > $(LINUX_DIR)/.config.override
 118         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config.set
 119         $(call Kernel/SetNoInitramfs)
 120         rm -rf $(KERNEL_BUILD_DIR)/modules
 121         cmp -s $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev || { \
 122                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config; \
 123                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev; \
 124         }
 125         $(_SINGLE) [ -d $(LINUX_DIR)/user_headers ] || $(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
 126         grep '=[ym]' $(LINUX_DIR)/.config.set | LC_ALL=C sort | mkhash md5 > $(LINUX_DIR)/.vermagic
 127 endef
 128
 129 define Kernel/Configure/Initramfs
 130         $(call Kernel/SetInitramfs)
 131 endef
 132
 133 define Kernel/CompileModules/Default
 134         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
 135         +$(MAKE) $(KERNEL_MAKEOPTS) modules
 136 endef
 137
 138 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 139
 140 # AMD64 shares the location with x86
 141 ifeq ($(LINUX_KARCH),x86_64)
 142 IMAGES_DIR:=../../x86/boot
 143 endif
 144
 145 define Kernel/CopyImage
 146         cmp -s $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug || { \
 147                 $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1); \
 148                 $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf; \
 149                 $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug; \
 150                 $(foreach k, \
 151                         $(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out vmlinux dtbs,$(KERNELNAME))), \
 152                         $(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1); \
 153                 ) \
 154         }
 155 endef
 156
 157 define Kernel/CompileImage/Default
 158         rm -f $(TARGET_DIR)/init
 159         +$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 160         $(call Kernel/CopyImage)
 161 endef
 162
 163 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
 164 define Kernel/CompileImage/Initramfs
 165         $(call Kernel/Configure/Initramfs)
 166         $(CP) $(GENERIC_PLATFORM_DIR)/other-files/init $(TARGET_DIR)/init
 167         rm -rf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/usr/initramfs_data.cpio*
 168         +$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 169         $(call Kernel/CopyImage,-initramfs)
 170 endef
 171 else
 172 define Kernel/CompileImage/Initramfs
 173 endef
 174 endif
 175
 176 define Kernel/Clean/Default
 177         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 178         rm -f $(LINUX_KERNEL)
 179         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 180 endef
 181
 182