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
  28 ifdef CONFIG_STRIP_KERNEL_EXPORTS
  29   KERNEL_MAKEOPTS += \
  30         EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h"
  31 endif
  32
  33 INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
  34
  35 ifneq (,$(KERNEL_CC))
  36   KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
  37 endif
  38
  39 ifdef CONFIG_USE_SPARSE
  40   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
  41 endif
  42
  43 ifneq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  44  KERNEL_MAKEOPTS += LOCALVERSION=
  45 endif
  46
  47 export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
  48
  49 # defined in quilt.mk
  50 Kernel/Patch:=$(Kernel/Patch/Default)
  51
  52 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  53   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  54     define Kernel/Prepare/Default
  55         xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  56         $(Kernel/Patch)
  57         $(if $(QUILT),touch $(LINUX_DIR)/.quilt_used)
  58     endef
  59   else
  60     define Kernel/Prepare/Default
  61         xzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  62     endef
  63   endif
  64 else
  65   define Kernel/Prepare/Default
  66         mkdir -p $(KERNEL_BUILD_DIR)
  67         if [ -d $(LINUX_DIR) ]; then \
  68                 rmdir $(LINUX_DIR); \
  69         fi
  70         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  71   endef
  72 endif
  73
  74 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  75   ifeq ($(strip $(CONFIG_EXTERNAL_CPIO)),"")
  76     define Kernel/SetInitramfs/PreConfigure
  77         grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  78         echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
  79         echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  80     endef
  81   else
  82     define Kernel/SetInitramfs/PreConfigure
  83         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  84         echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR)/.config
  85     endef
  86   endif
  87
  88   define Kernel/SetInitramfs
  89         rm -f $(LINUX_DIR)/.config.prev
  90         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  91         $(call Kernel/SetInitramfs/PreConfigure)
  92         echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  93         echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  94         echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config
  95         echo -e "$(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)" >> $(LINUX_DIR)/.config
  96         echo -e "$(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)" >> $(LINUX_DIR)/.config
  97         echo -e "$(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)" >> $(LINUX_DIR)/.config
  98         echo -e "$(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)" >> $(LINUX_DIR)/.config
  99         echo -e "$(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)" >> $(LINUX_DIR)/.config
 100         echo -e "$(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
 101   endef
 102 else
 103 endif
 104
 105 define Kernel/SetNoInitramfs
 106         mv $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.old
 107         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config.set
 108         echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config.set
 109 endef
 110
 111 define Kernel/Configure/Default
 112         rm -f $(LINUX_DIR)/localversion
 113         $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
 114 # copy CONFIG_KERNEL_* settings over to .config.target
 115         awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target
 116         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
 117         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
 118         echo "CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $(LINUX_DIR)/.config.target
 119         $(SCRIPT_DIR)/package-metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config $(KERNEL_PATCHVER) > $(LINUX_DIR)/.config.override
 120         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config.set
 121         $(call Kernel/SetNoInitramfs)
 122         rm -rf $(KERNEL_BUILD_DIR)/modules
 123         cmp -s $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev || { \
 124                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config; \
 125                 cp $(LINUX_DIR)/.config.set $(LINUX_DIR)/.config.prev; \
 126         }
 127         $(_SINGLE) [ -d $(LINUX_DIR)/user_headers ] || $(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
 128         grep '=[ym]' $(LINUX_DIR)/.config.set | LC_ALL=C sort | mkhash md5 > $(LINUX_DIR)/.vermagic
 129 endef
 130
 131 define Kernel/Configure/Initramfs
 132         $(call Kernel/SetInitramfs)
 133 endef
 134
 135 define Kernel/CompileModules/Default
 136         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
 137         +$(MAKE) $(KERNEL_MAKEOPTS) modules
 138 endef
 139
 140 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 141
 142 # AMD64 shares the location with x86
 143 ifeq ($(LINUX_KARCH),x86_64)
 144 IMAGES_DIR:=../../x86/boot
 145 endif
 146
 147 define Kernel/CopyImage
 148         cmp -s $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug || { \
 149                 $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)$(1); \
 150                 $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).elf; \
 151                 $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux$(1).debug; \
 152                 $(foreach k, \
 153                         $(if $(KERNEL_IMAGES),$(KERNEL_IMAGES),$(filter-out dtbs,$(KERNELNAME))), \
 154                         $(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1); \
 155                 ) \
 156         }
 157 endef
 158
 159 define Kernel/CompileImage/Default
 160         rm -f $(TARGET_DIR)/init
 161         +$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 162         $(call Kernel/CopyImage)
 163 endef
 164
 165 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
 166 define Kernel/CompileImage/Initramfs
 167         $(call Kernel/Configure/Initramfs)
 168         $(CP) $(GENERIC_PLATFORM_DIR)/base-files/init $(TARGET_DIR)/init
 169         rm -rf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/usr/initramfs_data.cpio*
 170         +$(MAKE) $(KERNEL_MAKEOPTS) $(if $(KERNELNAME),$(KERNELNAME),all) modules
 171         $(call Kernel/CopyImage,-initramfs)
 172 endef
 173 else
 174 define Kernel/CompileImage/Initramfs
 175 endef
 176 endif
 177
 178 define Kernel/Clean/Default
 179         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 180         rm -f $(LINUX_KERNEL)
 181         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 182 endef
 183
 184