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