| 1 | # |
| 2 | # Copyright (C) 2006-2011 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 $(LINUX_DIR) \ |
| 9 | CROSS_COMPILE="$(KERNEL_CROSS)" \ |
| 10 | ARCH="$(LINUX_KARCH)" \ |
| 11 | KBUILD_HAVE_NLS=no \ |
| 12 | CONFIG_SHELL="$(BASH)" |
| 13 | |
| 14 | ifdef CONFIG_STRIP_KERNEL_EXPORTS |
| 15 | KERNEL_MAKEOPTS += \ |
| 16 | EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h" |
| 17 | endif |
| 18 | |
| 19 | INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt |
| 20 | |
| 21 | ifneq (,$(KERNEL_CC)) |
| 22 | KERNEL_MAKEOPTS += CC="$(KERNEL_CC)" |
| 23 | endif |
| 24 | |
| 25 | export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include |
| 26 | |
| 27 | # defined in quilt.mk |
| 28 | Kernel/Patch:=$(Kernel/Patch/Default) |
| 29 | ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"") |
| 30 | ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"") |
| 31 | define Kernel/Prepare/Default |
| 32 | bzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS) |
| 33 | $(Kernel/Patch) |
| 34 | touch $(LINUX_DIR)/.quilt_used |
| 35 | endef |
| 36 | else |
| 37 | ifeq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"") |
| 38 | define Kernel/Prepare/Default |
| 39 | git clone $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR) |
| 40 | endef |
| 41 | else |
| 42 | define Kernel/Prepare/Default |
| 43 | git clone --reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY) $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR) |
| 44 | endef |
| 45 | endif |
| 46 | endif |
| 47 | else |
| 48 | define Kernel/Prepare/Default |
| 49 | mkdir -p $(KERNEL_BUILD_DIR) |
| 50 | if [ -d $(LINUX_DIR) ]; then \ |
| 51 | rmdir $(LINUX_DIR); \ |
| 52 | fi |
| 53 | ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR) |
| 54 | endef |
| 55 | endif |
| 56 | |
| 57 | ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y) |
| 58 | define Kernel/SetInitramfs |
| 59 | mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old |
| 60 | grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config |
| 61 | echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config |
| 62 | echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config |
| 63 | echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config |
| 64 | echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config |
| 65 | echo "$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR)/.config |
| 66 | echo -e "$(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)" >> $(LINUX_DIR)/.config |
| 67 | echo -e "$(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)" >> $(LINUX_DIR)/.config |
| 68 | echo -e "$(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)" >> $(LINUX_DIR)/.config |
| 69 | echo -e "$(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)" >> $(LINUX_DIR)/.config |
| 70 | echo -e "$(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 |
| 71 | endef |
| 72 | else |
| 73 | define Kernel/SetInitramfs |
| 74 | mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old |
| 75 | grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config |
| 76 | echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config |
| 77 | endef |
| 78 | endif |
| 79 | |
| 80 | define Kernel/Configure/Default |
| 81 | $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target |
| 82 | # copy CONFIG_KERNEL_* settings over to .config.target |
| 83 | awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target |
| 84 | echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target |
| 85 | echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target |
| 86 | echo "# CONFIG_KPROBES is not set" >> $(LINUX_DIR)/.config.target |
| 87 | $(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config > $(LINUX_DIR)/.config.override |
| 88 | $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config |
| 89 | $(call Kernel/SetInitramfs) |
| 90 | -$(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) oldconfig prepare scripts |
| 91 | rm -rf $(KERNEL_BUILD_DIR)/modules |
| 92 | $(SH_FUNC) grep '=[ym]' $(LINUX_DIR)/.config | LC_ALL=C sort | md5s > $(LINUX_DIR)/.vermagic |
| 93 | endef |
| 94 | |
| 95 | define Kernel/CompileModules/Default |
| 96 | rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map |
| 97 | +$(MAKE) $(KERNEL_MAKEOPTS) modules |
| 98 | endef |
| 99 | |
| 100 | OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id |
| 101 | |
| 102 | define Kernel/CompileImage/Default |
| 103 | $(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),,rm -f $(TARGET_DIR)/init) |
| 104 | +$(MAKE) $(KERNEL_MAKEOPTS) $(KERNELNAME) |
| 105 | $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL) |
| 106 | $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf |
| 107 | endef |
| 108 | |
| 109 | define Kernel/Clean/Default |
| 110 | rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured |
| 111 | rm -f $(LINUX_KERNEL) |
| 112 | $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean |
| 113 | endef |
| 114 | |
| 115 | |
| 116 | |
