Root/include/kernel-defaults.mk

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
8KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
9    CROSS_COMPILE="$(KERNEL_CROSS)" \
10    ARCH="$(LINUX_KARCH)" \
11    KBUILD_HAVE_NLS=no \
12    CONFIG_SHELL="$(BASH)"
13
14ifdef CONFIG_STRIP_KERNEL_EXPORTS
15  KERNEL_MAKEOPTS += \
16    EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h"
17endif
18
19INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
20
21ifneq (,$(KERNEL_CC))
22  KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
23endif
24
25export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
26
27# defined in quilt.mk
28Kernel/Patch:=$(Kernel/Patch/Default)
29ifeq ($(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)),"")
38define 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
46endif
47else
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) $(LINUX_DIR)
54  endef
55endif
56
57ifeq ($(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
78endif
79
80define 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
92endef
93
94define Kernel/CompileModules/Default
95    rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
96    +$(MAKE) $(KERNEL_MAKEOPTS) modules
97endef
98
99OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
100
101define Kernel/CompileImage/Default
102    $(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),,rm -f $(TARGET_DIR)/init)
103    +$(MAKE) $(KERNEL_MAKEOPTS) $(KERNELNAME)
104    $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
105    $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf
106endef
107
108define Kernel/Clean/Default
109    rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
110    rm -f $(LINUX_KERNEL)
111    $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
112endef
113
114
115

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