2 # Copyright (C) 2006-2011 OpenWrt.org
4 # This is free software, licensed under the GNU General Public License v2.
5 # See /LICENSE for more information.
8 KERNEL_MAKEOPTS
:= -C
$(LINUX_DIR
) \
9 HOSTCFLAGS
="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
10 CROSS_COMPILE
="$(KERNEL_CROSS)" \
11 ARCH
="$(LINUX_KARCH)" \
13 CONFIG_SHELL
="$(BASH)" \
14 $(if
$(findstring c
,$(OPENWRT_VERBOSE
)),V
=1,V
='')
16 ifdef CONFIG_STRIP_KERNEL_EXPORTS
18 EXTRA_LDSFLAGS
="-I$(KERNEL_BUILD_DIR) -include symtab.h"
21 INITRAMFS_EXTRA_FILES ?
= $(GENERIC_PLATFORM_DIR
)/image
/initramfs-base-files.txt
24 KERNEL_MAKEOPTS
+= CC
="$(KERNEL_CC)"
27 export HOST_EXTRACFLAGS
=-I
$(STAGING_DIR_HOST
)/include
30 Kernel
/Patch
:=$(Kernel
/Patch
/Default
)
31 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE
)),"")
32 ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI
)),"")
33 define Kernel
/Prepare
/Default
34 bzcat
$(DL_DIR
)/$(LINUX_SOURCE
) |
$(TAR
) -C
$(KERNEL_BUILD_DIR
) $(TAR_OPTIONS
)
36 touch
$(LINUX_DIR
)/.quilt_used
39 ifeq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY
)),"")
40 define Kernel
/Prepare
/Default
41 git clone
$(CONFIG_KERNEL_GIT_CLONE_URI
) $(LINUX_DIR
)
44 define Kernel
/Prepare
/Default
45 git clone
--reference
$(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY
) $(CONFIG_KERNEL_GIT_CLONE_URI
) $(LINUX_DIR
)
50 define Kernel
/Prepare
/Default
51 mkdir
-p
$(KERNEL_BUILD_DIR
)
52 if
[ -d
$(LINUX_DIR
) ]; then \
55 ln
-s
$(CONFIG_EXTERNAL_KERNEL_TREE
) $(LINUX_DIR
)
59 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS
),y
)
60 ifeq ($(strip $(CONFIG_EXTERNAL_CPIO
)),"")
61 define Kernel
/SetInitramfs
/PreConfigure
62 grep
-v
-e INITRAMFS
-e CONFIG_RD_
-e CONFIG_BLK_DEV_INITRD
$(LINUX_DIR
)/.config.old
> $(LINUX_DIR
)/.config
63 echo
'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR
)/.config
64 echo
'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR
)/.config
67 define Kernel
/SetInitramfs
/PreConfigure
68 grep
-v INITRAMFS
$(LINUX_DIR
)/.config.old
> $(LINUX_DIR
)/.config
69 echo
'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR
)/.config
73 define Kernel
/SetInitramfs
74 mv
$(LINUX_DIR
)/.config
$(LINUX_DIR
)/.config.old
75 $(call Kernel
/SetInitramfs
/PreConfigure
)
76 echo
'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR
)/.config
77 echo
'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR
)/.config
78 echo
"$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR
)/.config
79 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
80 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
81 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
82 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
83 echo
-e
"$(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
86 define Kernel
/SetInitramfs
87 mv
$(LINUX_DIR
)/.config
$(LINUX_DIR
)/.config.old
88 grep
-v INITRAMFS
$(LINUX_DIR
)/.config.old
> $(LINUX_DIR
)/.config
89 echo
'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR
)/.config
93 define Kernel
/Configure
/Default
94 $(LINUX_CONF_CMD
) > $(LINUX_DIR
)/.config.target
95 # copy CONFIG_KERNEL_* settings over to .config.target
96 awk
'/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR
)/.config
>> $(LINUX_DIR
)/.config.target
97 echo
"# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR
)/.config.target
98 echo
"# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR
)/.config.target
99 echo
"# CONFIG_KPROBES is not set" >> $(LINUX_DIR
)/.config.target
100 $(SCRIPT_DIR
)/metadata.pl kconfig
$(TMP_DIR
)/.packageinfo
$(TOPDIR
)/.config
> $(LINUX_DIR
)/.config.
override
101 $(SCRIPT_DIR
)/kconfig.pl
'm+' '+' $(LINUX_DIR
)/.config.target
/dev
/null
$(LINUX_DIR
)/.config.
override > $(LINUX_DIR
)/.config
102 $(call Kernel
/SetInitramfs
)
103 rm -rf
$(KERNEL_BUILD_DIR
)/modules
104 [ -d
$(LINUX_DIR
)/user_headers
] ||
$(MAKE
) $(KERNEL_MAKEOPTS
) INSTALL_HDR_PATH
=$(LINUX_DIR
)/user_headers headers_install
105 $(SH_FUNC
) grep
'=[ym]' $(LINUX_DIR
)/.config | LC_ALL
=C
sort | md5s
> $(LINUX_DIR
)/.vermagic
108 define Kernel
/CompileModules
/Default
109 rm -f
$(LINUX_DIR
)/vmlinux
$(LINUX_DIR
)/System.map
110 +$(MAKE
) $(KERNEL_MAKEOPTS
) modules
113 OBJCOPY_STRIP
= -R .reginfo
-R .notes
-R .note
-R .comment
-R .mdebug
-R .note.gnu.build-id
115 define Kernel
/CompileImage
/Default
116 $(if
$(CONFIG_TARGET_ROOTFS_INITRAMFS
),,rm -f
$(TARGET_DIR
)/init
)
117 +$(MAKE
) $(KERNEL_MAKEOPTS
) $(subst ",,$(KERNELNAME))
118 $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
119 $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf
122 define Kernel/Clean/Default
123 rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
124 rm -f $(LINUX_KERNEL)
125 $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean