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 xzcat
$(DL_DIR
)/$(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)" >> $(LINUX_DIR
)/.config
84 echo
-e
"$(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
89 define Kernel
/SetNoInitramfs
90 mv
$(LINUX_DIR
)/.config
$(LINUX_DIR
)/.config.old
91 grep
-v INITRAMFS
$(LINUX_DIR
)/.config.old
> $(LINUX_DIR
)/.config
92 echo
'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR
)/.config
95 define Kernel
/Configure
/Default
96 $(LINUX_CONF_CMD
) > $(LINUX_DIR
)/.config.target
97 # copy CONFIG_KERNEL_* settings over to .config.target
98 awk
'/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR
)/.config
>> $(LINUX_DIR
)/.config.target
99 echo
"# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR
)/.config.target
100 echo
"# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR
)/.config.target
101 echo
"# CONFIG_KALLSYMS_UNCOMPRESSED is not set" >> $(LINUX_DIR
)/.config.target
102 echo
"# CONFIG_KPROBES is not set" >> $(LINUX_DIR
)/.config.target
103 $(SCRIPT_DIR
)/metadata.pl kconfig
$(TMP_DIR
)/.packageinfo
$(TOPDIR
)/.config
> $(LINUX_DIR
)/.config.
override
104 $(SCRIPT_DIR
)/kconfig.pl
'm+' '+' $(LINUX_DIR
)/.config.target
/dev
/null
$(LINUX_DIR
)/.config.
override > $(LINUX_DIR
)/.config
105 $(call Kernel
/SetNoInitramfs
)
106 rm -rf
$(KERNEL_BUILD_DIR
)/modules
107 $(_SINGLE
) [ -d
$(LINUX_DIR
)/user_headers
] ||
$(MAKE
) $(KERNEL_MAKEOPTS
) INSTALL_HDR_PATH
=$(LINUX_DIR
)/user_headers headers_install
108 $(SH_FUNC
) grep
'=[ym]' $(LINUX_DIR
)/.config | LC_ALL
=C
sort | md5s
> $(LINUX_DIR
)/.vermagic
111 define Kernel
/Configure
/Initramfs
112 $(call Kernel
/SetInitramfs
)
115 define Kernel
/CompileModules
/Default
116 rm -f
$(LINUX_DIR
)/vmlinux
$(LINUX_DIR
)/System.map
117 +$(MAKE
) $(KERNEL_MAKEOPTS
) modules
120 OBJCOPY_STRIP
= -R .reginfo
-R .notes
-R .note
-R .comment
-R .mdebug
-R .note.gnu.build-id
122 # AVR32 uses a non-standard location
123 ifeq ($(LINUX_KARCH
),avr32
)
127 # AMD64 shares the location with x86
128 ifeq ($(LINUX_KARCH
),x86_64
)
129 IMAGES_DIR
:=..
/..
/x86
/boot
132 define Kernel
/CopyImage
133 $(KERNEL_CROSS
)objcopy
-O binary
$(OBJCOPY_STRIP
) -S
$(LINUX_DIR
)/vmlinux
$(LINUX_KERNEL
)$(1)
134 $(KERNEL_CROSS
)objcopy
$(OBJCOPY_STRIP
) -S
$(LINUX_DIR
)/vmlinux
$(KERNEL_BUILD_DIR
)/vmlinux
$(1).elf
135 ifneq ($(subst ",,$(KERNELNAME)),)
137 $(foreach k
,$(filter-out dtbs
,$(subst ",,$(KERNELNAME))),$(CP) $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/$(IMAGES_DIR)/$(k) $(KERNEL_BUILD_DIR)/$(k)$(1);)
142 define Kernel
/CompileImage
/Default
143 rm -f
$(TARGET_DIR
)/init
144 +$(MAKE
) $(KERNEL_MAKEOPTS
) $(subst ",,$(KERNELNAME))
146 $(call Kernel
/CopyImage
)
149 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS
),)
150 define Kernel
/CompileImage
/Initramfs
151 $(call Kernel
/Configure
/Initramfs
)
152 $(CP
) $(GENERIC_PLATFORM_DIR
)/base-files
/init
$(TARGET_DIR
)/init
153 rm -rf
$(KERNEL_BUILD_DIR
)/linux-
$(LINUX_VERSION
)/usr
/initramfs_data.cpio
*
154 +$(MAKE
) $(KERNEL_MAKEOPTS
) $(subst ",,$(KERNELNAME))
157 $(call Kernel
/CopyImage
,-initramfs
)
160 define Kernel
/CompileImage
/Initramfs
164 define Kernel
/Clean
/Default
165 rm -f
$(KERNEL_BUILD_DIR
)/linux-
$(LINUX_VERSION
)/.configured
166 rm -f
$(LINUX_KERNEL
)
167 $(_SINGLE
)$(MAKE
) -C
$(KERNEL_BUILD_DIR
)/linux-
$(LINUX_VERSION
) clean