2 # Copyright (C) 2006-2015 OpenWrt.org
4 # This is free software, licensed under the GNU General Public License v2.
5 # See /LICENSE for more information.
8 ifneq ($(SOURCE_DATE_EPOCH
),)
10 KBUILD_BUILD_TIMESTAMP
:=$(shell perl
-e
'print scalar gmtime($(SOURCE_DATE_EPOCH))')
14 KERNEL_MAKEOPTS
:= -C
$(LINUX_DIR
) \
15 HOSTCFLAGS
="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
16 CROSS_COMPILE
="$(KERNEL_CROSS)" \
17 ARCH
="$(LINUX_KARCH)" \
19 KBUILD_BUILD_USER
="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
20 KBUILD_BUILD_HOST
="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
21 KBUILD_BUILD_TIMESTAMP
="$(KBUILD_BUILD_TIMESTAMP)" \
22 KBUILD_BUILD_VERSION
="0" \
23 HOST_LOADLIBES
="-L$(STAGING_DIR_HOST)/lib" \
24 CONFIG_SHELL
="$(BASH)" \
25 $(if
$(findstring c
,$(OPENWRT_VERBOSE
)),V
=1,V
='') \
26 $(if
$(PKG_BUILD_ID
),LDFLAGS_MODULE
=--build-id
=0x
$(PKG_BUILD_ID
))
28 ifdef CONFIG_STRIP_KERNEL_EXPORTS
30 EXTRA_LDSFLAGS
="-I$(KERNEL_BUILD_DIR) -include symtab.h"
33 INITRAMFS_EXTRA_FILES ?
= $(GENERIC_PLATFORM_DIR
)/image
/initramfs-base-files.txt
36 KERNEL_MAKEOPTS
+= CC
="$(KERNEL_CC)"
39 ifdef CONFIG_USE_SPARSE
40 KERNEL_MAKEOPTS
+= C
=1 CHECK
=$(STAGING_DIR_HOST
)/bin
/sparse
43 ifneq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI
)),"")
44 KERNEL_MAKEOPTS
+= LOCALVERSION
=
47 export HOST_EXTRACFLAGS
=-I
$(STAGING_DIR_HOST
)/include
50 Kernel
/Patch
:=$(Kernel
/Patch
/Default
)
53 ifneq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY
)),"")
54 KERNEL_GIT_OPTS
+=--reference
$(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY
)
57 ifneq ($(strip $(CONFIG_KERNEL_GIT_BRANCH
)),"")
58 KERNEL_GIT_OPTS
+=--branch
$(CONFIG_KERNEL_GIT_BRANCH
)
61 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE
)),"")
62 ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI
)),"")
63 define Kernel
/Prepare
/Default
64 xzcat
$(DL_DIR
)/$(LINUX_SOURCE
) |
$(TAR
) -C
$(KERNEL_BUILD_DIR
) $(TAR_OPTIONS
)
66 $(if
$(QUILT
),touch
$(LINUX_DIR
)/.quilt_used
)
69 define Kernel
/Prepare
/Default
70 git clone
$(KERNEL_GIT_OPTS
) $(CONFIG_KERNEL_GIT_CLONE_URI
) $(LINUX_DIR
)
74 define Kernel
/Prepare
/Default
75 mkdir
-p
$(KERNEL_BUILD_DIR
)
76 if
[ -d
$(LINUX_DIR
) ]; then \
79 ln
-s
$(CONFIG_EXTERNAL_KERNEL_TREE
) $(LINUX_DIR
)
83 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS
),y
)
84 ifeq ($(strip $(CONFIG_EXTERNAL_CPIO
)),"")
85 define Kernel
/SetInitramfs
/PreConfigure
86 grep
-v
-e INITRAMFS
-e CONFIG_RD_
-e CONFIG_BLK_DEV_INITRD
$(LINUX_DIR
)/.config.old
> $(LINUX_DIR
)/.config
87 echo
'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR
)/.config
88 echo
'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR
)/.config
91 define Kernel
/SetInitramfs
/PreConfigure
92 grep
-v INITRAMFS
$(LINUX_DIR
)/.config.old
> $(LINUX_DIR
)/.config
93 echo
'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR
)/.config
97 define Kernel
/SetInitramfs
98 rm -f
$(LINUX_DIR
)/.config.prev
99 mv
$(LINUX_DIR
)/.config
$(LINUX_DIR
)/.config.old
100 $(call Kernel
/SetInitramfs
/PreConfigure
)
101 echo
'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR
)/.config
102 echo
'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR
)/.config
103 echo
"$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR
)/.config
104 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
105 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
106 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
107 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
108 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
109 echo
-e
"$(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
114 define Kernel
/SetNoInitramfs
115 mv
$(LINUX_DIR
)/.config.set
$(LINUX_DIR
)/.config.old
116 grep
-v INITRAMFS
$(LINUX_DIR
)/.config.old
> $(LINUX_DIR
)/.config.set
117 echo
'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR
)/.config.set
120 define Kernel
/Configure
/Default
121 rm -f
$(LINUX_DIR
)/localversion
122 $(LINUX_CONF_CMD
) > $(LINUX_DIR
)/.config.target
123 # copy CONFIG_KERNEL_* settings over to .config.target
124 awk
'/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR
)/.config
>> $(LINUX_DIR
)/.config.target
125 echo
"# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR
)/.config.target
126 echo
"# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR
)/.config.target
127 echo
"CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $(LINUX_DIR
)/.config.target
128 $(SCRIPT_DIR
)/package-metadata.pl kconfig
$(TMP_DIR
)/.packageinfo
$(TOPDIR
)/.config
$(KERNEL_PATCHVER
) > $(LINUX_DIR
)/.config.
override
129 $(SCRIPT_DIR
)/kconfig.pl
'm+' '+' $(LINUX_DIR
)/.config.target
/dev
/null
$(LINUX_DIR
)/.config.
override > $(LINUX_DIR
)/.config.set
130 $(call Kernel
/SetNoInitramfs
)
131 rm -rf
$(KERNEL_BUILD_DIR
)/modules
132 cmp
-s
$(LINUX_DIR
)/.config.set
$(LINUX_DIR
)/.config.prev ||
{ \
133 cp
$(LINUX_DIR
)/.config.set
$(LINUX_DIR
)/.config
; \
134 cp
$(LINUX_DIR
)/.config.set
$(LINUX_DIR
)/.config.prev
; \
136 $(_SINGLE
) [ -d
$(LINUX_DIR
)/user_headers
] ||
$(MAKE
) $(KERNEL_MAKEOPTS
) INSTALL_HDR_PATH
=$(LINUX_DIR
)/user_headers headers_install
137 $(SH_FUNC
) grep
'=[ym]' $(LINUX_DIR
)/.config.set | LC_ALL
=C
sort | md5s
> $(LINUX_DIR
)/.vermagic
140 define Kernel
/Configure
/Initramfs
141 $(call Kernel
/SetInitramfs
)
144 define Kernel
/CompileModules
/Default
145 rm -f
$(LINUX_DIR
)/vmlinux
$(LINUX_DIR
)/System.map
146 +$(MAKE
) $(KERNEL_MAKEOPTS
) modules
149 OBJCOPY_STRIP
= -R .reginfo
-R .notes
-R .note
-R .comment
-R .mdebug
-R .note.gnu.build-id
151 # AMD64 shares the location with x86
152 ifeq ($(LINUX_KARCH
),x86_64
)
153 IMAGES_DIR
:=..
/..
/x86
/boot
156 define Kernel
/CopyImage
157 cmp
-s
$(LINUX_DIR
)/vmlinux
$(KERNEL_BUILD_DIR
)/vmlinux
$(1).debug ||
{ \
158 $(KERNEL_CROSS
)objcopy
-O binary
$(OBJCOPY_STRIP
) -S
$(LINUX_DIR
)/vmlinux
$(LINUX_KERNEL
)$(1); \
159 $(KERNEL_CROSS
)objcopy
$(OBJCOPY_STRIP
) -S
$(LINUX_DIR
)/vmlinux
$(KERNEL_BUILD_DIR
)/vmlinux
$(1).elf
; \
160 $(CP
) $(LINUX_DIR
)/vmlinux
$(KERNEL_BUILD_DIR
)/vmlinux
$(1).debug
; \
162 $(if
$(KERNEL_IMAGES
),$(KERNEL_IMAGES
),$(filter-out dtbs
,$(KERNELNAME
))), \
163 $(CP
) $(LINUX_DIR
)/arch
/$(LINUX_KARCH
)/boot
/$(IMAGES_DIR
)/$(k
) $(KERNEL_BUILD_DIR
)/$(k
)$(1); \
168 define Kernel
/CompileImage
/Default
169 rm -f
$(TARGET_DIR
)/init
170 +$(MAKE
) $(KERNEL_MAKEOPTS
) $(if
$(KERNELNAME
),$(KERNELNAME
),all) modules
171 $(call Kernel
/CopyImage
)
174 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS
),)
175 define Kernel
/CompileImage
/Initramfs
176 $(call Kernel
/Configure
/Initramfs
)
177 $(CP
) $(GENERIC_PLATFORM_DIR
)/base-files
/init
$(TARGET_DIR
)/init
178 rm -rf
$(KERNEL_BUILD_DIR
)/linux-
$(LINUX_VERSION
)/usr
/initramfs_data.cpio
*
179 +$(MAKE
) $(KERNEL_MAKEOPTS
) $(if
$(KERNELNAME
),$(KERNELNAME
),all) modules
180 $(call Kernel
/CopyImage
,-initramfs
)
183 define Kernel
/CompileImage
/Initramfs
187 define Kernel
/Clean
/Default
188 rm -f
$(KERNEL_BUILD_DIR
)/linux-
$(LINUX_VERSION
)/.configured
189 rm -f
$(LINUX_KERNEL
)
190 $(_SINGLE
)$(MAKE
) -C
$(KERNEL_BUILD_DIR
)/linux-
$(LINUX_VERSION
) clean