1 # SPDX-License-Identifier: GPL-2.0-only
3 # Copyright (C) 2006-2020 OpenWrt.org
5 ifdef CONFIG_STRIP_KERNEL_EXPORTS
7 EXTRA_LDSFLAGS
="-I$(KERNEL_BUILD_DIR) -include symtab.h"
10 INITRAMFS_EXTRA_FILES ?
= $(GENERIC_PLATFORM_DIR
)/image
/initramfs-base-files.txt
13 KERNEL_MAKEOPTS
+= CC
="$(KERNEL_CC)"
16 export HOST_EXTRACFLAGS
=-I
$(STAGING_DIR_HOST
)/include
19 Kernel
/Patch
:=$(Kernel
/Patch
/Default
)
21 ifneq (,$(findstring .xz
,$(LINUX_SOURCE
)))
27 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE
)),"")
28 ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI
)),"")
29 define Kernel
/Prepare
/Default
30 $(LINUX_CAT
) $(DL_DIR
)/$(LINUX_SOURCE
) |
$(TAR
) -C
$(KERNEL_BUILD_DIR
) $(TAR_OPTIONS
)
32 $(if
$(QUILT
),touch
$(LINUX_DIR
)/.quilt_used
)
35 define Kernel
/Prepare
/Default
36 $(LINUX_CAT
) $(DL_DIR
)/$(LINUX_SOURCE
) |
$(TAR
) -C
$(KERNEL_BUILD_DIR
) $(TAR_OPTIONS
)
40 define Kernel
/Prepare
/Default
41 mkdir
-p
$(KERNEL_BUILD_DIR
)
42 if
[ -d
$(LINUX_DIR
) ]; then \
45 ln
-s
$(CONFIG_EXTERNAL_KERNEL_TREE
) $(LINUX_DIR
)
46 $(_SINGLE
) [ -d
$(LINUX_DIR
)/user_headers
] && rm -rf
$(LINUX_DIR
)/user_headers
50 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS
),y
)
51 ifeq ($(strip $(CONFIG_EXTERNAL_CPIO
)),"")
52 define Kernel
/SetInitramfs
/PreConfigure
53 grep
-v
-e INITRAMFS
-e CONFIG_RD_
-e CONFIG_BLK_DEV_INITRD
$(LINUX_DIR
)/.config.old
> $(LINUX_DIR
)/.config
54 echo
'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR
)/.config
55 echo
'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR
)/.config
58 define Kernel
/SetInitramfs
/PreConfigure
59 grep
-v INITRAMFS
$(LINUX_DIR
)/.config.old
> $(LINUX_DIR
)/.config
60 echo
'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $(LINUX_DIR
)/.config
64 define Kernel
/SetInitramfs
65 rm -f
$(LINUX_DIR
)/.config.prev
66 mv
$(LINUX_DIR
)/.config
$(LINUX_DIR
)/.config.old
67 $(call Kernel
/SetInitramfs
/PreConfigure
)
68 echo
'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR
)/.config
69 echo
'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR
)/.config
70 echo
"$(if $(CONFIG_TARGET_INITRAMFS_FORCE),CONFIG_INITRAMFS_FORCE=y,# CONFIG_INITRAMFS_FORCE is not set)" >> $(LINUX_DIR
)/.config
71 echo
"$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE),CONFIG_INITRAMFS_COMPRESSION_NONE=y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set)" >> $(LINUX_DIR
)/.config
72 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
73 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
74 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
75 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
76 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
77 echo
-e
"$(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)" >> $(LINUX_DIR
)/.config
78 echo
-e
"$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD),CONFIG_INITRAMFS_COMPRESSION_ZSTD=y\nCONFIG_RD_STD=y,# CONFIG_INITRAMFS_COMPRESSION_ZSTD is not set\n# CONFIG_RD_ZSTD is not set)" >> $(LINUX_DIR
)/.config
83 define Kernel
/SetNoInitramfs
84 mv
$(LINUX_DIR
)/.config.set
$(LINUX_DIR
)/.config.old
85 grep
-v INITRAMFS
$(LINUX_DIR
)/.config.old
> $(LINUX_DIR
)/.config.set
86 echo
'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR
)/.config.set
87 echo
'# CONFIG_INITRAMFS_FORCE is not set' >> $(LINUX_DIR
)/.config.set
90 define Kernel
/Configure
/Default
91 rm -f
$(LINUX_DIR
)/localversion
92 $(LINUX_CONF_CMD
) > $(LINUX_DIR
)/.config.target
93 # copy CONFIG_KERNEL_* settings over to .config.target
94 awk
'/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR
)/.config
>> $(LINUX_DIR
)/.config.target
95 echo
"# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR
)/.config.target
96 echo
"# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR
)/.config.target
97 echo
"CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $(LINUX_DIR
)/.config.target
98 $(SCRIPT_DIR
)/package-metadata.pl kconfig
$(TMP_DIR
)/.packageinfo
$(TOPDIR
)/.config
$(KERNEL_PATCHVER
) > $(LINUX_DIR
)/.config.
override
99 $(SCRIPT_DIR
)/kconfig.pl
'm+' '+' $(LINUX_DIR
)/.config.target
/dev
/null
$(LINUX_DIR
)/.config.
override > $(LINUX_DIR
)/.config.set
100 $(call Kernel
/SetNoInitramfs
)
101 rm -rf
$(KERNEL_BUILD_DIR
)/modules
102 cmp
-s
$(LINUX_DIR
)/.config.set
$(LINUX_DIR
)/.config.prev ||
{ \
103 cp
$(LINUX_DIR
)/.config.set
$(LINUX_DIR
)/.config
; \
104 cp
$(LINUX_DIR
)/.config.set
$(LINUX_DIR
)/.config.prev
; \
106 $(_SINGLE
) [ -d
$(LINUX_DIR
)/user_headers
] ||
$(KERNEL_MAKE
) INSTALL_HDR_PATH
=$(LINUX_DIR
)/user_headers headers_install
107 grep
'=[ym]' $(LINUX_DIR
)/.config.set | LC_ALL
=C
sort | mkhash md5
> $(LINUX_DIR
)/.vermagic
110 define Kernel
/Configure
/Initramfs
111 $(call Kernel
/SetInitramfs
)
114 define Kernel
/CompileModules
/Default
115 rm -f
$(LINUX_DIR
)/vmlinux
$(LINUX_DIR
)/System.map
116 +$(KERNEL_MAKE
) $(if
$(KERNELNAME
),$(KERNELNAME
),all) modules
119 OBJCOPY_STRIP
= -R .reginfo
-R .notes
-R .note
-R .comment
-R .mdebug
-R .note.gnu.build-id
121 # AMD64 shares the location with x86
122 ifeq ($(LINUX_KARCH
),x86_64
)
123 IMAGES_DIR
:=..
/..
/x86
/boot
126 define Kernel
/CopyImage
127 cmp
-s
$(LINUX_DIR
)/vmlinux
$(KERNEL_BUILD_DIR
)/vmlinux
$(1).debug ||
{ \
128 $(KERNEL_CROSS
)objcopy
-O binary
$(OBJCOPY_STRIP
) -S
$(LINUX_DIR
)/vmlinux
$(LINUX_KERNEL
)$(1); \
129 $(KERNEL_CROSS
)objcopy
$(OBJCOPY_STRIP
) -S
$(LINUX_DIR
)/vmlinux
$(KERNEL_BUILD_DIR
)/vmlinux
$(1).elf
; \
130 $(CP
) $(LINUX_DIR
)/vmlinux
$(KERNEL_BUILD_DIR
)/vmlinux
$(1).debug
; \
132 $(if
$(KERNEL_IMAGES
),$(KERNEL_IMAGES
),$(filter-out vmlinux dtbs
,$(KERNELNAME
))), \
133 $(CP
) $(LINUX_DIR
)/arch
/$(LINUX_KARCH
)/boot
/$(IMAGES_DIR
)/$(k
) $(KERNEL_BUILD_DIR
)/$(k
)$(1); \
138 define Kernel
/CompileImage
/Default
139 rm -f
$(TARGET_DIR
)/init
140 +$(KERNEL_MAKE
) $(if
$(KERNELNAME
),$(KERNELNAME
),all)
141 $(call Kernel
/CopyImage
)
144 ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS
),)
145 define Kernel
/CompileImage
/Initramfs
146 $(call Kernel
/Configure
/Initramfs
)
147 $(CP
) $(GENERIC_PLATFORM_DIR
)/other-files
/init
$(TARGET_DIR
)/init
148 $(if
$(SOURCE_DATE_EPOCH
),touch
-hcd
"@$(SOURCE_DATE_EPOCH)" $(TARGET_DIR
)/init
)
149 rm -rf
$(KERNEL_BUILD_DIR
)/linux-
$(LINUX_VERSION
)/usr
/initramfs_data.cpio
*
150 +$(KERNEL_MAKE
) $(if
$(KERNELNAME
),$(KERNELNAME
),all)
151 $(call Kernel
/CopyImage
,-initramfs
)
154 define Kernel
/CompileImage
/Initramfs
158 define Kernel
/Clean
/Default
159 rm -f
$(KERNEL_BUILD_DIR
)/linux-
$(LINUX_VERSION
)/.configured
160 rm -f
$(LINUX_KERNEL
)
161 $(_SINGLE
)$(MAKE
) -C
$(KERNEL_BUILD_DIR
)/linux-
$(LINUX_VERSION
) clean