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# SPDX-License-Identifier: GPL-2.0-only
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#
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# Copyright (C) 2006-2020 OpenWrt.org
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i f d e f C O N F I G _ S T R I P _ K E R N E L _ E X P O R T S
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KERNEL_MAKEOPTS_IMAGE += \
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EXTRA_LDSFLAGS = " -I $( KERNEL_BUILD_DIR) -include symtab.h "
e n d i f
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INITRAMFS_EXTRA_FILES ?= $( GENERIC_PLATFORM_DIR) /image/initramfs-base-files.txt
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i f n e q ( , $( KERNEL_CC ) )
KERNEL_MAKEOPTS += CC = " $( KERNEL_CC) "
e n d i f
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export HOST_EXTRACFLAGS = -I$( STAGING_DIR_HOST) /include
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# defined in quilt.mk
Kernel/Patch : =$( Kernel /Patch /Default )
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i f n e q ( , $( findstring .xz ,$ ( LINUX_SOURCE ) ) )
LINUX_CAT:= xzcat
e l s e
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LINUX_CAT:= gzip -dc
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e n d i f
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i f e q ( $( strip $ ( CONFIG_EXTERNAL_KERNEL_TREE ) ) , "" )
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ifeq ( $( strip $( CONFIG_KERNEL_GIT_CLONE_URI) ) ,"" )
define Kernel/Prepare/Default
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$( LINUX_CAT) $( DL_DIR) /$( LINUX_SOURCE) | $( TAR) -C $( KERNEL_BUILD_DIR) $( TAR_OPTIONS)
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$( Kernel/Patch)
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$( if $( QUILT) ,touch $( LINUX_DIR) /.quilt_used)
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endef
else
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define Kernel/Prepare/Default
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$( LINUX_CAT) $( DL_DIR) /$( LINUX_SOURCE) | $( TAR) -C $( KERNEL_BUILD_DIR) $( TAR_OPTIONS)
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endef
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endif
e l s e
define Kernel/Prepare/Default
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mkdir -p $( KERNEL_BUILD_DIR)
if [ -d $( LINUX_DIR) ] ; then \
rmdir $( LINUX_DIR) ; \
fi
ln -s $( CONFIG_EXTERNAL_KERNEL_TREE) $( LINUX_DIR)
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if [ -d $( LINUX_DIR) /user_headers ] ; then \
rm -rf $( LINUX_DIR) /user_headers; \
fi
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endef
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e n d i f
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i f e q ( $( CONFIG_TARGET_ROOTFS_INITRAMFS ) , y )
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ifeq ( $( CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE) ,y)
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define Kernel/SetInitramfs/PreConfigure
grep -v -e CONFIG_BLK_DEV_INITRD $( LINUX_DIR) /.config.old > $( LINUX_DIR) /.config
echo 'CONFIG_BLK_DEV_INITRD=y' >> $( LINUX_DIR) /.config
echo 'CONFIG_INITRAMFS_SOURCE=""' >> $( LINUX_DIR) /.config
endef
else
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ifeq ( $( strip $( CONFIG_EXTERNAL_CPIO) ) ,"" )
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define Kernel/SetInitramfs/PreConfigure
grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $( LINUX_DIR) /.config.old > $( LINUX_DIR) /.config
echo 'CONFIG_BLK_DEV_INITRD=y' >> $( LINUX_DIR) /.config
echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $( LINUX_DIR) /.config
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endef
else
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define Kernel/SetInitramfs/PreConfigure
grep -v INITRAMFS $( LINUX_DIR) /.config.old > $( LINUX_DIR) /.config
echo 'CONFIG_INITRAMFS_SOURCE="$(call qstrip,$(CONFIG_EXTERNAL_CPIO))"' >> $( LINUX_DIR) /.config
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endef
endif
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e n d i f
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define Kernel/SetInitramfs
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rm -f $( LINUX_DIR) /.config.prev
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mv $( LINUX_DIR) /.config $( LINUX_DIR) /.config.old
$( call Kernel/SetInitramfs/PreConfigure)
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ifneq ( $( CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE) ,y)
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echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $( LINUX_DIR) /.config
echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $( LINUX_DIR) /.config
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echo " $( if $( CONFIG_TARGET_INITRAMFS_FORCE) ,CONFIG_INITRAMFS_FORCE= y,# CONFIG_INITRAMFS_FORCE is not set ) " >> $( LINUX_DIR) /.config
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else
echo "# CONFIG_INITRAMFS_FORCE is not set" >> $( LINUX_DIR) /.config
endif
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echo " $( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE) ,CONFIG_INITRAMFS_COMPRESSION_NONE= y,# CONFIG_INITRAMFS_COMPRESSION_NONE is not set ) " >> $( LINUX_DIR) /.config
echo -e " $( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_GZIP) ,CONFIG_INITRAMFS_COMPRESSION_GZIP= y\n CONFIG_RD_GZIP= y,# CONFIG_INITRAMFS_COMPRESSION_GZIP is not set\n # CONFIG_RD_GZIP is not set)" >> $(LINUX_DIR)/.config
echo -e " $( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_BZIP2) ,CONFIG_INITRAMFS_COMPRESSION_BZIP2= y\n CONFIG_RD_BZIP2= y,# CONFIG_INITRAMFS_COMPRESSION_BZIP2 is not set\n # CONFIG_RD_BZIP2 is not set)" >> $(LINUX_DIR)/.config
echo -e " $( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA) ,CONFIG_INITRAMFS_COMPRESSION_LZMA= y\n CONFIG_RD_LZMA= y,# CONFIG_INITRAMFS_COMPRESSION_LZMA is not set\n # CONFIG_RD_LZMA is not set)" >> $(LINUX_DIR)/.config
echo -e " $( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO) ,CONFIG_INITRAMFS_COMPRESSION_LZO= y\n CONFIG_RD_LZO= y,# CONFIG_INITRAMFS_COMPRESSION_LZO is not set\n # CONFIG_RD_LZO is not set)" >> $(LINUX_DIR)/.config
echo -e " $( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ) ,CONFIG_INITRAMFS_COMPRESSION_XZ= y\n CONFIG_RD_XZ= y,# CONFIG_INITRAMFS_COMPRESSION_XZ is not set\n # CONFIG_RD_XZ is not set)" >> $(LINUX_DIR)/.config
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echo -e " $( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_LZ4) ,CONFIG_INITRAMFS_COMPRESSION_LZ4= y\n CONFIG_RD_LZ4= y,# CONFIG_INITRAMFS_COMPRESSION_LZ4 is not set\n # CONFIG_RD_LZ4 is not set)" >> $(LINUX_DIR)/.config
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echo -e " $( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD) ,CONFIG_INITRAMFS_COMPRESSION_ZSTD= y\n CONFIG_RD_ZSTD= y,# CONFIG_INITRAMFS_COMPRESSION_ZSTD is not set\n # CONFIG_RD_ZSTD is not set)" >> $(LINUX_DIR)/.config
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endef
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e l s e
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e n d i f
d e f i n e K e r n e l / S e t N o I n i t r a m f s
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mv $( LINUX_DIR) /.config.set $( LINUX_DIR) /.config.old
grep -v INITRAMFS $( LINUX_DIR) /.config.old > $( LINUX_DIR) /.config.set
echo 'CONFIG_INITRAMFS_SOURCE=""' >> $( LINUX_DIR) /.config.set
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echo '# CONFIG_INITRAMFS_FORCE is not set' >> $( LINUX_DIR) /.config.set
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e n d e f
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d e f i n e K e r n e l / C o n f i g u r e / D e f a u l t
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rm -f $( LINUX_DIR) /localversion
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$( LINUX_CONF_CMD) > $( LINUX_DIR) /.config.target
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# copy CONFIG_KERNEL_* settings over to .config.target
awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $( TOPDIR) /.config >> $( LINUX_DIR) /.config.target
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echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $( LINUX_DIR) /.config.target
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echo "# CONFIG_KALLSYMS_ALL is not set" >> $( LINUX_DIR) /.config.target
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echo "CONFIG_KALLSYMS_UNCOMPRESSED=y" >> $( LINUX_DIR) /.config.target
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$( SCRIPT_DIR) /package-metadata.pl kconfig $( TMP_DIR) /.packageinfo $( TOPDIR) /.config $( KERNEL_PATCHVER) > $( LINUX_DIR) /.config.override
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$( SCRIPT_DIR) /kconfig.pl 'm+' '+' $( LINUX_DIR) /.config.target /dev/null $( LINUX_DIR) /.config.override > $( LINUX_DIR) /.config.set
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$( call Kernel/SetNoInitramfs)
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rm -rf $( KERNEL_BUILD_DIR) /modules
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cmp -s $( LINUX_DIR) /.config.set $( LINUX_DIR) /.config.prev || { \
cp $( LINUX_DIR) /.config.set $( LINUX_DIR) /.config; \
cp $( LINUX_DIR) /.config.set $( LINUX_DIR) /.config.prev; \
}
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$( _SINGLE) [ -d $( LINUX_DIR) /user_headers ] || $( KERNEL_MAKE) INSTALL_HDR_PATH = $( LINUX_DIR) /user_headers headers_install
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grep '=[ym]' $( LINUX_DIR) /.config.set | LC_ALL = C sort | $( MKHASH) md5 > $( LINUX_DIR) /.vermagic
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e n d e f
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d e f i n e K e r n e l / C o n f i g u r e / I n i t r a m f s
$( call Kernel/SetInitramfs)
e n d e f
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d e f i n e K e r n e l / C o m p i l e M o d u l e s / D e f a u l t
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rm -f $( LINUX_DIR) /vmlinux $( LINUX_DIR) /System.map
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+$( KERNEL_MAKE) $( if $( KERNELNAME) ,$( KERNELNAME) ,all) modules
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e n d e f
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OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
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# AMD64 shares the location with x86
i f e q ( $( LINUX_KARCH ) , x 8 6 _ 6 4 )
IMAGES_DIR := ../../x86/boot
e n d i f
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d e f i n e K e r n e l / C o p y I m a g e
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cmp -s $( LINUX_DIR) /vmlinux $( KERNEL_BUILD_DIR) /vmlinux$( 1) .debug || { \
$( KERNEL_CROSS) objcopy -O binary $( OBJCOPY_STRIP) -S $( LINUX_DIR) /vmlinux $( LINUX_KERNEL) $( 1) ; \
$( KERNEL_CROSS) objcopy $( OBJCOPY_STRIP) -S $( LINUX_DIR) /vmlinux $( KERNEL_BUILD_DIR) /vmlinux$( 1) .elf; \
$( CP) $( LINUX_DIR) /vmlinux $( KERNEL_BUILD_DIR) /vmlinux$( 1) .debug; \
$( foreach k, \
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$( if $( KERNEL_IMAGES) ,$( KERNEL_IMAGES) ,$( filter-out vmlinux dtbs,$( KERNELNAME) ) ) , \
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$( CP) $( LINUX_DIR) /arch/$( LINUX_KARCH) /boot/$( IMAGES_DIR) /$( k) $( KERNEL_BUILD_DIR) /$( k) $( 1) ; \
) \
}
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e n d e f
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# Always add "modules" so a proper Module.symvers file is written that
# also contains symbols from the kernel modules. Without these symbols
# external packages that depend on exported symbols from kernel modules
# will fail to build.
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d e f i n e K e r n e l / C o m p i l e I m a g e / D e f a u l t
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rm -f $( TARGET_DIR) /init
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+$( KERNEL_MAKE) $( KERNEL_MAKEOPTS_IMAGE) $( if $( KERNELNAME) ,$( KERNELNAME) ,all) modules
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$( call Kernel/CopyImage)
e n d e f
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# Here as well, always add "modules", see comment above.
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i f n e q ( $( CONFIG_TARGET_ROOTFS_INITRAMFS ) , )
d e f i n e K e r n e l / C o m p i l e I m a g e / I n i t r a m f s
$( call Kernel/Configure/Initramfs)
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$( CP) $( GENERIC_PLATFORM_DIR) /other-files/init $( TARGET_DIR) /init
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$( if $( SOURCE_DATE_EPOCH) ,touch -hcd " @ $( SOURCE_DATE_EPOCH) " $( TARGET_DIR) /init)
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rm -rf $( KERNEL_BUILD_DIR) /linux-$( LINUX_VERSION) /usr/initramfs_data.cpio*
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i f e q ( $( CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE ) , y )
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i f e q ( $( CONFIG_EXTERNAL_CPIO ) , y )
$( CP) $( CONFIG_EXTERNAL_CPIO) $( KERNEL_BUILD_DIR) /initrd.cpio
e l s e
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( cd $( TARGET_DIR) ; find . | $( STAGING_DIR_HOST) /bin/cpio -o -H newc -R 0:0 > $( KERNEL_BUILD_DIR) /initrd.cpio )
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e n d i f
$( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_BZIP2) ,bzip2 -9 -c < $( KERNEL_BUILD_DIR) /initrd.cpio > $( KERNEL_BUILD_DIR) /initrd.cpio.bzip2)
$( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_GZIP) ,gzip -f -S .gzip -9n $( KERNEL_BUILD_DIR) /initrd.cpio)
$( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA) ,$( STAGING_DIR_HOST) /bin/lzma e -lc1 -lp2 -pb2 $( KERNEL_BUILD_DIR) /initrd.cpio $( KERNEL_BUILD_DIR) /initrd.cpio.lzma)
# ? $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO),)
$( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ) ,$( STAGING_DIR_HOST) /bin/xz -9 -fz --check= crc32 $( KERNEL_BUILD_DIR) /initrd.cpio)
# ? $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZ4),)
$( if $( CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD) ,$( STAGING_DIR_HOST) /bin/zstd -T0 -f -o $( KERNEL_BUILD_DIR) /initrd.cpio.zstd $( KERNEL_BUILD_DIR) /initrd.cpio)
e n d i f
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+$( KERNEL_MAKE) $( KERNEL_MAKEOPTS_IMAGE) $( if $( KERNELNAME) ,$( KERNELNAME) ,all) modules
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$( call Kernel/CopyImage,-initramfs)
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e n d e f
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e l s e
d e f i n e K e r n e l / C o m p i l e I m a g e / I n i t r a m f s
e n d e f
e n d i f
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d e f i n e K e r n e l / C l e a n / D e f a u l t
rm -f $( KERNEL_BUILD_DIR) /linux-$( LINUX_VERSION) /.configured
rm -f $( LINUX_KERNEL)
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$( _SINGLE) $( MAKE) -C $( KERNEL_BUILD_DIR) /linux-$( LINUX_VERSION) clean
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e n d e f