linux-yocto/scripts/package/mkdebian

#!/bin/sh

Copyright 2003 Wichert Akkerman wichert@wiggy.net

Simple script to generate a debian/ directory for a Linux kernel.

set -eu

is_enabled() { grep -q "^$1=y" include/config/auto.conf }

if_enabled_echo() { if is_enabled "$1"; then echo -n "$2" elif [ $# -ge 3 ]; then echo -n "$3" fi }

set_debarch() { if [ "${KBUILD_DEBARCH:+set}" ]; then debarch="$KBUILD_DEBARCH" return fi

# Attempt to find the correct Debian architecture
case "$UTS_MACHINE" in
i386|alpha|m68k|riscv*)
	debarch="$UTS_MACHINE" ;;
x86_64)
	debarch=amd64 ;;
sparc*)
	debarch=sparc$(if_enabled_echo CONFIG_64BIT 64) ;;
s390*)
	debarch=s390x ;;
ppc*)
	if is_enabled CONFIG_64BIT; then
		debarch=ppc64$(if_enabled_echo CONFIG_CPU_LITTLE_ENDIAN el)
	else
		debarch=powerpc$(if_enabled_echo CONFIG_SPE spe)
	fi
	;;
parisc*)
	debarch=hppa ;;
mips*)
	if is_enabled CONFIG_CPU_LITTLE_ENDIAN; then
		debarch=mips$(if_enabled_echo CONFIG_64BIT 64)$(if_enabled_echo CONFIG_CPU_MIPSR6 r6)el
	elif is_enabled CONFIG_CPU_MIPSR6; then
		debarch=mips$(if_enabled_echo CONFIG_64BIT 64)r6
	else
		debarch=mips
	fi
	;;
aarch64|arm64)
	debarch=arm64 ;;
arm*)
	if is_enabled CONFIG_AEABI; then
		debarch=arm$(if_enabled_echo CONFIG_VFP hf el)
	else
		debarch=arm
	fi
	;;
openrisc)
	debarch=or1k ;;
sh)
	if is_enabled CONFIG_CPU_SH3; then
		debarch=sh3$(if_enabled_echo CONFIG_CPU_BIG_ENDIAN eb)
	elif is_enabled CONFIG_CPU_SH4; then
		debarch=sh4$(if_enabled_echo CONFIG_CPU_BIG_ENDIAN eb)
	fi
	;;
um)
	if is_enabled CONFIG_64BIT; then
		debarch=amd64
	else
		debarch=i386
	fi
	;;
loongarch64)
	debarch=loong64 ;;
esac
if [ -z "$debarch" ]; then
	debarch=$(dpkg-architecture -qDEB_HOST_ARCH)
	echo "" >&2
	echo "** ** **  WARNING  ** ** **" >&2
	echo "" >&2
	echo "Your architecture doesn't have its equivalent" >&2
	echo "Debian userspace architecture defined!" >&2
	echo "Falling back to the current host architecture ($debarch)." >&2
	echo "Please add support for $UTS_MACHINE to ${0} ..." >&2
	echo "" >&2
fi

}

Create debian/source/ if it is a source package build

gen_source () { mkdir -p debian/source

echo "3.0 (quilt)" > debian/source/format

{
	echo "diff-ignore"
	echo "extend-diff-ignore = .*"
} > debian/source/local-options

# Add .config as a patch
mkdir -p debian/patches
{
	echo "Subject: Add .config"
	echo "Author: ${maintainer}"
	echo
	echo "--- /dev/null"
	echo "+++ linux/.config"
	diff -u /dev/null "${KCONFIG_CONFIG}" | tail -n +3
} > debian/patches/config.patch
echo config.patch > debian/patches/series

"${srctree}/scripts/package/gen-diff-patch" debian/patches/diff.patch
if [ -s debian/patches/diff.patch ]; then
	sed -i "
		1iSubject: Add local diff
		1iAuthor: ${maintainer}
		1i
	" debian/patches/diff.patch

	echo diff.patch >> debian/patches/series
else
	rm -f debian/patches/diff.patch
fi

}

rm -rf debian mkdir debian

user=${KBUILD_BUILD_USER:-$(id -nu)} name=${DEBFULLNAME:-${user}} if [ "${DEBEMAIL:+set}" ]; then email=${DEBEMAIL} else buildhost=${KBUILD_BUILD_HOST:-$(hostname -f 2>/dev/null || hostname)} email="${user}@${buildhost}" fi maintainer="${name} <${email}>"

while [ $# -gt 0 ]; do case "$1" in --need-source) gen_source shift ;; *) break ;; esac done

Some variables and settings used throughout the script

if [ "${KDEB_PKGVERSION:+set}" ]; then packageversion=$KDEB_PKGVERSION else upstream_version=$("${srctree}/scripts/setlocalversion" --no-local "${srctree}" | sed 's/-(rc[1-9])/~\1/') debian_revision=$("${srctree}/scripts/build-version") packageversion=${upstream_version}-${debian_revision} fi sourcename=${KDEB_SOURCENAME:-linux-upstream}

if [ "$ARCH" = "um" ] ; then packagename=user-mode-linux else packagename=linux-image fi

debarch= set_debarch

Try to determine distribution

if [ "${KDEB_CHANGELOG_DIST:+set}" ]; then distribution=$KDEB_CHANGELOG_DIST

In some cases lsb_release returns the codename as n/a, which breaks dpkg-parsechangelog

elif distribution=$(lsb_release -cs 2>/dev/null) && [ -n "$distribution" ] && [ "$distribution" != "n/a" ]; then : # nothing to do in this case else distribution="unstable" echo >&2 "Using default distribution of 'unstable' in the changelog" echo >&2 "Install lsb-release or set $KDEB_CHANGELOG_DIST explicitly" fi

echo $debarch > debian/arch

host_gnu=$(dpkg-architecture -a "${debarch}" -q DEB_HOST_GNU_TYPE | sed 's/_/-/g')

Generate a simple changelog template

cat < debian/changelog $sourcename ($packageversion) $distribution; urgency=low

• Custom built Linux kernel.

-- $maintainer $(date -R) EOF

Generate a control file

cat < debian/control Source: $sourcename Section: kernel Priority: optional Maintainer: $maintainer Rules-Requires-Root: no Build-Depends: debhelper-compat (= 12) Build-Depends-Arch: bc, bison, flex, gcc-${host_gnu} <!pkg.${sourcename}.nokernelheaders>, kmod, libdw-dev:native, libelf-dev:native, libssl-dev:native, libssl-dev <!pkg.${sourcename}.nokernelheaders>, python3:native, rsync Homepage: https://www.kernel.org/

Package: $packagename-${KERNELRELEASE} Architecture: $debarch Description: Linux kernel, version ${KERNELRELEASE} This package contains the Linux kernel, modules and corresponding other files, version: ${KERNELRELEASE}. EOF

if [ "${SRCARCH}" != um ]; then cat <> debian/control

Package: linux-libc-dev Section: devel Provides: linux-kernel-headers Architecture: $debarch Description: Linux support headers for userspace development This package provides userspaces headers from the Linux kernel. These headers are used by the installed headers for GNU glibc and other system libraries. Multi-Arch: same EOF

if is_enabled CONFIG_MODULES; then cat <> debian/control

Package: linux-headers-${KERNELRELEASE} Architecture: $debarch Build-Profiles: <!pkg.${sourcename}.nokernelheaders> Description: Linux kernel headers for ${KERNELRELEASE} on $debarch This package provides kernel header files for ${KERNELRELEASE} on $debarch . This is useful for people who need to build external modules EOF fi fi

if is_enabled CONFIG_DEBUG_INFO; then cat <> debian/control

Package: linux-image-${KERNELRELEASE}-dbg Section: debug Architecture: $debarch Build-Profiles: <!pkg.${sourcename}.nokerneldbg> Description: Linux kernel debugging symbols for ${KERNELRELEASE} This package will come in handy if you need to debug the kernel. It provides all the necessary debug symbols for the kernel and its modules. EOF fi

cat < debian/rules.vars ARCH := ${ARCH} KERNELRELEASE := ${KERNELRELEASE} EOF

cp "${srctree}/scripts/package/debian/copyright" debian/ cp "${srctree}/scripts/package/debian/rules" debian/

exit 0