xref: /linux/scripts/package/mkdebian (revision a016546ba60cbf3243f10670ae24fbd0bb343c08)
1#!/bin/sh
2#
3# Copyright 2003 Wichert Akkerman <wichert@wiggy.net>
4#
5# Simple script to generate a debian/ directory for a Linux kernel.
6
7set -eu
8
9is_enabled() {
10	grep -q "^$1=y" include/config/auto.conf
11}
12
13if_enabled_echo() {
14	if is_enabled "$1"; then
15		echo -n "$2"
16	elif [ $# -ge 3 ]; then
17		echo -n "$3"
18	fi
19}
20
21set_debarch() {
22	if [ "${KBUILD_DEBARCH:+set}" ]; then
23		debarch="$KBUILD_DEBARCH"
24		return
25	fi
26
27	# Attempt to find the correct Debian architecture
28	case "$UTS_MACHINE" in
29	i386|alpha|m68k|riscv*)
30		debarch="$UTS_MACHINE" ;;
31	x86_64)
32		debarch=amd64 ;;
33	sparc*)
34		debarch=sparc$(if_enabled_echo CONFIG_64BIT 64) ;;
35	s390*)
36		debarch=s390x ;;
37	ppc*)
38		if is_enabled CONFIG_64BIT; then
39			debarch=ppc64$(if_enabled_echo CONFIG_CPU_LITTLE_ENDIAN el)
40		else
41			debarch=powerpc$(if_enabled_echo CONFIG_SPE spe)
42		fi
43		;;
44	parisc*)
45		debarch=hppa ;;
46	mips*)
47		if is_enabled CONFIG_CPU_LITTLE_ENDIAN; then
48			debarch=mips$(if_enabled_echo CONFIG_64BIT 64)$(if_enabled_echo CONFIG_CPU_MIPSR6 r6)el
49		elif is_enabled CONFIG_CPU_MIPSR6; then
50			debarch=mips$(if_enabled_echo CONFIG_64BIT 64)r6
51		else
52			debarch=mips
53		fi
54		;;
55	aarch64|arm64)
56		debarch=arm64 ;;
57	arm*)
58		if is_enabled CONFIG_AEABI; then
59			debarch=arm$(if_enabled_echo CONFIG_VFP hf el)
60		else
61			debarch=arm
62		fi
63		;;
64	openrisc)
65		debarch=or1k ;;
66	sh)
67		if is_enabled CONFIG_CPU_SH3; then
68			debarch=sh3$(if_enabled_echo CONFIG_CPU_BIG_ENDIAN eb)
69		elif is_enabled CONFIG_CPU_SH4; then
70			debarch=sh4$(if_enabled_echo CONFIG_CPU_BIG_ENDIAN eb)
71		fi
72		;;
73	um)
74		if is_enabled CONFIG_64BIT; then
75			debarch=amd64
76		else
77			debarch=i386
78		fi
79		;;
80	esac
81	if [ -z "$debarch" ]; then
82		debarch=$(dpkg-architecture -qDEB_HOST_ARCH)
83		echo "" >&2
84		echo "** ** **  WARNING  ** ** **" >&2
85		echo "" >&2
86		echo "Your architecture doesn't have its equivalent" >&2
87		echo "Debian userspace architecture defined!" >&2
88		echo "Falling back to the current host architecture ($debarch)." >&2
89		echo "Please add support for $UTS_MACHINE to ${0} ..." >&2
90		echo "" >&2
91	fi
92}
93
94# Create debian/source/ if it is a source package build
95gen_source ()
96{
97	mkdir -p debian/source
98
99	echo "3.0 (quilt)" > debian/source/format
100
101	{
102		echo "diff-ignore"
103		echo "extend-diff-ignore = .*"
104	} > debian/source/local-options
105
106	# Add .config as a patch
107	mkdir -p debian/patches
108	{
109		echo "Subject: Add .config"
110		echo "Author: ${maintainer}"
111		echo
112		echo "--- /dev/null"
113		echo "+++ linux/.config"
114		diff -u /dev/null "${KCONFIG_CONFIG}" | tail -n +3
115	} > debian/patches/config.patch
116	echo config.patch > debian/patches/series
117
118	"${srctree}/scripts/package/gen-diff-patch" debian/patches/diff.patch
119	if [ -s debian/patches/diff.patch ]; then
120		sed -i "
121			1iSubject: Add local diff
122			1iAuthor: ${maintainer}
123			1i
124		" debian/patches/diff.patch
125
126		echo diff.patch >> debian/patches/series
127	else
128		rm -f debian/patches/diff.patch
129	fi
130}
131
132rm -rf debian
133mkdir debian
134
135user=${KBUILD_BUILD_USER:-$(id -nu)}
136name=${DEBFULLNAME:-${user}}
137if [ "${DEBEMAIL:+set}" ]; then
138	email=${DEBEMAIL}
139else
140	buildhost=${KBUILD_BUILD_HOST:-$(hostname -f 2>/dev/null || hostname)}
141	email="${user}@${buildhost}"
142fi
143maintainer="${name} <${email}>"
144
145while [ $# -gt 0 ]; do
146	case "$1" in
147	--need-source)
148		gen_source
149		shift
150		;;
151	*)
152		break
153		;;
154	esac
155done
156
157# Some variables and settings used throughout the script
158version=$KERNELRELEASE
159if [ "${KDEB_PKGVERSION:+set}" ]; then
160	packageversion=$KDEB_PKGVERSION
161else
162	packageversion=$(${srctree}/scripts/setlocalversion --no-local ${srctree})-$($srctree/scripts/build-version)
163fi
164sourcename=${KDEB_SOURCENAME:-linux-upstream}
165
166if [ "$ARCH" = "um" ] ; then
167	packagename=user-mode-linux
168else
169	packagename=linux-image
170fi
171
172debarch=
173set_debarch
174
175# Try to determine distribution
176if [ "${KDEB_CHANGELOG_DIST:+set}" ]; then
177        distribution=$KDEB_CHANGELOG_DIST
178# In some cases lsb_release returns the codename as n/a, which breaks dpkg-parsechangelog
179elif distribution=$(lsb_release -cs 2>/dev/null) && [ -n "$distribution" ] && [ "$distribution" != "n/a" ]; then
180        : # nothing to do in this case
181else
182        distribution="unstable"
183        echo >&2 "Using default distribution of 'unstable' in the changelog"
184        echo >&2 "Install lsb-release or set \$KDEB_CHANGELOG_DIST explicitly"
185fi
186
187echo $debarch > debian/arch
188
189host_gnu=$(dpkg-architecture -a "${debarch}" -q DEB_HOST_GNU_TYPE | sed 's/_/-/g')
190
191# Generate a simple changelog template
192cat <<EOF > debian/changelog
193$sourcename ($packageversion) $distribution; urgency=low
194
195  * Custom built Linux kernel.
196
197 -- $maintainer  $(date -R)
198EOF
199
200# Generate a control file
201cat <<EOF > debian/control
202Source: $sourcename
203Section: kernel
204Priority: optional
205Maintainer: $maintainer
206Rules-Requires-Root: no
207Build-Depends: debhelper-compat (= 12)
208Build-Depends-Arch: bc, bison, cpio, flex,
209 gcc-${host_gnu} <!pkg.${sourcename}.nokernelheaders>,
210 kmod, libelf-dev:native,
211 libssl-dev:native, libssl-dev <!pkg.${sourcename}.nokernelheaders>,
212 python3:native, rsync
213Homepage: https://www.kernel.org/
214
215Package: $packagename-$version
216Architecture: $debarch
217Description: Linux kernel, version $version
218 This package contains the Linux kernel, modules and corresponding other
219 files, version: $version.
220EOF
221
222if [ "${SRCARCH}" != um ]; then
223cat <<EOF >> debian/control
224
225Package: linux-libc-dev
226Section: devel
227Provides: linux-kernel-headers
228Architecture: $debarch
229Description: Linux support headers for userspace development
230 This package provides userspaces headers from the Linux kernel.  These headers
231 are used by the installed headers for GNU glibc and other system libraries.
232Multi-Arch: same
233EOF
234
235if is_enabled CONFIG_MODULES; then
236cat <<EOF >> debian/control
237
238Package: linux-headers-$version
239Architecture: $debarch
240Build-Profiles: <!pkg.${sourcename}.nokernelheaders>
241Description: Linux kernel headers for $version on $debarch
242 This package provides kernel header files for $version on $debarch
243 .
244 This is useful for people who need to build external modules
245EOF
246fi
247fi
248
249if is_enabled CONFIG_DEBUG_INFO; then
250cat <<EOF >> debian/control
251
252Package: linux-image-$version-dbg
253Section: debug
254Architecture: $debarch
255Build-Profiles: <!pkg.${sourcename}.nokerneldbg>
256Description: Linux kernel debugging symbols for $version
257 This package will come in handy if you need to debug the kernel. It provides
258 all the necessary debug symbols for the kernel and its modules.
259EOF
260fi
261
262cat <<EOF > debian/rules.vars
263ARCH := ${ARCH}
264KERNELRELEASE := ${KERNELRELEASE}
265EOF
266
267cp "${srctree}/scripts/package/debian/copyright" debian/
268cp "${srctree}/scripts/package/debian/rules" debian/
269
270exit 0
271