xref: /openbmc/linux/scripts/package/mkdebian (revision 4f89e4b8) 
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 -e
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 "$3"
18	fi
19}
20
21set_debarch() {
22	if [ -n "$KBUILD_DEBARCH" ] ; 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|ia64|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	esac
74	if [ -z "$debarch" ]; then
75		debarch=$(dpkg-architecture -qDEB_HOST_ARCH)
76		echo "" >&2
77		echo "** ** **  WARNING  ** ** **" >&2
78		echo "" >&2
79		echo "Your architecture doesn't have its equivalent" >&2
80		echo "Debian userspace architecture defined!" >&2
81		echo "Falling back to the current host architecture ($debarch)." >&2
82		echo "Please add support for $UTS_MACHINE to ${0} ..." >&2
83		echo "" >&2
84	fi
85}
86
87# Some variables and settings used throughout the script
88version=$KERNELRELEASE
89if [ -n "$KDEB_PKGVERSION" ]; then
90	packageversion=$KDEB_PKGVERSION
91	revision=${packageversion##*-}
92else
93	revision=$(cat .version 2>/dev/null||echo 1)
94	packageversion=$version-$revision
95fi
96sourcename=$KDEB_SOURCENAME
97packagename=linux-image-$version
98kernel_headers_packagename=linux-headers-$version
99dbg_packagename=$packagename-dbg
100debarch=
101set_debarch
102
103if [ "$ARCH" = "um" ] ; then
104	packagename=user-mode-linux-$version
105fi
106
107email=${DEBEMAIL-$EMAIL}
108
109# use email string directly if it contains <email>
110if echo $email | grep -q '<.*>'; then
111	maintainer=$email
112else
113	# or construct the maintainer string
114	user=${KBUILD_BUILD_USER-$(id -nu)}
115	name=${DEBFULLNAME-$user}
116	if [ -z "$email" ]; then
117		buildhost=${KBUILD_BUILD_HOST-$(hostname -f 2>/dev/null || hostname)}
118		email="$user@$buildhost"
119	fi
120	maintainer="$name <$email>"
121fi
122
123# Try to determine distribution
124if [ -n "$KDEB_CHANGELOG_DIST" ]; then
125        distribution=$KDEB_CHANGELOG_DIST
126# In some cases lsb_release returns the codename as n/a, which breaks dpkg-parsechangelog
127elif distribution=$(lsb_release -cs 2>/dev/null) && [ -n "$distribution" ] && [ "$distribution" != "n/a" ]; then
128        : # nothing to do in this case
129else
130        distribution="unstable"
131        echo >&2 "Using default distribution of 'unstable' in the changelog"
132        echo >&2 "Install lsb-release or set \$KDEB_CHANGELOG_DIST explicitly"
133fi
134
135mkdir -p debian/source/
136echo "1.0" > debian/source/format
137
138echo $debarch > debian/arch
139extra_build_depends=", $(if_enabled_echo CONFIG_UNWINDER_ORC libelf-dev)"
140extra_build_depends="$extra_build_depends, $(if_enabled_echo CONFIG_SYSTEM_TRUSTED_KEYRING libssl-dev:native)"
141
142# Generate a simple changelog template
143cat <<EOF > debian/changelog
144$sourcename ($packageversion) $distribution; urgency=low
145
146  * Custom built Linux kernel.
147
148 -- $maintainer  $(date -R)
149EOF
150
151# Generate copyright file
152cat <<EOF > debian/copyright
153This is a packacked upstream version of the Linux kernel.
154
155The sources may be found at most Linux archive sites, including:
156https://www.kernel.org/pub/linux/kernel
157
158Copyright: 1991 - 2018 Linus Torvalds and others.
159
160The git repository for mainline kernel development is at:
161git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
162
163    This program is free software; you can redistribute it and/or modify
164    it under the terms of the GNU General Public License as published by
165    the Free Software Foundation; version 2 dated June, 1991.
166
167On Debian GNU/Linux systems, the complete text of the GNU General Public
168License version 2 can be found in \`/usr/share/common-licenses/GPL-2'.
169EOF
170
171# Generate a control file
172cat <<EOF > debian/control
173Source: $sourcename
174Section: kernel
175Priority: optional
176Maintainer: $maintainer
177Build-Depends: bc, kmod, cpio, bison, flex | flex:native $extra_build_depends
178Homepage: http://www.kernel.org/
179
180Package: $packagename
181Architecture: $debarch
182Description: Linux kernel, version $version
183 This package contains the Linux kernel, modules and corresponding other
184 files, version: $version.
185
186Package: $kernel_headers_packagename
187Architecture: $debarch
188Description: Linux kernel headers for $version on $debarch
189 This package provides kernel header files for $version on $debarch
190 .
191 This is useful for people who need to build external modules
192
193Package: linux-libc-dev
194Section: devel
195Provides: linux-kernel-headers
196Architecture: $debarch
197Description: Linux support headers for userspace development
198 This package provides userspaces headers from the Linux kernel.  These headers
199 are used by the installed headers for GNU glibc and other system libraries.
200Multi-Arch: same
201
202Package: $dbg_packagename
203Section: debug
204Architecture: $debarch
205Description: Linux kernel debugging symbols for $version
206 This package will come in handy if you need to debug the kernel. It provides
207 all the necessary debug symbols for the kernel and its modules.
208EOF
209
210cat <<EOF > debian/rules
211#!$(command -v $MAKE) -f
212
213srctree ?= .
214
215build:
216	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
217	KBUILD_BUILD_VERSION=${revision} -f \$(srctree)/Makefile
218
219binary-arch:
220	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
221	KBUILD_BUILD_VERSION=${revision} -f \$(srctree)/Makefile intdeb-pkg
222
223clean:
224	rm -rf debian/*tmp debian/files
225	\$(MAKE) clean
226
227binary: binary-arch
228EOF
229chmod +x debian/rules
230
231exit 0
232