xref: /openbmc/linux/scripts/package/mkdebian (revision 31af04cd) 
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 "^CONFIG_$1=y" $KCONFIG_CONFIG
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 64BIT 64) ;;
35	s390*)
36		debarch=s390x ;;
37	ppc*)
38		if is_enabled 64BIT; then
39			debarch=ppc64$(if_enabled_echo CPU_LITTLE_ENDIAN el)
40		else
41			debarch=powerpc$(if_enabled_echo SPE spe)
42		fi
43		;;
44	parisc*)
45		debarch=hppa ;;
46	mips*)
47		if is_enabled CPU_LITTLE_ENDIAN; then
48			debarch=mips$(if_enabled_echo 64BIT 64)$(if_enabled_echo CPU_MIPSR6 r6)el
49		elif is_enabled CPU_MIPSR6; then
50			debarch=mips$(if_enabled_echo 64BIT 64)r6
51		else
52			debarch=mips
53		fi
54		;;
55	aarch64|arm64)
56		debarch=arm64 ;;
57	arm*)
58		if is_enabled AEABI; then
59			debarch=arm$(if_enabled_echo VFP hf el)
60		else
61			debarch=arm
62		fi
63		;;
64	openrisc)
65		debarch=or1k ;;
66	sh)
67		if is_enabled CPU_SH3; then
68			debarch=sh3$(if_enabled_echo CPU_BIG_ENDIAN eb)
69		elif is_enabled CPU_SH4; then
70			debarch=sh4$(if_enabled_echo 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/
136echo $debarch > debian/arch
137
138# Generate a simple changelog template
139cat <<EOF > debian/changelog
140$sourcename ($packageversion) $distribution; urgency=low
141
142  * Custom built Linux kernel.
143
144 -- $maintainer  $(date -R)
145EOF
146
147# Generate copyright file
148cat <<EOF > debian/copyright
149This is a packacked upstream version of the Linux kernel.
150
151The sources may be found at most Linux archive sites, including:
152https://www.kernel.org/pub/linux/kernel
153
154Copyright: 1991 - 2018 Linus Torvalds and others.
155
156The git repository for mainline kernel development is at:
157git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
158
159    This program is free software; you can redistribute it and/or modify
160    it under the terms of the GNU General Public License as published by
161    the Free Software Foundation; version 2 dated June, 1991.
162
163On Debian GNU/Linux systems, the complete text of the GNU General Public
164License version 2 can be found in \`/usr/share/common-licenses/GPL-2'.
165EOF
166
167# Generate a control file
168cat <<EOF > debian/control
169Source: $sourcename
170Section: kernel
171Priority: optional
172Maintainer: $maintainer
173Build-Depends: bc, kmod, cpio
174Homepage: http://www.kernel.org/
175
176Package: $packagename
177Architecture: $debarch
178Description: Linux kernel, version $version
179 This package contains the Linux kernel, modules and corresponding other
180 files, version: $version.
181
182Package: $kernel_headers_packagename
183Architecture: $debarch
184Description: Linux kernel headers for $version on $debarch
185 This package provides kernel header files for $version on $debarch
186 .
187 This is useful for people who need to build external modules
188
189Package: linux-libc-dev
190Section: devel
191Provides: linux-kernel-headers
192Architecture: $debarch
193Description: Linux support headers for userspace development
194 This package provides userspaces headers from the Linux kernel.  These headers
195 are used by the installed headers for GNU glibc and other system libraries.
196
197Package: $dbg_packagename
198Section: debug
199Architecture: $debarch
200Description: Linux kernel debugging symbols for $version
201 This package will come in handy if you need to debug the kernel. It provides
202 all the necessary debug symbols for the kernel and its modules.
203EOF
204
205cat <<EOF > debian/rules
206#!$(command -v $MAKE) -f
207
208build:
209	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
210	KBUILD_BUILD_VERSION=${revision} KBUILD_SRC=
211
212binary-arch:
213	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
214	KBUILD_BUILD_VERSION=${revision} KBUILD_SRC= intdeb-pkg
215
216clean:
217	rm -rf debian/*tmp debian/files
218	\$(MAKE) clean
219
220binary: binary-arch
221EOF
222
223exit 0
224