xref: /linux/scripts/package/mkdebian (revision dc0d1c4519095a6c6bbd9ec4a808674aba502741) 
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
91else
92	revision=$(cat .version 2>/dev/null||echo 1)
93	packageversion=$version-$revision
94fi
95sourcename=$KDEB_SOURCENAME
96packagename=linux-image-$version
97kernel_headers_packagename=linux-headers-$version
98dbg_packagename=$packagename-dbg
99debarch=
100set_debarch
101
102if [ "$ARCH" = "um" ] ; then
103	packagename=user-mode-linux-$version
104fi
105
106email=${DEBEMAIL-$EMAIL}
107
108# use email string directly if it contains <email>
109if echo $email | grep -q '<.*>'; then
110	maintainer=$email
111else
112	# or construct the maintainer string
113	user=${KBUILD_BUILD_USER-$(id -nu)}
114	name=${DEBFULLNAME-$user}
115	if [ -z "$email" ]; then
116		buildhost=${KBUILD_BUILD_HOST-$(hostname -f 2>/dev/null || hostname)}
117		email="$user@$buildhost"
118	fi
119	maintainer="$name <$email>"
120fi
121
122# Try to determine distribution
123if [ -n "$KDEB_CHANGELOG_DIST" ]; then
124        distribution=$KDEB_CHANGELOG_DIST
125# In some cases lsb_release returns the codename as n/a, which breaks dpkg-parsechangelog
126elif distribution=$(lsb_release -cs 2>/dev/null) && [ -n "$distribution" ] && [ "$distribution" != "n/a" ]; then
127        : # nothing to do in this case
128else
129        distribution="unstable"
130        echo >&2 "Using default distribution of 'unstable' in the changelog"
131        echo >&2 "Install lsb-release or set \$KDEB_CHANGELOG_DIST explicitly"
132fi
133
134mkdir -p debian/
135echo $debarch > debian/arch
136
137# Generate a simple changelog template
138cat <<EOF > debian/changelog
139$sourcename ($packageversion) $distribution; urgency=low
140
141  * Custom built Linux kernel.
142
143 -- $maintainer  $(date -R)
144EOF
145
146# Generate copyright file
147cat <<EOF > debian/copyright
148This is a packacked upstream version of the Linux kernel.
149
150The sources may be found at most Linux archive sites, including:
151https://www.kernel.org/pub/linux/kernel
152
153Copyright: 1991 - 2018 Linus Torvalds and others.
154
155The git repository for mainline kernel development is at:
156git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
157
158    This program is free software; you can redistribute it and/or modify
159    it under the terms of the GNU General Public License as published by
160    the Free Software Foundation; version 2 dated June, 1991.
161
162On Debian GNU/Linux systems, the complete text of the GNU General Public
163License version 2 can be found in \`/usr/share/common-licenses/GPL-2'.
164EOF
165
166# Generate a control file
167cat <<EOF > debian/control
168Source: $sourcename
169Section: kernel
170Priority: optional
171Maintainer: $maintainer
172Build-Depends: bc, kmod, cpio
173Homepage: http://www.kernel.org/
174
175Package: $packagename
176Architecture: $debarch
177Description: Linux kernel, version $version
178 This package contains the Linux kernel, modules and corresponding other
179 files, version: $version.
180
181Package: $kernel_headers_packagename
182Architecture: $debarch
183Description: Linux kernel headers for $version on $debarch
184 This package provides kernel header files for $version on $debarch
185 .
186 This is useful for people who need to build external modules
187
188Package: linux-libc-dev
189Section: devel
190Provides: linux-kernel-headers
191Architecture: $debarch
192Description: Linux support headers for userspace development
193 This package provides userspaces headers from the Linux kernel.  These headers
194 are used by the installed headers for GNU glibc and other system libraries.
195
196Package: $dbg_packagename
197Section: debug
198Architecture: $debarch
199Description: Linux kernel debugging symbols for $version
200 This package will come in handy if you need to debug the kernel. It provides
201 all the necessary debug symbols for the kernel and its modules.
202EOF
203
204cat <<EOF > debian/rules
205#!$(command -v $MAKE) -f
206
207build:
208	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} KBUILD_SRC=
209
210binary-arch:
211	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} KBUILD_SRC= intdeb-pkg
212
213clean:
214	rm -rf debian/*tmp debian/files
215	\$(MAKE) clean
216
217binary: binary-arch
218EOF
219
220exit 0
221