xref: /linux/scripts/package/mkdebian (revision 7e548e9a54bf4ca420f1874e4a602cafe0ed7671) 
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" $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 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/
136echo $debarch > debian/arch
137extra_build_depends=", $(if_enabled_echo CONFIG_UNWINDER_ORC libelf-dev)"
138extra_build_depends="$extra_build_depends, $(if_enabled_echo CONFIG_SYSTEM_TRUSTED_KEYRING libssl-dev:native)"
139
140# Generate a simple changelog template
141cat <<EOF > debian/changelog
142$sourcename ($packageversion) $distribution; urgency=low
143
144  * Custom built Linux kernel.
145
146 -- $maintainer  $(date -R)
147EOF
148
149# Generate copyright file
150cat <<EOF > debian/copyright
151This is a packacked upstream version of the Linux kernel.
152
153The sources may be found at most Linux archive sites, including:
154https://www.kernel.org/pub/linux/kernel
155
156Copyright: 1991 - 2018 Linus Torvalds and others.
157
158The git repository for mainline kernel development is at:
159git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
160
161    This program is free software; you can redistribute it and/or modify
162    it under the terms of the GNU General Public License as published by
163    the Free Software Foundation; version 2 dated June, 1991.
164
165On Debian GNU/Linux systems, the complete text of the GNU General Public
166License version 2 can be found in \`/usr/share/common-licenses/GPL-2'.
167EOF
168
169# Generate a control file
170cat <<EOF > debian/control
171Source: $sourcename
172Section: kernel
173Priority: optional
174Maintainer: $maintainer
175Build-Depends: bc, kmod, cpio, bison, flex | flex:native $extra_build_depends
176Homepage: http://www.kernel.org/
177
178Package: $packagename
179Architecture: $debarch
180Description: Linux kernel, version $version
181 This package contains the Linux kernel, modules and corresponding other
182 files, version: $version.
183
184Package: $kernel_headers_packagename
185Architecture: $debarch
186Description: Linux kernel headers for $version on $debarch
187 This package provides kernel header files for $version on $debarch
188 .
189 This is useful for people who need to build external modules
190
191Package: linux-libc-dev
192Section: devel
193Provides: linux-kernel-headers
194Architecture: $debarch
195Description: Linux support headers for userspace development
196 This package provides userspaces headers from the Linux kernel.  These headers
197 are used by the installed headers for GNU glibc and other system libraries.
198
199Package: $dbg_packagename
200Section: debug
201Architecture: $debarch
202Description: Linux kernel debugging symbols for $version
203 This package will come in handy if you need to debug the kernel. It provides
204 all the necessary debug symbols for the kernel and its modules.
205EOF
206
207cat <<EOF > debian/rules
208#!$(command -v $MAKE) -f
209
210srctree ?= .
211
212build:
213	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
214	KBUILD_BUILD_VERSION=${revision} -f \$(srctree)/Makefile
215
216binary-arch:
217	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
218	KBUILD_BUILD_VERSION=${revision} -f \$(srctree)/Makefile intdeb-pkg
219
220clean:
221	rm -rf debian/*tmp debian/files
222	\$(MAKE) clean
223
224binary: binary-arch
225EOF
226
227exit 0
228