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
7 set -eu
8
9 is_enabled() {
10 grep -q "^$1=y" include/config/auto.conf
11 }
12
13 if_enabled_echo() {
14 if is_enabled "$1"; then
15 echo -n "$2"
16 elif [ $# -ge 3 ]; then
17 echo -n "$3"
18 fi
19 }
20
21 set_debarch() {
22 if [ "${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 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 # Create debian/source/ if it is a source package build
88 gen_source ()
89 {
90 mkdir -p debian/source
91
92 echo "3.0 (quilt)" > debian/source/format
93
94 {
95 echo "diff-ignore"
96 echo "extend-diff-ignore = .*"
97 } > debian/source/local-options
98
99 # Add .config as a patch
100 mkdir -p debian/patches
101 {
102 echo "Subject: Add .config"
103 echo "Author: ${maintainer}"
104 echo
105 echo "--- /dev/null"
106 echo "+++ linux/.config"
107 diff -u /dev/null "${KCONFIG_CONFIG}" | tail -n +3
108 } > debian/patches/config.patch
109 echo config.patch > debian/patches/series
110
111 "${srctree}/scripts/package/gen-diff-patch" debian/patches/diff.patch
112 if [ -s debian/patches/diff.patch ]; then
113 sed -i "
114 1iSubject: Add local diff
115 1iAuthor: ${maintainer}
116 1i
117 " debian/patches/diff.patch
118
119 echo diff.patch >> debian/patches/series
120 else
121 rm -f debian/patches/diff.patch
122 fi
123 }
124
125 rm -rf debian
126 mkdir debian
127
128 user=${KBUILD_BUILD_USER:-$(id -nu)}
129 name=${DEBFULLNAME:-${user}}
130 if [ "${DEBEMAIL:+set}" ]; then
131 email=${DEBEMAIL}
132 else
133 buildhost=${KBUILD_BUILD_HOST:-$(hostname -f 2>/dev/null || hostname)}
134 email="${user}@${buildhost}"
135 fi
136 maintainer="${name} <${email}>"
137
138 while [ $# -gt 0 ]; do
139 case "$1" in
140 --need-source)
141 gen_source
142 shift
143 ;;
144 *)
145 break
146 ;;
147 esac
148 done
149
150 # Some variables and settings used throughout the script
151 version=$KERNELRELEASE
152 if [ "${KDEB_PKGVERSION:+set}" ]; then
153 packageversion=$KDEB_PKGVERSION
154 else
155 packageversion=$(${srctree}/scripts/setlocalversion --no-local ${srctree})-$($srctree/scripts/build-version)
156 fi
157 sourcename=${KDEB_SOURCENAME:-linux-upstream}
158
159 if [ "$ARCH" = "um" ] ; then
160 packagename=user-mode-linux
161 else
162 packagename=linux-image
163 fi
164
165 debarch=
166 set_debarch
167
168 # Try to determine distribution
169 if [ "${KDEB_CHANGELOG_DIST:+set}" ]; then
170 distribution=$KDEB_CHANGELOG_DIST
171 # In some cases lsb_release returns the codename as n/a, which breaks dpkg-parsechangelog
172 elif distribution=$(lsb_release -cs 2>/dev/null) && [ -n "$distribution" ] && [ "$distribution" != "n/a" ]; then
173 : # nothing to do in this case
174 else
175 distribution="unstable"
176 echo >&2 "Using default distribution of 'unstable' in the changelog"
177 echo >&2 "Install lsb-release or set \$KDEB_CHANGELOG_DIST explicitly"
178 fi
179
180 echo $debarch > debian/arch
181
182 # Generate a simple changelog template
183 cat <<EOF > debian/changelog
184 $sourcename ($packageversion) $distribution; urgency=low
185
186 * Custom built Linux kernel.
187
188 -- $maintainer $(date -R)
189 EOF
190
191 # Generate a control file
192 cat <<EOF > debian/control
193 Source: $sourcename
194 Section: kernel
195 Priority: optional
196 Maintainer: $maintainer
197 Rules-Requires-Root: no
198 Build-Depends: debhelper-compat (= 12)
199 Build-Depends-Arch: bc, bison, cpio, flex, kmod, libelf-dev:native, libssl-dev:native, rsync
200 Homepage: https://www.kernel.org/
201
202 Package: $packagename-$version
203 Architecture: $debarch
204 Description: Linux kernel, version $version
205 This package contains the Linux kernel, modules and corresponding other
206 files, version: $version.
207 EOF
208
209 if [ "${SRCARCH}" != um ]; then
210 cat <<EOF >> debian/control
211
212 Package: linux-libc-dev
213 Section: devel
214 Provides: linux-kernel-headers
215 Architecture: $debarch
216 Description: Linux support headers for userspace development
217 This package provides userspaces headers from the Linux kernel. These headers
218 are used by the installed headers for GNU glibc and other system libraries.
219 Multi-Arch: same
220 EOF
221
222 if is_enabled CONFIG_MODULES; then
223 cat <<EOF >> debian/control
224
225 Package: linux-headers-$version
226 Architecture: $debarch
227 Description: Linux kernel headers for $version on $debarch
228 This package provides kernel header files for $version on $debarch
229 .
230 This is useful for people who need to build external modules
231 EOF
232 fi
233 fi
234
235 if is_enabled CONFIG_DEBUG_INFO; then
236 cat <<EOF >> debian/control
237
238 Package: linux-image-$version-dbg
239 Section: debug
240 Architecture: $debarch
241 Description: Linux kernel debugging symbols for $version
242 This package will come in handy if you need to debug the kernel. It provides
243 all the necessary debug symbols for the kernel and its modules.
244 EOF
245 fi
246
247 cat <<EOF > debian/rules.vars
248 ARCH := ${ARCH}
249 KERNELRELEASE := ${KERNELRELEASE}
250 EOF
251
252 cp "${srctree}/scripts/package/debian/copyright" debian/
253 cp "${srctree}/scripts/package/debian/rules" debian/
254
255 exit 0
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