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 $debarch > debian/arch
181
182 host_gnu=$(dpkg-architecture -a "${debarch}" -q DEB_HOST_GNU_TYPE | sed 's/_/-/g')
183
184 # Generate a simple changelog template
185 cat <<EOF > debian/changelog
186 $sourcename ($packageversion) $distribution; urgency=low
187
188 * Custom built Linux kernel.
189
190 -- $maintainer $(date -R)
191 EOF
192
193 # Generate a control file
194 cat <<EOF > debian/control
195 Source: $sourcename
196 Section: kernel
197 Priority: optional
198 Maintainer: $maintainer
199 Rules-Requires-Root: no
200 Build-Depends: debhelper-compat (= 12)
201 Build-Depends-Arch: bc, bison, cpio, flex,
202 gcc-${host_gnu} <!pkg.${sourcename}.nokernelheaders>,
203 kmod, libelf-dev:native,
204 libssl-dev:native, libssl-dev <!pkg.${sourcename}.nokernelheaders>,
205 rsync
206 Homepage: https://www.kernel.org/
207
208 Package: $packagename-$version
209 Architecture: $debarch
210 Description: Linux kernel, version $version
211 This package contains the Linux kernel, modules and corresponding other
212 files, version: $version.
213 EOF
214
215 if [ "${SRCARCH}" != um ]; then
216 cat <<EOF >> debian/control
217
218 Package: linux-libc-dev
219 Section: devel
220 Provides: linux-kernel-headers
221 Architecture: $debarch
222 Description: Linux support headers for userspace development
223 This package provides userspaces headers from the Linux kernel. These headers
224 are used by the installed headers for GNU glibc and other system libraries.
225 Multi-Arch: same
226 EOF
227
228 if is_enabled CONFIG_MODULES; then
229 cat <<EOF >> debian/control
230
231 Package: linux-headers-$version
232 Architecture: $debarch
233 Build-Profiles: <!pkg.${sourcename}.nokernelheaders>
234 Description: Linux kernel headers for $version on $debarch
235 This package provides kernel header files for $version on $debarch
236 .
237 This is useful for people who need to build external modules
238 EOF
239 fi
240 fi
241
242 if is_enabled CONFIG_DEBUG_INFO; then
243 cat <<EOF >> debian/control
244
245 Package: linux-image-$version-dbg
246 Section: debug
247 Architecture: $debarch
248 Build-Profiles: <!pkg.${sourcename}.nokerneldbg>
249 Description: Linux kernel debugging symbols for $version
250 This package will come in handy if you need to debug the kernel. It provides
251 all the necessary debug symbols for the kernel and its modules.
252 EOF
253 fi
254
255 cat <<EOF > debian/rules.vars
256 ARCH := ${ARCH}
257 KERNELRELEASE := ${KERNELRELEASE}
258 EOF
259
260 cp "${srctree}/scripts/package/debian/copyright" debian/
261 cp "${srctree}/scripts/package/debian/rules" debian/
262
263 exit 0
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