#!/bin/bash -e
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Script to install everything needed to build chromium (well, ideally, anyway)
# See http://code.google.com/p/chromium/wiki/LinuxBuildInstructions
# and http://code.google.com/p/chromium/wiki/LinuxBuild64Bit
usage() {
echo "Usage: $0 [--options]"
echo "Options:"
echo "--[no-]syms: enable or disable installation of debugging symbols"
echo "--[no-]lib32: enable or disable installation of 32 bit libraries"
echo "--[no-]arm: enable or disable installation of arm cross toolchain"
echo "--[no-]chromeos-fonts: enable or disable installation of Chrome OS"\
"fonts"
echo "--[no-]nacl: enable or disable installation of prerequisites for"\
"building standalone NaCl and all its toolchains"
echo "--no-prompt: silently select standard options/defaults"
echo "--quick-check: quickly try to determine if dependencies are installed"
echo " (this avoids interactive prompts and sudo commands,"
echo " so might not be 100% accurate)"
echo "--unsupported: attempt installation even on unsupported systems"
echo "Script will prompt interactively if options not given."
exit 1
}
# Checks whether a particular package is available in the repos.
# USAGE: $ package_exists <package name>
package_exists() {
apt-cache pkgnames | grep -x "$1" > /dev/null 2>&1
}
# These default to on because (some) bots need them and it keeps things
# simple for the bot setup if all bots just run the script in its default
# mode. Developers who don't want stuff they don't need installed on their
# own workstations can pass --no-arm --no-nacl when running the script.
do_inst_arm=1
do_inst_nacl=1
while test "$1" != ""
do
case "$1" in
--syms) do_inst_syms=1;;
--no-syms) do_inst_syms=0;;
--lib32) do_inst_lib32=1;;
--no-lib32) do_inst_lib32=0;;
--arm) do_inst_arm=1;;
--no-arm) do_inst_arm=0;;
--chromeos-fonts) do_inst_chromeos_fonts=1;;
--no-chromeos-fonts) do_inst_chromeos_fonts=0;;
--nacl) do_inst_nacl=1;;
--no-nacl) do_inst_nacl=0;;
--no-prompt) do_default=1
do_quietly="-qq --assume-yes"
;;
--quick-check) do_quick_check=1;;
--unsupported) do_unsupported=1;;
*) usage;;
esac
shift
done
# Check for lsb_release command in $PATH
if ! which lsb_release > /dev/null; then
echo "ERROR: lsb_release not found in \$PATH" >&2
exit 1;
fi
lsb_release=$(lsb_release --codename --short)
ubuntu_codenames="(precise|quantal|raring|saucy|trusty)"
if [ 0 -eq "${do_unsupported-0}" ] && [ 0 -eq "${do_quick_check-0}" ] ; then
if [[ ! $lsb_release =~ $ubuntu_codenames ]]; then
echo "ERROR: Only Ubuntu 12.04 (precise) through 14.04 (trusty) are"\
"currently supported" >&2
exit 1
fi
if ! uname -m | egrep -q "i686|x86_64"; then
echo "Only x86 architectures are currently supported" >&2
exit
fi
fi
if [ "x$(id -u)" != x0 ] && [ 0 -eq "${do_quick_check-0}" ]; then
echo "Running as non-root user."
echo "You might have to enter your password one or more times for 'sudo'."
echo
fi
# Packages needed for chromeos only
chromeos_dev_list="libbluetooth-dev"
# Packages needed for development
dev_list="apache2.2-bin bison curl dpkg-dev elfutils devscripts fakeroot flex
fonts-thai-tlwg g++ git-core gperf language-pack-da language-pack-fr
language-pack-he language-pack-zh-hant libapache2-mod-php5
libasound2-dev libbrlapi-dev libbz2-dev libcairo2-dev libcap-dev
libcups2-dev libcurl4-gnutls-dev libdrm-dev libelf-dev libexif-dev
libgconf2-dev libgl1-mesa-dev libglib2.0-dev libglu1-mesa-dev
libgnome-keyring-dev libgtk2.0-dev libkrb5-dev libnspr4-dev
libnss3-dev libpam0g-dev libpci-dev libpulse-dev libsctp-dev
libspeechd-dev libsqlite3-dev libssl-dev libudev-dev libwww-perl
libxslt1-dev libxss-dev libxt-dev libxtst-dev mesa-common-dev openbox
patch perl php5-cgi pkg-config python python-cherrypy3 python-dev
python-psutil rpm ruby subversion ttf-dejavu-core ttf-indic-fonts
ttf-kochi-gothic ttf-kochi-mincho wdiff xfonts-mathml zip
$chromeos_dev_list"
# 64-bit systems need a minimum set of 32-bit compat packages for the pre-built
# NaCl binaries. These are always needed, regardless of whether or not we want
# the full 32-bit "cross-compile" support (--lib32).
if file /sbin/init | grep -q 'ELF 64-bit'; then
dev_list="${dev_list} libc6-i386 lib32gcc1 lib32stdc++6"
fi
# Run-time libraries required by chromeos only
chromeos_lib_list="libpulse0 libbz2-1.0"
# Full list of required run-time libraries
lib_list="libatk1.0-0 libc6 libasound2 libcairo2 libcap2 libcups2 libexpat1
libexif12 libfontconfig1 libfreetype6 libglib2.0-0 libgnome-keyring0
libgtk2.0-0 libpam0g libpango1.0-0 libpci3 libpcre3 libpixman-1-0
libpng12-0 libspeechd2 libstdc++6 libsqlite3-0 libx11-6
libxau6 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxdmcp6
libxext6 libxfixes3 libxi6 libxinerama1 libxrandr2 libxrender1
libxtst6 zlib1g $chromeos_lib_list"
# Debugging symbols for all of the run-time libraries
dbg_list="libatk1.0-dbg libc6-dbg libcairo2-dbg libfontconfig1-dbg
libglib2.0-0-dbg libgtk2.0-0-dbg libpango1.0-0-dbg libpcre3-dbg
libpixman-1-0-dbg libsqlite3-0-dbg libx11-6-dbg libxau6-dbg
libxcb1-dbg libxcomposite1-dbg libxcursor1-dbg libxdamage1-dbg
libxdmcp6-dbg libxext6-dbg libxfixes3-dbg libxi6-dbg libxinerama1-dbg
libxrandr2-dbg libxrender1-dbg libxtst6-dbg zlib1g-dbg
libstdc++6-4.6-dbg"
# arm cross toolchain packages needed to build chrome on armhf
arm_list="libc6-dev-armhf-cross
linux-libc-dev-armhf-cross
g++-arm-linux-gnueabihf"
# Packages to build NaCl, its toolchains, and its ports.
nacl_list="autoconf bison cmake g++-mingw-w64-i686 gawk lib32z1-dev
libasound2:i386 libcap2:i386 libelf-dev:i386 libexif12:i386
libfontconfig1:i386 libgconf-2-4:i386 libglib2.0-0:i386 libgpm2:i386
libgtk2.0-0:i386 libncurses5:i386 libnss3:i386 libpango1.0-0:i386
libssl0.9.8:i386 libtinfo-dev libtinfo-dev:i386 libtool
libxcomposite1:i386 libxcursor1:i386 libxdamage1:i386 libxi6:i386
libxrandr2:i386 libxss1:i386 libxtst6:i386 texinfo xvfb"
# Find the proper version of libgbm-dev. We can't just install libgbm-dev as
# it depends on mesa, and only one version of mesa can exists on the system.
# Hence we must match the same version or this entire script will fail.
mesa_variant=""
for variant in "-lts-quantal" "-lts-raring" "-lts-saucy"; do
if $(dpkg-query -Wf'${Status}' libgl1-mesa-glx${variant} | \
grep -q " ok installed"); then
mesa_variant="${variant}"
fi
done
dev_list="${dev_list} libgbm-dev${mesa_variant}"
nacl_list="${nacl_list} libgl1-mesa-glx${mesa_variant}:i386"
# Some package names have changed over time
if package_exists ttf-mscorefonts-installer; then
dev_list="${dev_list} ttf-mscorefonts-installer"
else
dev_list="${dev_list} msttcorefonts"
fi
if package_exists libnspr4-dbg; then
dbg_list="${dbg_list} libnspr4-dbg libnss3-dbg"
lib_list="${lib_list} libnspr4 libnss3"
else
dbg_list="${dbg_list} libnspr4-0d-dbg libnss3-1d-dbg"
lib_list="${lib_list} libnspr4-0d libnss3-1d"
fi
if package_exists libjpeg-dev; then
dev_list="${dev_list} libjpeg-dev"
else
dev_list="${dev_list} libjpeg62-dev"
fi
if package_exists libudev1; then
dev_list="${dev_list} libudev1"
nacl_list="${nacl_list} libudev1:i386"
else
dev_list="${dev_list} libudev0"
nacl_list="${nacl_list} libudev0:i386"
fi
if package_exists libbrlapi0.6; then
dev_list="${dev_list} libbrlapi0.6"
else
dev_list="${dev_list} libbrlapi0.5"
fi
# Some packages are only needed if the distribution actually supports
# installing them.
if package_exists appmenu-gtk; then
lib_list="$lib_list appmenu-gtk"
fi
# Waits for the user to press 'Y' or 'N'. Either uppercase of lowercase is
# accepted. Returns 0 for 'Y' and 1 for 'N'. If an optional parameter has
# been provided to yes_no(), the function also accepts RETURN as a user input.
# The parameter specifies the exit code that should be returned in that case.
# The function will echo the user's selection followed by a newline character.
# Users can abort the function by pressing CTRL-C. This will call "exit 1".
yes_no() {
if [ 0 -ne "${do_default-0}" ] ; then
[ $1 -eq 0 ] && echo "Y" || echo "N"
return $1
fi
local c
while :; do
c="$(trap 'stty echo -iuclc icanon 2>/dev/null' EXIT INT TERM QUIT
stty -echo iuclc -icanon 2>/dev/null
dd count=1 bs=1 2>/dev/null | od -An -tx1)"
case "$c" in
" 0a") if [ -n "$1" ]; then
[ $1 -eq 0 ] && echo "Y" || echo "N"
return $1
fi
;;
" 79") echo "Y"
return 0
;;
" 6e") echo "N"
return 1
;;
"") echo "Aborted" >&2
exit 1
;;
*) # The user pressed an unrecognized key. As we are not echoing
# any incorrect user input, alert the user by ringing the bell.
(tput bel) 2>/dev/null
;;
esac
done
}
if test "$do_inst_syms" = "" && test 0 -eq ${do_quick_check-0}
then
echo "This script installs all tools and libraries needed to build Chromium."
echo ""
echo "For most of the libraries, it can also install debugging symbols, which"
echo "will allow you to debug code in the system libraries. Most developers"
echo "won't need these symbols."
echo -n "Do you want me to install them for you (y/N) "
if yes_no 1; then
do_inst_syms=1
fi
fi
if test "$do_inst_syms" = "1"; then
echo "Including debugging symbols."
else
echo "Skipping debugging symbols."
dbg_list=
fi
# When cross building for arm on 64-bit systems the host binaries
# that are part of v8 need to be compiled with -m32 which means
# that basic multilib support is needed.
if file /sbin/init | grep -q 'ELF 64-bit'; then
if [ "$lsb_release" = "trusty" ]; then
# gcc-multilib conflicts with the arm cross compiler in trusty but
# g++-4.8-multilib gives us the 32-bit support that we need.
arm_list="$arm_list g++-4.8-multilib"
else
arm_list="$arm_list g++-multilib"
fi
fi
if test "$do_inst_arm" = "1" ; then
echo "Including ARM cross toolchain."
else
echo "Skipping ARM cross toolchain."
arm_list=
fi
if test "$do_inst_nacl" = "1"; then
echo "Including NaCl, NaCl toolchain, NaCl ports dependencies."
else
echo "Skipping NaCl, NaCl toolchain, NaCl ports dependencies."
nacl_list=
fi
packages="$(
echo "${dev_list} ${lib_list} ${dbg_list} ${arm_list} ${nacl_list}" |
tr " " "\n" | sort -u | tr "\n" " "
)"
if [ 1 -eq "${do_quick_check-0}" ] ; then
failed_check="$(dpkg-query -W -f '${PackageSpec}:${Status}\n' \
${packages} 2>&1 | grep -v "ok installed" || :)"
if [ -n "${failed_check}" ]; then
echo
nomatch="$(echo "${failed_check}" | \
sed -e "s/^No packages found matching \(.*\).$/\1/;t;d")"
missing="$(echo "${failed_check}" | \
sed -e "/^No packages found matching/d;s/^\(.*\):.*$/\1/")"
if [ "$nomatch" ]; then
# Distinguish between packages that actually aren't available to the
# system (i.e. not in any repo) and packages that just aren't known to
# dpkg (i.e. managed by apt).
unknown=""
for p in ${nomatch}; do
if apt-cache show ${p} > /dev/null 2>&1; then
missing="${p}\n${missing}"
else
unknown="${p}\n${unknown}"
fi
done
if [ -n "${unknown}" ]; then
echo "WARNING: The following packages are unknown to your system"
echo "(maybe missing a repo or need to 'sudo apt-get update'):"
echo -e "${unknown}" | sed -e "s/^/ /"
fi
fi
if [ -n "${missing}" ]; then
echo "WARNING: The following packages are not installed:"
echo -e "${missing}" | sed -e "s/^/ /"
fi
exit 1
fi
exit 0
fi
sudo apt-get update
# We initially run "apt-get" with the --reinstall option and parse its output.
# This way, we can find all the packages that need to be newly installed
# without accidentally promoting any packages from "auto" to "manual".
# We then re-run "apt-get" with just the list of missing packages.
echo "Finding missing packages..."
# Intentionally leaving $packages unquoted so it's more readable.
echo "Packages required: " $packages
echo
new_list_cmd="sudo apt-get install --reinstall $(echo $packages)"
if new_list="$(yes n | LANGUAGE=en LANG=C $new_list_cmd)"; then
# We probably never hit this following line.
echo "No missing packages, and the packages are up-to-date."
elif [ $? -eq 1 ]; then
# We expect apt-get to have exit status of 1.
# This indicates that we cancelled the install with "yes n|".
new_list=$(echo "$new_list" |
sed -e '1,/The following NEW packages will be installed:/d;s/^ //;t;d')
new_list=$(echo "$new_list" | sed 's/ *$//')
if [ -z "$new_list" ] ; then
echo "No missing packages, and the packages are up-to-date."
else
echo "Installing missing packages: $new_list."
sudo apt-get install ${do_quietly-} ${new_list}
fi
echo
else
# An apt-get exit status of 100 indicates that a real error has occurred.
# I am intentionally leaving out the '"'s around new_list_cmd,
# as this makes it easier to cut and paste the output
echo "The following command failed: " ${new_list_cmd}
echo
echo "It produces the following output:"
yes n | $new_list_cmd || true
echo
echo "You will have to install the above packages yourself."
echo
exit 100
fi
# Install the Chrome OS default fonts. This must go after running
# apt-get, since install-chromeos-fonts depends on curl.
if test "$do_inst_chromeos_fonts" != "0"; then
echo
echo "Installing Chrome OS fonts."
dir=`echo $0 | sed -r -e 's/\/[^/]+$//'`
if ! sudo $dir/linux/install-chromeos-fonts.py; then
echo "ERROR: The installation of the Chrome OS default fonts failed."
if [ `stat -f -c %T $dir` == "nfs" ]; then
echo "The reason is that your repo is installed on a remote file system."
else
echo "This is expected if your repo is installed on a remote file system."
fi
echo "It is recommended to install your repo on a local file system."
echo "You can skip the installation of the Chrome OS default founts with"
echo "the command line option: --no-chromeos-fonts."
exit 1
fi
else
echo "Skipping installation of Chrome OS fonts."
fi
if test "$do_inst_nacl" = "1"; then
echo "Installing symbolic links for NaCl."
if [ ! -r /usr/lib/i386-linux-gnu/libcrypto.so ]; then
sudo ln -fs libcrypto.so.0.9.8 /usr/lib/i386-linux-gnu/libcrypto.so
fi
if [ ! -r /usr/lib/i386-linux-gnu/libssl.so ]; then
sudo ln -fs libssl.so.0.9.8 /usr/lib/i386-linux-gnu/libssl.so
fi
else
echo "Skipping symbolic links for NaCl."
fi
# Install 32bit backwards compatibility support for 64bit systems
if file /sbin/init | grep -q 'ELF 64-bit'; then
if test "$do_inst_lib32" != "1"
then
echo "NOTE: If you were expecting the option to install 32bit libs,"
echo "please run with the --lib32 flag."
echo
echo "Installation complete."
exit 0
else
# This conditional statement has been added to deprecate and eventually
# remove support for 32bit libraries on 64bit systems. But for the time
# being, we still have to support a few legacy systems (e.g. bots), where
# this feature is needed.
# We only even give the user the option to install these libraries, if
# they explicitly requested doing so by setting the --lib32 command line
# flag.
# And even then, we interactively ask them one more time whether they are
# absolutely sure.
# In order for that to work, we must reset the ${do_inst_lib32} variable.
# There are other ways to achieve the same goal. But resetting the
# variable is the best way to document the intended behavior -- and to
# allow us to gradually deprecate and then remove the obsolete code.
if test "${do_default-0}" -ne 1; then
do_inst_lib32=
fi
fi
echo "WARNING"
echo
echo "We no longer recommend that you use this script to install"
echo "32bit libraries on a 64bit system. Instead, consider using the"
echo "install-chroot.sh script to help you set up a 32bit environment"
echo "for building and testing 32bit versions of Chrome."
echo
echo "The code for installing 32bit libraries on a 64bit system is"
echo "unmaintained and might not work with modern versions of Ubuntu"
echo "or Debian."
if test "$do_inst_lib32" != "" ; then
echo
echo -n "Are you sure you want to proceed (y/N) "
if yes_no 1; then
do_inst_lib32=1
fi
fi
if test "$do_inst_lib32" != "1"
then
exit 0
fi
# Standard 32bit compatibility libraries
echo "First, installing the limited existing 32-bit support..."
cmp_list="ia32-libs lib32asound2-dev lib32stdc++6 lib32z1
lib32z1-dev libc6-dev-i386 libc6-i386 g++-multilib"
if [ -n "`apt-cache search lib32readline-gplv2-dev 2>/dev/null`" ]; then
cmp_list="${cmp_list} lib32readline-gplv2-dev"
else
cmp_list="${cmp_list} lib32readline5-dev"
fi
sudo apt-get install ${do_quietly-} $cmp_list
tmp=/tmp/install-32bit.$$
trap 'rm -rf "${tmp}"' EXIT INT TERM QUIT
mkdir -p "${tmp}/apt/lists/partial" "${tmp}/cache" "${tmp}/partial"
touch "${tmp}/status"
[ -r /etc/apt/apt.conf ] && cp /etc/apt/apt.conf "${tmp}/apt/"
cat >>"${tmp}/apt/apt.conf" <<EOF
Apt::Architecture "i386";
Dir::Cache "${tmp}/cache";
Dir::Cache::Archives "${tmp}/";
Dir::State::Lists "${tmp}/apt/lists/";
Dir::State::status "${tmp}/status";
EOF
# Download 32bit packages
echo "Computing list of available 32bit packages..."
sudo apt-get -c="${tmp}/apt/apt.conf" update
echo "Downloading available 32bit packages..."
sudo apt-get -c="${tmp}/apt/apt.conf" \
--yes --download-only --force-yes --reinstall install \
${lib_list} ${dbg_list}
# Open packages, remove everything that is not a library, move the
# library to a lib32 directory and package everything as a *.deb file.
echo "Repackaging and installing 32bit packages for use on 64bit systems..."
for i in ${lib_list} ${dbg_list}; do
orig="$(echo "${tmp}/${i}"_*_i386.deb)"
compat="$(echo "${orig}" |
sed -e 's,\(_[^_/]*_\)i386\(.deb\),-ia32\1amd64\2,')"
rm -rf "${tmp}/staging"
msg="$(fakeroot -u sh -exc '
# Unpack 32bit Debian archive
umask 022
mkdir -p "'"${tmp}"'/staging/dpkg/DEBIAN"
cd "'"${tmp}"'/staging"
ar x "'${orig}'"
tar Cfx dpkg data.tar*
tar zCfx dpkg/DEBIAN control.tar.gz
# Create a posix extended regular expression fragment that will
# recognize the includes which have changed. Should be rare,
# will almost always be empty.
includes=`sed -n -e "s/^[0-9a-z]* //g" \
-e "\,usr/include/,p" dpkg/DEBIAN/md5sums |
xargs -n 1 -I FILE /bin/sh -c \
"cmp -s dpkg/FILE /FILE || echo FILE" |
tr "\n" "|" |
sed -e "s,|$,,"`
# If empty, set it to not match anything.
test -z "$includes" && includes="^//"
# Turn the conflicts into an extended RE for removal from the
# Provides line.
conflicts=`sed -n -e "/Conflicts/s/Conflicts: *//;T;s/, */|/g;p" \
dpkg/DEBIAN/control`
# Rename package, change architecture, remove conflicts and dependencies
sed -r -i \
-e "/Package/s/$/-ia32/" \
-e "/Architecture/s/:.*$/: amd64/" \
-e "/Depends/s/:.*/: ia32-libs/" \
-e "/Provides/s/($conflicts)(, *)?//g;T1;s/, *$//;:1" \
-e "/Recommends/d" \
-e "/Conflicts/d" \
dpkg/DEBIAN/control
# Only keep files that live in "lib" directories or the includes
# that have changed.
sed -r -i \
-e "/\/lib64\//d" -e "/\/.?bin\//d" \
-e "\,$includes,s,[ /]include/,&32/,g;s,include/32/,include32/,g" \
-e "s, lib/, lib32/,g" \
-e "s,/lib/,/lib32/,g" \
-e "t;d" \
-e "\,^/usr/lib32/debug\(.*/lib32\),s,^/usr/lib32/debug,/usr/lib/debug," \
dpkg/DEBIAN/md5sums
# Re-run ldconfig after installation/removal
{ echo "#!/bin/sh"; echo "[ \"x\$1\" = xconfigure ]&&ldconfig||:"; } \
>dpkg/DEBIAN/postinst
{ echo "#!/bin/sh"; echo "[ \"x\$1\" = xremove ]&&ldconfig||:"; } \
>dpkg/DEBIAN/postrm
chmod 755 dpkg/DEBIAN/postinst dpkg/DEBIAN/postrm
# Remove any other control files
find dpkg/DEBIAN -mindepth 1 "(" -name control -o -name md5sums -o \
-name postinst -o -name postrm ")" -o -print |
xargs -r rm -rf
# Remove any files/dirs that live outside of "lib" directories,
# or are not in our list of changed includes.
find dpkg -mindepth 1 -regextype posix-extended \
"(" -name DEBIAN -o -name lib -o -regex "dpkg/($includes)" ")" \
-prune -o -print | tac |
xargs -r -n 1 sh -c "rm \$0 2>/dev/null || rmdir \$0 2>/dev/null || : "
find dpkg -name lib64 -o -name bin -o -name "?bin" |
tac | xargs -r rm -rf
# Remove any symbolic links that were broken by the above steps.
find -L dpkg -type l -print | tac | xargs -r rm -rf
# Rename lib to lib32, but keep debug symbols in /usr/lib/debug/usr/lib32
# That is where gdb looks for them.
find dpkg -type d -o -path "*/lib/*" -print |
xargs -r -n 1 sh -c "
i=\$(echo \"\${0}\" |
sed -e s,/lib/,/lib32/,g \
-e s,/usr/lib32/debug\\\\\(.*/lib32\\\\\),/usr/lib/debug\\\\1,);
mkdir -p \"\${i%/*}\";
mv \"\${0}\" \"\${i}\""
# Rename include to include32.
[ -d "dpkg/usr/include" ] && mv "dpkg/usr/include" "dpkg/usr/include32"
# Prune any empty directories
find dpkg -type d | tac | xargs -r -n 1 rmdir 2>/dev/null || :
# Create our own Debian package
cd ..
dpkg --build staging/dpkg .' 2>&1)"
compat="$(eval echo $(echo "${compat}" |
sed -e 's,_[^_/]*_amd64.deb,_*_amd64.deb,'))"
[ -r "${compat}" ] || {
echo "${msg}" >&2
echo "Failed to build new Debian archive!" >&2
exit 1
}
msg="$(sudo dpkg -i "${compat}" 2>&1)" && {
echo "Installed ${compat##*/}"
} || {
# echo "${msg}" >&2
echo "Skipped ${compat##*/}"
}
done
# Add symbolic links for developing 32bit code
echo "Adding missing symbolic links, enabling 32bit code development..."
for i in $(find /lib32 /usr/lib32 -maxdepth 1 -name \*.so.\* |
sed -e 's/[.]so[.][0-9].*/.so/' |
sort -u); do
[ "x${i##*/}" = "xld-linux.so" ] && continue
[ -r "$i" ] && continue
j="$(ls "$i."* | sed -e 's/.*[.]so[.]\([^.]*\)$/\1/;t;d' |
sort -n | tail -n 1)"
[ -r "$i.$j" ] || continue
sudo ln -s "${i##*/}.$j" "$i"
done
fi