Add --arm option to install-build-deps.sh.

build/install-build-deps.sh

 #!/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-prompt: silently select standard options/defaults"
   echo "Script will prompt interactively if options not given."
   exit 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;;
   --no-prompt)              do_default=1
                             do_quietly="-qq --assume-yes"
     ;;
   *) usage;;
   esac
   shift
 done
 
-if ! egrep -q \
-    'Ubuntu (10\.04|10\.10|11\.04|11\.10|12\.04|lucid|maverick|natty|oneiric|precise)' \
-    /etc/issue; then
-  echo "Only Ubuntu 10.04 (lucid) through 12.04 (precise) are currently" \
+ubuntu_versions="10\.04|10\.10|11\.04|11\.10|12\.04"
+ubuntu_codenames="lucid|maverick|natty|oneiric|precise"
+
+if ! egrep -q "Ubuntu ($ubuntu_versions|$ubuntu_codenames)" /etc/issue; then
+  echo "ERROR: Only Ubuntu 10.04 (lucid) through 12.04 (precise) 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
 
 if [ "x$(id -u)" != x0 ]; then
@@ skipping 38 matching lines @@
           $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"
 
+# arm cross toolchain packages needed to build chrome on arm
+arm_list="libc6-armel-cross libc6-dev-armel-cross libgcc1-armel-cross
+          libgomp1-armel-cross linux-libc-dev-armel-cross
+          libgcc1-dbg-armel-cross libgomp1-dbg-armel-cross
+          binutils-arm-linux-gnueabi cpp-arm-linux-gnueabi
+          gcc-arm-linux-gnueabi g++-arm-linux-gnueabi
+          cpp-4.5-arm-linux-gnueabi gcc-4.5-arm-linux-gnueabi
+          g++-4.5-arm-linux-gnueabi libmudflap0-dbg-armel-cross"
+
 # Plugin lists needed for tests.
 plugin_list="flashplugin-installer"
 
 # Some package names have changed over time
 if apt-cache show ttf-mscorefonts-installer >/dev/null 2>&1; then
   dev_list="${dev_list} ttf-mscorefonts-installer"
 else
   dev_list="${dev_list} msttcorefonts"
 fi
 if apt-cache show libnspr4-dbg >/dev/null 2>&1; then
@@ skipping 65 matching lines @@
     do_inst_syms=1
   fi
 fi
 if test "$do_inst_syms" = "1"; then
   echo "Installing debugging symbols."
 else
   echo "Skipping installation of debugging symbols."
   dbg_list=
 fi
 
+if test "$do_inst_arm" = "1"; then
+  . /etc/lsb-release
+  if test "$DISTRIB_CODENAME" != "precise"; then
+    echo "ERROR: Installing the ARM cross toolchain is only available on" \
+         "Ubuntu precise." >&2
+    exit 1
+  fi
+  echo "Installing ARM cross toolchain."
+else
+  echo "Skipping installation of ARM cross toolchain."
+  arm_list=
+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..."
-packages="${dev_list} ${lib_list} ${dbg_list} ${plugin_list}"
+packages="${dev_list} ${lib_list} ${dbg_list} ${plugin_list} ${arm_list}"
 # 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 | 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 [ $? -eq 1 ]; then
   # We expect apt-get to have exit status of 1.
   # This indicates that we cancelled the install with "yes n|".
@@ skipping 208 matching lines @@
              sed -e 's/[.]so[.][0-9].*/.so/' |
              sort -u); do
     [ "x${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