Some changes to be able to build an armel-based rootfs.

src/scripts/install_packages.sh

 #!/bin/bash
 
 # Copyright (c) 2009 The Chromium OS 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 packages into the target root file system.
 #
 # NOTE: This script should be called by build_image.sh. Do not run this
 # on your own unless you know what you are doing.
@@ skipping 239 matching lines @@
       ;;
     esac
   done
 }
 
 # Install packages from the given package-lists
 PACKAGE_LISTS=$(echo "$FLAGS_package_list" | sed -e 's/,/ /g')
 PKG_LIST_ARCH="$FLAGS_arch"
 if [ "$PKG_LIST_ARCH" = "x86" ]; then
   PKG_LIST_ARCH="i386"
+  FORCE_NO_SCRIPTS=""
+else
+  # For armel we forcefully disable all maintainer scripts.
+  # TODO: Remove this when everything is whitelisted for all build variants.
+  FORCE_NO_SCRIPTS="-o=DPkg::options::=--nodpkg_fallback"
 fi
 for p in $PACKAGE_LISTS; do
   COMPONENTS=$(filter_pkgs "$p" "$PKG_LIST_ARCH")
   sudo APT_CONFIG="$APT_CONFIG" DEBIAN_FRONTEND=noninteractive \
-       ARCH="$FLAGS_arch" apt-get --force-yes install $COMPONENTS
+    ARCH="$FLAGS_arch" \
+    apt-get $FORCE_NO_SCRIPTS --force-yes install $COMPONENTS
 done
 
 # Create kernel installation configuration to suppress warnings,
 # install the kernel in /boot, and manage symlinks.
 cat <<EOF | sudo dd of="${ROOT_FS_DIR}/etc/kernel-img.conf"
 link_in_boot = yes
 do_symlinks = yes
 minimal_swap = yes
 clobber_modules = yes
 warn_reboot = no
 do_bootloader = no
 do_initrd = yes
 warn_initrd = no
 EOF
 
 # Install the kernel.
-sudo APT_CONFIG="$APT_CONFIG" DEBIAN_FRONTEND=noninteractive ARCH="$FLAGS_arch"\
-  apt-get --force-yes install "linux-image-${KERNEL_VERSION}"
+# TODO: Support for armel kernels.
+if [ "$FLAGS_arch" = "x86" ]; then
+  sudo APT_CONFIG="$APT_CONFIG" DEBIAN_FRONTEND=noninteractive ARCH="$FLAGS_arch"\
+    apt-get --force-yes install "linux-image-${KERNEL_VERSION}"
+fi
+
+# Install optionally present rootfs static data. This can be used to blast
+# custom firmware, kernel modules, etc. onto the image.
+# TODO: Remove this hack at some point.
+LOCAL_ASSETS="${FLAGS_build_root}/${FLAGS_arch}/local_assets"
+OPTIONAL_ROOTFS_DATA="${LOCAL_ASSETS}/rootfs_data.tgz"
+if [ -f "${OPTIONAL_ROOTFS_DATA}" ]; then
+  sudo tar -zxvf "${OPTIONAL_ROOTFS_DATA}" -C "${ROOT_FS_DIR}"
+fi
 
 # List all packages installed so far, since these are what the local
 # repository needs to contain.
 # TODO: Replace with list_installed_packages.sh when it is fixed up.
 dpkg --root="${ROOT_FS_DIR}" -l > \
   "${OUTPUT_DIR}/package_list_installed.txt"
 
 cleanup_rootfs_mounts
 trap - EXIT