Simplified counting CPUs.

src/scripts/common.sh

 # 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.
 
 # Common constants for build scripts
 # This must evaluate properly for both /bin/bash and /bin/sh
 
 # All scripts should die on error unless commands are specifically excepted
 # by prefixing with '!' or surrounded by 'set +e' / 'set -e'.
 # TODO: Re-enable this once shflags is less prone to dying.
 #set -e
 
 # The number of jobs to pass to tools that can run in parallel (such as make
 # and dpkg-buildpackage
-NUM_JOBS=`cat /proc/cpuinfo | grep processor | awk '{a++} END {print a}'`
+NUM_JOBS=`grep -c "^processor" /proc/cpuinfo`
 
 # Store location of the calling script.
 TOP_SCRIPT_DIR="${TOP_SCRIPT_DIR:-$(dirname $0)}"
 
 # Find root of source tree
 if [ "x$GCLIENT_ROOT" != "x" ]
 then
   # GCLIENT_ROOT already set, so we're done
   true
 elif [ "x$COMMON_SH" != "x" ]
@@ skipping 157 matching lines @@
   # Positional parameters from calling script.  :? means "fail if unset".
   PKG_NAME=${1:?}
   shift
 
   if [ -z `which $PKG_NAME` ]
   then
     echo "Can't find $PKG_NAME; attempting to install it."
     sudo apt-get --yes --force-yes install $PKG_NAME
   fi
 }