### FILE cmsos

cmsos()
{
  # Determine the cpu architecture string.
  case `uname -p` in
    i*86) cpuarch=ia32;;
    x86_64) cpuarch=amd64;;
    *EMT*) cpuarch=amd64;;
    *) cpuarch=`uname -p`;;
  esac
 
  if [ "X$BUILD_ARCH" != X ]; then
      echo "$BUILD_ARCH"
  elif [ "X`uname -p`" = Xppc64 ]; then
    # hard code this, should be done better
      echo ydl5_ppc64
  elif [ "X`uname`" = XLinux ]; then
    if [ "X`uname -i`" = Xppc ]; then
    # hard code this, should be done better
      echo ydl5_ppc
    elif [ -f /etc/SuSE-release ]; then
      echo suse`grep -i '^version' < /etc/SuSE-release | tr -dc '[0-9]'`
    elif egrep -q "Red Hat Enterprise|Scientific|CentOS" /etc/redhat-release 2>/dev/null; then
      slc_version=`egrep "Red Hat Enterprise|Scientific|CentOS" /etc/redhat-release | \
		   sed 's/.*[rR]elease \([0-9]*\)\..*/\1/'`
      if [ "X`uname -i`" = Xi386 ]; then
        echo slc${slc_version}_ia32
      else
        echo slc${slc_version}_amd64
      fi
    elif grep -q Scientific /etc/rocks-release 2>/dev/null; then
        slc_version=`grep DISTRIB_RELEASE rocks-release | sed 's/DISTRIB_RELEASE="\([0-9]*\).*/\1/'`
  #   For the moment we assume that they are all ia32
  #      if grep -q Intel /proc/cpuinfo 2>/dev/null; then
          echo slc${slc_version}_ia32
  #      else
  #       echo slc${slc_version}_amd64
  #      fi
    elif grep -q PU_IAS /etc/redhat-release 2>/dev/null; then
         echo slc4_$cpuarch
    else
      archos= archosv=
      for f in debian_version slackware-version fedora-release \
  	     redhat-release altlinux-release gentoo-release \
  	     cobalt-release mandrake-release conectiva-release; do
        if [ -f /etc/$f ]; then
      	  archos=`echo $f | sed 's/[-_].*//'`
	  archosv=`tr -dc '[0-9]' < /etc/$f`
	  break
        fi
      done
      [ X$archos = Xredhat ] && archos=rh
      if [ -z "$archos" -o -z "$archosv" ]; then
        echo linux`uname -r | cut -d. -f1,2 | tr -d .`_$cpuarch
      else
        echo $archos$archosv_$cpuarch
      fi
    fi
  elif [ "X`uname`" = XDarwin ]; then
    case `sysctl hw.cpu64bit_capable | cut -f2 -d\ ` in 1) cpuarch=amd64;; 0) cpuarch=ia32;; esac
    echo osx`sw_vers -productVersion | cut -d. -f1,2 | tr -dc [0-9]`_$cpuarch
  elif [ "X`uname | cut -d_ -f1`" = XCYGWIN ]; then
    echo win32_$cpuarch
  else
    echo unsupported
  fi
}

defaultCompiler()
{
  case `cmsos` in
    slc4* ) echo gcc345 ;;
    slc5* ) echo gcc432 ;;
    osx104* ) echo gcc400 ;;
    osx105* ) echo gcc401 ;;
    osx106* ) echo gcc421 ;;
    * ) echo gcc345 ;;
  esac
}

cmsos