Radix cross Linux Toolchains

#!/bin/bash

UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
UNAME_SYSTEM=`(uname -s) 2>/dev/null`  || UNAME_SYSTEM=unknown
UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown

case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
  i*:CYGWIN*:*)
    echo ${UNAME_MACHINE}-pc-cygwin
    exit ;;
  *:MINGW*:*)
    echo ${UNAME_MACHINE}-pc-mingw32
    exit ;;
  amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*)
    echo x86_64-unknown-cygwin
    exit ;;
  i*86:Linux:*:*)
    if [ -f /etc/slackware-version ]; then
      system=`cat /etc/slackware-version | cut -f 1 -d ' ' | tr 'S' 's'`
      echo ${UNAME_MACHINE}-${system}-linux
    else
      echo ${UNAME_MACHINE}-unknown-linux-gnu
    fi
    exit ;;
  x86_64:Linux:*:*)
    if [ -f /etc/slamd64-version ]; then
      system=`cat /etc/slamd64-version | cut -f 1 -d ' ' | tr 'S' 's'`
      echo x86_64-${system}-linux
    elif [ -f /etc/slackware-version ]; then
      system=`cat /etc/slackware-version | cut -f 1 -d ' ' | tr 'S' 's'`
      echo x86_64-${system}-linux
    elif [ -f /etc/os-release ]; then
      system=`cat /etc/os-release | grep -e '^ID=' | cut -f 2 -d '='`
      echo x86_64-linux-gnu
    else
      echo x86_64-unknown-linux-gnu
    fi
    exit ;;
esac

####### echo "unknown-unknown-unknown-unknown"

cat >&2 <<EOF

`basename $0`: unable to reciognize build system type

   MACHINE = '${UNAME_MACHINE}'
   SYSTEM  = '${UNAME_SYSTEM}'
   RELEASE = '${UNAME_RELEASE}'
   VERSION = '${UNAME_VERSION}'

EOF

exit 1