systemname=`uname -a`
#echo $systemname

OSDEFINFO=$(echo "DEFINES += SYSTEM_UBUNTU1804")

ubuntu1804="18.04."
ubuntu1604="16.04."
resultos=$(echo $systemname | grep "Ubuntu")
if [ "$resultos" != "" ]
then
  result=$(echo $systemname | grep "${ubuntu1804}")
  if [ "$result" != "" ]
  then
#      echo "ubuntu 18.04"
      OSDEFINFO=$(echo "DEFINES += SYSTEM_UBUNTU1804")
  fi

  result=$(echo $systemname | grep "${ubuntu1604}")
  if [ "$result" != "" ]
  then
#      echo "ubuntu 16.04"
      OSDEFINFO=$(echo "DEFINES += SYSTEM_UBUNTU1604")
  fi
fi



if [ -f "systemdef.pri" ]; then
#  echo "file exist."
  OLDOSDEFINFO=$(sed -n '/DEFINES += SYSTEM/p' systemdef.pri)
#  echo "old:"$OLDOSDEFINFO
  if [ ! "$OSDEFINFO"x = "$OLDOSDEFINFO"x ]; then
	echo "replace DEFINES in systemdef.pri"
	sed -i "s/^.*DEFINES += SYSTEM.*$/DEFINES += SYSTEM_UBUNTU1804/" systemdef.pri 
  fi
else
  echo "systemdef.pri not exist."
fi