(setup cross project)
File -> New -> C Project
"C Project" window
    Project name: hello
    Project type: Hello World ANSI C Project
    Toolchains: Cross GCC
"Basic Settings" window
    (author, copyright, ...)
"Select Configurations" window
    Debug, Release
"Cross GCC Command" window
    Cross compiler prefix: arm-linux-gnueabihf-
    Cross compiler path: /opt/gcc-linaro-6.3.1-2017.05-x86_64_arm-linux-gnueabihf/bin

(modify existing project)
Project -> Properties
C/C++ Build -> Settings

===================
 Create Connection
===================

open the new connection dialog:
  Target -> New Connection
  Generic Connection
  Connection Name: myboard
  Type: TCP
  Host: (ip address of board)

NOTE: The connection is activated immediately so the board must be online
      and tcf-agent must be running on the board. The connection can be
      controlled with:
        Target -> Connect/Disconnect

!!!
!!! This "setup debug" section is outdated! It is better to cross-compile
!!! the tcf-agent (https://www.eclipse.org/tcf/downloads.php) and setup
!!! the debug connection like Yocto (HOWTO-eclipse-yocto.txt).
!!!
!!! NOTE: The '"Debugger" tab' part of the below instructions is still
!!!       valid and necessary!
!!!

(setup debug)
Run -> Debug Configurations
"Create, manage, and run configurations" window
    select "C/C++ Remote Application" and click "New" icon
"Main" tab
    Connection: New...
"Create a new connection" window
    Connection type: SSH
"New Connection" window
    Connection name: qemu-arm
    Host: localhost
    User: root
    Password based authentication
    Password: root
    Advanced
        Port: 2222
        Use login shell
        Login shell command: /bin/sh -c '{0}'
"Main" tab
    Remote Abolsute File Path for C/C++ Application: /hello
"Debugger" tab
    "Main" sub-tab
        GDB debugger: /opt/gcc-linaro-6.3.1-2017.05-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-gdb
    "Gdbserver Settings" sub-tab
        Port number: 2345