play-golang-on-openwrt-with-gcc5.2.md

Preparation

You need to install Linux OS. We suggest to install Ubuntu 14.04. And ensure that you have installed follows software.

  sudo apt-get install g++ libncurses5-dev zlib1g-dev bison flex unzip autoconf gawk make \
  gettext gcc binutils patch bzip2 libz-dev asciidoc subversion git

Get source code

  git clone --depth=1 https://github.com/mqmaker/witi-openwrt.git

Configure

• First, select correct target profile. As follows:

        $ make menuconfig
        
        #Select Target system
        Target System (MTK/Ralink APSOC) --->
        Subtarget (MT7621 based boards) --->
              (   ) MT7620 based boards
              ( x ) MT7621 based boards
              (   ) MT7628 based boards
        
        #Select Target Profile
        Target Profile (MQmaker Witi Board Profile) --->
              (   ) Default Profile
              ( x ) MQmaker Witi Board Profile
        
        #Select Advanced configuration options (for developers) --->
        #Select Toolchain Options  --->
        #Select Binutils Verion (binutils 2.22) --->
              (   ) ...
              ( x ) Linaro bintutils 2.24
        #Select Gcc compiler Version --->
              (   ) ...
              ( x ) gcc 5.2.0
        #Select C Library implementation --->
              ( x ) Use eglibc
              (   ) Use uClibc
        #Check [*] Build/install gccgo compiler?

• Compile
  Now, we have completed minimum configuration. Next you can compile WiTi source code. If you want to show the process of compilationk, user V=s.

        make V=s -j 4

or

        make -j 4

OK, enjoy a cup of tea, wait it complete. ^_^

Using gccgo cross compiler

• Set enviroment variable

        cd staging_dir (In your clone of witi-openwrt repo)
        export STAGING_DIR=$(pwd)

• At anywhere, create a helloworld.go

  ```go
  package main
  import "fmt"
  
  func main() {
  	fmt.Println("Hello, World")
  }
  ```

• Compile your go program

        path/to/mipsel-openwrt-linux-gccgo helloworld.go -o hello -static-libgo

Now we done, Have fun!