dd-wrt-go

How to build naitive applications in go, then run on dd-wrt (Specifically on a Netgear R7000)

How it works

The Makefile does all the heavy lifting. Notably, it sets the following:

1. Toolchain path
2. LDFLAGS to '--linkmode external --extldflags "-static"`
3. Calls go with the following variables set:
   • CC - $TOOLCHAIN/bin/whatever-gcc
   • LDFLAGS to the above
   • GOOS - linux
   • GOARCH - arm
   • GOARM=5

Installation

For installation, all you have to do is find the toolchain, and use the magic from my Makefile.

Install the Toolchain

You can find the tool chain from the dd-wrt site:

• http://www.dd-wrt.com/site/support/other-downloads
• Specifically: http://download1.dd-wrt.com/dd-wrtv2/downloads/toolchains/toolchains.tar.xz

The toolchain that I found to work was: toolchain-arm_cortex-a9_gcc-4.8-linaro_musl-1.1.5_eabi

I installed that into /usr/local/toolchain-arm_cortex-a9_gcc-4.8-linaro_musl-1.1.5_eabi

Building

Building is easy enough -- just type "make" and the C and go versions of "Hello World" will be built.

Testing

After building (type "make" after following above instructions), install the hellogo application onto your router and test it:

1. ssh into your router
2. scp the file over: root@router# scp dev-box:path/to/hellogo .
3. Mark it executiable: root@router# chmod +x hellogo
4. And, execute it!: root@router# ./hellogo

You should see:

root@router:~# ./hellogo
Hello GoWorld!
root@router:~#