View source for GoLang

This is a small Wiki page about the [http://maemo.org/packages/view/golang/ golang package] on Maemo. The package contains the standalone go compiler and libraries targeting armv6.

== Creating a Hello world application using the go programming language ==

Creating a Hello world application using the [http://golang.org/ go language] on the [[Nokia N900|N900]]. The go compiler and libraries for Maemo are packaged in a package called <code>golang</code> that can be installed from the fremantle/free repository. The package puts all its content in a directory called <code>/opt/go</code> to follow Maemo packaging policies.

Once the package is installed we need to set a few environments variables to make the go compiler happy.

Those are:

 export GOROOT=/opt/go
 export GOOS=linux
 export GOARCH=arm
 export GOBIN=/opt/go/bin
 export GOPKG=/opt/go/pkg
 PATH=$PATH:$GOBIN

The packager provides a script to to this that can be sourced

 ~ $ . /opt/go/bin/go_profile


Now off to create Hello world. We will create a directory in the users home directory create a small go hello world file, compile, link and run it.

Creating the directory using mkdir

 mkdir hello_go

Go into that directory and fire up an editor

 cd hello_go
 vi hello.go

Paste the following

<source lang="c">
package main

import "fmt"

func main() {
  fmt.Printf("Hello, Maemo\n")
}
</source>


exit vi and compile hello.go

 ~/hello_go $ 5g hello.go

Link it against the go libs (the output is a staticaly linked binary)

 ~/hello_go $ 5l hello.5

and now run it

 ~/hello_go $ ./5.out
 Hello, Maemo

If all went well you just ran your first go code on Maemo!

[[Category:Development]]