A Tutorial Introduction To Programming Language GB

Go programming was recently released by Google as a language system, focusing on ease of development, compilation rapid and simultaneous computing. It could well be the ideal language to develop a custom Web server and distributed computing in the near future. But we do not know with certainty, because it is still tested. Anyway, it does not hurt to have a little fun with ours.

I'm going to guide you to build a build environment, assembling the first Go program - "Hello World!". knowledge and skills in the moderate administration of Linux servers and programming is preferred. To keep things simple, this tutorial assumes you log in as root (so there is no need to use "sudo" to do things). Now let's go.

First you need a Linux server set up. You can install the distribution on your own computer or simply for a VPS. I use Debian 5.0 on a server Rackspace Cloud.

Log of the SSH server, add these lines (the environment variables Go translators need to work properly) to.bash_profile root's home directory:

GOROOT Export = $ HOME / go

Export GOARCH = 386

Export GOOS = linux

GOBIN Export = $ HOME / bin

PATH = $ PATH: $ Gobin

GOARCH = 386 is 32-bit architecture, if the server's CPU is 64-bit architecture, use:

Export GOARCH = amd64

In place. So they have everything in its place the following order:

source.bash_profile

Most likely you do not have the "hg" command installed. Run:

aptitude install mercurial

To install it. command "hg" to get the source code from Google:

hg clone-r $ GOROOT Publications

Simply download the source code release in the directory you just set at $ GOROOT / home / user / go. Now we will install the necessary compilers (GCC), C library and utilities related to the cause of GB collection is written in C:

aptitude install gcc bison libc6-dev make ed

Where is the Bison parser generator, ed is a text editor and compiler. If all goes well, you can compile Go now:

cd $ GOROOT / src

all

The base compiler test at the end of the compilation.

When it was over. We try to write and translate our first Go program Although you can use the editor of ED, we have just installed the program to write and record (prior to compilation, the program has only a single text file), I intend to use the "nano" Windows Notepad cousin of Linux to make a demo. Open the nano editor:

nano hi.go

And the guy in the following manner:

main package

import "FMT"

resulted in main () {

fmt.Printf ("Hello world!")

"Ctrl + x 'and press' y' to save the file to hi.go. Now that you have a source file hi.go GB, we can prepare:

8g hi.go

Whose output is a file named hi.8 to be bound by:

8 l hi.8

Which would output a second file called 8.out which is a binary executable - you did. Just run the file compiled by 8.out:

./8.out

It should print a new line: "Hello, world!

Note that if the server architecture is 64 bits, the compiler '6 g '(for 64-bit) instead of "8 g' (for 32 bits), the linker '6 l 'instead of '8' s and the output file and hi.6 6.out. You get the idea.