On this note:
1. We do the installation of go on the mac
2. Then create a simple hello world program
3. Execute and test
4. Build the code [ for this example its for mac]
5. Setup cross platform build
Installation of go [ for this example on mac ]
- For detail information: link: http://golang.org/doc/install
- installed from the tar.gz, but you can try from mac pkg file too.
- created a directory "go" under "/usr/local"
- downloaded go1.3.3.darwin-amd64-osx10.8.tar.gz from https://golang.org/dl/
- copied the file to /usr/local folder.
- change the ownership or give the full access to your current user for /usr/local/go folder
- extract the your download file go1.3.3.darwin-amd64-osx10.8.tar.gz it will extract everything to your /usr/local/go folder
- update your PATH with adding /usr/local/go/bin
- type go and you should see the go usage output. [ it mean you have successfully install go :) ]
Create a simple hello world program
package main
import "fmt"
func main() {
fmt.Printf("hello, world\n")
}
Execute and test
$ go run hello.go
hello, world
Build the code [ for this example its for mac]
$
go build -o hello-mac hello.go
The above command will create an
mac executable file.
$file hello-mac
hello-mac: Mach-O 64-bit executable x86_64
now you can run the code directly to the mac os:
$ ./hello-mac
hello, world
Setting up cross build
Further detail information: Link:
http://dave.cheney.net/2013/07/09/an-introduction-to-cross-compilation-with-go-1-1
$ cd /usr/local/go/scr
./all.bash [ if you get some error, try with
sudo , just incase if you don't have write access. ]
https://github.com/davecheney/golang-crosscompile
$
git clone git://github.com/davecheney/golang-crosscompile.git
$
source golang-crosscompile/crosscompile.bash
[ if you get some error, try with
sudo , just incase if you don't have write access. ]
$
go-crosscompile-build-all
[ if you get some error, try with
sudo , just incase if you don't have write access. ]
This will compile the Go runtime and standard library for each platform. You can see these packages if you look in go/pkg.
% ls -1 go/pkg
darwin_386
darwin_amd64
freebsd_386
freebsd_amd64
linux_386
linux_amd64
linux_arm
obj
tool
windows_386
windows_amd64
And in your shell you can find all the following commands:
go go-darwin-386 go-linux-386 go-windows-386
go-all go-darwin-amd64 go-linux-amd64 go-windows-amd64
go-build-all go-freebsd-386 go-linux-arm godoc
go-crosscompile-build go-freebsd-amd64 go-openbsd-386 gofmt
go-crosscompile-build-all go-freebsd-arm go-openbsd-amd64
go-build-all hello.go [
This will build your code for all the platform :) ]
and you can see all your build file:
hello-darwin-386
hello-freebsd-arm
hello-mac
hello-windows-amd64
hello-darwin-amd64
hello-linux-386
hello-openbsd-386
hello.go
hello-freebsd-386
hello-linux-amd64
hello-openbsd-amd64
hello-freebsd-amd64
hello-linux-arm
hello-windows-386
I have tested and found, I can able to run the code in different arch.
NOTE: for windows build file, rename them to .exe before running them.
hello-darwin-386: Mach-O executable i386
hello-darwin-amd64: Mach-O 64-bit executable x86_64
hello-freebsd-386: ELF 32-bit LSB executable, Intel 80386, version 1 (FreeBSD), statically linked, not stripped
hello-freebsd-amd64: ELF 64-bit LSB executable, x86-64, version 1 (FreeBSD), statically linked, not stripped
hello-freebsd-arm: ELF 32-bit LSB executable, ARM, version 1 (FreeBSD), statically linked, not stripped
hello-linux-386: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, not stripped
hello-linux-amd64: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, not stripped
hello-linux-arm: ELF 32-bit LSB executable, ARM, version 1 (SYSV), statically linked, not stripped
hello-openbsd-386: ELF 32-bit LSB executable, Intel 80386, version 1 (OpenBSD), statically linked, for OpenBSD, not stripped
hello-openbsd-amd64: ELF 64-bit LSB executable, x86-64, version 1 (OpenBSD), statically linked, for OpenBSD, not stripped
hello-windows-386: PE32 executable for MS Windows (console) Intel 80386 32-bit
hello-windows-amd64: PE32+ executable for MS Windows (console) Mono/.Net assembly
hello.go: ASCII Java program text <---- For me at mac it shows like this :)
