Plan9.md - wiki - Git at Google

 # Introduction

 An experimental port of [Go](https://golang.org) is available for the [Plan 9 from Bell Labs](https://9p.io/plan9) operating system.

 # Supported architectures

 The Plan 9 port of Go is available for the following architectures:

 * 386
 * amd64
 * arm

 # Supported kernels

 The current Go distribution has been tested successfully on:

 * [Plan 9 from Bell Labs](https://9p.io/plan9) (386 and arm) kernel
 * [9front](http://9front.org) amd64 kernel
 * Charles Forsyth's [9k](https://bitbucket.org/forsyth/plan9-9k) (amd64) kernel

 # Requirements

 Plan 9 requires a kernel providing the following system calls:

 * tsemacquire (available since [2012-06-30](https://github.com/0intro/plan9/commit/bd0c9332d5b1da1371d03e8e0ad03de0d08e08c6))
 * nsec (available since [2014-05-15](https://github.com/0intro/plan9/commit/6c1d8fd563a815cbbac06f61bdc1d0f6331c3d3b))

 A fix to the pread system call is required, so pread will not update the channel offset when reading a file:

 * [9-pread-offset](http://9legacy.org/9legacy/patch/9-pread-offset.diff)

 The TCP connection control file must handle the "close" message to be able close a TCP connection gracefully, while waking up the readers:

 * [9-tcp-close](http://9legacy.org/9legacy/patch/9-tcp-close.diff)

 A fix to Fossil is required to increment Qid.vers after a wstat, so a truncate followed by a read will return the content of the new file instead of the cached content.

 * [fossil-wstat-qid](http://9legacy.org/9legacy/patch/fossil-wstat-qid.diff)

 You will need support for SHA-2 signatures in X.509 certificates, so you could download sources from repositories hosted on GoogleSource, GitHub and so on.

 * [libsec-x509-sha2](http://9legacy.org/9legacy/patch/libsec-x509-sha2.diff)

 If you're running Plan 9 on Raspberry Pi, you'll require the latest [bcm](https://9p.io/magic/webls?dir=/sources/contrib/miller/9/bcm) kernel from Richard Miller.

 # Installation

 Since Go is written in Go, you may want to bootstrap Go with Go 1.4.3, which is the latest release of Go written in C.

 However, since the Go 1.4 runtime wasn't mature enough on Plan 9, we recommend you to bootstrap from a more recent version of Go, using another operating system.

 ## Boostraping from Plan 9

 First, install Go 1.4:

 ```
 cd /tmp
 git clone -b go1.4.3 https://go.googlesource.com/go go1.4
 cd go1.4/src
 hget http://9legacy.org/go/patch/syscall-exec.diff | ape/patch -p2
 make.rc
 ```

 The [syscall-exec](http://9legacy.org/go/patch/syscall-exec.diff) patch is required if you're running a machine with SMP enabled.

 Then, set the `GOROOT_BOOTSTRAP` environment variable:

 ```
 GOROOT_BOOTSTRAP=/tmp/go1.4
 ```

 Finally, install the latest version of Go:

 ```
 cd /tmp
 git clone https://go.googlesource.com/go
 cd go/src
 all.rc
 bind -a /tmp/go/bin /bin
 ```
 Go is now ready to use.

 ## Bootstraping from another operating system

 First, you must have installed Go on this operating system, following the [Go installation instructions](https://golang.org/doc/install).

 Then, you can cross-compile a Go toolchain for Plan 9:

 ```
 cd $GOROOT/src
 GOOS=plan9 GOARCH=386 ./bootstrap.bash
 ```

 Then, the bootstrap toolchain will be available in `../../go-plan9-386-bootstrap.tbz`.

 Finally, you can extract this archive to your Plan 9 machine.

 For example:

 ```
 cd /tmp
 tar xzf go-plan9-386-bootstrap.tbz
 bind -a /tmp/go-plan9-386-bootstrap/bin /bin
 ```

 Go is now ready to use.

 You'll be able to use this installation of Go to bootstrap future Go releases, by setting the `GOROOT_BOOTSTRAP` environment variable:

 ```
 GOROOT_BOOTSTRAP=/tmp/go-plan9-386-bootstrap
 ```

 ## Bootstraping from binaries

 A [binary package](https://storage.googleapis.com/go-builder-data/gobootstrap-plan9-386.tar.gz) for plan9/386 is available.

 This binary package is used to bootstrap Go on the plan9/386 builder.

 ```
 cd /tmp
 hget -o gobootstrap-plan9-386.tar.gz https://storage.googleapis.com/go-builder-data/gobootstrap-plan9-386.tar.gz
 mkdir gobootstrap-plan9-386
 cd  gobootstrap-plan9-386
 tar xzf ../gobootstrap-plan9-386.tar.gz
 ```

 You'll be able to use this binary package of Go to bootstrap Go, by setting the `GOROOT_BOOTSTRAP` environment variable:

 ```
 GOROOT_BOOTSTRAP=/tmp/gobootstrap-plan9-386
 ```

 # Git

 Git is not available on Plan 9. However a [Git wrapper](http://9legacy.org/9legacy/tools/git) is available as a simple rc script. It includes everything you need to use the [go](https://golang.org/cmd/go) tool.

 # Builders

 Three Plan 9 builders are currently running and reporting the results to the [Go Dashboard](http://build.golang.org/):

 * plan9-386 is running Plan 9 from Bell Labs (386 kernel) on Google Compute Engine (new-style builder)
 * plan9-arm is running Plan 9 from Bell Labs (arm kernel) on a Raspberry Pi 3 (old-style builder)
 * plan9-amd64-9front is running 9front (amd64 kernel) on a virtual machine (old-style builder)

 # Status

 The Plan 9 port of Go is considered experimental and is still a work-in-progress. There is a number of known issues available on the [Go issue tracker](https://golang.org/issues).

 # Issues

 Many issues are currently open on the [Go issue tracker](https://golang.org/issues) with the [OS-Plan9](https://github.com/golang/go/issues?q=is%3Aopen+is%3Aissue+label%3AOS-Plan9) label.

 # Help

 The Plan 9 port of Go is a community-driven port. Any help to improve the Go port on Plan 9 would be highly appreciated.

 # Maintainer

 Many people have contributed to the Plan 9 port of Go. Since December 2013, the Plan 9 port of Go is maintained by [David du Colombier](https://github.com/0intro).
	# Introduction

	An experimental port of [Go](https://golang.org) is available for the [Plan 9 from Bell Labs](https://9p.io/plan9) operating system.

	# Supported architectures

	The Plan 9 port of Go is available for the following architectures:

	* 386
	* amd64
	* arm

	# Supported kernels

	The current Go distribution has been tested successfully on:

	* [Plan 9 from Bell Labs](https://9p.io/plan9) (386 and arm) kernel
	* [9front](http://9front.org) amd64 kernel
	* Charles Forsyth's [9k](https://bitbucket.org/forsyth/plan9-9k) (amd64) kernel

	# Requirements

	Plan 9 requires a kernel providing the following system calls:

	* tsemacquire (available since [2012-06-30](https://github.com/0intro/plan9/commit/bd0c9332d5b1da1371d03e8e0ad03de0d08e08c6))
	* nsec (available since [2014-05-15](https://github.com/0intro/plan9/commit/6c1d8fd563a815cbbac06f61bdc1d0f6331c3d3b))

	A fix to the pread system call is required, so pread will not update the channel offset when reading a file:

	* [9-pread-offset](http://9legacy.org/9legacy/patch/9-pread-offset.diff)

	The TCP connection control file must handle the "close" message to be able close a TCP connection gracefully, while waking up the readers:

	* [9-tcp-close](http://9legacy.org/9legacy/patch/9-tcp-close.diff)

	A fix to Fossil is required to increment Qid.vers after a wstat, so a truncate followed by a read will return the content of the new file instead of the cached content.

	* [fossil-wstat-qid](http://9legacy.org/9legacy/patch/fossil-wstat-qid.diff)

	You will need support for SHA-2 signatures in X.509 certificates, so you could download sources from repositories hosted on GoogleSource, GitHub and so on.

	* [libsec-x509-sha2](http://9legacy.org/9legacy/patch/libsec-x509-sha2.diff)

	If you're running Plan 9 on Raspberry Pi, you'll require the latest [bcm](https://9p.io/magic/webls?dir=/sources/contrib/miller/9/bcm) kernel from Richard Miller.

	# Installation

	Since Go is written in Go, you may want to bootstrap Go with Go 1.4.3, which is the latest release of Go written in C.

	However, since the Go 1.4 runtime wasn't mature enough on Plan 9, we recommend you to bootstrap from a more recent version of Go, using another operating system.

	## Boostraping from Plan 9

	First, install Go 1.4:

	```
	cd /tmp
	git clone -b go1.4.3 https://go.googlesource.com/go go1.4
	cd go1.4/src
	hget http://9legacy.org/go/patch/syscall-exec.diff \| ape/patch -p2
	make.rc
	```

	The [syscall-exec](http://9legacy.org/go/patch/syscall-exec.diff) patch is required if you're running a machine with SMP enabled.

	Then, set the `GOROOT_BOOTSTRAP` environment variable:

	```
	GOROOT_BOOTSTRAP=/tmp/go1.4
	```

	Finally, install the latest version of Go:

	```
	cd /tmp
	git clone https://go.googlesource.com/go
	cd go/src
	all.rc
	bind -a /tmp/go/bin /bin
	```
	Go is now ready to use.

	## Bootstraping from another operating system

	First, you must have installed Go on this operating system, following the [Go installation instructions](https://golang.org/doc/install).

	Then, you can cross-compile a Go toolchain for Plan 9:

	```
	cd $GOROOT/src
	GOOS=plan9 GOARCH=386 ./bootstrap.bash
	```

	Then, the bootstrap toolchain will be available in `../../go-plan9-386-bootstrap.tbz`.

	Finally, you can extract this archive to your Plan 9 machine.

	For example:

	```
	cd /tmp
	tar xzf go-plan9-386-bootstrap.tbz
	bind -a /tmp/go-plan9-386-bootstrap/bin /bin
	```

	Go is now ready to use.

	You'll be able to use this installation of Go to bootstrap future Go releases, by setting the `GOROOT_BOOTSTRAP` environment variable:

	```
	GOROOT_BOOTSTRAP=/tmp/go-plan9-386-bootstrap
	```

	## Bootstraping from binaries

	A [binary package](https://storage.googleapis.com/go-builder-data/gobootstrap-plan9-386.tar.gz) for plan9/386 is available.

	This binary package is used to bootstrap Go on the plan9/386 builder.

	```
	cd /tmp
	hget -o gobootstrap-plan9-386.tar.gz https://storage.googleapis.com/go-builder-data/gobootstrap-plan9-386.tar.gz
	mkdir gobootstrap-plan9-386
	cd gobootstrap-plan9-386
	tar xzf ../gobootstrap-plan9-386.tar.gz
	```

	You'll be able to use this binary package of Go to bootstrap Go, by setting the `GOROOT_BOOTSTRAP` environment variable:

	```
	GOROOT_BOOTSTRAP=/tmp/gobootstrap-plan9-386
	```

	# Git

	Git is not available on Plan 9. However a [Git wrapper](http://9legacy.org/9legacy/tools/git) is available as a simple rc script. It includes everything you need to use the [go](https://golang.org/cmd/go) tool.

	# Builders

	Three Plan 9 builders are currently running and reporting the results to the [Go Dashboard](http://build.golang.org/):

	* plan9-386 is running Plan 9 from Bell Labs (386 kernel) on Google Compute Engine (new-style builder)
	* plan9-arm is running Plan 9 from Bell Labs (arm kernel) on a Raspberry Pi 3 (old-style builder)
	* plan9-amd64-9front is running 9front (amd64 kernel) on a virtual machine (old-style builder)

	# Status

	The Plan 9 port of Go is considered experimental and is still a work-in-progress. There is a number of known issues available on the [Go issue tracker](https://golang.org/issues).

	# Issues

	Many issues are currently open on the [Go issue tracker](https://golang.org/issues) with the [OS-Plan9](https://github.com/golang/go/issues?q=is%3Aopen+is%3Aissue+label%3AOS-Plan9) label.

	# Help

	The Plan 9 port of Go is a community-driven port. Any help to improve the Go port on Plan 9 would be highly appreciated.

	# Maintainer

	Many people have contributed to the Plan 9 port of Go. Since December 2013, the Plan 9 port of Go is maintained by [David du Colombier](https://github.com/0intro).