I can't build golang

[vox...@gmail.com]

I can't build golang due to cycle problem.

### What version of Go are you using (`go version`)?

The version on my pc is go version go1.7.1 darwin/amd64, but i downloaded a fresh version from git.

### What operating system and processor architecture are you using (`go env`)?

 ```

GOARCH="amd64"

GOBIN=""

GOEXE=""

GOHOSTARCH="amd64"

GOHOSTOS="darwin"

GOOS="darwin"

GOPATH="/Users/voxsim/Projects/go"

GORACE=""

GOROOT="/usr/local/Cellar/go/1.7.1/libexec"

GOTOOLDIR="/usr/local/Cellar/go/1.7.1/libexec/pkg/tool/darwin_amd64"

CC="clang"

GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/bt/fmr6z5wx2b9b2x9w51y2m_300000gn/T/go-build667588921=/tmp/go-build -gno-record-gcc-switches -fno-common"

CXX="clang++"

CGO_ENABLED="1"

 ```

### my env variables

Apple_PubSub_Socket_Render=/private/tmp/com.apple.launchd.dJIR793aPj/Render

COLORFGBG=7;0

ITERM_PROFILE=Default

XPC_FLAGS=0x0

PWD=/Users/voxsim/Projects/go/src

SHELL=/bin/zsh

SECURITYSESSIONID=186ee

TERM_PROGRAM_VERSION=3.0.10

TERM_PROGRAM=iTerm.app

PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/voxsim/.bin:/Users/voxsim/gopath/bin

COMMAND_MODE=unix2003

TERM=xterm-256color

HOME=/Users/voxsim

TMPDIR=/var/folders/bt/fmr6z5wx2b9b2x9w51y2m_300000gn/T/

USER=voxsim

XPC_SERVICE_NAME=0

LOGNAME=voxsim

ITERM_SESSION_ID=w0t2p1:22F762D5-BC47-4939-B825-1E5B2A641E1F

__CF_USER_TEXT_ENCODING=0x1F5:0x0:0x0

SHLVL=1

OLDPWD=/Users/voxsim/Projects/go

ZSH=/Users/voxsim/.oh-my-zsh

GOPATH=/Users/voxsim/gopath

EDITOR=nvim

DISABLE_AUTO_TITLE=true

PAGER=less

LESS=-R

LSCOLORS=Gxfxcxdxbxegedabagacad

ZSH_TMUX_TERM=screen-256color

_ZSH_TMUX_FIXED_CONFIG=/Users/voxsim/.oh-my-zsh/plugins/tmux/tmux.extra.conf

LC_CTYPE=UTF-8

_=/usr/bin/env

### What did you do?

After I checkout the project in ~/Projects/go e I read [here](https://golang.org/doc/contribute.html).

 ```

I setted GOROOT_BOOTSTRAP to /usr/local because my go installation is in /usr/local/bin/go:

export GOROOT_BOOTSTRAP=/usr/local

./all.bash

 ```

First result:

 ```

##### Building Go bootstrap tool.

cmd/dist

cmd/dist/build.go:8:2: cannot find package "bytes" in any of:

/usr/local/src/bytes (from $GOROOT)

/Users/voxsim/gopath/src/bytes (from $GOPATH)

cmd/dist/build.go:9:2: cannot find package "encoding/json" in any of:

/usr/local/src/encoding/json (from $GOROOT)

/Users/voxsim/gopath/src/encoding/json (from $GOPATH)

cmd/dist/test.go:9:2: cannot find package "errors" in any of:

/usr/local/src/errors (from $GOROOT)

/Users/voxsim/gopath/src/errors (from $GOPATH)

cmd/dist/build.go:10:2: cannot find package "flag" in any of:

/usr/local/src/flag (from $GOROOT)

/Users/voxsim/gopath/src/flag (from $GOPATH)

cmd/dist/build.go:11:2: cannot find package "fmt" in any of:

/usr/local/src/fmt (from $GOROOT)

/Users/voxsim/gopath/src/fmt (from $GOPATH)

cmd/dist/util.go:10:2: cannot find package "io" in any of:

/usr/local/src/io (from $GOROOT)

/Users/voxsim/gopath/src/io (from $GOPATH)

cmd/dist/test.go:12:2: cannot find package "io/ioutil" in any of:

/usr/local/src/io/ioutil (from $GOROOT)

/Users/voxsim/gopath/src/io/ioutil (from $GOPATH)

cmd/dist/test.go:13:2: cannot find package "log" in any of:

/usr/local/src/log (from $GOROOT)

/Users/voxsim/gopath/src/log (from $GOPATH)

cmd/dist/build.go:12:2: cannot find package "os" in any of:

/usr/local/src/os (from $GOROOT)

/Users/voxsim/gopath/src/os (from $GOPATH)

cmd/dist/build.go:13:2: cannot find package "os/exec" in any of:

/usr/local/src/os/exec (from $GOROOT)

/Users/voxsim/gopath/src/os/exec (from $GOPATH)

cmd/dist/build.go:14:2: cannot find package "path/filepath" in any of:

/usr/local/src/path/filepath (from $GOROOT)

/Users/voxsim/gopath/src/path/filepath (from $GOPATH)

cmd/dist/test.go:17:2: cannot find package "regexp" in any of:

/usr/local/src/regexp (from $GOROOT)

/Users/voxsim/gopath/src/regexp (from $GOPATH)

cmd/dist/util.go:15:2: cannot find package "runtime" in any of:

/usr/local/src/runtime (from $GOROOT)

/Users/voxsim/gopath/src/runtime (from $GOPATH)

cmd/dist/build.go:15:2: cannot find package "sort" in any of:

/usr/local/src/sort (from $GOROOT)

/Users/voxsim/gopath/src/sort (from $GOPATH)

cmd/dist/main.go:11:2: cannot find package "strconv" in any of:

/usr/local/src/strconv (from $GOROOT)

/Users/voxsim/gopath/src/strconv (from $GOPATH)

cmd/dist/build.go:16:2: cannot find package "strings" in any of:

/usr/local/src/strings (from $GOROOT)

/Users/voxsim/gopath/src/strings (from $GOPATH)

cmd/dist/build.go:17:2: cannot find package "sync" in any of:

/usr/local/src/sync (from $GOROOT)

/Users/voxsim/gopath/src/sync (from $GOPATH)

cmd/dist/test.go:21:2: cannot find package "time" in any of:

/usr/local/src/time (from $GOROOT)

/Users/voxsim/gopath/src/time (from $GOPATH)

 ```

I setted the GOPATH to the project:

 ```

export GOPATH=~/Projects/go

./all.bash

 ```

second result:

 ```

cmd/dist

import cycle not allowed

package cmd/dist

imports bytes

imports errors

imports runtime

imports runtime/internal/atomic

imports unsafe

imports runtime

 ```

Did i do something wrong?

I already open an issue in the github project (https://github.com/golang/go/issues/17581#issuecomment-256040098) but as ianlancetaylor pointed I did something wrong. Can someone help me? I did not set any GOROOT env variables. 

Is it possible to build the source of golang without installing before go?

Thanks,

voxsim

[Dave Cheney]

It looks like you have many conflicting versions of Go all smoshed on your machine at the moment.

You proably have something from homebrew; uninstall that first. Then look in /usr/local/go and remove that. Check /etc/paths.d for anything that is adding a go version to your path and remove that.

*** DO NOT SET GOROOT *** If you find GOROOT set, unset it, do not continue until you are sure that GOROOT is not present in your terminals environment.

Then, when you have removed all the versions of Go on your computer you can start again.

Download this https://golang.org/doc/install?download=go1.7.3.darwin-amd64.tar.gz, and unpack it somewhere, set the environment variable GOROOT_BOOTSTRAP to point to the place where you unpacked that.

Then download the source for the version of go you want to build, https://golang.org/doc/install/source?download=go1.7.3.src.tar.gz, and unpack that somewhere, cd into that directory, then into src/, then call ./make.bash (or ./all.bash if you want to run the tests)

Dave