Build error

[gongzelong0718]

Sorry, I am a newbie for golang. Could you help me with the build error?

zelongg@zelongg:~/Code/youjumpijump$ go version
go version go1.6 linux/amd64
zelongg@zelongg:~/Code/youjumpijump$ CGO_ENABLED=0 GOARCH=arm GOOS=linux go build -o youjumpijump-android android/main.go
android/main.go:14:2: cannot find package "github.com/faceair/youjumpijump" in any of:
	/usr/local/lib/go/src/github.com/faceair/youjumpijump (from $GOROOT)
	($GOPATH not set)
zelongg@zelongg:~/Code/youjumpijump$ vim android/main.go 
zelongg@zelongg:~/Code/youjumpijump$ 

[faceair]

move the repository to $GOPATH/src/github.com/faceair folder or go get github.com/faceair/youjumpijump && cd $GOPATH/src/github.com/faceair/youjumpijump && CGO_ENABLED=0 GOARCH=arm GOOS=linux go build -o youjumpijump-android android/main.go

[gongzelong0718]

Thanks for your reply, mind my asking what is $GOPATH?

Do I need to set the path in environment like ~/.bashrc?

zelongg@zelongg:~/Code/youjumpijump$ go get github.com/faceair/youjumpijump && cd $GOPATH/src/github.com/faceair/youjumpijump && CGO_ENABLED=0 GOARCH=arm GOOS=linux go build -o youjumpijump-android android/main.go
package github.com/faceair/youjumpijump: cannot download, $GOPATH not set. For more details see: go help gopath

vim ~/.bashrc 
#Go
export GOROOT=/usr/local/lib/go
export GOBIN=/usr/local/lib/go/bin
export PATH=$PATH:$GOBIN

[faceair]

https://github.com/golang/go/wiki/GOPATH
mkdir~/Code/Go && echo "export GOPATH=~/Code/Go" >> ~/.bashrc

[gongzelong0718]

mkdir ~/go && echo "export GOPATH=~/go" >> ~/.bashrc

zelongg@zelongg:~/go/src/github.com/faceair/youjumpijump$ CGO_ENABLED=0 GOARCH=arm GOOS=linux go build -o youjumpijump-android android/main.go
# github.com/faceair/youjumpijump
./jump.go:22: undefined: os.Executable

zelongg@zelongg:~/go/src/github.com/faceair/youjumpijump$ go version
go version go1.6 linux/amd64

According to this one, asticode/go-astilectron#9

I had to update the go version from 1.6 to 1.8.

It seems very troublesome to update the go version. But I will have a try.

[gongzelong0718]

https://golang.org/doc/install?download=go1.8.5.linux-amd64.tar.gz

把原来的/usr/local/lib下的go文件夹改名为go1.6
zelongg@zelongg:~/go/src/github.com/faceair/youjumpijump$ sudo mv /usr/local/lib/go/ /usr/local/lib/go1.6

改名后go version，找不到go的命令，说明成功。

zelongg@zelongg:~/go/src/github.com/faceair/youjumpijump$ sudo tar -zxvf ~/Downloads/go1.8.5.linux-amd64.tar.gz -C /usr/local/lib/

zelongg@zelongg:~/go/src/github.com/faceair/youjumpijump$ go versiongo version go1.8.5 linux/amd64

zelongg@zelongg:~/go/src/github.com/faceair/youjumpijump$ CGO_ENABLED=0 GOARCH=arm GOOS=linux go build -o youjumpijump-android android/main.go

zelongg@zelongg:~/go/src/github.com/faceair/youjumpijump$ ls -la
total 5044
drwxrwxr-x 7 zelongg zelongg 4096 1月 4 15:37 .
drwxrwxr-x 3 zelongg zelongg 4096 1月 4 14:46 ..
drwxrwxr-x 2 zelongg zelongg 4096 1月 4 14:47 android
drwxrwxr-x 8 zelongg zelongg 4096 1月 4 15:37 .git
drwxrwxr-x 2 zelongg zelongg 4096 1月 4 14:47 .github
-rw-rw-r-- 1 zelongg zelongg 34 1月 4 14:47 .gitignore
-rw-rw-r-- 1 zelongg zelongg 221 1月 4 14:47 glide.lock
-rw-rw-r-- 1 zelongg zelongg 83 1月 4 14:47 glide.yaml
drwxrwxr-x 2 zelongg zelongg 4096 1月 4 14:47 ios
-rw-rw-r-- 1 zelongg zelongg 3814 1月 4 14:47 jump.go
-rw-rw-r-- 1 zelongg zelongg 4035 1月 4 14:47 README.md
-rw-rw-r-- 1 zelongg zelongg 2029 1月 4 14:47 request.go
-rw-rw-r-- 1 zelongg zelongg 1368 1月 4 14:47 similar.go
drwxrwxr-x 3 zelongg zelongg 4096 1月 4 14:47 vendor
-rwxrwxr-x 1 zelongg zelongg 5227438 1月 4 15:37 youjumpijump-android

generate new file : youjumpijump-android

[gongzelong0718]

Thanks for your help. I build it successfully.
Have a nice day :)

[gongzelong0718]

1
Could you share any documents about the cross build arguments?
http://blog.jyootai.com/blog/2015/05/08/golang-cross-platform-compile.html
Why CGO_ENABLED=0 GOARCH=arm GOOS=linux
Why not CGO_ENABLED=0 GOARCH=arm64 GOOS=linux
Is it because most of android devices are 32 bit arm linux?

2
https://golang.org/doc/code.html#GOPATH
I thought the output should be in ${GOPATH}/bin
How do you know you can generate youjumpijump-android in ~/go/src/github.com/faceair/youjumpijump
Could you share the document?
Because the official guide only talks about the situation that we only have one .go file.